diff --git a/bin/configs/java-microprofile-rest-client-3.0-jackson.yaml b/bin/configs/java-microprofile-rest-client-3.0-jackson.yaml
index 06d0814d2f47..6df972d7728e 100644
--- a/bin/configs/java-microprofile-rest-client-3.0-jackson.yaml
+++ b/bin/configs/java-microprofile-rest-client-3.0-jackson.yaml
@@ -9,3 +9,4 @@ additionalProperties:
   configKey: petstore
   microprofileRestClientVersion: "3.0"
   hideGenerationTimestamp: true
+  useReflectionEqualsHashCode: true
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/model.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/model.mustache
index e10e68d8348b..2444f0eb46e8 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/model.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/model.mustache
@@ -1,6 +1,12 @@
 {{>licenseInfo}}
 package {{package}};
 
+{{#useReflectionEqualsHashCode}}
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+{{/useReflectionEqualsHashCode}}
+import java.util.Objects;
+import java.util.Arrays;
 {{#imports}}import {{import}};
 {{/imports}}
 {{#serializableModel}}
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojo.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojo.mustache
index afad09aa3cd8..10ffbcf6c76c 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojo.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojo.mustache
@@ -148,28 +148,5 @@ public class {{classname}} {{#parent}}extends {{{.}}}{{/parent}}{{#vendorExtensi
   {{/isReadOnly}}
 
   {{/vars}}
-
-  /**
-   * Create a string representation of this pojo.
-   */
-  @Override
-  public String toString() {
-    StringBuilder sb = new StringBuilder();
-    sb.append("class {{classname}} {\n");
-    {{#parent}}sb.append("    ").append(toIndentedString(super.toString())).append("\n");{{/parent}}
-    {{#vars}}sb.append("    {{name}}: ").append({{#isPassword}}"*"{{/isPassword}}{{^isPassword}}toIndentedString({{name}}){{/isPassword}}).append("\n");
-    {{/vars}}sb.append("}");
-    return sb.toString();
-  }
-
-  /**
-   * Convert the given object to string with each line indented by 4 spaces
-   * (except the first line).
-   */
-  private static String toIndentedString(Object o) {
-    if (o == null) {
-      return "null";
-    }
-    return o.toString().replace("\n", "\n    ");
-  }
+{{>pojoOverrides}}
 }
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojoOverrides.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojoOverrides.mustache
new file mode 100644
index 000000000000..f0fbb0b200e8
--- /dev/null
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pojoOverrides.mustache
@@ -0,0 +1,64 @@
+  @Override
+  public boolean equals(Object o) {
+  {{#useReflectionEqualsHashCode}}
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  {{/useReflectionEqualsHashCode}}
+  {{^useReflectionEqualsHashCode}}
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }{{#hasVars}}
+    {{classname}} {{classVarName}} = ({{classname}}) o;
+    return {{#vars}}{{#vendorExtensions.x-is-jackson-optional-nullable}}equalsNullable(this.{{name}}, {{classVarName}}.{{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^vendorExtensions.x-is-jackson-optional-nullable}}{{#isByteArray}}Arrays{{/isByteArray}}{{^isByteArray}}Objects{{/isByteArray}}.equals(this.{{name}}, {{classVarName}}.{{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^-last}} &&
+        {{/-last}}{{/vars}}{{#parent}} &&
+        super.equals(o){{/parent}};{{/hasVars}}{{^hasVars}}
+    return {{#parent}}super.equals(o){{/parent}}{{^parent}}true{{/parent}};{{/hasVars}}
+  {{/useReflectionEqualsHashCode}}
+  }{{#vendorExtensions.x-jackson-optional-nullable-helpers}}
+
+  private static <T> boolean equalsNullable(JsonNullable<T> a, JsonNullable<T> b) {
+    return a == b || (a != null && b != null && a.isPresent() && b.isPresent() && Objects.deepEquals(a.get(), b.get()));
+  }{{/vendorExtensions.x-jackson-optional-nullable-helpers}}
+
+  @Override
+  public int hashCode() {
+  {{#useReflectionEqualsHashCode}}
+    return HashCodeBuilder.reflectionHashCode(this);
+  {{/useReflectionEqualsHashCode}}
+  {{^useReflectionEqualsHashCode}}
+    return Objects.hash({{#vars}}{{#vendorExtensions.x-is-jackson-optional-nullable}}hashCodeNullable({{name}}){{/vendorExtensions.x-is-jackson-optional-nullable}}{{^vendorExtensions.x-is-jackson-optional-nullable}}{{^isByteArray}}{{name}}{{/isByteArray}}{{#isByteArray}}Arrays.hashCode({{name}}){{/isByteArray}}{{/vendorExtensions.x-is-jackson-optional-nullable}}{{^-last}}, {{/-last}}{{/vars}}{{#parent}}{{#hasVars}}, {{/hasVars}}super.hashCode(){{/parent}});
+  {{/useReflectionEqualsHashCode}}
+  }{{#vendorExtensions.x-jackson-optional-nullable-helpers}}
+
+  private static <T> int hashCodeNullable(JsonNullable<T> a) {
+    if (a == null) {
+      return 1;
+    }
+    return a.isPresent() ? Arrays.deepHashCode(new Object[]{a.get()}) : 31;
+  }{{/vendorExtensions.x-jackson-optional-nullable-helpers}}
+
+  /**
+   * Create a string representation of this pojo.
+   */
+  @Override
+  public String toString() {
+    StringBuilder sb = new StringBuilder();
+    sb.append("class {{classname}} {\n");
+    {{#parent}}sb.append("    ").append(toIndentedString(super.toString())).append("\n");{{/parent}}
+    {{#vars}}sb.append("    {{name}}: ").append({{#isPassword}}"*"{{/isPassword}}{{^isPassword}}toIndentedString({{name}}){{/isPassword}}).append("\n");
+    {{/vars}}sb.append("}");
+    return sb.toString();
+  }
+
+  /**
+   * Convert the given object to string with each line indented by 4 spaces
+   * (except the first line).
+   */
+  private static String toIndentedString(Object o) {
+    if (o == null) {
+      return "null";
+    }
+    return o.toString().replace("\n", "\n    ");
+  }
\ No newline at end of file
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom.mustache
index f814d4c0d90a..32f508679823 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom.mustache
@@ -196,6 +196,14 @@
         <version>${mutiny.version}</version>
     </dependency>
 {{/microprofileMutiny}}
+{{#useReflectionEqualsHashCode}}
+    <!-- For equals and hashCode using reflection -->
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>${commons.lang3.version}</version>
+    </dependency>
+{{/useReflectionEqualsHashCode}}
   </dependencies>
   <repositories>
     <repository>
@@ -210,6 +218,8 @@
     <java.version>1.8</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -238,9 +248,11 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 {{#microprofileMutiny}}
     <mutiny.version>1.2.0</mutiny.version>
 {{/microprofileMutiny}}
+{{#useReflectionEqualsHashCode}}
+    <commons.lang3.version>3.17.0</commons.lang3.version>
+{{/useReflectionEqualsHashCode}}
   </properties>
 </project>
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom_3.0.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom_3.0.mustache
index 7accc4cb28cd..084bc6aee215 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom_3.0.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/microprofile/pom_3.0.mustache
@@ -189,6 +189,14 @@
         <version>${jakarta.annotation.version}</version>
         <scope>provided</scope>
     </dependency>
+{{#useReflectionEqualsHashCode}}
+    <!-- For equals and hashCode using reflection -->
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>${commons.lang3.version}</version>
+    </dependency>
+{{/useReflectionEqualsHashCode}}
   </dependencies>
   <repositories>
     <repository>
@@ -203,6 +211,8 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -231,6 +241,8 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+{{#useReflectionEqualsHashCode}}
+    <commons.lang3.version>3.17.0</commons.lang3.version>
+{{/useReflectionEqualsHashCode}}
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/pom.xml b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/pom.xml
index d701aacddb76..d53697eb8f7c 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/pom.xml
@@ -152,6 +152,8 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -175,6 +177,5 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Category.java
index c798b428fe25..f90301183daa 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Category.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -101,6 +103,23 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index 7ea582a1bec1..334229b6626f 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -133,6 +135,24 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Order.java
index 20efbf432c47..14d273215c1b 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Order.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -265,6 +267,27 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Pet.java
index d07171344040..74cf6d7ec2ca 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Pet.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -293,6 +295,27 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Tag.java
index db5a74ca2be2..f74a6e14dcfa 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/Tag.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -101,6 +103,23 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/User.java
index 9856bbcead54..1d571783f608 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson-with-xml/src/main/java/org/openapitools/client/model/User.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -290,6 +292,29 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/pom.xml b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/pom.xml
index e9b263491fed..5fe978cf467e 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/pom.xml
@@ -127,6 +127,12 @@
         <version>${jakarta.annotation.version}</version>
         <scope>provided</scope>
     </dependency>
+    <!-- For equals and hashCode using reflection -->
+    <dependency>
+      <groupId>org.apache.commons</groupId>
+      <artifactId>commons-lang3</artifactId>
+      <version>${commons.lang3.version}</version>
+    </dependency>
   </dependencies>
   <repositories>
     <repository>
@@ -141,6 +147,8 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -164,6 +172,6 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <commons.lang3.version>3.17.0</commons.lang3.version>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Category.java
index e08314ab6827..0b66df25dc92 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Category.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -86,6 +90,15 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index 75df05dfaeff..b5436a50670b 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -116,6 +120,15 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Order.java
index eb683221585e..97e82f85b215 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Order.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -238,6 +242,15 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Pet.java
index 0e0720b77141..af204ae60757 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Pet.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -260,6 +264,15 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Tag.java
index b6f693497852..90220db69136 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/Tag.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -86,6 +90,15 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/User.java
index fda9ee53d143..555e1e3d2811 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0-jackson/src/main/java/org/openapitools/client/model/User.java
@@ -12,6 +12,10 @@
 
 package org.openapitools.client.model;
 
+import org.apache.commons.lang3.builder.EqualsBuilder;
+import org.apache.commons.lang3.builder.HashCodeBuilder;
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -263,6 +267,15 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    return EqualsBuilder.reflectionEquals(this, o, false, null, true);
+  }
+
+  @Override
+  public int hashCode() {
+    return HashCodeBuilder.reflectionHashCode(this);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/pom.xml b/samples/client/petstore/java/microprofile-rest-client-3.0/pom.xml
index a7f7382d9947..4a245c6749f7 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/pom.xml
@@ -150,6 +150,8 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -172,6 +174,5 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Category.java
index 121589eaeb6a..d7d5dca2bc60 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Category.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index c1df0dd408ae..2791024ba294 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -98,6 +100,24 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Order.java
index 489c7fc73c5f..d7e654ce3a9e 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Order.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.Date;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
@@ -213,6 +215,27 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Pet.java
index 5761ee105f1e..d2b51d9db1cb 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Pet.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -235,6 +237,27 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Tag.java
index 28985a1f069b..1317a25b1776 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/Tag.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/User.java
index d9ebaeb284dd..d717a4bd3219 100644
--- a/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/microprofile-rest-client-3.0/src/main/java/org/openapitools/client/model/User.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -216,6 +218,29 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-outer-enum/pom.xml b/samples/client/petstore/java/microprofile-rest-client-outer-enum/pom.xml
index 8d3d986ef9f1..d5fb59988d9a 100644
--- a/samples/client/petstore/java/microprofile-rest-client-outer-enum/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client-outer-enum/pom.xml
@@ -150,6 +150,8 @@
     <java.version>1.8</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -172,6 +174,5 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Cat.java b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Cat.java
index 6d04b341accf..1b03fa72cdd7 100644
--- a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Cat.java
+++ b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Cat.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import org.openapitools.client.model.Status;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
@@ -96,6 +98,24 @@ public Cat status(Status status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Cat cat = (Cat) o;
+    return Objects.equals(this.id, cat.id) &&
+        Objects.equals(this.name, cat.name) &&
+        Objects.equals(this.status, cat.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Dog.java b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Dog.java
index ae84137c036d..7eb427a23a31 100644
--- a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Dog.java
+++ b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Dog.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import org.openapitools.client.model.Status;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
@@ -96,6 +98,24 @@ public Dog status(Status status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Dog dog = (Dog) o;
+    return Objects.equals(this.id, dog.id) &&
+        Objects.equals(this.name, dog.name) &&
+        Objects.equals(this.status, dog.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Status.java b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Status.java
index ec5a12d0b531..7d56e2588283 100644
--- a/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Status.java
+++ b/samples/client/petstore/java/microprofile-rest-client-outer-enum/src/main/java/org/openapitools/client/model/Status.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
 import javax.json.bind.annotation.JsonbTypeSerializer;
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/pom.xml b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/pom.xml
index 650e0a1d3c47..3e687e538331 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/pom.xml
@@ -150,6 +150,8 @@
     <java.version>11</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -172,6 +174,5 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Category.java
index 121589eaeb6a..d7d5dca2bc60 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Category.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index c1df0dd408ae..2791024ba294 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -98,6 +100,24 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Order.java
index 489c7fc73c5f..d7e654ce3a9e 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Order.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.Date;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
@@ -213,6 +215,27 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Pet.java
index 5761ee105f1e..d2b51d9db1cb 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Pet.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -235,6 +237,27 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Tag.java
index 28985a1f069b..1317a25b1776 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/Tag.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/User.java
index d9ebaeb284dd..d717a4bd3219 100644
--- a/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/microprofile-rest-client-with-useSingleRequestParameter/src/main/java/org/openapitools/client/model/User.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import jakarta.json.bind.annotation.JsonbTypeDeserializer;
 import jakarta.json.bind.annotation.JsonbTypeSerializer;
@@ -216,6 +218,29 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/pom.xml b/samples/client/petstore/java/microprofile-rest-client/pom.xml
index 6b4d20cb600d..6dee8d3a89b6 100644
--- a/samples/client/petstore/java/microprofile-rest-client/pom.xml
+++ b/samples/client/petstore/java/microprofile-rest-client/pom.xml
@@ -150,6 +150,8 @@
     <java.version>1.8</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -172,6 +174,5 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 </project>
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Category.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Category.java
index 9b8e0cd72052..5a53099479ee 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Category.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Category.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
 import javax.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
index 6afa6830d98c..6926a2e2270f 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/ModelApiResponse.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
 import javax.json.bind.annotation.JsonbTypeSerializer;
@@ -98,6 +100,24 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Order.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Order.java
index a111215c674d..4f743c78a6c8 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Order.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Order.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.Date;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
@@ -213,6 +215,27 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Pet.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Pet.java
index 4da8d4dc7636..03b5f5cd88f6 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Pet.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Pet.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -235,6 +237,27 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Tag.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Tag.java
index 29afe967b747..5bb307506c92 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Tag.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/Tag.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
 import javax.json.bind.annotation.JsonbTypeSerializer;
@@ -75,6 +77,23 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/User.java b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/User.java
index 67aba438db6a..1542e3dfc587 100644
--- a/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/User.java
+++ b/samples/client/petstore/java/microprofile-rest-client/src/main/java/org/openapitools/client/model/User.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.client.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import java.lang.reflect.Type;
 import javax.json.bind.annotation.JsonbTypeDeserializer;
 import javax.json.bind.annotation.JsonbTypeSerializer;
@@ -216,6 +218,29 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/pom.xml b/samples/server/petstore/java-microprofile/pom.xml
index 21bc94702f22..5b215a1c4f1c 100644
--- a/samples/server/petstore/java-microprofile/pom.xml
+++ b/samples/server/petstore/java-microprofile/pom.xml
@@ -146,6 +146,8 @@
     <java.version>1.8</java.version>
     <maven.compiler.source>${java.version}</maven.compiler.source>
     <maven.compiler.target>${java.version}</maven.compiler.target>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+
     <swagger.core.version>1.5.18</swagger.core.version>
     <jetty.version>9.2.9.v20150224</jetty.version>
     <junit.version>5.10.2</junit.version>
@@ -169,7 +171,6 @@
     <jandex.maven.plugin.version>1.1.0</jandex.maven.plugin.version>
     <maven.failsafe.plugin.version>2.6</maven.failsafe.plugin.version>
     <build.helper.maven.plugin.version>1.9.1</build.helper.maven.plugin.version>
-    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <mutiny.version>1.2.0</mutiny.version>
   </properties>
 </project>
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Category.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Category.java
index 27b1cee8d497..3132b518447e 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Category.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Category.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -86,6 +88,23 @@ public Category name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Category category = (Category) o;
+    return Objects.equals(this.id, category.id) &&
+        Objects.equals(this.name, category.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/ModelApiResponse.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/ModelApiResponse.java
index 95ea601a2edc..4796b0ec36e5 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/ModelApiResponse.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/ModelApiResponse.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -116,6 +118,24 @@ public ModelApiResponse message(String message) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    ModelApiResponse _apiResponse = (ModelApiResponse) o;
+    return Objects.equals(this.code, _apiResponse.code) &&
+        Objects.equals(this.type, _apiResponse.type) &&
+        Objects.equals(this.message, _apiResponse.message);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(code, type, message);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Order.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Order.java
index 2a4482666e15..31031beb5379 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Order.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Order.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -238,6 +240,27 @@ public Order complete(Boolean complete) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Order order = (Order) o;
+    return Objects.equals(this.id, order.id) &&
+        Objects.equals(this.petId, order.petId) &&
+        Objects.equals(this.quantity, order.quantity) &&
+        Objects.equals(this.shipDate, order.shipDate) &&
+        Objects.equals(this.status, order.status) &&
+        Objects.equals(this.complete, order.complete);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, petId, quantity, shipDate, status, complete);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Pet.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Pet.java
index 881a1d6b5160..d1e447e3d9cd 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Pet.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Pet.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -260,6 +262,27 @@ public Pet status(StatusEnum status) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Pet pet = (Pet) o;
+    return Objects.equals(this.id, pet.id) &&
+        Objects.equals(this.category, pet.category) &&
+        Objects.equals(this.name, pet.name) &&
+        Objects.equals(this.photoUrls, pet.photoUrls) &&
+        Objects.equals(this.tags, pet.tags) &&
+        Objects.equals(this.status, pet.status);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, category, name, photoUrls, tags, status);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Tag.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Tag.java
index 662d5fbfa9cc..c78aac97c6cc 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Tag.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/Tag.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -86,6 +88,23 @@ public Tag name(String name) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    Tag tag = (Tag) o;
+    return Objects.equals(this.id, tag.id) &&
+        Objects.equals(this.name, tag.name);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, name);
+  }
 
   /**
    * Create a string representation of this pojo.
diff --git a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/User.java b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/User.java
index 85f009328506..7bd29b222e4e 100644
--- a/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/User.java
+++ b/samples/server/petstore/java-microprofile/src/main/java/org/openapitools/server/model/User.java
@@ -12,6 +12,8 @@
 
 package org.openapitools.server.model;
 
+import java.util.Objects;
+import java.util.Arrays;
 import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
@@ -263,6 +265,29 @@ public User userStatus(Integer userStatus) {
     return this;
   }
 
+  @Override
+  public boolean equals(Object o) {
+    if (this == o) {
+      return true;
+    }
+    if (o == null || getClass() != o.getClass()) {
+      return false;
+    }
+    User user = (User) o;
+    return Objects.equals(this.id, user.id) &&
+        Objects.equals(this.username, user.username) &&
+        Objects.equals(this.firstName, user.firstName) &&
+        Objects.equals(this.lastName, user.lastName) &&
+        Objects.equals(this.email, user.email) &&
+        Objects.equals(this.password, user.password) &&
+        Objects.equals(this.phone, user.phone) &&
+        Objects.equals(this.userStatus, user.userStatus);
+  }
+
+  @Override
+  public int hashCode() {
+    return Objects.hash(id, username, firstName, lastName, email, password, phone, userStatus);
+  }
 
   /**
    * Create a string representation of this pojo.