GH-10083: Apply Nullability to R2DBC module

Related to: #10083

Signed-off-by: Jiandong Ma <[email protected]>

Author: mjd507

spring-integration-r2dbc/src/main/java/org/springframework/integration/r2dbc/dsl/package-info.java

@@ -1,6 +1,5 @@
 /**
  * Provides classes for supporting Java DSL for R2DBC components.
  */
-@org.springframework.lang.NonNullApi
-@org.springframework.lang.NonNullFields
+@org.jspecify.annotations.NullMarked
 package org.springframework.integration.r2dbc.dsl;

spring-integration-r2dbc/src/main/java/org/springframework/integration/r2dbc/inbound/R2dbcMessageSource.java

@@ -22,6 +22,7 @@
 
 import io.r2dbc.spi.Row;
 import io.r2dbc.spi.RowMetadata;
+import org.jspecify.annotations.Nullable;
 import org.reactivestreams.Publisher;
 import reactor.core.publisher.Mono;
 
@@ -34,7 +35,6 @@
 import org.springframework.expression.spel.support.StandardEvaluationContext;
 import org.springframework.integration.endpoint.AbstractMessageSource;
 import org.springframework.integration.expression.ExpressionUtils;
-import org.springframework.lang.Nullable;
 import org.springframework.r2dbc.core.ColumnMapRowMapper;
 import org.springframework.r2dbc.core.DatabaseClient;
 import org.springframework.r2dbc.core.RowsFetchSpec;

spring-integration-r2dbc/src/main/java/org/springframework/integration/r2dbc/inbound/package-info.java

@@ -1,6 +1,5 @@
 /**
  * Provides classes for supporting R2DBC inbound components.
  */
-@org.springframework.lang.NonNullApi
-@org.springframework.lang.NonNullFields
+@org.jspecify.annotations.NullMarked
 package org.springframework.integration.r2dbc.inbound;

spring-integration-r2dbc/src/main/java/org/springframework/integration/r2dbc/outbound/R2dbcMessageHandler.java

@@ -19,6 +19,7 @@
 import java.util.HashMap;
 import java.util.Map;
 
+import org.jspecify.annotations.Nullable;
 import reactor.core.publisher.Mono;
 
 import org.springframework.data.r2dbc.core.R2dbcEntityOperations;
@@ -34,7 +35,6 @@
 import org.springframework.integration.expression.ExpressionUtils;
 import org.springframework.integration.expression.ValueExpression;
 import org.springframework.integration.handler.AbstractReactiveMessageHandler;
-import org.springframework.lang.Nullable;
 import org.springframework.messaging.Message;
 import org.springframework.r2dbc.core.Parameter;
 import org.springframework.r2dbc.core.PreparedOperation;

spring-integration-r2dbc/src/main/java/org/springframework/integration/r2dbc/outbound/package-info.java

@@ -1,6 +1,5 @@
 /**
  * Provides classes for supporting R2DBC outbound components.
  */
-@org.springframework.lang.NonNullApi
-@org.springframework.lang.NonNullFields
+@org.jspecify.annotations.NullMarked
 package org.springframework.integration.r2dbc.outbound;