Core: Add a util to read and write partition stats

CONTRIBUTING.md

@@ -72,7 +72,6 @@ __Modules__
 `iceberg-core`
 `iceberg-data`
 `iceberg-orc`
-`iceberg-parquet`
 
 Changes to public interfaces and classes in the subprojects listed above require a deprecation cycle of one minor
 release.  These projects contain common and internal code used by other projects and can evolve within a major release.

README.md

@@ -65,7 +65,6 @@ Iceberg table support is organized in library modules:
 * `iceberg-common` contains utility classes used in other modules
 * `iceberg-api` contains the public Iceberg API
 * `iceberg-core` contains implementations of the Iceberg API and support for Avro data files, **this is what processing engines should depend on**
-* `iceberg-parquet` is an optional module for working with tables backed by Parquet files
 * `iceberg-arrow` is an optional module for reading Parquet into Arrow memory
 * `iceberg-orc` is an optional module for working with tables backed by ORC files
 * `iceberg-hive-metastore` is an implementation of Iceberg tables backed by the Hive metastore Thrift client

api/src/test/java/org/apache/iceberg/TestHelpers.java

@@ -46,6 +46,7 @@
 import org.apache.iceberg.expressions.UnboundPredicate;
 import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
 import org.apache.iceberg.util.ByteBuffers;
+import org.assertj.core.api.AbstractThrowableAssert;
 import org.assertj.core.api.Assertions;
 import org.objenesis.strategy.StdInstantiatorStrategy;
 
@@ -265,6 +266,18 @@ public static void serialize(final Serializable obj, final OutputStream outputSt
     }
   }
 
+  public static void assertThrows(
+      String message,
+      Class<? extends Exception> expected,
+      String containedInMessage,
+      Runnable runnable) {
+    AbstractThrowableAssert<?, ? extends Throwable> check =
+        Assertions.assertThatThrownBy(runnable::run).as(message).isInstanceOf(expected);
+    if (null != containedInMessage) {
+      check.hasMessageContaining(containedInMessage);
+    }
+  }
+
   public static class KryoHelpers {
     private KryoHelpers() {}
 

build.gradle

@@ -114,7 +114,7 @@ if (file("${rootDir}/iceberg-build.properties").exists()) {
 }
 
 def projectVersion = getProjectVersion()
-final REVAPI_PROJECTS = ["iceberg-api", "iceberg-core", "iceberg-parquet", "iceberg-orc", "iceberg-common", "iceberg-data"]
+final REVAPI_PROJECTS = ["iceberg-api", "iceberg-core", "iceberg-orc", "iceberg-common", "iceberg-data"]
 
 allprojects {
   group = "org.apache.iceberg"
@@ -349,6 +349,13 @@ project(':iceberg-core') {
       exclude group: 'org.slf4j', module: 'slf4j-log4j12'
     }
 
+    implementation(libs.parquet.avro) {
+      exclude group: 'org.apache.avro', module: 'avro'
+      // already shaded by Parquet
+      exclude group: 'it.unimi.dsi'
+      exclude group: 'org.codehaus.jackson'
+    }
+
     testImplementation libs.jetty.servlet
     testImplementation libs.jetty.server
     testImplementation libs.mockserver.netty
@@ -366,7 +373,6 @@ project(':iceberg-data') {
     implementation project(path: ':iceberg-bundled-guava', configuration: 'shadow')
     api project(':iceberg-api')
     implementation project(':iceberg-core')
-    compileOnly project(':iceberg-parquet')
     compileOnly project(':iceberg-orc')
     compileOnly(libs.hadoop2.common) {
       exclude group: 'commons-beanutils'
@@ -555,7 +561,6 @@ project(':iceberg-delta-lake') {
     api project(':iceberg-api')
     implementation project(':iceberg-common')
     implementation project(':iceberg-core')
-    implementation project(':iceberg-parquet')
     implementation platform(libs.jackson.bom)
     implementation "com.fasterxml.jackson.core:jackson-databind"
     annotationProcessor libs.immutables.value
@@ -761,32 +766,6 @@ project(':iceberg-orc') {
   }
 }
 
-project(':iceberg-parquet') {
-  test {
-    useJUnitPlatform()
-  }
-  dependencies {
-    implementation project(path: ':iceberg-bundled-guava', configuration: 'shadow')
-    api project(':iceberg-api')
-    implementation project(':iceberg-core')
-    implementation project(':iceberg-common')
-
-    implementation(libs.parquet.avro) {
-      exclude group: 'org.apache.avro', module: 'avro'
-      // already shaded by Parquet
-      exclude group: 'it.unimi.dsi'
-      exclude group: 'org.codehaus.jackson'
-    }
-
-    compileOnly libs.avro.avro
-    compileOnly(libs.hadoop2.client) {
-      exclude group: 'org.apache.avro', module: 'avro'
-    }
-
-    testImplementation project(path: ':iceberg-core', configuration: 'testArtifacts')
-  }
-}
-
 project(':iceberg-arrow') {
   test {
     useJUnitPlatform()
@@ -795,7 +774,6 @@ project(':iceberg-arrow') {
     implementation project(path: ':iceberg-bundled-guava', configuration: 'shadow')
     api project(':iceberg-api')
     implementation project(':iceberg-core')
-    implementation project(':iceberg-parquet')
 
     implementation(libs.arrow.vector) {
       exclude group: 'io.netty', module: 'netty-buffer'
@@ -837,7 +815,6 @@ project(':iceberg-pig') {
     api project(':iceberg-api')
     implementation project(':iceberg-common')
     implementation project(':iceberg-core')
-    implementation project(':iceberg-parquet')
 
     implementation(libs.parquet.avro) {
       exclude group: 'org.apache.avro', module: 'avro'