chore(java): move Platform class to memory package (apache#1578)

## What does this PR do?

This PR moves Platform class to memory package, since it's most ly for
memory related operations


## Related issues



## Does this PR introduce any user-facing change?

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issue](https://github.com/apache/incubator-fury/issues/new/choose)
describing the need to do so and update the document if necessary.
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- [ ] Does this PR introduce any public API change?
- [ ] Does this PR introduce any binary protocol compatibility change?


## Benchmark

<!--
When the PR has an impact on performance (if you don't know whether the
PR will have an impact on performance, you can submit the PR first, and
if it will have impact on performance, the code reviewer will explain
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LICENSE

@@ -221,7 +221,7 @@ The text of each license is the standard Apache 2.0 license.
 * spark (https://github.com/apache/spark)
     Files:
       java/fury-core/src/main/java/org/apache/fury/codegen/Code.java
-      java/fury-core/src/main/java/org/apache/fury/util/Platform.java
+      java/fury-core/src/main/java/org/apache/fury/memory/Platform.java
       java/fury-format/src/main/java/org/apache/fury/format/vectorized/ArrowWriter.java
 
 * commons-io (https://github.com/apache/commons-io)

integration_tests/jdk_compatibility_tests/src/test/java/org/apache/fury/integration_tests/JDKCompatibilityTest.java

@@ -29,7 +29,7 @@
 import org.apache.fury.config.CompatibleMode;
 import org.apache.fury.config.FuryBuilder;
 import org.apache.fury.config.Language;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.testng.Assert;
 import org.testng.annotations.Test;
 

java/benchmark/src/main/java/org/apache/fury/benchmark/CompressStringSuite.java

@@ -21,8 +21,8 @@
 
 import java.nio.ByteBuffer;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.serializer.StringSerializer;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.StringUtils;
 import org.openjdk.jmh.Main;
 import org.openjdk.jmh.annotations.Benchmark;

java/benchmark/src/main/java/org/apache/fury/benchmark/Identity2IdMap.java

@@ -18,7 +18,7 @@
 
 import java.util.ArrayList;
 import java.util.List;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 
 // Drived from
 // https://github.com/RuedigerMoeller/fast-serialization/blob/e8da5591daa09452791dcd992ea4f83b20937be7/src/main/java/org/nustaq/serialization/util/FSTIdentity2IdMap.java.

java/benchmark/src/main/java/org/apache/fury/benchmark/MemorySuite.java

@@ -23,7 +23,7 @@
 import java.util.Random;
 import org.apache.fury.memory.MemoryBuffer;
 import org.apache.fury.memory.MemoryUtils;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.StringUtils;
 import org.openjdk.jmh.Main;
 import org.openjdk.jmh.annotations.BenchmarkMode;

java/benchmark/src/main/java/org/apache/fury/benchmark/NewJava11StringSuite.java

@@ -21,8 +21,8 @@
 
 import org.apache.fury.Fury;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.serializer.StringSerializer;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;

java/benchmark/src/main/java/org/apache/fury/benchmark/NewStringSuite.java

@@ -19,8 +19,8 @@
 
 package org.apache.fury.benchmark;
 
+import org.apache.fury.memory.Platform;
 import org.apache.fury.serializer.StringSerializer;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;
 import org.openjdk.jmh.Main;

java/benchmark/src/main/java/org/apache/fury/benchmark/UserTypeDeserializeSuite.java

@@ -30,7 +30,7 @@
 import org.apache.fury.benchmark.state.ObjectType;
 import org.apache.fury.benchmark.state.ProtoBuffersState;
 import org.apache.fury.benchmark.state.ProtostuffState;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.openjdk.jmh.Main;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;

java/benchmark/src/main/java/org/apache/fury/benchmark/UserTypeSerializeSuite.java

@@ -33,7 +33,7 @@
 import org.apache.fury.benchmark.state.ObjectType;
 import org.apache.fury.benchmark.state.ProtoBuffersState;
 import org.apache.fury.benchmark.state.ProtostuffState;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.openjdk.jmh.Main;
 import org.openjdk.jmh.annotations.Benchmark;
 import org.openjdk.jmh.annotations.BenchmarkMode;

java/benchmark/src/main/java/org/apache/fury/benchmark/ZeroCopySuite.java

@@ -43,9 +43,9 @@
 import org.apache.fury.config.Language;
 import org.apache.fury.memory.MemoryBuffer;
 import org.apache.fury.memory.MemoryUtils;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.serializer.BufferObject;
 import org.apache.fury.test.bean.ArraysData;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.nustaq.serialization.FSTConfiguration;
 import org.openjdk.jmh.Main;

java/benchmark/src/main/java/org/apache/fury/benchmark/state/FlatBuffersState.java

@@ -39,7 +39,7 @@
 import org.apache.fury.benchmark.state.generated.FBSMedia;
 import org.apache.fury.benchmark.state.generated.FBSMediaContent;
 import org.apache.fury.benchmark.state.generated.FBSSample;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.checkerframework.checker.nullness.qual.Nullable;
 import org.openjdk.jmh.annotations.Level;
 import org.openjdk.jmh.annotations.Param;

java/benchmark/src/main/java/org/apache/fury/benchmark/state/FstState.java

@@ -29,7 +29,7 @@
 import org.apache.fury.benchmark.data.Image;
 import org.apache.fury.benchmark.data.Media;
 import org.apache.fury.benchmark.data.MediaContent;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.Preconditions;
 import org.nustaq.serialization.FSTConfiguration;
 import org.openjdk.jmh.annotations.CompilerControl;

java/benchmark/src/main/java/org/apache/fury/benchmark/state/JsonbState.java

@@ -38,7 +38,7 @@
 import org.apache.fury.benchmark.data.CustomJDKSerialization;
 import org.apache.fury.logging.Logger;
 import org.apache.fury.logging.LoggerFactory;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.Preconditions;
 import org.openjdk.jmh.annotations.CompilerControl;
 import org.openjdk.jmh.annotations.Fork;

java/fury-core/src/main/java/org/apache/fury/Fury.java

@@ -43,6 +43,7 @@
 import org.apache.fury.logging.LoggerFactory;
 import org.apache.fury.memory.MemoryBuffer;
 import org.apache.fury.memory.MemoryUtils;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassInfoHolder;
 import org.apache.fury.resolver.ClassResolver;
@@ -62,7 +63,6 @@
 import org.apache.fury.type.Generics;
 import org.apache.fury.type.Type;
 import org.apache.fury.util.ExceptionUtils;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.StringUtils;
 

java/fury-core/src/main/java/org/apache/fury/builder/BaseObjectCodecBuilder.java

@@ -80,6 +80,7 @@
 import org.apache.fury.codegen.ExpressionVisitor.ExprHolder;
 import org.apache.fury.collection.Tuple2;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassInfoHolder;
 import org.apache.fury.resolver.ClassResolver;
@@ -95,7 +96,6 @@
 import org.apache.fury.serializer.collection.CollectionFlags;
 import org.apache.fury.type.TypeUtils;
 import org.apache.fury.util.GraalvmSupport;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;

java/fury-core/src/main/java/org/apache/fury/builder/CodecBuilder.java

@@ -55,12 +55,12 @@
 import org.apache.fury.codegen.Expression.StaticInvoke;
 import org.apache.fury.collection.Tuple2;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassInfoHolder;
 import org.apache.fury.type.Descriptor;
 import org.apache.fury.type.FinalObjectTypeStub;
 import org.apache.fury.util.GraalvmSupport;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;

java/fury-core/src/main/java/org/apache/fury/builder/CompatibleCodecBuilder.java

@@ -65,6 +65,7 @@
 import org.apache.fury.codegen.ExpressionOptimizer;
 import org.apache.fury.codegen.ExpressionUtils;
 import org.apache.fury.collection.Tuple2;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassResolver;
 import org.apache.fury.resolver.FieldResolver;
@@ -75,7 +76,6 @@
 import org.apache.fury.serializer.CompatibleSerializer;
 import org.apache.fury.type.Descriptor;
 import org.apache.fury.type.TypeUtils;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.function.SerializableSupplier;

java/fury-core/src/main/java/org/apache/fury/builder/JITContext.java

@@ -34,7 +34,7 @@
 import org.apache.fury.annotation.Internal;
 import org.apache.fury.codegen.CodeGenerator;
 import org.apache.fury.config.Config;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.Preconditions;
 
 /** A context for managing jit serialization code generation in async multithreaded environment. */

java/fury-core/src/main/java/org/apache/fury/builder/ObjectCodecBuilder.java

@@ -56,11 +56,11 @@
 import org.apache.fury.codegen.Expression.ReplaceStub;
 import org.apache.fury.codegen.Expression.StaticInvoke;
 import org.apache.fury.codegen.ExpressionVisitor;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.serializer.ObjectSerializer;
 import org.apache.fury.serializer.PrimitiveSerializers.LongSerializer;
 import org.apache.fury.type.Descriptor;
 import org.apache.fury.type.DescriptorGrouper;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.function.SerializableSupplier;
 import org.apache.fury.util.record.RecordUtils;

java/fury-core/src/main/java/org/apache/fury/codegen/Expression.java

@@ -56,8 +56,8 @@
 import java.util.List;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.type.TypeUtils;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;

java/fury-core/src/main/java/org/apache/fury/codegen/ExpressionVisitor.java

@@ -34,8 +34,8 @@
 import java.util.function.Function;
 import org.apache.fury.codegen.Expression.ListExpression;
 import org.apache.fury.codegen.Expression.Reference;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.type.TypeUtils;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 

java/fury-core/src/main/java/org/apache/fury/config/FuryBuilder.java

@@ -26,6 +26,7 @@
 import org.apache.fury.ThreadSafeFury;
 import org.apache.fury.logging.Logger;
 import org.apache.fury.logging.LoggerFactory;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.pool.ThreadPoolFury;
 import org.apache.fury.resolver.ClassResolver;
 import org.apache.fury.serializer.JavaSerializer;
@@ -34,7 +35,6 @@
 import org.apache.fury.serializer.TimeSerializers;
 import org.apache.fury.serializer.collection.GuavaCollectionSerializers;
 import org.apache.fury.util.GraalvmSupport;
-import org.apache.fury.util.Platform;
 
 /** Builder class to config and create {@link Fury}. */
 // Method naming style for this builder:

java/fury-core/src/main/java/org/apache/fury/io/FuryInputStream.java

@@ -24,7 +24,7 @@
 import java.nio.ByteBuffer;
 import javax.annotation.concurrent.NotThreadSafe;
 import org.apache.fury.memory.MemoryBuffer;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 
 /**
  * A buffered stream by fury. Do not use original {@link InputStream} when this stream object

java/fury-core/src/main/java/org/apache/fury/io/FuryReadableChannel.java

@@ -25,7 +25,7 @@
 import javax.annotation.concurrent.NotThreadSafe;
 import org.apache.fury.exception.DeserializationException;
 import org.apache.fury.memory.MemoryBuffer;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.Preconditions;
 
 @NotThreadSafe

java/fury-core/src/main/java/org/apache/fury/memory/LittleEndian.java

@@ -19,8 +19,6 @@
  * under the License.
  */
 
-import org.apache.fury.util.Platform;
-
 public class LittleEndian {
   public static int putVarUint36Small(byte[] arr, int index, long v) {
     if (v >>> 7 == 0) {

java/fury-core/src/main/java/org/apache/fury/memory/MemoryBuffer.java

@@ -26,7 +26,6 @@
 import org.apache.fury.annotation.CodegenInvoke;
 import org.apache.fury.io.AbstractStreamReader;
 import org.apache.fury.io.FuryStreamReader;
-import org.apache.fury.util.Platform;
 import sun.misc.Unsafe;
 
 /**

java/fury-core/src/main/java/org/apache/fury/memory/MemoryUtils.java

@@ -22,7 +22,6 @@
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.nio.ByteBuffer;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 
 /** Memory utils for fury. */

java/fury-core/src/main/java/org/apache/fury/util/Platform.java → java/fury-core/src/main/java/org/apache/fury/memory/Platform.java

@@ -15,13 +15,14 @@
  * limitations under the License.
  */
 
-package org.apache.fury.util;
+package org.apache.fury.memory;
 
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
 import java.nio.Buffer;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
+import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.unsafe._JDKAccess;
 import sun.misc.Unsafe;
 

java/fury-core/src/main/java/org/apache/fury/meta/ClassDef.java

@@ -46,14 +46,14 @@
 import org.apache.fury.logging.LoggerFactory;
 import org.apache.fury.memory.MemoryBuffer;
 import org.apache.fury.memory.MemoryUtils;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassResolver;
 import org.apache.fury.serializer.CompatibleSerializer;
 import org.apache.fury.type.Descriptor;
 import org.apache.fury.type.DescriptorGrouper;
 import org.apache.fury.type.FinalObjectTypeStub;
 import org.apache.fury.type.GenericType;
 import org.apache.fury.util.MurmurHash3;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 

java/fury-core/src/main/java/org/apache/fury/resolver/ClassResolver.java

@@ -96,6 +96,7 @@
 import org.apache.fury.logging.Logger;
 import org.apache.fury.logging.LoggerFactory;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.meta.ClassDef;
 import org.apache.fury.meta.MetaString;
 import org.apache.fury.serializer.ArraySerializers;
@@ -145,7 +146,6 @@
 import org.apache.fury.type.ScalaTypes;
 import org.apache.fury.type.TypeUtils;
 import org.apache.fury.util.GraalvmSupport;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.StringUtils;

java/fury-core/src/main/java/org/apache/fury/serializer/ArraySerializers.java

@@ -23,6 +23,7 @@
 import java.util.IdentityHashMap;
 import org.apache.fury.Fury;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassInfoHolder;
 import org.apache.fury.resolver.ClassResolver;
@@ -31,7 +32,6 @@
 import org.apache.fury.serializer.collection.FuryArrayAsListSerializer;
 import org.apache.fury.type.Type;
 import org.apache.fury.type.TypeUtils;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 

java/fury-core/src/main/java/org/apache/fury/serializer/CompatibleSerializer.java

@@ -27,14 +27,14 @@
 import java.util.stream.Collectors;
 import org.apache.fury.Fury;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassInfo;
 import org.apache.fury.resolver.ClassResolver;
 import org.apache.fury.resolver.FieldResolver;
 import org.apache.fury.resolver.RefResolver;
 import org.apache.fury.serializer.collection.CollectionSerializer;
 import org.apache.fury.serializer.collection.MapSerializer;
 import org.apache.fury.util.FieldAccessor;
-import org.apache.fury.util.Platform;
 import org.apache.fury.util.Preconditions;
 import org.apache.fury.util.ReflectionUtils;
 import org.apache.fury.util.record.RecordInfo;

java/fury-core/src/main/java/org/apache/fury/serializer/ExternalizableSerializer.java

@@ -26,7 +26,7 @@
 import org.apache.fury.io.MemoryBufferObjectInput;
 import org.apache.fury.io.MemoryBufferObjectOutput;
 import org.apache.fury.memory.MemoryBuffer;
-import org.apache.fury.util.Platform;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.ReflectionUtils;
 
 /** Serializer for class implements {@link Externalizable}. */

java/fury-core/src/main/java/org/apache/fury/serializer/ForwardSerializer.java

@@ -29,9 +29,9 @@
 import org.apache.fury.config.Language;
 import org.apache.fury.memory.MemoryBuffer;
 import org.apache.fury.memory.MemoryUtils;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.util.LoaderBinding;
 import org.apache.fury.util.LoaderBinding.StagingType;
-import org.apache.fury.util.Platform;
 
 /**
  * A thread-safe serializer used to forward serialization to different serializer implementation.

java/fury-core/src/main/java/org/apache/fury/serializer/JavaSerializer.java

@@ -36,8 +36,8 @@
 import org.apache.fury.logging.LoggerFactory;
 import org.apache.fury.memory.BigEndian;
 import org.apache.fury.memory.MemoryBuffer;
+import org.apache.fury.memory.Platform;
 import org.apache.fury.resolver.ClassResolver;
-import org.apache.fury.util.Platform;
 
 /**
  * Serializes objects using Java's built in serialization to be compatible with java serialization.