Revert https://codereview.chromium.org/1291903002 (protobuf roll).

third_party/protobuf/java/src/main/java/com/google/protobuf/AbstractMessage.java

Index: third_party/protobuf/java/src/main/java/com/google/protobuf/AbstractMessage.java
diff --git a/third_party/protobuf/java/src/main/java/com/google/protobuf/AbstractMessage.java b/third_party/protobuf/java/src/main/java/com/google/protobuf/AbstractMessage.java
deleted file mode 100644
index cc89173ab95b01908abfe2d12cf488fa89f0cc9c..0000000000000000000000000000000000000000
--- a/third_party/protobuf/java/src/main/java/com/google/protobuf/AbstractMessage.java
+++ /dev/null
@@ -1,524 +0,0 @@
-// Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// https://developers.google.com/protocol-buffers/
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-package com.google.protobuf;
-
-import com.google.protobuf.Descriptors.FieldDescriptor;
-import com.google.protobuf.Descriptors.OneofDescriptor;
-import com.google.protobuf.Internal.EnumLite;
-
-import java.io.IOException;
-import java.io.InputStream;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.List;
-import java.util.Map;
-
-/**
- * A partial implementation of the {@link Message} interface which implements
- * as many methods of that interface as possible in terms of other methods.
- *
- * @author kenton@google.com Kenton Varda
- */
-public abstract class AbstractMessage extends AbstractMessageLite
-                                      implements Message {
-  public boolean isInitialized() {
-    return MessageReflection.isInitialized(this);
-  }
-
-
-  public List<String> findInitializationErrors() {
-    return MessageReflection.findMissingFields(this);
-  }
-
-  public String getInitializationErrorString() {
-    return MessageReflection.delimitWithCommas(findInitializationErrors());
-  }
-
-  /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
-  @Override
-  public boolean hasOneof(OneofDescriptor oneof) {
-    throw new UnsupportedOperationException("hasOneof() is not implemented.");
-  }
-
-  /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
-  @Override
-  public FieldDescriptor getOneofFieldDescriptor(OneofDescriptor oneof) {
-    throw new UnsupportedOperationException(
-        "getOneofFieldDescriptor() is not implemented.");
-  }
-
-  @Override
-  public final String toString() {
-    return TextFormat.printToString(this);
-  }
-
-  public void writeTo(final CodedOutputStream output) throws IOException {
-    MessageReflection.writeMessageTo(this, getAllFields(), output, false);
-  }
-
-  protected int memoizedSize = -1;
-
-  public int getSerializedSize() {
-    int size = memoizedSize;
-    if (size != -1) {
-      return size;
-    }
-
-    memoizedSize = MessageReflection.getSerializedSize(this, getAllFields());
-    return memoizedSize;
-  }
-
-  @Override
-  public boolean equals(final Object other) {
-    if (other == this) {
-      return true;
-    }
-    if (!(other instanceof Message)) {
-      return false;
-    }
-    final Message otherMessage = (Message) other;
-    if (getDescriptorForType() != otherMessage.getDescriptorForType()) {
-      return false;
-    }
-    return compareFields(getAllFields(), otherMessage.getAllFields()) &&
-        getUnknownFields().equals(otherMessage.getUnknownFields());
-  }
-
-  @Override
-  public int hashCode() {
-    int hash = memoizedHashCode;
-    if (hash == 0) {
-      hash = 41;
-      hash = (19 * hash) + getDescriptorForType().hashCode();
-      hash = hashFields(hash, getAllFields());
-      hash = (29 * hash) + getUnknownFields().hashCode();
-      memoizedHashCode = hash;
-    }
-    return hash;
-  }
-  
-  private static ByteString toByteString(Object value) {
-    if (value instanceof byte[]) {
-      return ByteString.copyFrom((byte[]) value);
-    } else {
-      return (ByteString) value;
-    }
-  }
- 
-  /**
-   * Compares two bytes fields. The parameters must be either a byte array or a
-   * ByteString object. They can be of different type though.
-   */
-  private static boolean compareBytes(Object a, Object b) {
-    if (a instanceof byte[] && b instanceof byte[]) {
-      return Arrays.equals((byte[])a, (byte[])b);
-    }
-    return toByteString(a).equals(toByteString(b));
-  }
-  
-  /**
-   * Converts a list of MapEntry messages into a Map used for equals() and
-   * hashCode().
-   */
-  @SuppressWarnings({"rawtypes", "unchecked"})
-  private static Map convertMapEntryListToMap(List list) {
-    if (list.isEmpty()) {
-      return Collections.emptyMap();
-    }
-    Map result = new HashMap();
-    Iterator iterator = list.iterator();
-    Message entry = (Message) iterator.next();
-    Descriptors.Descriptor descriptor = entry.getDescriptorForType();
-    Descriptors.FieldDescriptor key = descriptor.findFieldByName("key");
-    Descriptors.FieldDescriptor value = descriptor.findFieldByName("value");
-    result.put(entry.getField(key), entry.getField(value));
-    while (iterator.hasNext()) {
-      entry = (Message) iterator.next();
-      result.put(entry.getField(key), entry.getField(value));
-    }
-    return result;
-  }
-  
-  /**
-   * Compares two map fields. The parameters must be a list of MapEntry
-   * messages.
-   */
-  @SuppressWarnings({"rawtypes", "unchecked"})
-  private static boolean compareMapField(Object a, Object b) {
-    Map ma = convertMapEntryListToMap((List) a);
-    Map mb = convertMapEntryListToMap((List) b);
-    return MapFieldLite.equals(ma, mb);
-  }
-  
-  /**
-   * Compares two set of fields.
-   * This method is used to implement {@link AbstractMessage#equals(Object)}
-   * and {@link AbstractMutableMessage#equals(Object)}. It takes special care
-   * of bytes fields because immutable messages and mutable messages use
-   * different Java type to reprensent a bytes field and this method should be
-   * able to compare immutable messages, mutable messages and also an immutable
-   * message to a mutable message.
-   */
-  static boolean compareFields(Map<FieldDescriptor, Object> a,
-      Map<FieldDescriptor, Object> b) {
-    if (a.size() != b.size()) {
-      return false;
-    }
-    for (FieldDescriptor descriptor : a.keySet()) {
-      if (!b.containsKey(descriptor)) {
-        return false;
-      }
-      Object value1 = a.get(descriptor);
-      Object value2 = b.get(descriptor);
-      if (descriptor.getType() == FieldDescriptor.Type.BYTES) {
-        if (descriptor.isRepeated()) {
-          List list1 = (List) value1;
-          List list2 = (List) value2;
-          if (list1.size() != list2.size()) {
-            return false;
-          }
-          for (int i = 0; i < list1.size(); i++) {
-            if (!compareBytes(list1.get(i), list2.get(i))) {
-              return false;
-            }
-          }
-        } else {
-          // Compares a singular bytes field.
-          if (!compareBytes(value1, value2)) {
-            return false;
-          }
-        }
-      } else if (descriptor.isMapField()) {
-        if (!compareMapField(value1, value2)) {
-          return false;
-        }
-      } else {
-        // Compare non-bytes fields.
-        if (!value1.equals(value2)) {
-          return false;
-        }
-      }
-    }
-    return true;
-  }
-  
-  /**
-   * Calculates the hash code of a map field. {@code value} must be a list of
-   * MapEntry messages.
-   */
-  @SuppressWarnings("unchecked")
-  private static int hashMapField(Object value) {
-    return MapFieldLite.calculateHashCodeForMap(convertMapEntryListToMap((List) value));
-  }
-
-  /** Get a hash code for given fields and values, using the given seed. */
-  @SuppressWarnings("unchecked")
-  protected static int hashFields(int hash, Map<FieldDescriptor, Object> map) {
-    for (Map.Entry<FieldDescriptor, Object> entry : map.entrySet()) {
-      FieldDescriptor field = entry.getKey();
-      Object value = entry.getValue();
-      hash = (37 * hash) + field.getNumber();
-      if (field.isMapField()) {
-        hash = (53 * hash) + hashMapField(value);
-      } else if (field.getType() != FieldDescriptor.Type.ENUM){
-        hash = (53 * hash) + value.hashCode();
-      } else if (field.isRepeated()) {
-        List<? extends EnumLite> list = (List<? extends EnumLite>) value;
-        hash = (53 * hash) + Internal.hashEnumList(list);
-      } else {
-        hash = (53 * hash) + Internal.hashEnum((EnumLite) value);
-      }
-    }
-    return hash;
-  }
-
-  /**
-   * Package private helper method for AbstractParser to create
-   * UninitializedMessageException with missing field information.
-   */
-  @Override
-  UninitializedMessageException newUninitializedMessageException() {
-    return Builder.newUninitializedMessageException(this);
-  }
-
-  // =================================================================
-
-  /**
-   * A partial implementation of the {@link Message.Builder} interface which
-   * implements as many methods of that interface as possible in terms of
-   * other methods.
-   */
-  @SuppressWarnings("unchecked")
-  public static abstract class Builder<BuilderType extends Builder>
-      extends AbstractMessageLite.Builder<BuilderType>
-      implements Message.Builder {
-    // The compiler produces an error if this is not declared explicitly.
-    @Override
-    public abstract BuilderType clone();
-
-    /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
-    @Override
-    public boolean hasOneof(OneofDescriptor oneof) {
-      throw new UnsupportedOperationException("hasOneof() is not implemented.");
-    }
-
-    /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
-    @Override
-    public FieldDescriptor getOneofFieldDescriptor(OneofDescriptor oneof) {
-      throw new UnsupportedOperationException(
-          "getOneofFieldDescriptor() is not implemented.");
-    }
-
-    /** TODO(jieluo): Clear it when all subclasses have implemented this method. */
-    @Override
-    public BuilderType clearOneof(OneofDescriptor oneof) {
-      throw new UnsupportedOperationException("clearOneof() is not implemented.");
-    }
-
-    public BuilderType clear() {
-      for (final Map.Entry<FieldDescriptor, Object> entry :
-           getAllFields().entrySet()) {
-        clearField(entry.getKey());
-      }
-      return (BuilderType) this;
-    }
-
-    public List<String> findInitializationErrors() {
-      return MessageReflection.findMissingFields(this);
-    }
-
-    public String getInitializationErrorString() {
-      return MessageReflection.delimitWithCommas(findInitializationErrors());
-    }
-
-    public BuilderType mergeFrom(final Message other) {
-      if (other.getDescriptorForType() != getDescriptorForType()) {
-        throw new IllegalArgumentException(
-          "mergeFrom(Message) can only merge messages of the same type.");
-      }
-
-      // Note:  We don't attempt to verify that other's fields have valid
-      //   types.  Doing so would be a losing battle.  We'd have to verify
-      //   all sub-messages as well, and we'd have to make copies of all of
-      //   them to insure that they don't change after verification (since
-      //   the Message interface itself cannot enforce immutability of
-      //   implementations).
-      // TODO(kenton):  Provide a function somewhere called makeDeepCopy()
-      //   which allows people to make secure deep copies of messages.
-
-      for (final Map.Entry<FieldDescriptor, Object> entry :
-           other.getAllFields().entrySet()) {
-        final FieldDescriptor field = entry.getKey();
-        if (field.isRepeated()) {
-          for (final Object element : (List)entry.getValue()) {
-            addRepeatedField(field, element);
-          }
-        } else if (field.getJavaType() == FieldDescriptor.JavaType.MESSAGE) {
-          final Message existingValue = (Message)getField(field);
-          if (existingValue == existingValue.getDefaultInstanceForType()) {
-            setField(field, entry.getValue());
-          } else {
-            setField(field,
-              existingValue.newBuilderForType()
-                .mergeFrom(existingValue)
-                .mergeFrom((Message)entry.getValue())
-                .build());
-          }
-        } else {
-          setField(field, entry.getValue());
-        }
-      }
-
-      mergeUnknownFields(other.getUnknownFields());
-
-      return (BuilderType) this;
-    }
-
-    @Override
-    public BuilderType mergeFrom(final CodedInputStream input)
-                                 throws IOException {
-      return mergeFrom(input, ExtensionRegistry.getEmptyRegistry());
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final CodedInputStream input,
-        final ExtensionRegistryLite extensionRegistry)
-        throws IOException {
-      final UnknownFieldSet.Builder unknownFields =
-        UnknownFieldSet.newBuilder(getUnknownFields());
-      while (true) {
-        final int tag = input.readTag();
-        if (tag == 0) {
-          break;
-        }
-
-        MessageReflection.BuilderAdapter builderAdapter =
-            new MessageReflection.BuilderAdapter(this);
-        if (!MessageReflection.mergeFieldFrom(input, unknownFields,
-                                              extensionRegistry,
-                                              getDescriptorForType(),
-                                              builderAdapter,
-                                              tag)) {
-          // end group tag
-          break;
-        }
-      }
-      setUnknownFields(unknownFields.build());
-      return (BuilderType) this;
-    }
-
-    public BuilderType mergeUnknownFields(final UnknownFieldSet unknownFields) {
-      setUnknownFields(
-        UnknownFieldSet.newBuilder(getUnknownFields())
-                       .mergeFrom(unknownFields)
-                       .build());
-      return (BuilderType) this;
-    }
-
-    public Message.Builder getFieldBuilder(final FieldDescriptor field) {
-      throw new UnsupportedOperationException(
-          "getFieldBuilder() called on an unsupported message type.");
-    }
-
-    public Message.Builder getRepeatedFieldBuilder(final FieldDescriptor field,
-        int index) {
-      throw new UnsupportedOperationException(
-          "getRepeatedFieldBuilder() called on an unsupported message type.");
-    }
-
-    public String toString() {
-      return TextFormat.printToString(this);
-    }
-
-    /**
-     * Construct an UninitializedMessageException reporting missing fields in
-     * the given message.
-     */
-    protected static UninitializedMessageException
-        newUninitializedMessageException(Message message) {
-      return new UninitializedMessageException(
-          MessageReflection.findMissingFields(message));
-    }
-
-    // ===============================================================
-    // The following definitions seem to be required in order to make javac
-    // not produce weird errors like:
-    //
-    // java/com/google/protobuf/DynamicMessage.java:203: types
-    //   com.google.protobuf.AbstractMessage.Builder<
-    //     com.google.protobuf.DynamicMessage.Builder> and
-    //   com.google.protobuf.AbstractMessage.Builder<
-    //     com.google.protobuf.DynamicMessage.Builder> are incompatible; both
-    //   define mergeFrom(com.google.protobuf.ByteString), but with unrelated
-    //   return types.
-    //
-    // Strangely, these lines are only needed if javac is invoked separately
-    // on AbstractMessage.java and AbstractMessageLite.java.  If javac is
-    // invoked on both simultaneously, it works.  (Or maybe the important
-    // point is whether or not DynamicMessage.java is compiled together with
-    // AbstractMessageLite.java -- not sure.)  I suspect this is a compiler
-    // bug.
-
-    @Override
-    public BuilderType mergeFrom(final ByteString data)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data);
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final ByteString data,
-        final ExtensionRegistryLite extensionRegistry)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data, extensionRegistry);
-    }
-
-    @Override
-    public BuilderType mergeFrom(final byte[] data)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data);
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final byte[] data, final int off, final int len)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data, off, len);
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final byte[] data,
-        final ExtensionRegistryLite extensionRegistry)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data, extensionRegistry);
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final byte[] data, final int off, final int len,
-        final ExtensionRegistryLite extensionRegistry)
-        throws InvalidProtocolBufferException {
-      return super.mergeFrom(data, off, len, extensionRegistry);
-    }
-
-    @Override
-    public BuilderType mergeFrom(final InputStream input)
-        throws IOException {
-      return super.mergeFrom(input);
-    }
-
-    @Override
-    public BuilderType mergeFrom(
-        final InputStream input,
-        final ExtensionRegistryLite extensionRegistry)
-        throws IOException {
-      return super.mergeFrom(input, extensionRegistry);
-    }
-
-    @Override
-    public boolean mergeDelimitedFrom(final InputStream input)
-        throws IOException {
-      return super.mergeDelimitedFrom(input);
-    }
-
-    @Override
-    public boolean mergeDelimitedFrom(
-        final InputStream input,
-        final ExtensionRegistryLite extensionRegistry)
-        throws IOException {
-      return super.mergeDelimitedFrom(input, extensionRegistry);
-    }
-  }
-}