AbstractParser.java

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// 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.AbstractMessageLite.Builder.LimitedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
 
public abstract class AbstractParser<MessageType extends MessageLite>
    implements Parser<MessageType> {
  private UninitializedMessageException newUninitializedMessageException(MessageType message) {
    if (message instanceof AbstractMessageLite) {
      return ((AbstractMessageLite) message).newUninitializedMessageException();
    }
    return new UninitializedMessageException(message);
  }
 
  private MessageType checkMessageInitialized(MessageType message)
      throws InvalidProtocolBufferException {
    if (message != null && !message.isInitialized()) {
      throw newUninitializedMessageException(message)
          .asInvalidProtocolBufferException()
          .setUnfinishedMessage(message);
    }
    return message;
  }
 
  private static final ExtensionRegistryLite EMPTY_REGISTRY =
      ExtensionRegistryLite.getEmptyRegistry();
 
  @Override
  public MessageType parsePartialFrom(CodedInputStream input)
      throws InvalidProtocolBufferException {
    return parsePartialFrom(input, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(CodedInputStream input, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return checkMessageInitialized(parsePartialFrom(input, extensionRegistry));
  }
 
  @Override
  public MessageType parseFrom(CodedInputStream input) throws InvalidProtocolBufferException {
    return parseFrom(input, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parsePartialFrom(ByteString data, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    MessageType message;
    try {
      CodedInputStream input = data.newCodedInput();
      message = parsePartialFrom(input, extensionRegistry);
      try {
        input.checkLastTagWas(0);
      } catch (InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(message);
      }
      return message;
    } catch (InvalidProtocolBufferException e) {
      throw e;
    }
  }
 
  @Override
  public MessageType parsePartialFrom(ByteString data) throws InvalidProtocolBufferException {
    return parsePartialFrom(data, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(ByteString data, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return checkMessageInitialized(parsePartialFrom(data, extensionRegistry));
  }
 
  @Override
  public MessageType parseFrom(ByteString data) throws InvalidProtocolBufferException {
    return parseFrom(data, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(ByteBuffer data, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    MessageType message;
    try {
      CodedInputStream input = CodedInputStream.newInstance(data);
      message = parsePartialFrom(input, extensionRegistry);
      try {
        input.checkLastTagWas(0);
      } catch (InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(message);
      }
    } catch (InvalidProtocolBufferException e) {
      throw e;
    }
 
    return checkMessageInitialized(message);
  }
 
  @Override
  public MessageType parseFrom(ByteBuffer data) throws InvalidProtocolBufferException {
    return parseFrom(data, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parsePartialFrom(
      byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    try {
      CodedInputStream input = CodedInputStream.newInstance(data, off, len);
      MessageType message = parsePartialFrom(input, extensionRegistry);
      try {
        input.checkLastTagWas(0);
      } catch (InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(message);
      }
      return message;
    } catch (InvalidProtocolBufferException e) {
      throw e;
    }
  }
 
  @Override
  public MessageType parsePartialFrom(byte[] data, int off, int len)
      throws InvalidProtocolBufferException {
    return parsePartialFrom(data, off, len, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parsePartialFrom(byte[] data, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return parsePartialFrom(data, 0, data.length, extensionRegistry);
  }
 
  @Override
  public MessageType parsePartialFrom(byte[] data) throws InvalidProtocolBufferException {
    return parsePartialFrom(data, 0, data.length, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(
      byte[] data, int off, int len, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return checkMessageInitialized(parsePartialFrom(data, off, len, extensionRegistry));
  }
 
  @Override
  public MessageType parseFrom(byte[] data, int off, int len)
      throws InvalidProtocolBufferException {
    return parseFrom(data, off, len, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(byte[] data, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return parseFrom(data, 0, data.length, extensionRegistry);
  }
 
  @Override
  public MessageType parseFrom(byte[] data) throws InvalidProtocolBufferException {
    return parseFrom(data, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parsePartialFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    CodedInputStream codedInput = CodedInputStream.newInstance(input);
    MessageType message = parsePartialFrom(codedInput, extensionRegistry);
    try {
      codedInput.checkLastTagWas(0);
    } catch (InvalidProtocolBufferException e) {
      throw e.setUnfinishedMessage(message);
    }
    return message;
  }
 
  @Override
  public MessageType parsePartialFrom(InputStream input) throws InvalidProtocolBufferException {
    return parsePartialFrom(input, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return checkMessageInitialized(parsePartialFrom(input, extensionRegistry));
  }
 
  @Override
  public MessageType parseFrom(InputStream input) throws InvalidProtocolBufferException {
    return parseFrom(input, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parsePartialDelimitedFrom(
      InputStream input, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    int size;
    try {
      int firstByte = input.read();
      if (firstByte == -1) {
        return null;
      }
      size = CodedInputStream.readRawVarint32(firstByte, input);
    } catch (IOException e) {
      throw new InvalidProtocolBufferException(e);
    }
    InputStream limitedInput = new LimitedInputStream(input, size);
    return parsePartialFrom(limitedInput, extensionRegistry);
  }
 
  @Override
  public MessageType parsePartialDelimitedFrom(InputStream input)
      throws InvalidProtocolBufferException {
    return parsePartialDelimitedFrom(input, EMPTY_REGISTRY);
  }
 
  @Override
  public MessageType parseDelimitedFrom(InputStream input, ExtensionRegistryLite extensionRegistry)
      throws InvalidProtocolBufferException {
    return checkMessageInitialized(parsePartialDelimitedFrom(input, extensionRegistry));
  }
 
  @Override
  public MessageType parseDelimitedFrom(InputStream input) throws InvalidProtocolBufferException {
    return parseDelimitedFrom(input, EMPTY_REGISTRY);
  }
}