/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.yarn.server.api.records.impl.pb;

import java.nio.ByteBuffer;

import org.apache.hadoop.yarn.api.records.impl.pb.ProtoBase;
import org.apache.hadoop.yarn.proto.YarnServerCommonProtos.MasterKeyProto;
import org.apache.hadoop.yarn.proto.YarnServerCommonProtos.MasterKeyProtoOrBuilder;
import org.apache.hadoop.yarn.server.api.records.MasterKey;

public class MasterKeyPBImpl extends ProtoBase<MasterKeyProto> implements
    MasterKey {
  MasterKeyProto proto = MasterKeyProto.getDefaultInstance();
  MasterKeyProto.Builder builder = null;
  boolean viaProto = false;
  
  public MasterKeyPBImpl() {
    builder = MasterKeyProto.newBuilder();
  }

  public MasterKeyPBImpl(MasterKeyProto proto) {
    this.proto = proto;
    viaProto = true;
  }

  public synchronized MasterKeyProto getProto() {
    proto = viaProto ? proto : builder.build();
    viaProto = true;
    return proto;
  }

  private synchronized void maybeInitBuilder() {
    if (viaProto || builder == null) {
      builder = MasterKeyProto.newBuilder(proto);
    }
    viaProto = false;
  }

  @Override
  public synchronized int getKeyId() {
    MasterKeyProtoOrBuilder p = viaProto ? proto : builder;
    return (p.getKeyId());
  }

  @Override
  public synchronized void setKeyId(int id) {
    maybeInitBuilder();
    builder.setKeyId((id));
  }

  @Override
  public synchronized ByteBuffer getBytes() {
    MasterKeyProtoOrBuilder p = viaProto ? proto : builder;
    return convertFromProtoFormat(p.getBytes());
  }

  @Override
  public synchronized void setBytes(ByteBuffer bytes) {
    maybeInitBuilder();
    builder.setBytes(convertToProtoFormat(bytes));
  }

  @Override
  public int hashCode() {
    return getKeyId();
  }

  @Override
  public boolean equals(Object obj) {
    if (this == obj)
      return true;
    if (!(obj instanceof MasterKey)) {
      return false;
    }
    MasterKey other = (MasterKey) obj;
    if (this.getKeyId() != other.getKeyId()) {
      return false;
    }
    if (!this.getBytes().equals(other.getBytes())) {
      return false;
    }
    return true;
  }

}