content: /*
   *  Copyright Beijing 58 Information Technology Co.,Ltd.
   *
   *  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 com.bj58.spat.gaea.serializer.component;
  
  import com.bj58.spat.gaea.serializer.component.helper.ByteHelper;
  
  import java.io.ByteArrayOutputStream;
  import java.nio.charset.Charset;
  import java.io.IOException;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * GaeaOutStream
   * 
   * @author Service Platform Architecture Team (spat@58.com)
   */
  public class GaeaOutStream extends ByteArrayOutputStream {
  
      public Charset Encoder = Charset.forName("UTF-8");
      private Map<Integer, Object> _RefPool = new HashMap<Integer, Object>();
  
      public boolean WriteRef(Object obj) throws IOException {
          if (obj == null) {
              this.WriteByte((byte) 1);
              this.WriteInt32((int) 0);
              return true;
          }
          int objHashcode = getHashCode(obj);
          if (_RefPool.containsKey(objHashcode)) {
              WriteByte((byte) 1);
              WriteInt32(objHashcode);
              return true;
          } else {
              _RefPool.put(objHashcode, obj);
              WriteByte((byte) 0);
              WriteInt32(objHashcode);
              return false;
          }
      }
  
      public void WriteByte(byte value) throws IOException {
          this.write(new byte[]{value});
      }
  
      public void WriteInt16(short value) throws IOException {
          byte[] buffer = ByteHelper.GetBytesFromInt16(value);
          this.write(buffer);
      }
  
      public void WriteInt32(int value) throws IOException {
          byte[] buffer = ByteHelper.GetBytesFromInt32(value);
          this.write(buffer);
      }
  
      public void WriteInt64(long value) throws IOException {
          byte[] buffer = ByteHelper.GetBytesFromInt64(value);
          this.write(buffer);
      }
      
      private int hashCode = 1000;
      private Map<Object, Integer> _objMap = new HashMap<Object, Integer>();
      
      private int getHashCode(Object obj) {
      	if (obj == null) {
              return 0;
          }
          if (_objMap.containsKey(obj) && obj == _objMap.get(obj)) {
          	return _objMap.get(obj);
          } else {
          	_objMap.put(obj, ++hashCode);
              return hashCode;
          }
      }
  }
  