content: /**
   * 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.activemq.openwire;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  import java.nio.ByteBuffer;
  
  public final class BooleanStream {
  
      byte data[] = new byte[48];
      short arrayLimit;
      short arrayPos;
      byte bytePos;
  
      public boolean readBoolean() throws IOException {
          assert arrayPos <= arrayLimit;
          byte b = data[arrayPos];
          boolean rc = ((b >> bytePos) & 0x01) != 0;
          bytePos++;
          if (bytePos >= 8) {
              bytePos = 0;
              arrayPos++;
          }
          return rc;
      }
  
      public void writeBoolean(boolean value) throws IOException {
          if (bytePos == 0) {
              arrayLimit++;
              if (arrayLimit >= data.length) {
                  // re-grow the array.
                  byte d[] = new byte[data.length * 2];
                  System.arraycopy(data, 0, d, 0, data.length);
                  data = d;
              }
          }
          if (value) {
              data[arrayPos] |= 0x01 << bytePos;
          }
          bytePos++;
          if (bytePos >= 8) {
              bytePos = 0;
              arrayPos++;
          }
      }
  
      public void marshal(DataOutput dataOut) throws IOException {
          if (arrayLimit < 64) {
              dataOut.writeByte(arrayLimit);
          } else if (arrayLimit < 256) { // max value of unsigned byte
              dataOut.writeByte(0xC0);
              dataOut.writeByte(arrayLimit);
          } else {
              dataOut.writeByte(0x80);
              dataOut.writeShort(arrayLimit);
          }
  
          dataOut.write(data, 0, arrayLimit);
          clear();
      }
  
      public void marshal(ByteBuffer dataOut) {
          if (arrayLimit < 64) {
              dataOut.put((byte)arrayLimit);
          } else if (arrayLimit < 256) { // max value of unsigned byte
              dataOut.put((byte)0xC0);
              dataOut.put((byte)arrayLimit);
          } else {
              dataOut.put((byte)0x80);
              dataOut.putShort(arrayLimit);
          }
  
          dataOut.put(data, 0, arrayLimit);
      }
  
      public void unmarshal(DataInput dataIn) throws IOException {
  
          arrayLimit = (short)(dataIn.readByte() & 0xFF);
          if (arrayLimit == 0xC0) {
              arrayLimit = (short)(dataIn.readByte() & 0xFF);
          } else if (arrayLimit == 0x80) {
              arrayLimit = dataIn.readShort();
          }
          if (data.length < arrayLimit) {
              data = new byte[arrayLimit];
          }
          dataIn.readFully(data, 0, arrayLimit);
          clear();
      }
  
      public void clear() {
          arrayPos = 0;
          bytePos = 0;
      }
  
      public int marshalledSize() {
          if (arrayLimit < 64) {
              return 1 + arrayLimit;
          } else if (arrayLimit < 256) {
              return 2 + arrayLimit;
          } else {
              return 3 + arrayLimit;
          }
      }
  
  }
  