//
   //  ========================================================================
   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
   //  ------------------------------------------------------------------------
   //  All rights reserved. This program and the accompanying materials
   //  are made available under the terms of the Eclipse Public License v1.0
   //  and Apache License v2.0 which accompanies this distribution.
   //
   //      The Eclipse Public License is available at
  //      http://www.eclipse.org/legal/epl-v10.html
  //
  //      The Apache License v2.0 is available at
  //      http://www.opensource.org/licenses/apache2.0.php
  //
  //  You may elect to redistribute this code under either of these licenses.
  //  ========================================================================
  //
  
  package org.eclipse.jetty.spdy.api;
  
  import java.nio.ByteBuffer;
  import java.util.concurrent.TimeUnit;
  
  /**
   * <p>Specialized {@link DataInfo} for {@link ByteBuffer} content.</p>
   */
  public class ByteBufferDataInfo extends DataInfo
  {
      private final ByteBuffer buffer;
      private final int length;
  
      public ByteBufferDataInfo(ByteBuffer buffer, boolean close)
      {
          this(0, TimeUnit.SECONDS, buffer, close);
      }
  
      public ByteBufferDataInfo(long timeout, TimeUnit unit, ByteBuffer buffer, boolean close)
      {
          super(timeout, unit, close);
          this.buffer = buffer;
          this.length = buffer.remaining();
      }
  
      @Override
      public int length()
      {
          return length;
      }
  
      @Override
      public int available()
      {
          return buffer.remaining();
      }
  
      @Override
      public int readInto(ByteBuffer output)
      {
          int space = output.remaining();
          if (available() > space)
          {
              int limit = buffer.limit();
              buffer.limit(buffer.position() + space);
              output.put(buffer);
              buffer.limit(limit);
          }
          else
          {
              space = buffer.remaining();
              output.put(buffer);
          }
          return space;
      }
  
      @Override
      public int readInto(byte[] bytes, int offset, int length)
      {
          int available = available();
          if (available < length)
              length = available;
          buffer.get(bytes, offset, length);
          return length;
      }
  
      @Override
      protected ByteBuffer allocate(int size)
      {
          return buffer.isDirect() ? ByteBuffer.allocateDirect(size) : super.allocate(size);
      }
  }