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This artifact provides a single jar that contains all classes required to use remote Jakarta Enterprise Beans and Jakarta Messaging, including all dependencies. It is intended for use by those not using maven, maven users should just import the Jakarta Enterprise Beans and Jakarta Messaging BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up with different versions on classes on the class path).

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/*
 * Copyright 2005-2014 Red Hat, Inc.
 * Red Hat 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.hornetq.utils;

import java.io.IOException;
import java.io.InputStream;

import org.hornetq.api.core.HornetQBuffer;

/**
 * Used to send large messages
 *
 * @author Clebert Suconic
 *
 *
 */
public class HornetQBufferInputStream extends InputStream
{

   /* (non-Javadoc)
    * @see java.io.InputStream#read()
    */
   // Constants -----------------------------------------------------

   // Attributes ----------------------------------------------------
   private HornetQBuffer bb;

   // Static --------------------------------------------------------

   // Constructors --------------------------------------------------

   // Public --------------------------------------------------------

   public HornetQBufferInputStream(final HornetQBuffer paramByteBuffer)
   {
      bb = paramByteBuffer;
   }

   @Override
   public int read() throws IOException
   {
      if (bb == null)
      {
         throw new IOException("read on a closed InputStream");
      }

      if (remainingBytes() == 0)
      {
         return -1;
      }
      else
      {
         return bb.readByte() & 0xFF;
      }
   }

   @Override
   public int read(final byte[] byteArray) throws IOException
   {
      if (bb == null)
      {
         throw new IOException("read on a closed InputStream");
      }

      return read(byteArray, 0, byteArray.length);
   }

   @Override
   public int read(final byte[] byteArray, final int off, final int len) throws IOException
   {
      if (bb == null)
      {
         throw new IOException("read on a closed InputStream");
      }

      if (byteArray == null)
      {
         throw new NullPointerException();
      }
      if (off < 0 || off > byteArray.length || len < 0 || off + len > byteArray.length || off + len < 0)
      {
         throw new IndexOutOfBoundsException();
      }
      if (len == 0)
      {
         return 0;
      }

      int size = Math.min(remainingBytes(), len);

      if (size == 0)
      {
         return -1;
      }

      bb.readBytes(byteArray, off, size);
      return size;
   }

   @Override
   public long skip(final long len) throws IOException
   {
      if (bb == null)
      {
         throw new IOException("skip on a closed InputStream");
      }

      if (len <= 0L)
      {
         return 0L;
      }

      int size = Math.min(remainingBytes(), (int) len);

      bb.skipBytes(size);

      return size;
   }

   @Override
   public int available() throws IOException
   {
      if (bb == null)
      {
         throw new IOException("available on a closed InputStream");
      }

      return remainingBytes();
   }

   @Override
   public void close() throws IOException
   {
      bb = null;
   }

   @Override
   public synchronized void mark(final int paramInt)
   {
   }

   @Override
   public synchronized void reset() throws IOException
   {
      throw new IOException("mark/reset not supported");
   }

   @Override
   public boolean markSupported()
   {
      return false;
   }

   // Package protected ---------------------------------------------

   // Protected -----------------------------------------------------

   // Private -------------------------------------------------------

   /**
    * @return
    */
   private int remainingBytes()
   {
      return bb.writerIndex() - bb.readerIndex();
   }


   // Inner classes -------------------------------------------------

}