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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.OutputStream;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;

/**
 * A InflaterWriter
 * 
 * This class takes an OutputStream. Compressed bytes
 * can directly be written into this class. The class will
 * decompress the bytes and write them to the output stream.
 * 
 * Not for concurrent use.
 *
 * @author Howard Gao
 */
public class InflaterWriter extends OutputStream
{
   private final Inflater inflater = new Inflater();

   private final OutputStream output;

   private final byte[] writeBuffer = new byte[1024];

   private int writePointer = 0;

   private final byte[] outputBuffer = new byte[writeBuffer.length * 2];

   public InflaterWriter(final OutputStream output)
   {
      this.output = output;
   }

   /*
    * Write a compressed byte.
    */
   @Override
   public void write(final int b) throws IOException
   {
      writeBuffer[writePointer] = (byte)(b & 0xFF);
      writePointer++;

      if (writePointer == writeBuffer.length)
      {
         writePointer = 0;
         try
         {
            doWrite();
         }
         catch (DataFormatException e)
         {
            IOException ie = new IOException("Error decompressing data");
            ie.initCause(e);
            throw ie;
         }
      }
   }

   @Override
   public void close() throws IOException
   {
      if (writePointer > 0)
      {
         inflater.setInput(writeBuffer, 0, writePointer);
         try
         {
            int n = inflater.inflate(outputBuffer);
            while (n > 0)
            {
               output.write(outputBuffer, 0, n);
               n = inflater.inflate(outputBuffer);
            }
            output.close();
         }
         catch (DataFormatException e)
         {
            IOException io = new IOException(e.getMessage());
            io.initCause(e);
            throw io;
         }
      }
   }

   private void doWrite() throws DataFormatException, IOException
   {
      inflater.setInput(writeBuffer);
      int n = inflater.inflate(outputBuffer);

      while (n > 0)
      {
         output.write(outputBuffer, 0, n);
         n = inflater.inflate(outputBuffer);
      }
   }

}