package org.apache.maven.plugins.shade.resource;

 /*

  * 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.

  */

 import java.io.ByteArrayInputStream;

 import java.io.ByteArrayOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.util.List;

 import java.util.jar.JarEntry;

 import java.util.jar.JarOutputStream;

 import org.codehaus.plexus.util.IOUtil;

 /**

  * A resource processor that appends content for a resource, separated by a newline.

  * 

  */

 public class AppendingTransformer

     implements ResourceTransformer

 {

     String resource;

     ByteArrayOutputStream data = new ByteArrayOutputStream();

     public boolean canTransformResource( String r )

     {

         if ( resource != null && resource.equalsIgnoreCase( r ) )

         {

             return true;

         }

         return false;

     }

     public void processResource( String resource, InputStream is, List relocators )

         throws IOException

     {

         IOUtil.copy( is, data );

         data.write( '\n' );

         is.close();

     }

     public boolean hasTransformedResource()

     {

         return data.size() > 0;

     }

     public void modifyOutputStream( JarOutputStream jos )

         throws IOException

     {

         jos.putNextEntry( new JarEntry( resource ) );

         IOUtil.copy( new ByteArrayInputStream( data.toByteArray() ), jos );

         data.reset();

     }

 }