package org.apache.maven.wagon;
   
   /*
    * 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.File;
  import java.io.FileDescriptor;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.OutputStream;
  import java.nio.channels.FileChannel;
  
  
  /**
   * Variant of FileOutputStream which creates the file only when first portion
   * of data is written.
   *
   * @author <a href="mailto:mmaczka@interia.pl">Michal Maczka</a>
   *
   */
  public class LazyFileOutputStream
      extends OutputStream
  {
  
      private File file;
  
      private FileOutputStream delegee;
  
  
      public LazyFileOutputStream( String filename )
      {
          this.file = new File( filename );
      }
  
      public LazyFileOutputStream( File file )
      {
          this.file = file;
      }
  
  
      public void close()
          throws IOException
      {
          if ( delegee != null )
          {
              delegee.close();
          }
      }
  
  
      public boolean equals( Object obj )
      {
          return delegee.equals( obj );
      }
  
  
      public void flush()
          throws IOException
      {
          if ( delegee != null )
          {
              delegee.flush();
          }
      }
  
  
      public FileChannel getChannel()
      {
          return delegee.getChannel();
      }
  
  
      public FileDescriptor getFD()
          throws IOException
      {
          return delegee.getFD();
      }
  
      public int hashCode()
      {
          return delegee.hashCode();
      }
 
 
     public String toString()
     {
         return delegee.toString();
     }
 
     public void write( byte[] b )
         throws IOException
     {
         if ( delegee == null )
         {
             initialize();
         }
 
         delegee.write( b );
     }
 
     /**
      * @see java.io.OutputStream#write(byte[], int, int)
      */
     public void write( byte[] b, int off, int len )
         throws IOException
     {
         if ( delegee == null )
         {
             initialize();
         }
 
         delegee.write( b, off, len );
     }
 
     /**
      * @param b
      * @throws java.io.IOException
      */
     public void write( int b )
         throws IOException
     {
         if ( delegee == null )
         {
             initialize();
         }
 
         delegee.write( b );
     }
 
 
     /**
      * 
      */
     private void initialize()
         throws FileNotFoundException
     {
         delegee = new FileOutputStream( file );
     }
 }