package org.apache.maven.plugins.assembly.archive.archiver;
   
   /*
    * 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 org.codehaus.plexus.archiver.FileSet;
  import org.codehaus.plexus.components.io.fileselectors.FileSelector;
  import org.codehaus.plexus.components.io.functions.InputStreamTransformer;
  
  import java.io.File;
  import org.codehaus.plexus.components.io.filemappers.FileMapper;
  
  /**
   *
   */
  class PrefixedFileSet
      implements FileSet
  {
      private final static FileMapper[] EMPTY_FILE_MAPPERS_ARRAY = new FileMapper[0];
  
      private final String rootPrefix;
  
      private final FileSet fileSet;
  
      private final FileSelector[] selectors;
  
      /**
       * @param fileSet    The file set.
       * @param rootPrefix The root prefix
       * @param selectors  The file selectors.
       */
      PrefixedFileSet( final FileSet fileSet, final String rootPrefix, final FileSelector[] selectors )
      {
          this.fileSet = fileSet;
          this.selectors = selectors;
  
          if ( rootPrefix.length() > 0 && !rootPrefix.endsWith( "/" ) )
          {
              this.rootPrefix = rootPrefix + "/";
          }
          else
          {
              this.rootPrefix = rootPrefix;
          }
      }
  
      /**
       * {@inheritDoc}
       */
      static FileSelector[] combineSelectors( FileSelector[] first, FileSelector[] second )
      {
          if ( ( first != null ) && ( second != null ) )
          {
              final FileSelector[] temp = new FileSelector[first.length + second.length];
  
              System.arraycopy( first, 0, temp, 0, first.length );
              System.arraycopy( second, 0, temp, first.length, second.length );
  
              first = temp;
          }
          else if ( ( first == null ) && ( second != null ) )
          {
              first = second;
          }
  
          return first;
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public String[] getExcludes()
      {
          return fileSet.getExcludes();
      }
  
      /**
       * {@inheritDoc}
       */
      @Override
      public FileSelector[] getFileSelectors()
      {
         FileSelector[] sel = fileSet.getFileSelectors();
         final FileSelector[] selectors1 = selectors;
         return combineSelectors( sel, selectors1 );
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String[] getIncludes()
     {
         return fileSet.getIncludes();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public String getPrefix()
     {
         String prefix = fileSet.getPrefix();
         if ( prefix == null )
         {
             return rootPrefix;
         }
 
         if ( prefix.startsWith( "/" ) )
         {
             if ( prefix.length() > 1 )
             {
                 prefix = prefix.substring( 1 );
             }
             else
             {
                 prefix = "";
             }
         }
 
         return rootPrefix + prefix;
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean isCaseSensitive()
     {
         return fileSet.isCaseSensitive();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean isIncludingEmptyDirectories()
     {
         return fileSet.isIncludingEmptyDirectories();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public boolean isUsingDefaultExcludes()
     {
         return fileSet.isUsingDefaultExcludes();
     }
 
     /**
      * {@inheritDoc}
      */
     @Override
     public File getDirectory()
     {
         return fileSet.getDirectory();
     }
 
     @Override
     public InputStreamTransformer getStreamTransformer()
     {
         return fileSet.getStreamTransformer();
     }
 
     @Override
     public FileMapper[] getFileMappers()
     {
         return EMPTY_FILE_MAPPERS_ARRAY;
     }
 }