package org.apache.maven.plugins.assembly.filter;
   
   /*
    * 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.apache.maven.plugins.assembly.utils.AssemblyFileUtils;
  import org.codehaus.plexus.archiver.Archiver;
  import org.codehaus.plexus.archiver.ArchiverException;
  import org.codehaus.plexus.archiver.ResourceIterator;
  import org.codehaus.plexus.archiver.UnArchiver;
  import org.codehaus.plexus.components.io.fileselectors.FileInfo;
  
  import java.io.BufferedReader;
  import java.io.File;
  import java.io.FileOutputStream;
  import java.io.IOException;
  import java.io.InputStreamReader;
  import java.io.OutputStreamWriter;
  import java.io.PrintWriter;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  abstract class AbstractLineAggregatingHandler
      implements ContainerDescriptorHandler
  {
  
      private Map<String, List<String>> catalog = new HashMap<>();
  
      private boolean excludeOverride = false;
  
      protected abstract String getOutputPathPrefix( final FileInfo fileInfo );
  
      protected abstract boolean fileMatches( final FileInfo fileInfo );
  
      String getEncoding()
      {
          return "UTF-8";
      }
  
      @Override
      public void finalizeArchiveCreation( final Archiver archiver )
      {
          // this will prompt the isSelected() call, below, for all resources added to the archive.
          // FIXME: This needs to be corrected in the AbstractArchiver, where
          // runArchiveFinalizers() is called before regular resources are added...
          // which is done because the manifest needs to be added first, and the
          // manifest-creation component is a finalizer in the assembly plugin...
          for ( final ResourceIterator it = archiver.getResources(); it.hasNext(); )
          {
              it.next();
          }
  
          addToArchive( archiver );
      }
  
      void addToArchive( final Archiver archiver )
      {
          for ( final Map.Entry<String, List<String>> entry : catalog.entrySet() )
          {
              final String name = entry.getKey();
              final String fname = new File( name ).getName();
  
              File f;
              try
              {
                  f = File.createTempFile( "assembly-" + fname, ".tmp" );
                  f.deleteOnExit();
  
                  try ( PrintWriter writer =
                      new PrintWriter( new OutputStreamWriter( new FileOutputStream( f ), getEncoding() ) ) )
                  {
                      for ( final String line : entry.getValue() )
                      {
                          writer.println( line );
                      }
                  }
              }
              catch ( final IOException e )
              {
                  throw new ArchiverException(
                      "Error adding aggregated content for: " + fname + " to finalize archive creation. Reason: "
                         + e.getMessage(), e );
             }
 
             excludeOverride = true;
             archiver.addFile( f, name );
             excludeOverride = false;
         }
     }
 
     @Override
     public void finalizeArchiveExtraction( final UnArchiver unArchiver )
     {
     }
 
     @Override
     public List<String> getVirtualFiles()
     {
         return new ArrayList<>( catalog.keySet() );
     }
 
     @Override
     public boolean isSelected( final FileInfo fileInfo )
         throws IOException
     {
         if ( excludeOverride )
         {
             return true;
         }
 
         String name = AssemblyFileUtils.normalizeFileInfo( fileInfo );
 
         if ( fileInfo.isFile() && fileMatches( fileInfo ) )
         {
             name = getOutputPathPrefix( fileInfo ) + new File( name ).getName();
 
             List<String> lines = catalog.get( name );
             if ( lines == null )
             {
                 lines = new ArrayList<>();
                 catalog.put( name, lines );
             }
 
             readLines( fileInfo, lines );
 
             return false;
         }
 
         return true;
     }
 
     void readLines( final FileInfo fileInfo, final List<String> lines )
         throws IOException
     {
         try ( BufferedReader reader =
             new BufferedReader( new InputStreamReader( fileInfo.getContents(), getEncoding() ) ) )
         {
             for ( String line = reader.readLine(); line != null; line = reader.readLine() )
             {
                 if ( !lines.contains( line ) )
                 {
                     lines.add( line );
                 }
             }
         }
     }
 
     protected final Map<String, List<String>> getCatalog()
     {
         return catalog;
     }
 
     protected final void setCatalog( final Map<String, List<String>> catalog )
     {
         this.catalog = catalog;
     }
 
 }