package org.apache.maven.index.util.zip;

 /*

  * 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.IOException;

 import java.io.InputStream;

 import java.util.ArrayList;

 import java.util.Enumeration;

 import java.util.List;

 import java.util.zip.ZipEntry;

 import java.util.zip.ZipFile;

 public class JavaZipFileHandle

     extends AbstractZipHandle

     implements ZipHandle

 {

     private final ZipFile zipFile;

     public JavaZipFileHandle( final File targetFile )

         throws IOException

     {

         super( targetFile );

         this.zipFile = new ZipFile( targetFile );

     }

     protected ZipFile getZipFile()

     {

         return zipFile;

     }

     public boolean hasEntry( String path )

         throws IOException

     {

         return getZipFile().getEntry( path ) != null;

     }

     public List<String> getEntries()

     {

         return getEntries( new EntryNameFilter()

         {

             public boolean accepts( String entryName )

             {

                 return true;

             }

         } );

     }

     public List<String> getEntries( EntryNameFilter filter )

     {

         ArrayList<String> entries = new ArrayList<String>();

         Enumeration<? extends ZipEntry> en = getZipFile().entries();

         while ( en.hasMoreElements() )

         {

             final ZipEntry e = en.nextElement();

             final String name = e.getName();

             if ( filter != null && !filter.accepts( name ) )

             {

                 continue;

             }

             entries.add( name );

         }

         return entries;

     }

     public InputStream getEntryContent( String path )

         throws IOException

     {

         ZipEntry entry = getZipFile().getEntry( path );

         if ( entry != null )

         {

             return getZipFile().getInputStream( entry );

         }

         else

         {

             return null;

         }

     }

     public void close()

         throws IOException

     {

         getZipFile().close();

     }

 }