| /******************************************************************************* |
| * Copyright (c) 2010, 2015 Sonatype, Inc. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Stuart McCulloch (Sonatype, Inc.) - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.sisu.space; |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import java.util.zip.ZipInputStream; |
| |
| /** |
| * {@link Iterator} that iterates over named entries inside JAR or ZIP resources. |
| */ |
| final class ZipEntryIterator |
| implements Iterator<String> |
| { |
| // ---------------------------------------------------------------------- |
| // Implementation fields |
| // ---------------------------------------------------------------------- |
| |
| private String[] entryNames; |
| |
| private int index; |
| |
| // ---------------------------------------------------------------------- |
| // Constructors |
| // ---------------------------------------------------------------------- |
| |
| ZipEntryIterator( final URL url ) |
| { |
| try |
| { |
| if ( "file".equals( url.getProtocol() ) ) |
| { |
| entryNames = getEntryNames( new ZipFile( FileEntryIterator.toFile( url ) ) ); |
| } |
| else |
| { |
| entryNames = getEntryNames( new ZipInputStream( Streams.open( url ) ) ); |
| } |
| } |
| catch ( final IOException e ) |
| { |
| entryNames = new String[0]; |
| } |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Public methods |
| // ---------------------------------------------------------------------- |
| |
| public boolean hasNext() |
| { |
| return index < entryNames.length; |
| } |
| |
| public String next() |
| { |
| return entryNames[index++]; |
| } |
| |
| public void remove() |
| { |
| throw new UnsupportedOperationException(); |
| } |
| |
| // ---------------------------------------------------------------------- |
| // Implementation methods |
| // ---------------------------------------------------------------------- |
| |
| /** |
| * Returns a string array listing the entries in the given zip file. |
| * |
| * @param zipFile The zip file |
| * @return Array of entry names |
| */ |
| private static String[] getEntryNames( final ZipFile zipFile ) |
| throws IOException |
| { |
| try |
| { |
| final String names[] = new String[zipFile.size()]; |
| final Enumeration<? extends ZipEntry> e = zipFile.entries(); |
| for ( int i = 0; i < names.length; i++ ) |
| { |
| names[i] = e.nextElement().getName(); |
| } |
| return names; |
| } |
| finally |
| { |
| zipFile.close(); |
| } |
| } |
| |
| /** |
| * Returns a string array listing the entries in the given zip stream. |
| * |
| * @param zipStream The zip stream |
| * @return Array of entry names |
| */ |
| private static String[] getEntryNames( final ZipInputStream zipStream ) |
| throws IOException |
| { |
| try |
| { |
| final List<String> names = new ArrayList<String>( 64 ); |
| for ( ZipEntry e = zipStream.getNextEntry(); e != null; e = zipStream.getNextEntry() ) |
| { |
| names.add( e.getName() ); |
| } |
| return names.toArray( new String[names.size()] ); |
| } |
| finally |
| { |
| zipStream.close(); |
| } |
| } |
| } |