| /******************************************************************************* |
| * Copyright (c) 2006, 2015 IBM Corporation and others. |
| * 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 |
| * |
| * This is an implementation of an early-draft specification developed under the Java |
| * Community Process (JCP) and is made available for testing and evaluation purposes |
| * only. The code is not compatible with any specification of the JCP. |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.compiler.tool; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.charset.Charset; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.Hashtable; |
| import java.util.List; |
| import java.util.Set; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipException; |
| import java.util.zip.ZipFile; |
| |
| /** |
| * Used as a zip file cache. |
| */ |
| public class Archive { |
| |
| public static final Archive UNKNOWN_ARCHIVE = new Archive(); |
| |
| ZipFile zipFile; |
| File file; |
| |
| protected Hashtable<String, ArrayList<String[]>> packagesCache; |
| |
| protected Archive() { |
| // used to construct UNKNOWN_ARCHIVE |
| } |
| |
| public Archive(File file) throws ZipException, IOException { |
| this.file = file; |
| this.zipFile = new ZipFile(file); |
| initialize(); |
| } |
| |
| private void initialize() { |
| // initialize packages |
| this.packagesCache = new Hashtable<>(); |
| for (Enumeration<? extends ZipEntry> e = this.zipFile.entries(); e.hasMoreElements(); ) { |
| String fileName = ((ZipEntry) e.nextElement()).getName(); |
| |
| // add the package name & all of its parent packages |
| int last = fileName.lastIndexOf('/'); |
| // extract the package name |
| String packageName = fileName.substring(0, last + 1); |
| String typeName = fileName.substring(last + 1); |
| // might be empty if this is a directory entry |
| if (typeName.length() == 0) { |
| continue; |
| } |
| cacheTypes(packageName, typeName); |
| } |
| } |
| |
| protected void cacheTypes(String packageName, String typeName) { |
| ArrayList<String[]> types = this.packagesCache.get(packageName); |
| if (typeName == null) return; |
| if (types == null) { |
| |
| types = new ArrayList<>(); |
| types.add(new String[]{typeName, null}); |
| this.packagesCache.put(packageName, types); |
| } else { |
| types.add(new String[]{typeName, null}); |
| } |
| } |
| |
| public ArchiveFileObject getArchiveFileObject(String fileName, String module, Charset charset) { |
| return new ArchiveFileObject(this.file, fileName, charset); |
| } |
| |
| public boolean contains(String entryName) { |
| return this.zipFile.getEntry(entryName) != null; |
| } |
| |
| public Set<String> allPackages() { |
| if (this.packagesCache == null) { |
| this.initialize(); |
| } |
| return this.packagesCache.keySet(); |
| } |
| |
| /** |
| * Returns an array of String - the array contains exactly two elements. The first element |
| * is the name of the type and the second being the module that contains the type. For a regular |
| * Jar archive, the module element will be null. This is applicable only to Jimage files |
| * where types are contained by multiple modules. |
| */ |
| public List<String[]> getTypes(String packageName) { |
| // package name is expected to ends with '/' |
| if (this.packagesCache == null) { |
| try { |
| this.zipFile = new ZipFile(this.file); |
| } catch(IOException e) { |
| return Collections.<String[]>emptyList(); |
| } |
| this.initialize(); |
| } |
| return this.packagesCache.get(packageName); |
| } |
| |
| public void flush() { |
| this.packagesCache = null; |
| } |
| |
| public void close() { |
| try { |
| if (this.zipFile != null) { |
| this.zipFile.close(); |
| } |
| this.packagesCache = null; |
| } catch (IOException e) { |
| // ignore |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "Archive: " + (this.file == null ? "UNKNOWN_ARCHIVE" : this.file.getAbsolutePath()); //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| } |