org.eclipse.jdt.internal.compiler.apt.util.Archive Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2006, 2007 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.compiler.apt.util;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Hashtable;
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> packagesCache;
private 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>();
nextEntry : for (Enumeration 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);
ArrayList types = this.packagesCache.get(packageName);
if (types == null) {
// might be empty if this is a directory entry
if (typeName.length() == 0) {
continue nextEntry;
}
types = new ArrayList();
types.add(typeName);
this.packagesCache.put(packageName, types);
} else {
types.add(typeName);
}
}
}
public ArchiveFileObject getArchiveFileObject(String entryName, Charset charset) {
return new ArchiveFileObject(this.file, this.zipFile, entryName, charset);
}
public boolean contains(String entryName) {
return this.zipFile.getEntry(entryName) != null;
}
public Set allPackages() {
if (this.packagesCache == null) {
this.initialize();
}
return this.packagesCache.keySet();
}
public ArrayList getTypes(String packageName) {
// package name is expected to ends with '/'
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
}
}
}