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/*******************************************************************************
* Copyright (c) 2006, 2017 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* 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.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<>();
nextEntry : 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);
ArrayList<String[]> 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(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();
}
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()); //$NON-NLS-1$ //$NON-NLS-2$
}
}
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