| /******************************************************************************* |
| * Copyright (c) 2005, 2021 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 |
| * Rob Harrop - SpringSource Inc. (bug 253942) |
| *******************************************************************************/ |
| |
| package org.eclipse.osgi.storage.bundlefile; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.Iterator; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import org.eclipse.osgi.internal.debug.Debug; |
| import org.eclipse.osgi.internal.messages.Msg; |
| import org.eclipse.osgi.storage.BundleInfo; |
| import org.eclipse.osgi.util.NLS; |
| |
| /** |
| * A BundleFile that uses a ZipFile as it base file. |
| */ |
| public class ZipBundleFile extends CloseableBundleFile<ZipEntry> { |
| |
| final boolean verify; |
| /** |
| * The zip file |
| */ |
| volatile ZipFile zipFile; |
| |
| public ZipBundleFile(File basefile, BundleInfo.Generation generation, MRUBundleFileList mruList, Debug debug, |
| boolean verify) throws IOException { |
| super(basefile, generation, mruList, debug); |
| this.verify = verify; |
| if (!BundleFile.secureAction.exists(basefile)) |
| throw new IOException(NLS.bind(Msg.ADAPTER_FILEEXIST_EXCEPTION, basefile)); |
| } |
| |
| @Override |
| protected void doOpen() throws IOException { |
| zipFile = BundleFile.secureAction.getZipFile(this.basefile, verify); |
| } |
| |
| /** |
| * Returns a ZipEntry for the bundle file. Must be called while holding the open lock. |
| * This method does not ensure that the ZipFile is opened. Callers may need to call getZipfile() prior to calling this |
| * method. |
| * @param path the path to an entry |
| * @return a ZipEntry or null if the entry does not exist |
| */ |
| private ZipEntry getZipEntry(String path) { |
| if (path.length() > 0 && path.charAt(0) == '/') |
| path = path.substring(1); |
| ZipEntry entry = zipFile.getEntry(path); |
| if (entry != null && entry.getSize() == 0 && !entry.isDirectory()) { |
| // work around the directory bug see bug 83542 |
| ZipEntry dirEntry = zipFile.getEntry(path + '/'); |
| if (dirEntry != null) |
| entry = dirEntry; |
| } |
| return entry; |
| } |
| |
| @Override |
| protected BundleEntry findEntry(String path) { |
| ZipEntry zipEntry = getZipEntry(path); |
| if (zipEntry == null) { |
| if (path.length() == 0 || path.charAt(path.length() - 1) == '/') { |
| // this is a directory request lets see if any entries exist in this directory |
| if (containsDir(path)) |
| return new DirZipBundleEntry(this, path); |
| } |
| return null; |
| } |
| return new ZipBundleEntry(zipEntry, this); |
| } |
| |
| @Override |
| protected void doClose() throws IOException { |
| zipFile.close(); |
| } |
| |
| @Override |
| protected void postClose() { |
| zipFile = null; |
| } |
| |
| @Override |
| protected InputStream doGetInputStream(ZipEntry entry) throws IOException { |
| return zipFile.getInputStream(entry); |
| } |
| |
| @Override |
| protected Iterable<String> getPaths() { |
| return () -> { |
| final Enumeration<? extends ZipEntry> entries = zipFile.entries(); |
| return new Iterator<String>() { |
| @Override |
| public boolean hasNext() { |
| return entries.hasMoreElements(); |
| } |
| |
| @Override |
| public String next() { |
| ZipEntry entry = entries.nextElement(); |
| return entry.getName(); |
| } |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException(); |
| } |
| }; |
| }; |
| } |
| } |