| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.tomcat.util.scan; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.JarURLConnection; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| import java.util.jar.Manifest; |
| import java.util.zip.ZipEntry; |
| |
| import org.apache.tomcat.Jar; |
| |
| /** |
| * Implementation of {@link Jar} that is optimised for file based JAR URLs that |
| * refer directly to a JAR file (e.g URLs of the form jar:file: ... .jar!/ or |
| * file:... .jar) . |
| */ |
| public class JarFileUrlJar implements Jar { |
| |
| private final JarFile jarFile; |
| private final URL jarFileURL; |
| private Enumeration<JarEntry> entries; |
| private JarEntry entry = null; |
| |
| public JarFileUrlJar(URL url, boolean startsWithJar) throws IOException { |
| if (startsWithJar) { |
| // jar:file:... |
| JarURLConnection jarConn = (JarURLConnection) url.openConnection(); |
| jarConn.setUseCaches(false); |
| jarFile = jarConn.getJarFile(); |
| jarFileURL = jarConn.getJarFileURL(); |
| } else { |
| // file:... |
| File f; |
| try { |
| f = new File(url.toURI()); |
| } catch (URISyntaxException e) { |
| throw new IOException(e); |
| } |
| jarFile = new JarFile(f); |
| jarFileURL = url; |
| } |
| } |
| |
| |
| @Override |
| public URL getJarFileURL() { |
| return jarFileURL; |
| } |
| |
| |
| @Override |
| public boolean entryExists(String name) { |
| ZipEntry entry = jarFile.getEntry(name); |
| return entry != null; |
| } |
| |
| @Override |
| public InputStream getInputStream(String name) throws IOException { |
| ZipEntry entry = jarFile.getEntry(name); |
| if (entry == null) { |
| return null; |
| } else { |
| return jarFile.getInputStream(entry); |
| } |
| } |
| |
| @Override |
| public long getLastModified(String name) throws IOException { |
| ZipEntry entry = jarFile.getEntry(name); |
| if (entry == null) { |
| return -1; |
| } else { |
| return entry.getTime(); |
| } |
| } |
| |
| @Override |
| public String getURL(String entry) { |
| StringBuilder result = new StringBuilder("jar:"); |
| result.append(getJarFileURL().toExternalForm()); |
| result.append("!/"); |
| result.append(entry); |
| |
| return result.toString(); |
| } |
| |
| @Override |
| public void close() { |
| if (jarFile != null) { |
| try { |
| jarFile.close(); |
| } catch (IOException e) { |
| // Ignore |
| } |
| } |
| } |
| |
| @Override |
| public void nextEntry() { |
| if (entries == null) { |
| entries = jarFile.entries(); |
| } |
| if (entries.hasMoreElements()) { |
| entry = entries.nextElement(); |
| } else { |
| entry = null; |
| } |
| } |
| |
| @Override |
| public String getEntryName() { |
| if (entry == null) { |
| return null; |
| } else { |
| return entry.getName(); |
| } |
| } |
| |
| @Override |
| public InputStream getEntryInputStream() throws IOException { |
| if (entry == null) { |
| return null; |
| } else { |
| return jarFile.getInputStream(entry); |
| } |
| } |
| |
| @Override |
| public Manifest getManifest() throws IOException { |
| return jarFile.getManifest(); |
| } |
| |
| |
| @Override |
| public void reset() throws IOException { |
| entries = null; |
| entry = null; |
| } |
| } |