| /* |
| * Copyright (C) 2010 Google Inc. |
| * |
| * Licensed 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 com.google.doclava; |
| |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.jar.JarEntry; |
| import java.util.jar.JarFile; |
| |
| public class JarUtils { |
| /** |
| * Returns the jar file used to load class clazz, or defaultJar if clazz was not loaded from a |
| * jar. |
| */ |
| public static JarFile jarForClass(Class<?> clazz, JarFile defaultJar) { |
| String path = "/" + clazz.getName().replace('.', '/') + ".class"; |
| URL jarUrl = clazz.getResource(path); |
| if (jarUrl == null) { |
| return defaultJar; |
| } |
| |
| String url = jarUrl.toString(); |
| int bang = url.indexOf("!"); |
| String JAR_URI_PREFIX = "jar:file:"; |
| if (url.startsWith(JAR_URI_PREFIX) && bang != -1) { |
| try { |
| return new JarFile(url.substring(JAR_URI_PREFIX.length(), bang)); |
| } catch (IOException e) { |
| throw new IllegalStateException("Error loading jar file.", e); |
| } |
| } else { |
| return defaultJar; |
| } |
| } |
| |
| /** |
| * Copies a directory from a jar file to an external directory. |
| */ |
| public static void copyResourcesToDirectory(JarFile fromJar, String jarDir, String destDir) |
| throws IOException { |
| for (Enumeration<JarEntry> entries = fromJar.entries(); entries.hasMoreElements();) { |
| JarEntry entry = entries.nextElement(); |
| if (entry.getName().startsWith(jarDir + "/") && !entry.isDirectory()) { |
| File dest = new File(destDir + "/" + entry.getName().substring(jarDir.length() + 1)); |
| File parent = dest.getParentFile(); |
| if (parent != null) { |
| parent.mkdirs(); |
| } |
| |
| FileOutputStream out = new FileOutputStream(dest); |
| InputStream in = fromJar.getInputStream(entry); |
| |
| try { |
| byte[] buffer = new byte[8 * 1024]; |
| |
| int s = 0; |
| while ((s = in.read(buffer)) > 0) { |
| out.write(buffer, 0, s); |
| } |
| } catch (IOException e) { |
| throw new IOException("Could not copy asset from jar file", e); |
| } finally { |
| try { |
| in.close(); |
| } catch (IOException ignored) {} |
| try { |
| out.close(); |
| } catch (IOException ignored) {} |
| } |
| } |
| } |
| |
| } |
| |
| private JarUtils() {} // non-instantiable |
| } |