| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2002 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowlegement: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowlegement may appear in the software itself, |
| * if and wherever such third-party acknowlegements normally appear. |
| * |
| * 4. The names "The Jakarta Project", "Ant", and "Apache Software |
| * Foundation" must not be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache" |
| * nor may "Apache" appear in their names without prior written |
| * permission of the Apache Group. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.ant.init; |
| import java.net.MalformedURLException; |
| |
| import java.net.URL; |
| import java.io.File; |
| |
| /** |
| * The ClassLocator is a utility class which is used to determine the URL |
| * from which a class was loaded. |
| * |
| * @author <a href="mailto:conor@apache.org">Conor MacNeill</a> |
| * @created 9 January 2002 |
| */ |
| public class ClassLocator { |
| /** |
| * Get the URL for the given class's load location. |
| * |
| * @param theClass the class whose loadURL is desired. |
| * @return a URL which identifies the component from which this class |
| * was loaded. |
| * @throws MalformedURLException if the class' URL cannot be |
| * constructed. |
| */ |
| public static URL getClassLocationURL(Class theClass) |
| throws MalformedURLException { |
| String className = theClass.getName().replace('.', '/') + ".class"; |
| URL classRawURL = theClass.getClassLoader().getResource(className); |
| |
| String fileComponent = classRawURL.getFile(); |
| if (classRawURL.getProtocol().equals("file")) { |
| // Class comes from a directory of class files rather than |
| // from a jar. |
| int classFileIndex = fileComponent.lastIndexOf(className); |
| if (classFileIndex != -1) { |
| fileComponent = fileComponent.substring(0, classFileIndex); |
| } |
| |
| return new URL("file:" + fileComponent); |
| } else if (classRawURL.getProtocol().equals("jar")) { |
| // Class is coming from a jar. The file component of the URL |
| // is actually the URL of the jar file |
| int classSeparatorIndex = fileComponent.lastIndexOf("!"); |
| if (classSeparatorIndex != -1) { |
| fileComponent = fileComponent.substring(0, classSeparatorIndex); |
| } |
| |
| return new URL(fileComponent); |
| } else { |
| // its running out of something besides a jar. |
| // We just return the Raw URL as a best guess |
| return classRawURL; |
| } |
| } |
| |
| /** |
| * Get the URLs necessary to load the Sun compiler tools. In some JVMs |
| * this is available in the VM's system loader, in others we have to |
| * find it ourselves |
| * |
| * @return the URL to the tools jar if available, null otherwise |
| * @throws InitException if the URL to the tools jar cannot be formed. |
| */ |
| public static URL getToolsJarURL() |
| throws InitException { |
| try { |
| // just check whether this throws an exception |
| Class.forName("sun.tools.javac.Main"); |
| // tools jar is on system classpath - no need for URL |
| return null; |
| } catch (ClassNotFoundException cnfe) { |
| try { |
| // couldn't find compiler - try to find tools.jar |
| // based on java.home setting |
| String javaHome = System.getProperty("java.home"); |
| if (javaHome.endsWith("jre")) { |
| javaHome = javaHome.substring(0, javaHome.length() - 4); |
| } |
| File toolsjar = new File(javaHome + "/lib/tools.jar"); |
| if (!toolsjar.exists()) { |
| System.out.println("Unable to locate tools.jar. " |
| + "Expected to find it in " + toolsjar.getPath()); |
| return null; |
| } |
| URL toolsJarURL = InitUtils.getFileURL(toolsjar); |
| return toolsJarURL; |
| } catch (MalformedURLException e) { |
| throw new InitException(e); |
| } |
| } |
| } |
| } |
| |
