Mercurial > hg > icedrobot > daneel
changeset 60:cb2a2dc8c451
Added new tool for class loader inspection.
* tools/ClassLoaderInspector.java: New tooling class.
author | Michael Starzinger <michi@complang.tuwien.ac.at> |
---|---|
date | Tue, 22 Mar 2011 01:08:25 +0100 |
parents | 09769b7503f1 |
children | 818050257c69 |
files | src/main/java/org/icedrobot/daneel/tools/ClassLoaderInspector.java |
diffstat | 1 files changed, 76 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/main/java/org/icedrobot/daneel/tools/ClassLoaderInspector.java Tue Mar 22 01:08:25 2011 +0100 @@ -0,0 +1,76 @@ +/* + * Daneel - Dalvik to Java bytecode compiler + * Copyright (C) 2011 IcedRobot team + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * This file is subject to the "Classpath" exception: + * + * Linking this library statically or dynamically with other modules is + * making a combined work based on this library. Thus, the terms and + * conditions of the GNU General Public License cover the whole + * combination. + * + * As a special exception, the copyright holders of this library give you + * permission to link this library with independent modules to produce an + * executable, regardless of the license terms of these independent + * modules, and to copy and distribute the resulting executable under terms + * of your choice, provided that you also meet, for each linked independent + * module, the terms and conditions of the license of that module. An + * independent module is a module which is not derived from or based on + * this library. If you modify this library, you may extend this exception + * to your version of the library, but you are not obligated to do so. If + * you do not wish to do so, delete this exception statement from your + * version. + */ + +package org.icedrobot.daneel.tools; + +import java.io.PrintStream; +import java.net.URL; +import java.net.URLClassLoader; + +/** + * Simple tool to inspect the chain of class loaders acting in the system. + */ +public class ClassLoaderInspector { + + /** + * Prints information about every class loader in the delegation chain + * starting with the system class loader. + * + * @param out The output stream to print to. + */ + public void execute(PrintStream out) { + ClassLoader cl = ClassLoader.getSystemClassLoader(); + for (int clCount = 1; cl != null; cl = cl.getParent()) { + out.printf("CL #%d: %s\n", clCount++, cl); + if (cl instanceof URLClassLoader) { + URLClassLoader ucl = (URLClassLoader) cl; + out.printf(" instanceof URLClassLoader\n"); + out.printf(" search path:\n"); + int urlCount = 1; + for (URL url : ucl.getURLs()) + out.printf(" URL #%d: %s\n", urlCount++, url); + out.printf(" end of search path.\n"); + } + } + out.printf("end of chain.\n"); + } + + public static void main(String[] args) { + ClassLoaderInspector inspector = new ClassLoaderInspector(); + inspector.execute(System.out); + } +}