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(-) [+]
line wrap: on
line diff
--- /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);
+    }
+}