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authoraclement <aclement>2007-02-12 09:34:01 +0000
committeraclement <aclement>2007-02-12 09:34:01 +0000
commit2447dfe82db042aa10fa5c2a4ba0646c37dc26d7 (patch)
tree9b8bff266154b16001ed61994ed413915318d501 /bcel-builder/src/org/aspectj/apache/bcel/util/JavaWrapper.java
parentb945551fa2573798afbe62736e66147efe906827 (diff)
downloadaspectj-2447dfe82db042aa10fa5c2a4ba0646c37dc26d7.tar.gz
aspectj-2447dfe82db042aa10fa5c2a4ba0646c37dc26d7.zip
major refactoring - writeup to follow...
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diff --git a/bcel-builder/src/org/aspectj/apache/bcel/util/JavaWrapper.java b/bcel-builder/src/org/aspectj/apache/bcel/util/JavaWrapper.java
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-package org.aspectj.apache.bcel.util;
-
-/* ====================================================================
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 2001 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 acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Apache" and "Apache Software Foundation" and
- * "Apache BCEL" 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",
- * "Apache BCEL", nor may "Apache" appear in their name, without
- * prior written permission of the Apache Software Foundation.
- *
- * 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/>.
- */
-
-import java.lang.reflect.*;
-
-/**
- * Java interpreter replacement, i.e., wrapper that uses its own ClassLoader
- * to modify/generate classes as they're requested. You can take this as a template
- * for your own applications.<br>
- * Call this wrapper with
- * <pre>java org.aspectj.apache.bcel.util.JavaWrapper &lt;real.class.name&gt; [arguments]</pre>
- * <p>
- * To use your own class loader you can set the "bcel.classloader" system property
- * which defaults to "org.aspectj.apache.bcel.util.ClassLoader", e.g., with
- * <pre>java org.aspectj.apache.bcel.util.JavaWrapper -Dbcel.classloader=foo.MyLoader &lt;real.class.name&gt; [arguments]</pre>
- * </p>
- *
- * @version $Id: JavaWrapper.java,v 1.2 2004/11/19 16:45:19 aclement Exp $
- * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
- * @see ClassLoader
- */
-public class JavaWrapper {
- private java.lang.ClassLoader loader;
-
- private static java.lang.ClassLoader getClassLoader() {
- String s = System.getProperty("bcel.classloader");
-
- if((s == null) || "".equals(s))
- s = "org.aspectj.apache.bcel.util.ClassLoader";
-
- try {
- return (java.lang.ClassLoader)Class.forName(s).newInstance();
- } catch(Exception e) {
- throw new RuntimeException(e.toString());
- }
- }
-
- public JavaWrapper(java.lang.ClassLoader loader) {
- this.loader = loader;
- }
-
- public JavaWrapper() {
- this(getClassLoader());
- }
-
- /** Runs the main method of the given class with the arguments passed in argv
- *
- * @param class_name the fully qualified class name
- * @param argv the arguments just as you would pass them directly
- */
- public void runMain(String class_name, String[] argv) throws ClassNotFoundException
- {
- Class cl = loader.loadClass(class_name);
- Method method = null;
-
- try {
- method = cl.getMethod("main", new Class[] { argv.getClass() });
-
- /* Method main is sane ?
- */
- int m = method.getModifiers();
- Class r = method.getReturnType();
-
- if(!(Modifier.isPublic(m) && Modifier.isStatic(m)) ||
- Modifier.isAbstract(m) || (r != Void.TYPE))
- throw new NoSuchMethodException();
- } catch(NoSuchMethodException no) {
- System.out.println("In class " + class_name +
- ": public static void main(String[] argv) is not defined");
- return;
- }
-
- try {
- method.invoke(null, new Object[] { argv });
- } catch(Exception ex) {
- ex.printStackTrace();
- }
- }
-
- /** Default main method used as wrapper, expects the fully qualified class name
- * of the real class as the first argument.
- */
- public static void main(String[] argv) throws Exception {
- /* Expects class name as first argument, other arguments are by-passed.
- */
- if(argv.length == 0) {
- System.out.println("Missing class name.");
- return;
- }
-
- String class_name = argv[0];
- String[] new_argv = new String[argv.length - 1];
- System.arraycopy(argv, 1, new_argv, 0, new_argv.length);
-
- JavaWrapper wrapper = new JavaWrapper();
- wrapper.runMain(class_name, new_argv);
- }
-}
-