/* *******************************************************************
* Copyright (c) 2004 IBM Corporation
* All rights reserved.
* This program and the accompanying materials are made available
* under the terms of the Common Public License v1.0
* which accompanies this distribution and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* Matthew Webster, Adrian Colyer,
* Martin Lippert initial implementation
* ******************************************************************/
package org.aspectj.weaver;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;
import java.security.CodeSource;
import org.aspectj.util.FileUtil;
import org.aspectj.weaver.bcel.ClassPathManager;
public abstract class ExtensibleURLClassLoader extends URLClassLoader {
private ClassPathManager classPath;
public ExtensibleURLClassLoader (URL[] urls, ClassLoader parent) {
super(urls,parent);
// System.err.println("? ExtensibleURLClassLoader.<init>() path=" + WeavingAdaptor.makeClasspath(urls));
classPath = new ClassPathManager(FileUtil.makeClasspath(urls),null);
}
protected void addURL(URL url) {
super.addURL(url); // amc - this call was missing and is needed in
// WeavingURLClassLoader chains
classPath.addPath(url.getPath(),null);
}
protected Class findClass(String name) throws ClassNotFoundException {
// System.err.println("? ExtensibleURLClassLoader.findClass(" + name + ")");
try {
byte[] bytes = getBytes(name);
if (bytes != null) {
return defineClass(name,bytes);
}
else {
throw new ClassNotFoundException(name);
}
}
catch (IOException ex) {
throw new ClassNotFoundException(name);
}
}
protected Class defineClass(String name, byte[] b, CodeSource cs) throws IOException {
// System.err.println("? ExtensibleURLClassLoader.defineClass(" + name + ",[" + b.length + "])");
return defineClass(name, b, 0, b.length, cs);
}
protected byte[] getBytes (String name) throws IOException {
byte[] b = null;
ClassPathManager.ClassFile classFile = classPath.find(UnresolvedType.forName(name));
if (classFile != null) {
b = FileUtil.readAsByteArray(classFile.getInputStream());
}
return b;
}
private Class defineClass(String name, byte[] bytes /*ClassPathManager.ClassFile classFile*/) throws IOException {
String packageName = getPackageName(name);
if (packageName != null) {
Package pakkage = getPackage(packageName);
if (pakkage == null) {
definePackage(packageName,null,null,null,null,null,null,null);
}
}
return defineClass(name, bytes, null);
}
private String getPackageName (String className) {
int offset = className.lastIndexOf('.');
return (offset == -1)? null : className.substring(0,offset);
}
}