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/*
* Javassist, a Java-bytecode translator toolkit.
* Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. Alternatively, the contents of this file may be used under
* the terms of the GNU Lesser General Public License Version 2.1 or later,
* or the Apache License Version 2.0.
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*/
package javassist;
import java.io.InputStream;
import java.net.URL;
/**
* A search-path for obtaining a class file
* by <code>getResourceAsStream()</code> in <code>java.lang.Class</code>.
*
* <p>Try adding a <code>ClassClassPath</code> when a program is running
* with a user-defined class loader and any class files are not found with
* the default <code>ClassPool</code>. For example,
*
* <pre>
* ClassPool cp = ClassPool.getDefault();
* cp.insertClassPath(new ClassClassPath(this.getClass()));
* </pre>
*
* This code snippet permanently adds a <code>ClassClassPath</code>
* to the default <code>ClassPool</code>. Note that the default
* <code>ClassPool</code> is a singleton. The added
* <code>ClassClassPath</code> uses a class object representing
* the class including the code snippet above.
*
* <p>Class files in a named module are private to that module.
* This method cannot obtain class files in named modules.
* </p>
*
* @see ClassPool#insertClassPath(ClassPath)
* @see ClassPool#appendClassPath(ClassPath)
* @see LoaderClassPath
*/
public class ClassClassPath implements ClassPath {
private Class<?> thisClass;
/** Creates a search path.
*
* @param c the <code>Class</code> object used to obtain a class
* file. <code>getResourceAsStream()</code> is called on
* this object.
*/
public ClassClassPath(Class<?> c) {
thisClass = c;
}
ClassClassPath() {
/* The value of thisClass was this.getClass() in early versions:
*
* thisClass = this.getClass();
*
* However, this made openClassfile() not search all the system
* class paths if javassist.jar is put in jre/lib/ext/
* (with JDK1.4).
*/
this(java.lang.Object.class);
}
/**
* Obtains a class file by <code>getResourceAsStream()</code>.
*/
@Override
public InputStream openClassfile(String classname) throws NotFoundException {
String filename = '/' + classname.replace('.', '/') + ".class";
return thisClass.getResourceAsStream(filename);
}
/**
* Obtains the URL of the specified class file.
*
* @return null if the class file could not be found.
*/
@Override
public URL find(String classname) {
String filename = '/' + classname.replace('.', '/') + ".class";
return thisClass.getResource(filename);
}
/**
* Does nothing.
*/
@Override
public void close() {
}
@Override
public String toString() {
return thisClass.getName() + ".class";
}
}
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