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feilong is a suite of core and expanded libraries that include utility classes, http, excel,cvs, io classes, and much much more.

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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 com.feilong.lib.javassist;

import java.io.InputStream;
import java.net.URL;

/**
 * A search-path for obtaining a class file
 * by getResourceAsStream() in java.lang.Class.
 *
 * 
 * Try adding a ClassClassPath when a program is running
 * with a user-defined class loader and any class files are not found with
 * the default ClassPool. For example,
 *
 * 
 * ClassPool cp = ClassPool.getDefault();
 * cp.insertClassPath(new ClassClassPath(this.getClass()));
 * 
 *
 * This code snippet permanently adds a ClassClassPath
 * to the default ClassPool. Note that the default
 * ClassPool is a singleton. The added
 * ClassClassPath uses a class object representing
 * the class including the code snippet above.
 *
 * 
 * Class files in a named module are private to that module.
 * This method cannot obtain class files in named modules.
 * 
 *
 * @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 Class object used to obtain a class
     *            file. getResourceAsStream() 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 getResourceAsStream().
     */
    @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);
    }

    @Override
    public String toString(){
        return thisClass.getName() + ".class";
    }
}