org.cyclades.engine.nyxlet.DeferredDelegationURLClassLoader Maven / Gradle / Ivy

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 * Copyright (c) 2012, THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY
 * All rights reserved.
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 * are permitted provided that the following conditions are met:
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 *    and/or other materials provided with the distribution.
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 *    may be used to endorse or promote products derived from this software without
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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package org.cyclades.engine.nyxlet;

import java.net.URL;
import java.net.URLClassLoader;

public class DeferredDelegationURLClassLoader extends URLClassLoader {

    public DeferredDelegationURLClassLoader(URL[] urls, ClassLoader parent) {
        super(urls, parent);
    }

    protected synchronized Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
        // First, check if the class has already been loaded
        Class c = findLoadedClass(name);
        if (c == null) {
            // Look locally
            try {
                c = findClass(name);
            } catch (ClassNotFoundException e) {
                c = null;
            }
            // Look in parent if not found
            if (c == null) {
                try {
                    c = getParent().loadClass(name);
                } catch (ClassNotFoundException e) {
                    c = null;
                }
            }
            if (c == null) throw new ClassNotFoundException("Class not found: " + name);
        }
        if (resolve) {

            resolveClass(c);
        }
        return c;
    }
}