forked from External/mage
77 lines
2.8 KiB
Java
77 lines
2.8 KiB
Java
/*
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* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are those of the
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* authors and should not be interpreted as representing official policies, either expressed
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* or implied, of BetaSteward_at_googlemail.com.
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*/
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package mage.server.util;
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import java.net.URL;
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import java.net.URLClassLoader;
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/**
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*
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* @author BetaSteward_at_googlemail.com
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*
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* some code courtesy of http://tech.puredanger.com/2006/11/09/classloader/
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*
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*/
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public class PluginClassLoader extends URLClassLoader {
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public PluginClassLoader(){
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super(new URL[0], PluginClassLoader.class.getClassLoader());
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}
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@Override
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public void addURL(URL url) {
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super.addURL(url);
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}
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@Override
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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// First check whether it's already been loaded, if so use it
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Class loadedClass = findLoadedClass(name);
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// Not loaded, try to load it
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if (loadedClass == null) {
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try {
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// Ignore parent delegation and just try to load locally
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loadedClass = findClass(name);
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} catch (ClassNotFoundException e) {
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// Swallow exception - does not exist locally
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}
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// If not found locally, use normal parent delegation in URLClassloader
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if (loadedClass == null) {
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// throws ClassNotFoundException if not found in delegation hierarchy at all
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loadedClass = super.loadClass(name);
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}
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}
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// will never return null (ClassNotFoundException will be thrown)
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return loadedClass;
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}
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}
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