org.bimserver.plugins.classloaders.DelegatingClassLoader Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of shared Show documentation
Shared libraries, common parent for both BIMserver and BimServerClientLib
There is a newer version: 2.0.0
package org.bimserver.plugins.classloaders;

/******************************************************************************
 * Copyright (C) 2009-2018  BIMserver.org
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see {@literal}.
 *****************************************************************************/

import java.net.URL;
import java.util.LinkedHashSet;
import java.util.Set;

import org.bimserver.utils.StringUtils;

public class DelegatingClassLoader extends PublicFindClassClassLoader {
	private final Set jarClassLoaders = new LinkedHashSet();
	
	public DelegatingClassLoader(ClassLoader parentClassLoader) {
		super(parentClassLoader);
	}

	public void add(PublicFindClassClassLoader jarClassLoader) {
		jarClassLoaders.add(jarClassLoader);
	}

	@Override
	protected Class loadClass(String name, boolean resolve) throws ClassNotFoundException {
		try {
			Class loadClass = super.loadClass(name, resolve);
			if (loadClass != null) {
				return loadClass;
			}
		} catch (ClassNotFoundException e) {
		}
		if (name.equals("com.logiclabs.node.common.NodeClientException")) {
			System.out.println();
		}
		for (PublicFindClassClassLoader jarClassLoader : jarClassLoaders) {
			if (jarClassLoader instanceof JarClassLoader) {
				Class findClass = jarClassLoader.findClass(name);
				if (findClass != null) {
					return findClass;
				}
			} else {
				try {
					Class findClass = jarClassLoader.loadClass(name);
					if (findClass != null) {
						return findClass;
					}
				} catch (ClassNotFoundException e) {
				}
			}
		}
		throw new ClassNotFoundException(name);
	}
	
	@Override
	public Class findClass(String name) throws ClassNotFoundException {
		for (PublicFindClassClassLoader jarClassLoader : jarClassLoaders) {
			try {
				Class findClass = jarClassLoader.findClass(name);
				if (findClass != null) {
					return findClass;
				}
			} catch (ClassNotFoundException e) {
			}
		}
		throw new ClassNotFoundException(name);
	}

	@Override
	public URL findResource(String name) {
		for (PublicFindClassClassLoader jarClassLoader : jarClassLoaders) {
			URL resource = jarClassLoader.findResource(name);
			if (resource != null) {
				return resource;
			}
		}
		return null;
	}

	public void dumpStructure(int indent) {
		System.out.print(StringUtils.gen("  ", indent));
		System.out.println("DelegatingClassLoader");
		ClassLoader parentLoader = getParent();
		if (parentLoader instanceof PublicFindClassClassLoader) {
			((PublicFindClassClassLoader)parentLoader).dumpStructure(indent + 1);
		}
		for (PublicFindClassClassLoader sub : jarClassLoaders) {
			sub.dumpStructure(indent + 1);
		}
	}
}