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/*
 * Fabric3
 * Copyright (c) 2009-2013 Metaform Systems
 *
 * Fabric3 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version, with the
 * following exception:
 *
 * Linking this software statically or dynamically with other
 * modules is making a combined work based on this software.
 * Thus, the terms and conditions of the GNU General Public
 * License cover the whole combination.
 *
 * As a special exception, the copyright holders of this software
 * give you permission to link this software with independent
 * modules to produce an executable, regardless of the license
 * terms of these independent modules, and to copy and distribute
 * the resulting executable under terms of your choice, provided
 * that you also meet, for each linked independent module, the
 * terms and conditions of the license of that module. An
 * independent module is a module which is not derived from or
 * based on this software. If you modify this software, you may
 * extend this exception to your version of the software, but
 * you are not obligated to do so. If you do not wish to do so,
 * delete this exception statement from your version.
 *
 * Fabric3 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 General Public License for more details.
 *
 * You should have received a copy of the
 * GNU General Public License along with Fabric3.
 * If not, see .
 *
 * ----------------------------------------------------
 *
 * Portions originally based on Apache Tuscany 2007
 * licensed under the Apache 2.0 license.
 *
 */
package org.fabric3.fabric.classloader;

import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import org.fabric3.spi.classloader.ClassLoaderRegistry;

/**
 * Implementation of a registry for classloaders.
 */
public class ClassLoaderRegistryImpl implements ClassLoaderRegistry {
    private final Map registry = new ConcurrentHashMap();
    private static final Map> PRIMITIVES;

    static {
        PRIMITIVES = new HashMap>();
        PRIMITIVES.put("boolean", Boolean.TYPE);
        PRIMITIVES.put("byte", Byte.TYPE);
        PRIMITIVES.put("short", Short.TYPE);
        PRIMITIVES.put("int", Integer.TYPE);
        PRIMITIVES.put("long", Long.TYPE);
        PRIMITIVES.put("float", Float.TYPE);
        PRIMITIVES.put("double", Double.TYPE);
        PRIMITIVES.put("void", Void.TYPE);
    }

    public synchronized void register(URI id, ClassLoader classLoader) {
        if (registry.containsKey(id)) {
            throw new AssertionError("Duplicate class loader: " + id);
        }
        registry.put(id, classLoader);
    }

    public ClassLoader unregister(URI id) {
        return registry.remove(id);
    }

    public ClassLoader getClassLoader(URI id) {
        return registry.get(id);
    }

    public Map getClassLoaders() {
        return registry;
    }

    public Class loadClass(URI classLoaderId, String className) throws ClassNotFoundException {
        ClassLoader cl = getClassLoader(classLoaderId);
        return loadClass(cl, className);
    }

    public Class loadClass(ClassLoader cl, String className) throws ClassNotFoundException {
        Class clazz = PRIMITIVES.get(className);
        if (clazz == null) {
            clazz = Class.forName(className, true, cl);
        }
        return clazz;
    }

}