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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2012 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
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 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
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 */
package org.glassfish.hk2.utilities;

import org.glassfish.hk2.api.HK2Loader;
import org.glassfish.hk2.api.MultiException;

/**
 * This is an implementation of an {@link HK2Loader} that uses
 * a given classloader
 * 
 * @author jwells
 */
public class HK2LoaderImpl implements HK2Loader {
    private final ClassLoader loader;
    
    /**
     * Initializes this HK2Loader with the system classloader
     */
    public HK2LoaderImpl() {
        this(ClassLoader.getSystemClassLoader());
    }
    
    /**
     * Initializes this HK2Loader with the given ClassLoader
     * 
     * @param loader The non-null classloader to use with this
     * HK2Loader
     */
    public HK2LoaderImpl(ClassLoader loader) {
        if (loader == null) throw new IllegalArgumentException();
        
        this.loader = loader;
    }

    /* (non-Javadoc)
     * @see org.glassfish.hk2.api.HK2Loader#loadClass(java.lang.String)
     */
    @Override
    public Class loadClass(String className) throws MultiException {
        try {
            return loader.loadClass(className);
        }
        catch (Exception e) {
            throw new MultiException(e);
        }
    }
    
    public String toString() {
        return "HK2LoaderImpl(" + loader + ")";
    }

}