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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2008-2010 Oracle and/or its affiliates. All rights reserved.
 *
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 * 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
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 * or packager/legal/LICENSE.txt.  See the License for the specific
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package com.sun.enterprise.connectors.util;

import com.sun.enterprise.connectors.ConnectorRuntime;

public class ClassLoadingUtility {

    /**
     * Get the current thread's context class loader which is set to
     * the CommonClassLoader by ApplicationServer
     *
     * @return the thread's context classloader if it exists;
     *         else the system class loader.
     */
    private static ClassLoader getClassLoader() {
        if (Thread.currentThread().getContextClassLoader() != null) {
            return Thread.currentThread().getContextClassLoader();
        } else {
            return ClassLoader.getSystemClassLoader();
        }
    }

    /**
     * Loads the class with the common class loader.
     *
     * @param the class name
     * @return the loaded class
     * @throws if the class is not found.
     * @see getClassLoader()
     */
    public static Class loadClass(String className) throws ClassNotFoundException {
        try{
            return getClassLoader().loadClass(className);
        }catch(Exception e){
            //try loading the class using common classloader (connector classloader's parent chain has common classloader)
            return ConnectorRuntime.getRuntime().getConnectorClassLoader().loadClass(className);
        }
    }
}