/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.xml.internal.bind.util;

import java.net.URL;

/**

 * Finds out where a class file is loaded from.

 *

 * @author

 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)

 */

public class Which {

    public static String which( Class clazz ) {

        return which( clazz.getName(), SecureLoader.getClassClassLoader(clazz));

    }

    /**

     * Search the specified classloader for the given classname.

     * @param classname the fully qualified name of the class to search for

     * @param loader the classloader to search

     * @return the source location of the resource, or null if it wasn't found

     */

    public static String which(String classname, ClassLoader loader) {

        String classnameAsResource = classname.replace('.', '/') + ".class";

        if(loader == null) {

            loader = SecureLoader.getSystemClassLoader();

        }

        URL it = loader.getResource(classnameAsResource);

        if (it != null) {

            return it.toString();

        } else {

            return null;

        }

    }

}