copyparentclassloaderrule.java

This temp directory is used by the JVM for temporary file storage. The JVM is configured to use thi

/*
 * $Header: /home/cvs/jakarta-tomcat-catalina/catalina/src/share/org/apache/catalina/startup/CopyParentClassLoaderRule.java,v 1.2 2004/01/25 20:57:18 remm Exp $
 * $Revision: 1.2 $
 * $Date: 2004/01/25 20:57:18 $
 *
 * ====================================================================
 *
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999-2001 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
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 * 5. Products derived from this software may not be called "Apache"
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
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 */


package org.apache.catalina.startup;


import java.lang.reflect.Method;
import org.apache.catalina.Container;
import org.apache.commons.digester.Rule;
import org.xml.sax.Attributes;


/**
 * <p>Rule that copies the <code>parentClassLoader</code> property from the
 * next-to-top item on the stack (which must be a <code>Container</code>)
 * to the top item on the stack (which must also be a
 * <code>Container</code>).</p>
 *
 * @author Craig R. McClanahan
 * @version $Revision: 1.2 $ $Date: 2004/01/25 20:57:18 $
 */

public class CopyParentClassLoaderRule extends Rule {


    // ----------------------------------------------------------- Constructors


    /**
     * Construct a new instance of this Rule.
     *
     * @param digester Digester we are associated with
     */
    public CopyParentClassLoaderRule() {
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Handle the beginning of an XML element.
     *
     * @param attributes The attributes of this element
     *
     * @exception Exception if a processing error occurs
     */
    public void begin(String namespace, String name, Attributes attributes)
        throws Exception {

        if (digester.getLogger().isDebugEnabled())
            digester.getLogger().debug("Copying parent class loader");
        Container child = (Container) digester.peek(0);
        Object parent = digester.peek(1);
        Method method =
            parent.getClass().getMethod("getParentClassLoader", new Class[0]);
        ClassLoader classLoader =
            (ClassLoader) method.invoke(parent, new Object[0]);
        child.setParentClassLoader(classLoader);

    }


}