sanders 02/01/09 12:26:05 Added: digester/src/java/org/apache/commons/digester SetRootRule.java Log: Handy rule for acessing the root object in the stack. Revision Changes Path 1.1 jakarta-commons/digester/src/java/org/apache/commons/digester/SetRootRule.java Index: SetRootRule.java =================================================================== /* * $Header: /home/cvs/jakarta-commons/digester/src/java/org/apache/commons/digester/SetRootRule.java,v 1.1 2002/01/09 20:26:05 sanders Exp $ * $Revision: 1.1 $ * $Date: 2002/01/09 20:26:05 $ * * ==================================================================== * * The Apache Software License, Version 1.1 * * Copyright (c) 1999-2002 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", "Commons", 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 [EMAIL PROTECTED] * * 5. Products derived from this software may not be called "Apache" * nor may "Apache" appear in their names without prior written * permission of the Apache Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * 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/>. * */ package org.apache.commons.digester; import java.lang.ClassLoader; import java.lang.reflect.Method; import org.xml.sax.Attributes; import org.apache.commons.beanutils.MethodUtils; /** * Rule implementation that calls a method on the root object on the stack, * passing the top object (child) as an argument. * * @author Scott Sanders * @version $Revision: 1.1 $ $Date: 2002/01/09 20:26:05 $ */ public class SetRootRule extends Rule { // ----------------------------------------------------------- Constructors /** * Construct a "set root" rule with the specified method name. The * method's argument type is assumed to be the class of the * child object. * * @param digester The associated Digester * @param methodName Method name of the parent method to call */ public SetRootRule(Digester digester, String methodName) { this(digester, methodName, null); } /** * Construct a "set next" rule with the specified method name. * * @param digester The associated Digester * @param methodName Method name of the parent method to call * @param paramType Java class of the parent method's argument * (if you wish to use a primitive type, specify the corresonding * Java wrapper class instead, such as <code>java.lang.Boolean</code> * for a <code>boolean</code> parameter) */ public SetRootRule(Digester digester, String methodName, String paramType) { super(digester); this.methodName = methodName; this.paramType = paramType; } // ----------------------------------------------------- Instance Variables /** * The method name to call on the parent object. */ protected String methodName = null; /** * The Java class name of the parameter type expected by the method. */ protected String paramType = null; // --------------------------------------------------------- Public Methods /** * Process the end of this element. */ public void end() throws Exception { // Identify the objects to be used Object child = digester.peek(0); Object parent = digester.root; if (digester.log.isDebugEnabled()) { if (parent == null) { digester.log.debug("Call [NULL ROOT]." + methodName + "(" + child + ")"); } else { digester.log.debug("Call " + parent.getClass().getName() + "." + methodName + "(" + child + ")"); } } // Call the specified method Class paramTypes[] = new Class[1]; if (paramType != null) { paramTypes[0] = digester.getClassLoader().loadClass(paramType); } else { paramTypes[0] = child.getClass(); } MethodUtils.invokeExactMethod(parent, methodName, new Object[]{ child }, paramTypes); } /** * Render a printable version of this Rule. */ public String toString() { StringBuffer sb = new StringBuffer("SetRootRule["); sb.append("methodName="); sb.append(methodName); sb.append(", paramType="); sb.append(paramType); sb.append("]"); return (sb.toString()); } }
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