Commons Digester example source code file (DigesterLoaderRulesTest.java)

This example Commons Digester source code file (DigesterLoaderRulesTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Commons Digester tags/keywords

callparamtestobject, callparamtestobject, datafortheparentobject, digester, digesterloaderrulestest, exception, inputsource, inputsource, io, parent, sax, string, string, stringreader, stringreader, test

The Commons Digester DigesterLoaderRulesTest.java source code

/* $Id: DigesterLoaderRulesTest.java 992060 2010-09-02 19:09:47Z simonetripodi $
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.commons.digester.xmlrules;

import static org.junit.Assert.*;

import java.io.StringReader;

import org.apache.commons.digester.Digester;
import org.junit.Test;
import org.xml.sax.InputSource;

/**
 * Tests for digester loader rule implementations,
 *
 * @author Robert Burrell Donkin
 */

public class DigesterLoaderRulesTest {

    @Test
    /** Basic test for object param rule */
    public void testObjectParamRule() throws Exception {
        String xmlRules = 
            "<?xml version='1.0'?>" +
            "<digester-rules>" + 
            "  <pattern value='root'>" +
            "     <pattern value='foo'>" +
            "        <call-method-rule " +
            "                methodname='duo' " +
            "                paramcount='2' " +
            "                paramtypes='java.lang.String,java.lang.String'/>" +
            "        <pattern value='bar'>" +
            "           <object-param-rule paramnumber='0' type='java.lang.String' />" +
            "        </pattern>" +
            "        <pattern value='rab'>" +
            "           <object-param-rule paramnumber='1' type='java.lang.String' value='tester.test' />" +
            "        </pattern>" +
            "     </pattern>" +
            "   </pattern>" +
            "</digester-rules>";
        
        String xml = 
            "<?xml version='1.0'?>" + 
            "<root>" +
            "  <foo>" +
            "    <bar/>" +
            "    <rab/>" +
            "  </foo>" +
            "</root>";
            
        CallParamTestObject testObject = new CallParamTestObject();
        Digester digester = DigesterLoader.createDigester(new InputSource(new StringReader(xmlRules)));
        digester.push(testObject);    
        digester.parse(new InputSource(new StringReader(xml)));
        assertEquals("First param", "", testObject.getLeft());
        assertEquals("Param with default set", "tester.test", testObject.getRight());
    }
    
    /** Test for call method rule with target offset */
    @Test
    public void testCallMethodRuleTargetOffset() throws Exception {
        String xmlRules = 
            "<?xml version='1.0'?>" +
            "<digester-rules>" + 
            "  <pattern value='root'>" +
            "     <pattern value='call-top-object'>" +
            "        <call-method-rule " +
            "                methodname='setMiddle' " +
            "                targetoffset='0' " +
            "                paramcount='1' " +
            "                paramtypes='java.lang.String' />" +
            "        <call-param-rule paramnumber='0' />" +
            "     </pattern>" +
            "     <pattern value='call-parent-object'>" +
            "        <call-method-rule " +
            "                methodname='setLeft' " +
            "                targetoffset='1' " +
            "                paramcount='1' " +
            "                paramtypes='java.lang.String' />" +
            "        <call-param-rule paramnumber='0' />" +
            "     </pattern>" +
            "     <pattern value='call-root-object'>" +
            "        <call-method-rule " +
            "                methodname='setRight' " +
            "                targetoffset='-1' " +
            "                paramcount='1' " +
            "                paramtypes='java.lang.String' />" +
            "        <call-param-rule paramnumber='0' />" +
            "     </pattern>" +
            "   </pattern>" +
            "</digester-rules>";
        
        String xml = 
            "<?xml version='1.0'?>" + 
            "<root>" +
            "  <call-top-object>DataForTheTopObject" +
            "  <call-parent-object>DataForTheParentObject" +
            "  <call-root-object>DataForTheRootObject" +
            "</root>";
            
        CallParamTestObject testObjectA = new CallParamTestObject();
        CallParamTestObject testObjectB = new CallParamTestObject();
        CallParamTestObject testObjectC = new CallParamTestObject();
        Digester digester = DigesterLoader.createDigester(new InputSource(new StringReader(xmlRules)));
        digester.push( testObjectA );
        digester.push( testObjectB );
        digester.push( testObjectC );
        digester.parse(new InputSource(new StringReader(xml)));
        
        assertEquals("Top object invoked", "DataForTheTopObject", testObjectC.getMiddle());
        assertEquals("Parent object invoked", "DataForTheParentObject", testObjectB.getLeft());
        assertEquals("Root object invoked", "DataForTheRootObject", testObjectA.getRight());

    }
}