Commons Digester example source code file (TestXmlRuleInfo.java)

This example Commons Digester source code file (TestXmlRuleInfo.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

digester, digester, exception, io, object, objecttestimpl, objecttestimpl, plugincreaterule, plugindeclarationrule, plugindeclarationrule, pluginrules, pluginrules, stringbuffer, test, testxmlruleinfo

The Commons Digester TestXmlRuleInfo.java source code

/* $Id: TestXmlRuleInfo.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.plugins;

import static org.junit.Assert.*;

import java.io.StringReader;

import org.apache.commons.digester.Digester;
import org.junit.Test;

/**
 * Test cases for the declaration of custom rules for a plugin using
 * xmlrules format files.
 */

public class TestXmlRuleInfo {

    // --------------------------------------------------------------- Test cases
    @Test
    public void testXmlRuleInfoExplicitFile() throws Exception {
        // * tests that custom rules can be declared on a 
        //   separate class by explicitly declaring a file containing
        //   the rules, using a relative or absolute path name.
        
        StringBuffer input = new StringBuffer();
        input.append("<root>");
        input.append(" <plugin");
        input.append("  id='testobject'"); 
        input.append("  class='org.apache.commons.digester.plugins.ObjectTestImpl'");
        input.append("  file='src/test/resources/org/apache/commons/digester/plugins/xmlrules1.xml'");
        input.append("  />");
        input.append("  <object plugin-id='testobject'/>");
        input.append("</root>");

        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules(rc);
        
        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule("root/plugin", pdr);
        
        PluginCreateRule pcr = new PluginCreateRule(ObjectTestImpl.class);
        digester.addRule("root/object", pcr);
        
        try {
            digester.parse(new StringReader(input.toString()));
        }
        catch(Exception e) {
            throw e;
        }

        Object root = digester.getRoot();
        assertEquals(ObjectTestImpl.class, root.getClass());
        ObjectTestImpl testObject = (ObjectTestImpl) root;
        assertEquals("xmlrules1", testObject.getValue());
    }

    @Test
    public void testXmlRuleInfoExplicitResource() throws Exception {
        // * tests that custom rules can be declared on a 
        //   separate class by explicitly declaring the rule class.
        //   and explicitly declaring a file which is somewhere in the 
        //   classpath.

        StringBuffer input = new StringBuffer();
        input.append("<root>");
        input.append(" <plugin");
        input.append("  id='testobject'"); 
        input.append("  class='org.apache.commons.digester.plugins.ObjectTestImpl'");
        input.append("  resource='org/apache/commons/digester/plugins/xmlrules2.xml'");
        input.append("  />");
        input.append("  <object plugin-id='testobject'/>");
        input.append("</root>");

        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules(rc);
        
        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule("root/plugin", pdr);
        
        PluginCreateRule pcr = new PluginCreateRule(ObjectTestImpl.class);
        digester.addRule("root/object", pcr);

        try {
            digester.parse(new StringReader(input.toString()));
        }
        catch(Exception e) {
            throw e;
        }

        Object root = digester.getRoot();
        assertEquals(ObjectTestImpl.class, root.getClass());
        ObjectTestImpl testObject = (ObjectTestImpl) root;
        assertEquals("xmlrules2", testObject.getValue());
    }

    @Test
    public void testXmlRuleImplicitResource() throws Exception {
        // * tests that custom rules can be declared on a 
        //   separate class by explicitly declaring the rule class.
        //   and explicitly declaring a file which is somewhere in the 
        //   classpath.

        StringBuffer input = new StringBuffer();
        input.append("<root>");
        input.append(" <plugin");
        input.append("  id='testobject'"); 
        input.append("  class='org.apache.commons.digester.plugins.ObjectTestImpl'");
        input.append("  />");
        input.append("  <object plugin-id='testobject'/>");
        input.append("</root>");

        Digester digester = new Digester();
        PluginRules rc = new PluginRules();
        digester.setRules(rc);
        
        PluginDeclarationRule pdr = new PluginDeclarationRule();
        digester.addRule("root/plugin", pdr);
        
        PluginCreateRule pcr = new PluginCreateRule(ObjectTestImpl.class);
        digester.addRule("root/object", pcr);

        try {
            digester.parse(new StringReader(input.toString()));
        }
        catch(Exception e) {
            throw e;
        }

        Object root = digester.getRoot();
        assertEquals(ObjectTestImpl.class, root.getClass());
        ObjectTestImpl testObject = (ObjectTestImpl) root;
        assertEquals("xmlrules-ruleinfo", testObject.getValue());
    }
}