/* $Id: TestRecursion.java 1102402 2011-05-12 18:03:26Z 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.digester3.plugins;
import static org.junit.Assert.*;
import java.util.List;
import org.apache.commons.digester3.Digester;
import org.apache.commons.digester3.plugins.PluginCreateRule;
import org.apache.commons.digester3.plugins.PluginDeclarationRule;
import org.apache.commons.digester3.plugins.PluginRules;
import org.junit.Test;
/**
* Test cases for plugins with custom rules which include PluginCreateRule instances, allowing recursive datastructures
* to be processed.
*/
public class TestRecursion
{
// --------------------------------------------------------------- Test cases
@Test
public void testRecursiveRules()
throws Exception
{
// * tests that a rule can declare custom PluginCreateRules
// that allow it to plug in instances of itself below
// itself.
Digester digester = new Digester();
PluginRules rc = new PluginRules();
digester.setRules( rc );
PluginDeclarationRule pdr = new PluginDeclarationRule();
digester.addRule( "*/plugin", pdr );
PluginCreateRule pcr = new PluginCreateRule( Widget.class );
digester.addRule( "root/widget", pcr );
digester.addSetNext( "root/widget", "addChild" );
Container root = new Container();
digester.push( root );
try
{
digester.parse( Utils.getInputStream( this, "test6.xml" ) );
}
catch ( Exception e )
{
throw e;
}
int nDescendants = countWidgets( root );
assertEquals( 10, nDescendants );
}
private int countWidgets( Container c )
{
List<Widget> l = c.getChildren();
int sum = 0;
for ( Widget w : l )
{
++sum;
if ( w instanceof Container )
{
sum += countWidgets( (Container) w );
}
}
return sum;
}
}