http://commons.apache.org/digester/: The Digester package lets you configure an XML to Java object mapping module which triggers certain actions called rules whenever a particular pattern of nested XML elements is recognized. (The Apache Software Foundation)
  • Bradley M. Handy
  • Christopher Lenz
  • Ted Husted
  • David H. Martin
  • Henri Chen
  • Janek Bogucki
  • Mark Huisman
  • Paul Jack
  • Anton Maslovsky
  • Matt Cleveland
  • Gabriele Carcassi
  • Wendy Smoak
  • Kevin Ross
  • Craig McClanahan
  • Robert Burrell Donkin
  • Scott Sanders
  • James Strachan
  • Jason van Zyl
  • Tim OBrien
  • Jean-Francois Arcand
  • Simon Kitching
  • Rahul Akolkar
  • Simone Tripodi 
/* $Id: RuleLoader.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 org.apache.commons.digester.Digester;


Interface for classes which can dynamically load custom
plugin rules associated with a user's plugin class.


Each plugin declaration has an associated RuleLoader instance, and that
instance's addRules method is invoked each time the input xml specifies
that an instance of that plugged-in class is to be created.


This is an abstract class rather than an interface in order to make
it possible to enhance this class in future without breaking binary
compatibility; it is possible to add methods to an abstract class, but
not to an interface. 

Since:1.6
/**
 * Interface for classes which can dynamically load custom
 * plugin rules associated with a user's plugin class.
 * <p>
 * Each plugin declaration has an associated RuleLoader instance, and that
 * instance's addRules method is invoked each time the input xml specifies
 * that an instance of that plugged-in class is to be created.
 * <p>
 * This is an abstract class rather than an interface in order to make
 * it possible to enhance this class in future without breaking binary
 * compatibility; it is possible to add methods to an abstract class, but
 * not to an interface. 
 *
 * @since 1.6
 */

public abstract class RuleLoader {
    
    
Configures the digester with custom rules for some plugged-in
class.


This method is invoked when the start of an xml tag is encountered
which maps to a PluginCreateRule. Any rules added here are removed
from the digester when the end of that xml tag is encountered.

/**
     * Configures the digester with custom rules for some plugged-in
     * class.
     * <p>
     * This method is invoked when the start of an xml tag is encountered
     * which maps to a PluginCreateRule. Any rules added here are removed
     * from the digester when the end of that xml tag is encountered.
     */
    public abstract void addRules(Digester d, String path) throws PluginException;
}