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The source code

/*
 * Copyright 1999-2004 The Apache Software Foundation
 *
 * Licensed 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.jxpath;

/**
 * A generic mechanism for accessing collections of name/value pairs.
 * Examples of such collections are HashMap, Properties,
 * ServletContext.  In order to add support for a new such collection
 * type to JXPath, perform the following two steps:
 * 
    *
  1. Build an implementation of the DynamicPropertyHandler interface * for the desired collection type.
  2. *
  3. Invoke the static method {@link JXPathIntrospector#registerDynamicClass * JXPathIntrospector.registerDynamicClass(class, handlerClass)}
  4. *
* JXPath allows access to dynamic properties using these three formats: *
    *
  • "myMap/myKey"
  • *
  • "myMap[@name = 'myKey']"
  • *
  • "myMap[name(.) = 'myKey']"
  • *
* * @author Dmitri Plotnikov * @version $Revision: 1.5 $ $Date: 2004/02/29 14:17:42 $ */ public interface DynamicPropertyHandler { /** * Returns a list of dynamic property names for the supplied object. */ String[] getPropertyNames(Object object); /** * Returns the value of the specified dynamic property. */ Object getProperty(Object object, String propertyName); /** * Modifies the value of the specified dynamic property. */ void setProperty(Object object, String propertyName, Object value); }
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