bsfmanagerfilter.java

struts框架的script版本． 用于学习strust框架

/*
 * $Id: BSFManagerFilter.java 357368 2005-12-17 19:17:51Z mrdon $
 *
 * Copyright 2000-2004 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.struts.scripting;

// util imports:
import java.util.Properties;

// misc imports:
import org.apache.bsf.BSFManager;


/**
 *  Defines a class that wants to manipulate the contents of the scripting
 *  context before the script is executed. An example would be a class that puts
 *  business facade classes in the context.
 */
public interface BSFManagerFilter {

    /**
     *  Initializes the filter. Properties can be retrieved as: <code>
     *  struts-scripting.filters.FILTER_NAME.PROPERTY_NAME=PROPERTY_VALUE
     *  </code> where FILTER_NAME is the "name" parameter.
     *
     *@param  name   The name of the filter
     *@param  props  The properties
     */
    void init(String name, Properties props);


    /**
     *  Applies the filter.
     *
     *@param  mgr  The scripting manager
     *@return      The scripting manager
     */
    BSFManager apply(BSFManager mgr);
}