001    // Copyright 2005 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    //     http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry.web;
016    
017    import java.util.List;
018    
019    /**
020     * Defines methods for accessing initialization parameters.
021     * 
022     * @author Howard M. Lewis Ship
023     * @since 4.0
024     */
025    public interface InitializationParameterHolder
026    {
027        /**
028         * Returns a sorted list of the names of all initialization parameters (which may be the empty
029         * list).
030         * 
031         * @return List of String
032         */
033    
034        List getInitParameterNames();
035    
036        /**
037         * Returns the value of the named parameter, or null if the reciever does not have such a
038         * parameter.
039         * 
040         * @param name
041         *            the name of the parameter to retrieve
042         * @return the corresponding value, or null
043         */
044    
045        String getInitParameterValue(String name);
046    }