001    // Copyright 2004, 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.services;
016    
017    /**
018     * Starting with 4.0, copmonents do not always have a zero-args constructor; the enhanced subclass
019     * may take some parameters used to initialize instance variables. This interface represents a
020     * wrapper around a constructor and an array of parameters that can be used to stamp out new
021     * instances of a component.
022     * 
023     * @author Howard M. Lewis Ship
024     * @since 4.0
025     */
026    public interface ComponentConstructor
027    {
028        /**
029         * Requests that a new instance of the component.
030         */
031    
032        Object newInstance();
033    
034        /**
035         * Returns the class actually instantiated (which may be an enhanced subclass).
036         */
037        Class getComponentClass();
038    }