001    // Copyright 2009 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.tapestry5.internal.services;
016    
017    import org.apache.tapestry5.model.ComponentModel;
018    
019    /**
020     * Access to component models (as provided via {@link org.apache.tapestry5.internal.services.ComponentInstantiatorSource}).
021     * <p/>
022     * This is a good candidate to move into the public services package.
023     *
024     * @since 5.1.0.0
025     */
026    public interface ComponentModelSource
027    {
028        /**
029         * Returns the model for a particular component class name.
030         *
031         * @param componentClassName name of component class
032         * @return model for component
033         * @throws IllegalArgumentException if component class name does not match a known component
034         */
035        ComponentModel getModel(String componentClassName);
036    
037        /**
038         * Returns the model for a page.  The page name is resolved to a component class name.
039         *
040         * @param pageName name of page
041         * @return the model for the page
042         * @throws IllegalArgumentException if the page name is not a known page name
043         */
044        ComponentModel getPageModel(String pageName);
045    }