001    // Copyright 2011 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.services.dynamic;
016    
017    import org.apache.tapestry5.Block;
018    import org.apache.tapestry5.ComponentResources;
019    import org.apache.tapestry5.corelib.components.Dynamic;
020    
021    /**
022     * Used by implementations of {@link DynamicTemplate} to obtain {@link Block}s as replacements
023     * for elements within the template. The Blocks are passed to the {@link Dynamic} component as informal parameters.
024     * 
025     * @since 5.3
026     */
027    public interface DynamicDelegate
028    {
029        /**
030         * Returns the component resources (i.e., the {@link Dynamic} component), used when creating bindings for expansions
031         * located inside the dynamic template.
032         */
033        ComponentResources getComponentResources();
034    
035        /**
036         * Returns the Block with the given unique name.
037         * 
038         * @throws RuntimeException
039         *             if no such block exists
040         */
041        Block getBlock(String name);
042    }