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
015package org.apache.tapestry5.services.dynamic;
016
017import org.apache.tapestry5.corelib.components.Dynamic;
018import org.apache.tapestry5.runtime.RenderCommand;
019
020/**
021 * A dynamic template is used by the {@link Dynamic} component to allow
022 * a component to significantly alter its presentation at runtime. An external
023 * template file provides most of the rendered content.
024 * 
025 * @since 5.3
026 * @see DynamicTemplateParser
027 */
028public interface DynamicTemplate
029{
030    /**
031     * Given a delegate (to assist with locating Blocks and evaluating expressions) ... create a
032     * RenderCommand that can be returned from a render phase method.
033     */
034    RenderCommand createRenderCommand(DynamicDelegate delegate);
035}