| /* |
| * $Id$ |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package org.apache.tiles.template; |
| |
| import java.io.IOException; |
| import java.util.Deque; |
| |
| import org.apache.tiles.Attribute; |
| import org.apache.tiles.Definition; |
| import org.apache.tiles.access.TilesAccess; |
| import org.apache.tiles.autotag.core.runtime.ModelBody; |
| import org.apache.tiles.autotag.core.runtime.annotation.Parameter; |
| import org.apache.tiles.mgmt.MutableTilesContainer; |
| import org.apache.tiles.request.Request; |
| |
| /** |
| * <p> |
| * <strong>Create a definition at runtime. </strong> |
| * </p> |
| * <p> |
| * Create a new definition at runtime. Newly created definition will be |
| * available across the entire request. |
| * </p> |
| * |
| * @version $Rev$ $Date$ |
| * @since 2.2.0 |
| */ |
| public class DefinitionModel { |
| |
| /** |
| * Executes the operation. |
| * |
| * @param name The name of the definition to create. If not specified, an |
| * anonymous definition will be created. |
| * @param template The template of this definition. |
| * @param role A comma-separated list of roles. If present, the definition |
| * will be rendered only if the current user belongs to one of the roles. |
| * @param extendsParam The definition name that this definition extends. |
| * @param preparer The preparer to use to invoke before the definition is |
| * rendered. |
| * @param request The request. |
| * @param modelBody The body. |
| * @throws IOException If something goes wrong. |
| * @since 2.2.0 |
| */ |
| public void execute(String name, String template, String role, |
| @Parameter(name = "extends") String extendsParam, String preparer, |
| Request request, ModelBody modelBody) throws IOException { |
| Deque<Object> composeStack = ComposeStackUtil |
| .getComposeStack(request); |
| Definition definition = createDefinition(name, template, role, |
| extendsParam, preparer); |
| composeStack.push(definition); |
| modelBody.evaluateWithoutWriting(); |
| MutableTilesContainer container = (MutableTilesContainer) TilesAccess |
| .getCurrentContainer(request); |
| definition = (Definition) composeStack.pop(); |
| registerDefinition(definition, container, composeStack, request); |
| } |
| |
| /** |
| * Creates the definition to store. |
| * |
| * @param name The name of the definition to create. If not specified, an |
| * anonymous definition will be created. |
| * @param template The template of this definition. |
| * @param role A comma-separated list of roles. If present, the definition |
| * will be rendered only if the current user belongs to one of the roles. |
| * @param extendsParam The definition name that this definition extends. |
| * @param preparer The preparer to use to invoke before the definition is |
| * rendered. |
| * @return The created definition. |
| */ |
| private Definition createDefinition(String name, String template, |
| String role, String extendsParam, String preparer) { |
| Definition definition = new Definition(); |
| definition.setName(name); |
| Attribute templateAttribute = Attribute |
| .createTemplateAttribute(template); |
| templateAttribute.setRole(role); |
| definition.setTemplateAttribute(templateAttribute); |
| definition.setExtends(extendsParam); |
| definition.setPreparer(preparer); |
| return definition; |
| } |
| |
| /** |
| * Registers a definition in the container. |
| * |
| * @param definition The definition to register. |
| * @param container The container into which the definition will be |
| * registered. |
| * @param composeStack The compose stack, |
| * @param request The request. |
| */ |
| private void registerDefinition(Definition definition, |
| MutableTilesContainer container, Deque<Object> composeStack, |
| Request request) { |
| container.register(definition, request); |
| |
| if (composeStack.isEmpty()) { |
| return; |
| } |
| |
| Object obj = composeStack.peek(); |
| if (obj instanceof Attribute) { |
| Attribute attribute = (Attribute) obj; |
| attribute.setValue(definition.getName()); |
| if (attribute.getRenderer() == null) { |
| attribute.setRenderer("definition"); |
| } |
| } |
| } |
| } |