| // Copyright 2009 The Apache Software Foundation |
| // |
| // Licensed 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.tapestry5.internal.pageload; |
| |
| import org.apache.tapestry5.internal.structure.BodyPageElement; |
| import org.apache.tapestry5.internal.structure.ComponentPageElement; |
| import org.apache.tapestry5.internal.structure.Page; |
| import org.apache.tapestry5.ioc.Location; |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.ioc.internal.util.TapestryException; |
| import org.apache.tapestry5.ioc.util.Stack; |
| import org.apache.tapestry5.runtime.RenderCommand; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * Mutable data used when {@link org.apache.tapestry5.internal.pageload.ComponentAssembler}s are assembling a page |
| * instance. |
| */ |
| class PageAssembly |
| { |
| final Page page; |
| |
| final Stack<ComponentPageElement> activeElement = CollectionFactory.newStack(); |
| |
| final Stack<BodyPageElement> bodyElement = CollectionFactory.newStack(); |
| |
| final Stack<ComponentPageElement> createdElement = CollectionFactory.newStack(); |
| |
| final Stack<ComponentName> componentName = CollectionFactory.newStack(); |
| |
| final Stack<EmbeddedComponentAssembler> embeddedAssembler = CollectionFactory.newStack(); |
| |
| final List<PageAssemblyAction> deferred = CollectionFactory.newList(); |
| |
| private final Set<String> flags = CollectionFactory.newSet(); |
| |
| PageAssembly(Page page) |
| { |
| this.page = page; |
| } |
| |
| /** |
| * Adds the command to the top element of the {@link #bodyElement} stack. {@linkplain |
| * #flushComposableRenderCommands() Flushes} composable render commands first. |
| * |
| * @param command |
| */ |
| void addRenderCommand(RenderCommand command) |
| { |
| bodyElement.peek().addToBody(command); |
| } |
| |
| boolean checkAndSetFlag(String flagName) |
| { |
| boolean result = flags.contains(flagName); |
| |
| if (!result) |
| flags.add(flagName); |
| |
| return result; |
| } |
| |
| void checkForRecursion(String componentClassName, Location location) |
| { |
| for (Object o : activeElement.getSnapshot()) |
| { |
| ComponentPageElement e = (ComponentPageElement) o; |
| |
| if (e.getComponentResources().getComponentModel().getComponentClassName().equals(componentClassName)) |
| { |
| throw new TapestryException( |
| PageloadMessages.recursiveTemplate(componentClassName), |
| location, |
| null); |
| } |
| } |
| } |
| } |
| |
| |