| // Copyright 2008 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.structure; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.tapestry5.ComponentEventCallback; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.Renderable; |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.runtime.RenderCommand; |
| import org.apache.tapestry5.runtime.RenderQueue; |
| |
| /** |
| * Used by {@link org.apache.tapestry5.internal.structure.ComponentPageElementImpl} to track the results of invoking the |
| * component methods for a render phase event. |
| * |
| * @since 5.0.19 |
| */ |
| class RenderPhaseEventHandler implements ComponentEventCallback |
| { |
| private final RenderQueue renderQueue; |
| |
| private boolean result = true; |
| |
| private List<RenderCommand> commands; |
| |
| public RenderPhaseEventHandler(RenderQueue renderQueue) |
| { |
| this.renderQueue = renderQueue; |
| } |
| |
| boolean getResult() |
| { |
| return result; |
| } |
| |
| void reset() |
| { |
| if (commands != null) |
| { |
| for (RenderCommand command : commands) |
| renderQueue.push(command); |
| } |
| |
| result = true; |
| |
| commands = null; |
| } |
| |
| public boolean handleResult(Object result) |
| { |
| if (result instanceof Boolean) |
| { |
| this.result = (Boolean) result; |
| return true; // abort other handler methods |
| } |
| |
| if (result instanceof RenderCommand) |
| { |
| RenderCommand command = (RenderCommand) result; |
| |
| add(command); |
| |
| return false; // do not abort! |
| } |
| |
| if (result instanceof Renderable) |
| { |
| final Renderable renderable = (Renderable) result; |
| |
| RenderCommand wrapper = new RenderCommand() |
| { |
| public void render(MarkupWriter writer, RenderQueue queue) |
| { |
| renderable.render(writer); |
| } |
| }; |
| |
| add(wrapper); |
| |
| return false; |
| } |
| |
| throw new RuntimeException(StructureMessages.wrongPhaseResultType(Arrays.asList(Boolean.class.getName(), |
| Renderable.class.getName(), RenderCommand.class.getName()))); |
| } |
| |
| private void add(RenderCommand command) |
| { |
| if (commands == null) |
| commands = CollectionFactory.newList(); |
| |
| commands.add(command); |
| } |
| |
| } |