| /* |
| * $Id$ |
| * |
| * 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.request.velocity.autotag; |
| |
| import java.io.Writer; |
| import java.util.Map; |
| import javax.servlet.ServletContext; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| import org.apache.tiles.autotag.core.runtime.ModelBody; |
| import org.apache.tiles.autotag.core.runtime.AutotagRuntime; |
| import org.apache.tiles.request.Request; |
| import org.apache.tiles.request.servlet.ServletUtil; |
| import org.apache.tiles.request.velocity.VelocityRequest; |
| import org.apache.velocity.context.InternalContextAdapter; |
| import org.apache.velocity.runtime.directive.Directive; |
| import org.apache.velocity.runtime.parser.node.ASTBlock; |
| import org.apache.velocity.runtime.parser.node.ASTMap; |
| import org.apache.velocity.runtime.parser.node.Node; |
| import org.apache.velocity.tools.view.ViewContext; |
| |
| /** |
| * A Runtime for implementing Velocity Directives. |
| */ |
| public class VelocityAutotagRuntime extends Directive implements AutotagRuntime<Request> { |
| private InternalContextAdapter context; |
| private Writer writer; |
| private Node node; |
| private Map<String, Object> params; |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Request createRequest() { |
| ViewContext viewContext = (ViewContext) context.getInternalUserContext(); |
| HttpServletRequest request = viewContext.getRequest(); |
| HttpServletResponse response = viewContext.getResponse(); |
| ServletContext servletContext = viewContext.getServletContext(); |
| return VelocityRequest.createVelocityRequest(ServletUtil.getApplicationContext(servletContext), |
| request, |
| response, |
| context, |
| writer); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public ModelBody createModelBody() { |
| ASTBlock block = (ASTBlock) node.jjtGetChild(1); |
| return new VelocityModelBody(context, block, writer); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| @SuppressWarnings("unchecked") |
| public <T> T getParameter(String name, Class<T> type, T defaultValue) { |
| if (params == null) { |
| ASTMap astMap = (ASTMap) node.jjtGetChild(0); |
| params = (Map<String, Object>) astMap.value(context); |
| } |
| T result = (T) params.get(name); |
| if (result == null) { |
| result = defaultValue; |
| } |
| return result; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String getName() { |
| return null; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int getType() { |
| return 0; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean render(InternalContextAdapter context, Writer writer, Node node) { |
| this.context = context; |
| this.writer = writer; |
| this.node = node; |
| return false; |
| } |
| |
| } |