| /* |
| * $Id$ |
| * |
| * 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; |
| |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.Writer; |
| import java.util.Map; |
| |
| import javax.servlet.RequestDispatcher; |
| import javax.servlet.ServletException; |
| import javax.servlet.http.HttpServletRequest; |
| import javax.servlet.http.HttpServletResponse; |
| |
| import org.apache.tiles.request.AbstractViewRequest; |
| import org.apache.tiles.request.ApplicationContext; |
| import org.apache.tiles.request.WebRequest; |
| import org.apache.tiles.request.servlet.ExternalWriterHttpServletResponse; |
| import org.apache.tiles.request.servlet.ServletRequest; |
| import org.apache.tiles.request.servlet.ServletUtil; |
| import org.apache.velocity.context.Context; |
| |
| /** |
| * The implementation of the Tiles request context specific for Velocity. |
| * |
| * @version $Rev$ $Date$ |
| * @since 2.2.0 |
| */ |
| public class VelocityRequest extends AbstractViewRequest { |
| |
| /** |
| * The native available scopes, in fact only "page". |
| */ |
| private static final String[] SCOPES = {"page"}; |
| |
| /** |
| * The Velocity current context. |
| */ |
| private final Context ctx; |
| |
| /** |
| * The writer to use to render the response. It may be null, if not necessary. |
| */ |
| private Writer writer; |
| |
| /** |
| * The map of the page scope. |
| */ |
| private Map<String, Object> pageScope; |
| |
| /** |
| * Factory method to create a Velocity request. |
| * |
| * @param applicationContext The application context. |
| * @param request The request. |
| * @param response The response. |
| * @param velocityContext The Velocity context. |
| * @param writer The writer to write into. |
| * @return The request. |
| */ |
| public static VelocityRequest createVelocityRequest( |
| ApplicationContext applicationContext, HttpServletRequest request, |
| HttpServletResponse response, Context velocityContext, Writer writer) { |
| WebRequest servletRequest = new ServletRequest( |
| applicationContext, request, response); |
| VelocityRequest velocityRequest = new VelocityRequest( |
| servletRequest, velocityContext, writer); |
| return velocityRequest; |
| } |
| |
| /** |
| * Constructor. |
| * |
| * @param enclosedRequest The request that exposes non-Velocity specific properties |
| * @param ctx The Velocity current context. |
| * @param writer The writer to use to render the response. It may be null, if not necessary. |
| * @since 2.2.0 |
| */ |
| public VelocityRequest( |
| WebRequest enclosedRequest, Context ctx, Writer writer) { |
| super(enclosedRequest); |
| this.ctx = ctx; |
| this.writer = writer; |
| } |
| |
| @Override |
| public String[] getNativeScopes() { |
| return SCOPES; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected void doInclude(String path) throws IOException { |
| ServletRequest servletRequest = org.apache.tiles.request.servlet.ServletUtil.getServletRequest(this); |
| HttpServletRequest request = servletRequest.getRequest(); |
| HttpServletResponse response = servletRequest.getResponse(); |
| RequestDispatcher rd = request.getRequestDispatcher(path); |
| |
| if (rd == null) { |
| throw new IOException("No request dispatcher returned for path '" |
| + path + "'"); |
| } |
| |
| PrintWriter printWriter = getPrintWriter(); |
| try { |
| rd.include(request, new ExternalWriterHttpServletResponse(response, |
| printWriter)); |
| } catch (ServletException ex) { |
| throw ServletUtil.wrapServletException(ex, "ServletException including path '" |
| + path + "'."); |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public PrintWriter getPrintWriter() { |
| if (writer == null) { |
| throw new IllegalStateException( |
| "A writer-less Tiles request has been created, cannot return a PrintWriter"); |
| } |
| if (writer instanceof PrintWriter) { |
| return (PrintWriter) writer; |
| } |
| return new PrintWriter(writer); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Writer getWriter() { |
| if (writer == null) { |
| throw new IllegalStateException( |
| "A writer-less Tiles request has been created, cannot return a PrintWriter"); |
| } |
| return writer; |
| } |
| |
| /** |
| * Returns the page scope. |
| * |
| * @return The page scope. |
| */ |
| public Map<String, Object> getPageScope() { |
| if (pageScope == null) { |
| pageScope = new VelocityScopeMap(ctx); |
| } |
| return pageScope; |
| } |
| } |