1 /* 2 * $Id: UrlPreparer.java 1310865 2012-04-07 21:01:22Z nlebas $ 3 * 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 package org.apache.tiles.compat.preparer; 23 24 import java.io.IOException; 25 26 import org.apache.tiles.AttributeContext; 27 import org.apache.tiles.preparer.PreparerException; 28 import org.apache.tiles.preparer.ViewPreparer; 29 import org.apache.tiles.request.Request; 30 import org.apache.tiles.request.DispatchRequest; 31 32 /** 33 * Uses a URL that acts as a preparer. When 34 * {@link org.apache.tiles.preparer.factory.factory.ViewPreparer#execute(Request, AttributeContext)} 35 * is called, the URL is got, but its response is discarded. 36 * 37 * @version $Rev: 1310865 $ $Date: 2012-04-08 07:01:22 +1000 (Sun, 08 Apr 2012) $ 38 * @since 2.1.0 39 */ 40 public class UrlPreparer implements ViewPreparer { 41 42 /** 43 * The URL to be used as a preparer. 44 */ 45 private String url; 46 47 /** 48 * Constructor. 49 * 50 * @param url The URL to be used as a preparer. 51 */ 52 public UrlPreparer(String url) { 53 this.url = url; 54 } 55 56 /** {@inheritDoc} */ 57 @Override 58 public void execute(Request tilesContext, 59 AttributeContext attributeContext) { 60 61 if (tilesContext instanceof DispatchRequest) { 62 try { 63 ((DispatchRequest) tilesContext).include(url); 64 } catch (IOException e) { 65 throw new PreparerException("The inclusion of the URL " + url 66 + " threw an I/O exception", e); 67 } 68 } else { 69 throw new PreparerException("This preparer is restricted to web environments"); 70 } 71 } 72 }