1 package org.apache.turbine.services.jsp.util; 2 3 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one 6 * or more contributor license agreements. See the NOTICE file 7 * distributed with this work for additional information 8 * regarding copyright ownership. The ASF licenses this file 9 * to you under the Apache License, Version 2.0 (the 10 * "License"); you may not use this file except in compliance 11 * with the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, 16 * software distributed under the License is distributed on an 17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 18 * KIND, either express or implied. See the License for the 19 * specific language governing permissions and limitations 20 * under the License. 21 */ 22 23 24 import org.apache.commons.logging.Log; 25 import org.apache.commons.logging.LogFactory; 26 import org.apache.turbine.modules.NavigationLoader; 27 import org.apache.turbine.services.TurbineServices; 28 import org.apache.turbine.services.template.TemplateService; 29 import org.apache.turbine.util.RunData; 30 31 /** 32 * Returns output of a Navigation module. An instance of this is placed in the 33 * request by the JspLayout. This allows template authors to 34 * set the navigation template they'd like to place in their templates.<br> 35 * Here's how it's used in a JSP template:<br> 36 * <code> 37 * <%useBean id="navigation" class="JspNavigation" scope="request" %> 38 * ... 39 * <%= navigation.setTemplate("admin_navigation.jsp") %> 40 * </code> 41 * @author <a href="john.mcnally@clearink.com">John D. McNally</a> 42 * @author <a href="mbryson@mont.mindspring.com">Dave Bryson</a> 43 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> 44 * @version $Id: JspNavigation.java 1773378 2016-12-09 13:19:59Z tv $ 45 */ 46 public class JspNavigation 47 { 48 /** Logging */ 49 private static Log log = LogFactory.getLog(JspNavigation.class); 50 51 /* The RunData object */ 52 private final RunData data; 53 54 /** 55 * Constructor 56 * 57 * @param data Turbine request data 58 */ 59 public JspNavigation(RunData data) 60 { 61 this.data = data; 62 } 63 64 /** 65 * builds the output of the navigation template 66 * @param template the name of the navigation template 67 */ 68 public void setTemplate(String template) 69 { 70 data.getTemplateInfo().setNavigationTemplate(template); 71 String module = null; 72 try 73 { 74 TemplateService templateService = (TemplateService)TurbineServices.getInstance().getService(TemplateService.SERVICE_NAME); 75 module = templateService.getNavigationName(template); 76 NavigationLoader.getInstance().exec(data, module); 77 } 78 catch (Exception e) 79 { 80 String message = "Error processing navigation template:" + 81 template + " using module: " + module; 82 log.error(message, e); 83 try 84 { 85 data.getResponse().getWriter().print("Error processing navigation template: " 86 + template + " using module: " + module); 87 } 88 catch (java.io.IOException ioe) 89 { 90 // ignore 91 } 92 } 93 } 94 }