| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| VelocityXslLayout |
|
| 1.6666666666666667;1,667 |
| 1 | package org.apache.turbine.modules.layouts; | |
| 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 java.io.StringReader; | |
| 25 | ||
| 26 | import org.apache.commons.logging.Log; | |
| 27 | import org.apache.commons.logging.LogFactory; | |
| 28 | import org.apache.ecs.ConcreteElement; | |
| 29 | import org.apache.fulcrum.xslt.XSLTServiceFacade; | |
| 30 | import org.apache.turbine.TurbineConstants; | |
| 31 | import org.apache.turbine.modules.Layout; | |
| 32 | import org.apache.turbine.modules.Screen; | |
| 33 | import org.apache.turbine.modules.ScreenLoader; | |
| 34 | import org.apache.turbine.pipeline.PipelineData; | |
| 35 | import org.apache.turbine.services.assemblerbroker.TurbineAssemblerBroker; | |
| 36 | import org.apache.turbine.services.velocity.TurbineVelocity; | |
| 37 | import org.apache.turbine.util.RunData; | |
| 38 | import org.apache.turbine.util.template.TemplateNavigation; | |
| 39 | import org.apache.velocity.context.Context; | |
| 40 | ||
| 41 | /** | |
| 42 | * This Layout module allows Velocity XML templates to be used as layouts. | |
| 43 | * <br><br> | |
| 44 | * Once the (XML) screen and navigation templates have been inserted into | |
| 45 | * the layout template the result is transformed with a XSL stylesheet. | |
| 46 | * The stylesheet (with the same name than the screen template) is loaded | |
| 47 | * and executed by the XSLT service, so it is important that you correctly | |
| 48 | * set up your XSLT service. If the named stylsheet does not exist the | |
| 49 | * default.xsl stylesheet is executed. If default.xsl does not exist | |
| 50 | * the XML is merely echoed. | |
| 51 | * <br><br> | |
| 52 | * Since dynamic content is supposed to be primarily located in | |
| 53 | * screens and navigations there should be relatively few reasons to | |
| 54 | * subclass this Layout. | |
| 55 | * | |
| 56 | * @author <a href="mailto:leon@opticode.co.za">Leon Messerschmidt</a> | |
| 57 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> | |
| 58 | * @version $Id: VelocityXslLayout.java 1066558 2011-02-02 18:12:40Z ludwig $ | |
| 59 | */ | |
| 60 | public class VelocityXslLayout extends Layout | |
| 61 | { | |
| 62 | /** Logging */ | |
| 63 | 0 | private static Log log = LogFactory.getLog(VelocityXslLayout.class); |
| 64 | ||
| 65 | /** The prefix for lookup up layout pages */ | |
| 66 | 0 | private String prefix = Layout.PREFIX + "/"; |
| 67 | ||
| 68 | private ScreenLoader screenLoader; | |
| 69 | ||
| 70 | /** | |
| 71 | * Default constructor | |
| 72 | */ | |
| 73 | public VelocityXslLayout() | |
| 74 | { | |
| 75 | 0 | super(); |
| 76 | ||
| 77 | 0 | this.screenLoader = (ScreenLoader)TurbineAssemblerBroker.getLoader(Screen.NAME); |
| 78 | 0 | } |
| 79 | ||
| 80 | /** | |
| 81 | * Build the layout. Also sets the ContentType and Locale headers | |
| 82 | * of the HttpServletResponse object. | |
| 83 | * @deprecated Use PipelineData version instead. | |
| 84 | * @param data Turbine information. | |
| 85 | * @exception Exception a generic exception. | |
| 86 | */ | |
| 87 | @Deprecated | |
| 88 | @Override | |
| 89 | public void doBuild(RunData data) | |
| 90 | throws Exception | |
| 91 | { | |
| 92 | // Get the context needed by Velocity. | |
| 93 | 0 | Context context = TurbineVelocity.getContext(data); |
| 94 | ||
| 95 | 0 | data.getResponse().setContentType("text/html"); |
| 96 | ||
| 97 | 0 | String screenName = data.getScreen(); |
| 98 | ||
| 99 | 0 | log.debug("Loading Screen " + screenName); |
| 100 | ||
| 101 | // First, generate the screen and put it in the context so | |
| 102 | // we can grab it the layout template. | |
| 103 | 0 | ConcreteElement results = |
| 104 | screenLoader.eval(data, screenName); | |
| 105 | ||
| 106 | 0 | String returnValue = (results == null) ? "" : results.toString(); |
| 107 | ||
| 108 | // variable for the screen in the layout template | |
| 109 | 0 | context.put(TurbineConstants.SCREEN_PLACEHOLDER, returnValue); |
| 110 | ||
| 111 | // variable to reference the navigation screen in the layout template | |
| 112 | 0 | context.put(TurbineConstants.NAVIGATION_PLACEHOLDER, |
| 113 | new TemplateNavigation(data)); | |
| 114 | ||
| 115 | // Grab the layout template set in the VelocityPage. | |
| 116 | // If null, then use the default layout template | |
| 117 | // (done by the TemplateInfo object) | |
| 118 | 0 | String templateName = data.getTemplateInfo().getLayoutTemplate(); |
| 119 | ||
| 120 | 0 | log.debug("Now trying to render layout " + templateName); |
| 121 | ||
| 122 | // Now, generate the layout template. | |
| 123 | 0 | String temp = TurbineVelocity.handleRequest(context, |
| 124 | prefix + templateName); | |
| 125 | ||
| 126 | // Finally we do a transformation and send the result | |
| 127 | // back to the browser | |
| 128 | 0 | XSLTServiceFacade.transform( |
| 129 | data.getTemplateInfo().getScreenTemplate(), | |
| 130 | new StringReader(temp), data.getResponse().getWriter()); | |
| 131 | 0 | } |
| 132 | ||
| 133 | /** | |
| 134 | * Build the layout. Also sets the ContentType and Locale headers | |
| 135 | * of the HttpServletResponse object. | |
| 136 | * | |
| 137 | * @param data Turbine information. | |
| 138 | * @exception Exception a generic exception. | |
| 139 | */ | |
| 140 | @Override | |
| 141 | public void doBuild(PipelineData pipelineData) | |
| 142 | throws Exception | |
| 143 | { | |
| 144 | 0 | RunData data = getRunData(pipelineData); |
| 145 | // Get the context needed by Velocity. | |
| 146 | 0 | Context context = TurbineVelocity.getContext(pipelineData); |
| 147 | ||
| 148 | 0 | data.getResponse().setContentType("text/html"); |
| 149 | ||
| 150 | 0 | String screenName = data.getScreen(); |
| 151 | ||
| 152 | 0 | log.debug("Loading Screen " + screenName); |
| 153 | ||
| 154 | // First, generate the screen and put it in the context so | |
| 155 | // we can grab it the layout template. | |
| 156 | 0 | ConcreteElement results = |
| 157 | screenLoader.eval(pipelineData, screenName); | |
| 158 | ||
| 159 | 0 | String returnValue = (results == null) ? "" : results.toString(); |
| 160 | ||
| 161 | // variable for the screen in the layout template | |
| 162 | 0 | context.put(TurbineConstants.SCREEN_PLACEHOLDER, returnValue); |
| 163 | ||
| 164 | // variable to reference the navigation screen in the layout template | |
| 165 | 0 | context.put(TurbineConstants.NAVIGATION_PLACEHOLDER, |
| 166 | new TemplateNavigation(data)); | |
| 167 | ||
| 168 | // Grab the layout template set in the VelocityPage. | |
| 169 | // If null, then use the default layout template | |
| 170 | // (done by the TemplateInfo object) | |
| 171 | 0 | String templateName = data.getTemplateInfo().getLayoutTemplate(); |
| 172 | ||
| 173 | 0 | log.debug("Now trying to render layout " + templateName); |
| 174 | ||
| 175 | // Now, generate the layout template. | |
| 176 | 0 | String temp = TurbineVelocity.handleRequest(context, |
| 177 | prefix + templateName); | |
| 178 | ||
| 179 | // Finally we do a transformation and send the result | |
| 180 | // back to the browser | |
| 181 | 0 | XSLTServiceFacade.transform( |
| 182 | data.getTemplateInfo().getScreenTemplate(), | |
| 183 | new StringReader(temp), data.getResponse().getWriter()); | |
| 184 | 0 | } |
| 185 | } |