Coverage report

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org.apache.turbine.modules.layouts.VelocityXslLayout
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 package org.apache.turbine.modules.layouts;
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 3  
 /*
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  * Copyright 2001-2005 The Apache Software Foundation.
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  *
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  * Licensed under the Apache License, Version 2.0 (the "License")
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  * you may not use this file except in compliance with the License.
 8  
  * You may obtain a copy of the License at
 9  
  *
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  *     http://www.apache.org/licenses/LICENSE-2.0
 11  
  *
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  * Unless required by applicable law or agreed to in writing, software
 13  
  * distributed under the License is distributed on an "AS IS" BASIS,
 14  
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 15  
  * See the License for the specific language governing permissions and
 16  
  * limitations under the License.
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  */
 18  
 
 19  
 import java.io.StringReader;
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 21  
 import org.apache.commons.logging.Log;
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 import org.apache.commons.logging.LogFactory;
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 24  
 import org.apache.ecs.ConcreteElement;
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 26  
 import org.apache.turbine.TurbineConstants;
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 import org.apache.turbine.modules.Layout;
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 import org.apache.turbine.modules.ScreenLoader;
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 import org.apache.turbine.services.velocity.TurbineVelocity;
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 import org.apache.turbine.services.xslt.TurbineXSLT;
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 import org.apache.turbine.util.RunData;
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 import org.apache.turbine.util.template.TemplateNavigation;
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 import org.apache.velocity.context.Context;
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 36  
 /**
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  * This Layout module allows Velocity XML templates to be used as layouts.
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  * <br><br>
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  * Once the (XML) screen and navigation templates have been inserted into
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  * the layout template the result is transformed with a XSL stylesheet.
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  * The stylesheet (with the same name than the screen template) is loaded
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  * and executed by the XSLT service, so it is important that you correctly
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  * set up your XSLT service.  If the named stylsheet does not exist the
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  * default.xsl stylesheet is executed.  If default.xsl does not exist
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  * the XML is merely echoed.
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  * <br><br>
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  * Since dynamic content is supposed to be primarily located in
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  * screens and navigations there should be relatively few reasons to
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  * subclass this Layout.
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  *
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  * @author <a href="mailto:leon@opticode.co.za">Leon Messerschmidt</a>
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  * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
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  * @version $Id: VelocityXslLayout.java 264148 2005-08-29 14:21:04Z henning $
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  */
 55  0
 public class VelocityXslLayout extends Layout
 56  
 {
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     /** Logging */
 58  0
     private static Log log = LogFactory.getLog(VelocityXslLayout.class);
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 60  
     /** The prefix for lookup up layout pages */
 61  0
     private String prefix = TurbineConstants.LAYOUT_PREFIX + "/";
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 63  
     /**
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      * Build the layout.  Also sets the ContentType and Locale headers
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      * of the HttpServletResponse object.
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      *
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      * @param data Turbine information.
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      * @exception Exception a generic exception.
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      */
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     public void doBuild(RunData data)
 71  
         throws Exception
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     {
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         // Get the context needed by Velocity.
 74  0
         Context context = TurbineVelocity.getContext(data);
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         data.getResponse().setContentType("text/html");
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 78  0
         String screenName = data.getScreen();
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         log.debug("Loading Screen " + screenName);
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 82  
         // First, generate the screen and put it in the context so
 83  
         // we can grab it the layout template.
 84  0
         ConcreteElement results =
 85  
             ScreenLoader.getInstance().eval(data, screenName);
 86  
 
 87  0
         String returnValue = (results == null) ? "" : results.toString();
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 89  
         // variable for the screen in the layout template
 90  0
         context.put(TurbineConstants.SCREEN_PLACEHOLDER, returnValue);
 91  
 
 92  
         // variable to reference the navigation screen in the layout template
 93  0
         context.put(TurbineConstants.NAVIGATION_PLACEHOLDER,
 94  
                     new TemplateNavigation(data));
 95  
 
 96  
         // Grab the layout template set in the VelocityPage.
 97  
         // If null, then use the default layout template
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         // (done by the TemplateInfo object)
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         String templateName = data.getTemplateInfo().getLayoutTemplate();
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 101  0
         log.debug("Now trying to render layout " + templateName);
 102  
 
 103  
         // Now, generate the layout template.
 104  0
         String temp = TurbineVelocity.handleRequest(context,
 105  
                 prefix + templateName);
 106  
 
 107  
         // Finally we do a transformation and send the result
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         // back to the browser
 109  0
         TurbineXSLT.transform(
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             data.getTemplateInfo().getScreenTemplate(),
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                 new StringReader(temp), data.getOut());
 112  0
     }
 113  
 }

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