Coverage report

  %line %branch
org.apache.turbine.modules.screens.VelocityDirectScreen
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 1  
 package org.apache.turbine.modules.screens;
 2  
 
 3  
 /*
 4  
  * Copyright 2001-2005 The Apache Software Foundation.
 5  
  *
 6  
  * Licensed under the Apache License, Version 2.0 (the "License")
 7  
  * you may not use this file except in compliance with the License.
 8  
  * You may obtain a copy of the License at
 9  
  *
 10  
  *     http://www.apache.org/licenses/LICENSE-2.0
 11  
  *
 12  
  * 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.
 17  
  */
 18  
 
 19  
 import org.apache.commons.lang.StringUtils;
 20  
 import org.apache.commons.lang.exception.ExceptionUtils;
 21  
 
 22  
 import org.apache.ecs.ConcreteElement;
 23  
 
 24  
 import org.apache.velocity.context.Context;
 25  
 
 26  
 import org.apache.turbine.Turbine;
 27  
 import org.apache.turbine.TurbineConstants;
 28  
 import org.apache.turbine.services.template.TurbineTemplate;
 29  
 import org.apache.turbine.services.velocity.TurbineVelocity;
 30  
 import org.apache.turbine.util.RunData;
 31  
 
 32  
 /**
 33  
  * VelocityDirectScreen is a screen class which returns its output
 34  
  * directly to the output stream. It can be used if buffering an
 35  
  * output screen isn't possible or the result doesn't fit in the
 36  
  * memory.
 37  
  * <p>
 38  
  * @author <a href="mailto:mbryson@mont.mindspring.com">Dave Bryson</a>
 39  
  * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>
 40  
  * @version $Id: VelocityDirectScreen.java 264148 2005-08-29 14:21:04Z henning $
 41  
  */
 42  0
 public class VelocityDirectScreen
 43  
     extends VelocityScreen
 44  
 {
 45  
     /** The prefix for lookup up screen pages */
 46  0
     private String prefix = TurbineConstants.SCREEN_PREFIX + "/";
 47  
 
 48  
     /**
 49  
      * This builds the Velocity template.
 50  
      *
 51  
      * @param data Turbine information.
 52  
      * @return A ConcreteElement.
 53  
      * @exception Exception, a generic exception.
 54  
      */
 55  
     public ConcreteElement buildTemplate(RunData data)
 56  
         throws Exception
 57  
     {
 58  0
         Context context = TurbineVelocity.getContext(data);
 59  
 
 60  0
         String screenTemplate = data.getTemplateInfo().getScreenTemplate();
 61  0
         String templateName
 62  
             = TurbineTemplate.getScreenTemplateName(screenTemplate);
 63  
 
 64  
         // The Template Service could not find the Screen
 65  0
         if (StringUtils.isEmpty(templateName))
 66  
         {
 67  0
             log.error("Screen " + screenTemplate + " not found!");
 68  0
             throw new Exception("Could not find screen for " + screenTemplate);
 69  
         }
 70  
 
 71  
         try
 72  
         {
 73  0
             TurbineVelocity.handleRequest(context,
 74  
                                           prefix + templateName,
 75  
                                           data.getOut());
 76  
 
 77  
         }
 78  0
         catch (Exception e)
 79  
         {
 80  
             // If there is an error, build a $processingException and
 81  
             // attempt to call the error.vm template in the screens
 82  
             // directory.
 83  0
             context.put (TurbineConstants.PROCESSING_EXCEPTION_PLACEHOLDER, e.toString());
 84  0
             context.put (TurbineConstants.STACK_TRACE_PLACEHOLDER, ExceptionUtils.getStackTrace(e));
 85  
 
 86  0
             templateName = Turbine.getConfiguration()
 87  
                 .getString(TurbineConstants.TEMPLATE_ERROR_KEY,
 88  
                            TurbineConstants.TEMPLATE_ERROR_VM);
 89  
 
 90  0
             TurbineVelocity.handleRequest(context,
 91  
                     prefix + templateName,
 92  
                     data.getOut());
 93  0
         }
 94  
 
 95  0
         return null;
 96  
     }
 97  
 }

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