package org.apache.turbine.services.template.mapper;

 /*

  * Licensed to the Apache Software Foundation (ASF) under one

  * or more contributor license agreements.  See the NOTICE file

  * distributed with this work for additional information

  * regarding copyright ownership.  The ASF licenses this file

  * to you under the Apache License, Version 2.0 (the

  * "License"); you may not use this file except in compliance

  * with the License.  You may obtain a copy of the License at

  *

  *   http://www.apache.org/licenses/LICENSE-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an

  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY

  * KIND, either express or implied.  See the License for the

  * specific language governing permissions and limitations

  * under the License.

  */

 import org.apache.commons.lang.StringUtils;

 import org.apache.turbine.services.TurbineServices;

 import org.apache.turbine.services.template.TemplateEngineService;

 import org.apache.turbine.services.template.TemplateService;

 /**

  * This is a pretty simple mapper which returns template pathes for

  * a supplied template name. This path can be used by the TemplateEngine

  * to access a certain resource to actually render the template.

  *

  * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a>

  * @version $Id: ScreenTemplateMapper.java 1723699 2016-01-08 11:29:21Z tv $

  */

 public class ScreenTemplateMapper

     extends BaseTemplateMapper

     implements Mapper

 {

     /**

      * Default C'tor. If you use this C'tor, you must use

      * the bean setter to set the various properties needed for

      * this mapper before first usage.

      */

     public ScreenTemplateMapper()

     {

         super();

     }

     /**

      * Check, whether the provided name exists. Returns null

      * if the screen does not exist.

      *

      * @param template The template name.

      * @return The matching screen name.

      */

     @Override

     public String doMapping(String template)

     {

         String [] components = StringUtils.split(template, String.valueOf(TemplateService.TEMPLATE_PARTS_SEPARATOR));

         // Last element decides, which template Service to use...

         TemplateService templateService = (TemplateService)TurbineServices.getInstance().getService(TemplateService.SERVICE_NAME);

         TemplateEngineService tes = templateService.getTemplateEngineService(components[components.length - 1]);

         String templatePackage = StringUtils.join(components, String.valueOf(separator));

         // But the Templating service must look for the name with prefix

         StringBuilder testPath = new StringBuilder();

         if (StringUtils.isNotEmpty(prefix))

         {

             testPath.append(prefix);

             testPath.append(separator);

         }

         testPath.append(templatePackage);

         return (tes != null && tes.templateExists(testPath.toString()))

             ? templatePackage

             : null;

     }

 }