001package org.apache.turbine.services.template.mapper; 002 003 004/* 005 * Licensed to the Apache Software Foundation (ASF) under one 006 * or more contributor license agreements. See the NOTICE file 007 * distributed with this work for additional information 008 * regarding copyright ownership. The ASF licenses this file 009 * to you under the Apache License, Version 2.0 (the 010 * "License"); you may not use this file except in compliance 011 * with the License. You may obtain a copy of the License at 012 * 013 * http://www.apache.org/licenses/LICENSE-2.0 014 * 015 * Unless required by applicable law or agreed to in writing, 016 * software distributed under the License is distributed on an 017 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 018 * KIND, either express or implied. See the License for the 019 * specific language governing permissions and limitations 020 * under the License. 021 */ 022 023 024import org.apache.commons.lang3.StringUtils; 025import org.apache.turbine.services.TurbineServices; 026import org.apache.turbine.services.template.TemplateEngineService; 027import org.apache.turbine.services.template.TemplateService; 028 029/** 030 * This is a pretty simple mapper which returns template pathes for 031 * a supplied template name. This path can be used by the TemplateEngine 032 * to access a certain resource to actually render the template. 033 * 034 * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> 035 * @version $Id$ 036 */ 037 038public class ScreenTemplateMapper 039 extends BaseTemplateMapper 040 implements Mapper 041{ 042 /** 043 * Default C'tor. If you use this C'tor, you must use 044 * the bean setter to set the various properties needed for 045 * this mapper before first usage. 046 */ 047 public ScreenTemplateMapper() 048 { 049 super(); 050 } 051 052 /** 053 * Check, whether the provided name exists. Returns null 054 * if the screen does not exist. 055 * 056 * @param template The template name. 057 * @return The matching screen name. 058 */ 059 @Override 060 public String doMapping(String template) 061 { 062 String [] components = StringUtils.split(template, String.valueOf(TemplateService.TEMPLATE_PARTS_SEPARATOR)); 063 064 // Last element decides, which template Service to use... 065 TemplateService templateService = (TemplateService)TurbineServices.getInstance().getService(TemplateService.SERVICE_NAME); 066 TemplateEngineService tes = templateService.getTemplateEngineService(components[components.length - 1]); 067 068 String templatePackage = StringUtils.join(components, String.valueOf(separator)); 069 070 // But the Templating service must look for the name with prefix 071 StringBuilder testPath = new StringBuilder(); 072 if (StringUtils.isNotEmpty(prefix)) 073 { 074 testPath.append(prefix); 075 testPath.append(separator); 076 } 077 testPath.append(templatePackage); 078 079 return (tes != null && tes.templateExists(testPath.toString())) 080 ? templatePackage 081 : null; 082 } 083} 084 085 086 087