/*

  * This software is licensed under the Apache License, Version 2.0

  * (the "License") agreement; 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.

  */

 package net.admin4j.util;

 import java.io.File;

 import java.io.IOException;

 import java.util.Map;

 import net.admin4j.config.Admin4JConfiguration;

 import net.admin4j.deps.commons.lang3.SystemUtils;

 import net.admin4j.deps.commons.lang3.Validate;

 import freemarker.ext.beans.BeansWrapper;

 import freemarker.template.Configuration;

 import freemarker.template.DefaultObjectWrapper;

 import freemarker.template.Template;

 import freemarker.template.TemplateModelException;

 import freemarker.template.TemplateScalarModel;

 /**

  * Generic Freemarker utilities

  * @author D. Ashmore

  *

  */

 public class FreemarkerUtils {

     @SuppressWarnings("rawtypes")

     public static Template createConfiguredTemplate(Class templateLoadingClass, String templateName)

             throws IOException {

         Validate.notNull(templateLoadingClass, "Null templateLoadingClass not allowed.");

         Validate.notEmpty(templateName, "Null or blank templateName not allowed.");

         Configuration cfg = new Configuration();

         if (Admin4JConfiguration.getBaseFreemarkerTemplateDirectory() == null) {

             cfg.setClassForTemplateLoading(templateLoadingClass, "");

         }

         else {

             StringBuffer dirName = new StringBuffer(Admin4JConfiguration.getBaseFreemarkerTemplateDirectory().getAbsolutePath());

             if ( !dirName.toString().endsWith(SystemUtils.FILE_SEPARATOR) ) {

                 dirName.append(SystemUtils.FILE_SEPARATOR);

             }

             dirName.append(templateLoadingClass.getPackage().getName().replace('.', SystemUtils.FILE_SEPARATOR.charAt(0)));

             cfg.setDirectoryForTemplateLoading( new File(dirName.toString()));

         }

         DefaultObjectWrapper  myObjWrapper = new  DefaultObjectWrapper();

         myObjWrapper.setNullModel(TemplateScalarModel.EMPTY_STRING);

         cfg.setObjectWrapper(myObjWrapper);

         Template temp = cfg.getTemplate(templateName);

         return temp;

     }

     public static void addConfiguration(Map<String, Object> variableMap) {

         try {

             variableMap.put("configuration", BeansWrapper.getDefaultInstance().getStaticModels().get("net.admin4j.config.Admin4JConfiguration"));

         } catch (TemplateModelException e) {

             throw new Admin4jRuntimeException(e);

         }

     }

 }