/*

  * Copyright 2001,2004 The Apache Software Foundation.

  * 

  * Licensed 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.

  */

 package org.apache.commons.scaffold.util;

 import java.util.Properties;

 import javax.servlet.UnavailableException;

 /**

  * Property and Resource utilities.

  *

  * @author Ted Husted

  * @version $Revision: 155464 $ $Date: 2005-02-26 13:26:54 +0000 (Sat, 26 Feb 2005) $

  */

 public class ResourceUtils {

     /**

      * Message to log if resource is not found.

      */

     private static final String RESOURCE_NOT_FOUND =

         "Resources not found";

     /**

      * Load a properties file.

      * The path must include the package name(s),

      * if any, in system directory format and

      * include the properties extension.

      *

      * @param caller The object making the call. Needed to access ClassLoader.

      * @param path The path to the properties file

      * @return The initialized Properties object

      * @throws UnavailableException if resource cannot be found

      */

     public static final Properties loadProperties(Object caller,

             String path) throws Exception {

         // name = name.replace('.', '/');

         // if doesn't end in .properties

         // name += ".properties";

         java.io.InputStream is = caller.getClass().getClassLoader().getResourceAsStream(path);

         if (null==is)

            throw new UnavailableException(RESOURCE_NOT_FOUND);

         java.io.BufferedInputStream bis = new java.io.BufferedInputStream(is);

         Properties p = null;

         if (bis != null) {

             try {

                 p = new Properties();

                 p.load(bis);

                 bis.close();

                 is.close();

             }

             catch (java.io.IOException e) {

                 p = null;

             }

             finally {

                 is = null;

                 bis = null;

             }

         }

         return p;

     }

     public static final Properties loadProperties (String path) throws Exception {

         return loadProperties (new Object(),path);

     }

     /**

      * Load a properties file.

      * This is a simplified version of <code>loadProperties(Object, String)</code>.

      *

      * @param caller The object making the call. Needed to access ClassLoader.

      * @param path The path to the properties file

      * @return The initialized Properties object

      */

     public static final Properties loadPropertiesFile(String path) {

         Properties p = null;

         try {

             java.io.FileInputStream i = new java.io.FileInputStream(path);

             p = new java.util.Properties();

             p.load(i);

         }

         catch (Exception e) {

             p = null;

         }

         return p;

     }

 }