/*

  * Copyright (c) 2004 International Decision Systems, Inc.  All Rights Reserved.

  *

  * By using this Software, You acknowledge that the Software is a valuable asset

  * and trade secret of either International Decision Systems, Inc. ("IDSI") or a

  * third party supplier of IDSI and constitutes confidential and proprietary

  * information.

  *

  * NEITHER IDSI NOR ANY AGENT OR PERSON ACTING FOR OR WITH IDSI HAS MADE OR DOES

  * MAKE ANY STATEMENTS, AFFIRMATIONS, REPRESENTATIONS OR WARRANTIES WHATSOEVER

  * TO YOU, WHETHER EXPRESS OR IMPLIED, AS TO THE SOFTWARE, THE QUALITY OR

  * CONDITION OF THE SOFTWARE, OR THE OPERATING CHARACTERISTICS OR RELIABILITY OF

  * THE SOFTWARE, OR ITS SUITABILITY FOR ANY GENERAL OR PARTICULAR PURPOSE, OR AS

  * TO ANY OTHER MATTER WHATSOEVER; ANY AND ALL OTHER WARRANTIES INCLUDING

  * WITHOUT LIMITATION ANY WARRANTIES IMPLIED BY LAW, SUCH AS THE IMPLIED

  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND TITLE,

  * USE AND NON-INFRINGEMENT; ARE HEREBY EXPRESSLY DISCLAIMED AND EXCLUDED.

 */

 package net.sourceforge.addam.ddlrun.utils;

 import java.io.*;

 import java.util.MissingResourceException;

 /**

  * Used to read resources from within the local FileSystem.

  *

  * @author TIM3

  * @since Mar 5, 2005

  */

 public class FileSystemReader implements ResourceReader {

     /**

      * Allows only the FileSystemReaderFactory to construct a FileSystemReader.

      *

      * @param resourceFile the file to read from

      */

     FileSystemReader(File resourceFile) {

         this.resourceFile = resourceFile;

     }

     public String readLine() throws IOException {

         return this.getReader().readLine();

     }

     private BufferedReader getReader() {

         if (reader == null) {

             try {

                 reader = new BufferedReader(new FileReader(resourceFile));

             } catch (FileNotFoundException e) {

                 throw new MissingResourceException("FileSystemReader unable to locate resource " + resourceFile,

                         FileSystemReader.class.getName(), resourceFile.toString());

             }

         }

         return reader;

     }

     private BufferedReader reader;

     final File resourceFile; // not private in order to facilitate testing

 }