/*
 * <copyright>
 *  Copyright (c) 2006 by Know-Center, Graz, Austria
 * </copyright>
 *
 *  This software is the confidential and proprietary information of Know-Center,
 *  Graz, Austria. You shall not disclose such Confidential Information and shall 
 *  use it only in accordance with the terms of the license agreement you entered 
 *  into with Know-Center.
 *
 *  KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 *  SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 *  IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, 
 *  OR NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES
 *  SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
 *  THIS SOFTWARE OR ITS DERIVATIVES.
 * 
 * $Id: FileHelper.java,v 1.2 2006/05/15 12:05:21 wlackner Exp $
 */
package at.knowcenter.wag.egov.egiz.tools;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.FileReader;
import java.io.FileWriter;

import org.apache.log4j.Logger;

import at.knowcenter.wag.egov.egiz.cfg.ConfigLogger;

/**
 * This class provides file reader and writer methods. All methods are static!
 * 
 * @author wlackner
 */
public class FileHelper {
  /**
   * The logger definition.
   */
  private static final Logger logger_ = ConfigLogger.getLogger(FileHelper.class);

  /**
   * This method reads a file by reading line by line.
   * 
   * @param fileName the file to be read
   * @return the content string of the file
   */
  public static String readFromFile(String fileName) {
    String file_string = null;
    try {
      BufferedReader reader = new BufferedReader(new FileReader(fileName));
      String line = null;
      file_string = "";
      while ((line = reader.readLine()) != null) {
        file_string += line;
      }
      reader.close();
    } catch (FileNotFoundException e) {
      logger_.info("File not found:" + fileName);
    } catch (IOException e) {
      logger_.info("File can not read:" + fileName);
    }
    return file_string;
  }

  /**
   * This method writes a file line by line.
   * 
   * @param fileName the file to be written
   * @param fileString the content to be written
   * @return true if the file could be written sucessfully, false otherwise
   */
  public static boolean writeToFile(String fileName, String fileString) {
    BufferedWriter writer;
    try {
      FileWriter fwriter = new FileWriter(fileName);
      writer = new BufferedWriter(fwriter);
      writer.write(fileString);
      writer.close();
    } catch (IOException e) {
      logger_.info("File:" + fileName + " can not be written. Cause:" + e.getMessage());
      return false;
    }
    return true;
  }
}