FileConfiguration.java from DrJava at Krugle

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/*BEGIN_COPYRIGHT_BLOCK
 *
 * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
 * All rights reserved.
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package edu.rice.cs.drjava.config;
import java.io.*;
import edu.rice.cs.util.FileOps;

/** A Configuration object that is backed by a file.
 *  @version $Id: FileConfiguration.java 4255 2007-08-28 19:17:37Z mgricken $
 */
public class FileConfiguration extends SavableConfiguration {  
  
  public final File file;
  
  /** Creates a new Configuration object using the values stored in file f.  Any values not specified by f will be 
   *  set to defaults from OptionConstants.
   *  @param f Properties file containing customized values
   */
  public FileConfiguration(File f) {
    super(new DefaultOptionMap());
    file = f.getAbsoluteFile();
  }
  
  /** Calls SavableConfiguration.loadConfiguration, which loads all values from the file, based on the defaults in
   *  OptionConstants.
   */
  public void loadConfiguration() throws IOException {
    loadConfiguration(new BufferedInputStream(new FileInputStream(file)));
  }
  
  /** Saves the current settings to the stored properties file. */
  public void saveConfiguration() throws IOException {
    saveConfiguration("DrJava configuration file");
  }
  
  /** Saves the current settings to the stored properties file.
   *  @param header Description of the properties list
   */
  public void saveConfiguration(final String header) throws IOException {
    FileOps.saveFile(new FileOps.DefaultFileSaver(file) {
      public void saveTo(OutputStream os) throws IOException {
        saveConfiguration(os,header);
      }
      public boolean shouldBackup() {
        return false;
      }
    });
  }
}
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