Package gps.garmin.img

Source Code of gps.garmin.img.DecryptFileParser

/*
* DecryptFileParser.java
*
* Created on 18 de junio de 2007, 17:34
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/

package gps.garmin.img;

import gps.garmin.img.structure.Header;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;

/**
*
* @author aranzuglia
*/
public class DecryptFileParser extends FileParser {
   
    private File resultFile;

    protected void finalize() throws Throwable {
    }
   
    public DecryptFileParser(File imgFile, File resultFile) throws ParseException {
        super(imgFile);
       
        try {
            this.resultFile = resultFile;
            if (!resultFile.exists()) {
                resultFile.createNewFile();
            }
        } catch (IOException e) {
            e.printStackTrace();
            throw new ParseException(e.getMessage());
        }
    }
   
    public void parse() throws ParseException {
        try {
            parseXorByte(new Header());
           
            if (isXorEd) {
                int xorByte = currentByte;

                BufferedOutputStream out =
                    new BufferedOutputStream(new FileOutputStream(resultFile));
               
                out.write(currentByte);
                for (int i = 0; i < imgFile.length() - 1; i++) {
                    nextByte();
                    out.write(currentByte ^ xorByte);
                }
                out.flush();
                out.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
            throw new ParseException(e.getMessage());
        }
    }

}
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