Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 Copyright 2012-2013, Polyvi Inc. (http://polyvi.github.io/openxface)
 This program is distributed under the terms of the GNU General Public License.
    
 This file is part of xFace.
    
 xFace is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation, either version 3 of the License, or
 (at your option) any later version.
    
 xFace is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.
    
 You should have received a copy of the GNU General Public License
 along with xFace.  If not, see <http://www.gnu.org/licenses/>.
 */

import java.io.ByteArrayInputStream;

import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import java.io.RandomAccessFile;
import java.nio.channels.FileChannel;

public class Main {

    public static long write(String fileName, String data, int position) throws FileNotFoundException, IOException {
        boolean append = false;
        if (position > 0) {
            truncateFile(fileName, position);
            append = true;
        }

        byte[] rawData = data.getBytes();
        ByteArrayInputStream in = new ByteArrayInputStream(rawData);
        FileOutputStream out = new FileOutputStream(fileName, append);
        byte buff[] = new byte[rawData.length];
        in.read(buff, 0, buff.length);
        out.write(buff, 0, rawData.length);
        out.flush();
        out.close();

        return data.length();
    }

    public static long truncateFile(String fileName, long size) throws FileNotFoundException, IOException {
        RandomAccessFile raf = new RandomAccessFile(fileName, "rw");

        if (raf.length() >= size) {
            FileChannel channel = raf.getChannel();
            channel.truncate(size);
            return size;
        }

        return raf.length();
    }
}