/*
 * @(#)BadFileCopier.java (MetaWerx servlet examples)
 *
 * Copyright (c) 2003 metawerx. All Rights Reserved.
 *
 * This software is the confidential and proprietary information of Metawerx
 * ("Confidential Information").  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 Metawerx.
 * 
 * METAWERX MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY
 * OF THE SOFTWARE OR THE SOURCE CODE, EITHER EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR
 * A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. METAWERX SHALL NOT BE LIABLE
 * FOR ANY DAMAGES SUFFERED BY ANY PARTY AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE AND DOCUMENTATION OR ITS DERIVATIVES
 *
 * Usage:
 * 	java BadFileCopier <source-path> <destination-path>
 *
 */

import java.io.*;

public class BadFileCopier {

	public static void main(String s[]) throws FileNotFoundException, IOException {
	
		System.out.println("Source file: "+s[0]);

		if(s.length != 2) {
			System.out.println("java BadFileCopier <source> <dest-path-or-filename>");
		} else {
		
			if(s[1].endsWith("/") || s[1].endsWith("\\"))
				s[1] = s[1].substring(0, s[1].length()-1);

			String filename = new File(s[0]).getName();
			String destFileName = s[1];
			if(new File(s[1]).isDirectory()) {
				System.out.println("Dest file is directory");
				System.out.println("Using source filename: "+filename);
				destFileName = destFileName + "\\" + filename;
				System.out.println("New dest file: "+destFileName);
			} else
				System.out.println("Dest file: "+destFileName);

			RandomAccessFile source = new RandomAccessFile(s[0], "r");
			RandomAccessFile dest = new RandomAccessFile(destFileName, "rw");

			File sfile = new File(s[0]);
			long len = sfile.length();
			
			int buflen = 65536;
			byte[] buffer = new byte[buflen];
			int readLen = 0;
			int offset = 0;
			int errors = 0;
						
			while(offset < len) {
				boolean ok = false;
				try {
					System.out.print(offset+"-"+(offset+buflen));
					source.seek(offset);
			    	readLen = source.read(buffer, 0, buflen);
			    	if(readLen != -1) {
						dest.seek(offset);
				    	dest.write(buffer, 0, readLen);
				    	offset = offset + readLen;
						ok = true;
						System.out.println(" OK "+readLen);
					}
				} catch(Exception e) {
					System.out.println(" - ERROR "+e.getMessage()+" - SKIPPED - WRITING 0's");
					errors++;
				}
				if(ok == false) {
					for(int i = 0; i < buflen; i++)
						buffer[i] = 0;
					dest.seek(offset);
			    	dest.write(buffer, 0, buflen);
			    	offset = offset + buflen;
				}
			}
			System.out.println("COPY COMPLETED, TOTAL BAD BLOCKS SKIPPED: "+errors);
		}
	}

}