/*
 * DisposeUtf.java 
 *
 * Copyright (C) 2003 Miika Nurminen
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.InputStream;
import java.io.PrintStream;
import java.io.IOException;

/**
 * Corrects XML declaration from UTF-8 to ISO-8859-1.
 * File (or its actual encoding) is left untouched.
 * Operates on standard input / output.
 * 
 * Alternate way: use GNU IMAP utility to convert file's actual encoding to
 * UTF-8 (as stated in the declaration): 
 *   iconv -f ISO-8859-1 -t UTF-8
 *
 * @author  Miika Nurminen
 * @version  0.1 - 2003-09-04
 */
public class DisposeUtf {
  
  /** Creates a new instance of StdinTest */
  public DisposeUtf() {
  }
  
  public void performTrasform(InputStream in, PrintStream out) throws java.io.IOException {
    BufferedReader b = new BufferedReader(new InputStreamReader(in));
    String s = b.readLine();
    String t="<?xml version=\"1.0\" encoding=\"ISO-8859-1\"?>";
    if (s==null) throw new java.io.IOException("No input!");
    if ((s.equalsIgnoreCase("<?xml version=\"1.0\" encoding=\"UTF-8\"?>")) ||
        (s.equalsIgnoreCase(t))) {
      s=t;
    }
    else throw new java.io.IOException("Cannot parse input! try java DisposeUtf -h for help.");
    while(s!=null) {
      out.println(s); 
      s=b.readLine();
    }
  }
  
  /**
   * @param args the command line arguments
   */
  public static void main(String[] args) {
    FileArgumentScheme m = new FileArgumentScheme(args);
    try {
      if (m.helpWanted()) {
        System.out.println("\nCorrects XML declaration from UTF-8 to ISO-8859-1.");
        System.out.println("File (or its actual encoding) is left untouched.");
        System.out.println("Operates on standard input / output or given filenames.\n");
        System.out.println("Usage examples:");
        System.out.println("  cat input.xml | java DisposeUtf > output.xml");
        System.out.println("  java DisposeUtf -i input.xml -o output.xml\n");
        return;
      }
      m.openStreams();
      DisposeUtf u = new DisposeUtf();
      u.performTrasform(m.getInput(),m.getOutput());
    }
    catch (IOException e) {
      ErrorLib.errorReport(e);
    }
    try {
      m.getInput().close();
      m.getOutput().close();
    }
    catch (IOException e) {
      ErrorLib.errorReport(e);
    }
    
  }
}