secondo/Algebras/Hadoop/Java/PSEditor/IPAddressFormatter.java

package PSEditor;

import java.text.ParseException;
import java.util.StringTokenizer;

import javax.swing.text.DefaultFormatter;

class IPAddressFormatter extends DefaultFormatter {
  public String valueToString(Object value) throws ParseException {
      if (!(value instanceof byte[]))
          throw new ParseException("Not a byte[]", 0);
      byte[] a = (byte[]) value;
      if (a.length != 4)
          throw new ParseException("Length != 4", 0);
      StringBuilder builder = new StringBuilder();
      for (int i = 0; i < 4; i++) {
          int b = a[i];
          if (b < 0)
              b += 256;
          builder.append(String.valueOf(b));
          if (i < 3)
              builder.append('.');
      }
      return builder.toString();
  }

  public Object stringToValue(String text) throws ParseException {
      StringTokenizer tokenizer = new StringTokenizer(text, ".");
      byte[] a = new byte[4];
      for (int i = 0; i < 4; i++) {
          int b = 0;
          if (!tokenizer.hasMoreTokens())
              throw new ParseException("Too few bytes", 0);
          try {
              b = Integer.parseInt(tokenizer.nextToken());
          } catch (NumberFormatException e) {
              throw new ParseException("Not an integer", 0);
          }
          if (b < 0 || b >= 256)
              throw new ParseException("Byte out of range", 0);
          a[i] = (byte) b;
      }
      if (tokenizer.hasMoreTokens())
          throw new ParseException("Too many bytes", 0);
      return a;
  }
  
  static public boolean isValidIP(String value)
  {
		//Validate the IP address input
    StringTokenizer tokenizer = new StringTokenizer(value, ".");
    byte[] a = new byte[4];
    boolean ok = true;
    for (int i = 0; i < 4; i++) {
        int b = 0;
        if (!tokenizer.hasMoreTokens()){
            //"Too few bytes"
        	ok = false;
        	break;
        }
        
        try {
            b = Integer.parseInt(tokenizer.nextToken());
        } catch (NumberFormatException nfe) {
            //"Not an integer"
        	ok = false;
        	break;
        }
        
        if (b < 0 || b >= 256){
         //"Byte out of range"
        	ok = false;
        	break;
        }
        a[i] = (byte) b;
    }
    
    if (tokenizer.hasMoreTokens()){
        //"Too many bytes"
    	ok = false;
    }
    
    return ok;
  }

  static public Object toBytesValue(String value)
  {
  	//Validate the IP address input
  	StringTokenizer tokenizer = new StringTokenizer(value, ".");
  	byte[] a = new byte[4];
  	boolean ok = true;
  	for (int i = 0; i < 4; i++) {
  		int b = 0;
  		if (!tokenizer.hasMoreTokens()){
  			//"Too few bytes"
  			ok = false;
  			break;
  		}
  		
  		try {
  			String sv = tokenizer.nextToken();
//  			b = Integer.parseInt(tokenizer.nextToken());
  			b = Integer.parseInt(sv);
  			System.out.println("tokenzier " + i + " is " + sv + ", while the byte is: " + b);
  		} catch (NumberFormatException nfe) {
  			//"Not an integer"
  			ok = false;
  			break;
  		}
  		
  		if (b < 0 || b >= 256){
  			//"Byte out of range"
  			ok = false;
  			break;
  		}
  		a[i] = (byte) b;
  	}
  	
  	if (tokenizer.hasMoreTokens()){
  		//"Too many bytes"
  		ok = false;
  	}
  	
  	if (!ok)
  		return new byte[0];
  	else
  		return a;
  }
  
  
}