import java.text.ParseException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import javax.swing.text.DefaultFormatter;

/**
*
* @author homisinho
*/
public class RegexFormatter extends DefaultFormatter {
private Pattern pattern;
private Matcher matcher;

public RegexFormatter() {
super();
}

public RegexFormatter(String pattern) throws PatternSyntaxException {
this();
setPattern(Pattern.compile(pattern));
}

public RegexFormatter(Pattern pattern) {
this();
setPattern(pattern);
}

public void setPattern(Pattern pattern) {
this.pattern = pattern;
}

public Pattern getPattern() {
return pattern;
}

protected void setMatcher(Matcher matcher) {
this.matcher = matcher;
}

protected Matcher getMatcher() {
return matcher;
}

@Override
public Object stringToValue(String text) throws ParseException {
Pattern pattern = getPattern();

if (pattern != null) {
Matcher matcher = pattern.matcher(text);

if (matcher.matches()) {
setMatcher(matcher);
return super.stringToValue(text);
}
throw new ParseException("Pattern did not match", 0);
}
return text;
}

}