frange ';' VERSION ( ';' BOOLEAN )?

/**
 * Return 
 * 
 * <pre>
 * ${frange;1.2.3}             -> (&(version>=1.2.3)(!(version>=1.3.0))
 * ${frange;1.2.3, true}       -> (&(version>=1.2.3)(!(version>=2.0.0))
 * </pre>
 */
public String _frange(String[] args) {
	if (args.length < 2 || args.length > 3) {
		error("Invalid filter range, 2 or 3 args ${frange;<version>[;true|false]}");
		return null;
	}

	String v = args[1];
	if (!Verifier.isVersion(v)) {
		error("Invalid version arg %s", v);
		return null;
	}

	boolean isProvider = false;
	if (args.length == 3)
		isProvider = Processor.isTrue(args[2]);

	Version low = new Version(v);
	Version high;
	if (isProvider)
		high = new Version(low.getMajor(), low.getMinor() + 1, 0);
	else
		high = new Version(low.getMajor() + 1, 0, 0);

	StringBuilder sb = new StringBuilder("(&(version>=").append(low.getWithoutQualifier()).append(")");
	sb.append("(!(version>=").append(high.getWithoutQualifier()).append(")))");

	return sb.toString();
}