private void prepareRegExps(){
		regExpsAreValid = true;
		regExps.clear();
		if (DEBUG)
			System.out.println("Trying to match:");
		if(!usesStandardSyntax){
			Iterator<StringBuffer> it = getRows().iterator();
			while (it.hasNext()) {
				String row = it.next().toString();
				regExps.add(Pattern.compile(makeRegExp(row)));
				if(DEBUG)
					System.out.println(row+" becomes "+makeRegExp(row));
			}			
		} else {
			Iterator<StringBuffer> it = getRows().iterator();
			while (it.hasNext()) {
				String row = it.next().toString();
				regExps.add(Pattern.compile(row));
			}
		}
	}