Query Parser class for Lotus Notes/Domino written in Java

QueryParser.java

private class QueryParser {		
	public Hashtable parseQueryString(String qsd) {
		// we will return this
		Hashtable data = new Hashtable();
		
		// check if it contains pairs of k/v
		if(qsd.indexOf("&") > -1) {
			String[] pairs = qsd.split("&");
			
			for(int i = 0; i < pairs.length; i++) {
				// check if it contains k/v
				if(pairs[i].indexOf("=") > -1) {
					String[] kv = pairs[i].split("=");	
					
					if(kv.length == 2) {		
						data.put(kv[0].toLowerCase(), kv[1]);
					} else {
						data.put(kv[0].toLowerCase(), "");
					}
				}
				
				// okay, no k/v, just a value (not empty)
				else if(!pairs[i].equals("")) {
					data.put(pairs[i].toLowerCase(), "");
				}
			}
		}
		
		// okay, no pairs, what about a single k/v?
		else if(qsd.indexOf("=") > -1) {
			String[] kv = qsd.split("=");
			
			if(kv.length == 2) {
				data.put(kv[0].toLowerCase(), kv[1]);
			}
		}
		
		// no pairs and no k/v, just a value (not empty)
		else if(!qsd.equals("")) {
			data.put(qsd.toLowerCase(), "");
		}
		
		return data;
	}
}