Display how many pairs've been labelled matches and non matches zingg…

…AI#87

core/src/main/java/zingg/Labeller.java

@@ -24,6 +24,7 @@ public class Labeller extends ZinggBase {
 
 	protected static String name = "zingg.Labeller";
 	public static final Log LOG = LogFactory.getLog(Labeller.class);
+	int positivePairs, negativePairs;
 
 	public Labeller() {
 		setZinggOptions(ZinggOptions.LABEL);
@@ -96,11 +97,12 @@ public void processRecordsCli(Dataset<Row> lines) throws ZinggClientException {
 				String msgHeader = msg1 + msg2;
 
 				selected_option = displayRecordsAndGetUserInput(DSUtil.select(currentPair, displayCols), msgHeader);
+				showLabellerStat(selected_option);
 				if (selected_option == 9) {
 					LOG.info("User has quit in the middle. Updating the records.");
 					break;
 				}
-				updatedRecords = updateRecords(selected_option, currentPair, updatedRecords);				
+				updatedRecords = updateRecords(selected_option, currentPair, updatedRecords);
 			}
 			writeLabelledOutput(updatedRecords);
 			LOG.warn("Processing finished.");
@@ -188,6 +190,18 @@ int readCliInput() {
 		return selection;
 	}
 
+	private void showLabellerStat(int selected_option) {
+		if (selected_option == ColValues.IS_MATCH_PREDICTION) {
+			++positivePairs;
+		}
+		else if (selected_option == ColValues.IS_NOT_A_MATCH_PREDICTION) {
+			++negativePairs;
+		}
+		System.out.print("\tSo far, " + positivePairs + " pair(s) have been marked " + LabelMatchType.MATCH);
+		System.out.print(" and " + negativePairs + " pair(s) have been marked " + LabelMatchType.DO_NOT_MATCH);
+		System.out.println();
+	}
+
 	void writeLabelledOutput(Dataset<Row> records) {
 		if (records == null) {
 			LOG.warn("No records to be labelled.");