minor refactoring (#76)

Author: luchengqi7

src/main/java/org/matsim/rebalancing/WaitingPointBasedRebalancingStrategyParams.java

@@ -23,8 +23,8 @@
 import org.matsim.core.config.ReflectiveConfigGroup;
 
 /**
+ * The placeholder, which will be moved to the matsim-lib later.
  * @author Chengqi Lu
- * // TODO this is not needed for Kelheim scenario. I will move it to the matsim-lib after eeverything works well here.
  */
 public final class WaitingPointBasedRebalancingStrategyParams extends ReflectiveConfigGroup
 		implements RebalancingParams.RebalancingStrategyParams {
@@ -34,9 +34,17 @@ public final class WaitingPointBasedRebalancingStrategyParams extends Reflective
 	@Comment("The path to the waiting point file (csv/tsv) can be specified here. title row of the file: link_id	capacity" +
 		"If unspecified (i.e., empty string by default), starting points of the fleet will be used as the waiting points")
 	@NotNull
-	public String waitingPointPath = "";
+	private String waitingPointPath = "";
 
 	public WaitingPointBasedRebalancingStrategyParams() {
 		super(SET_NAME);
 	}
+
+	public String getWaitingPointPath() {
+		return waitingPointPath;
+	}
+
+	public void setWaitingPointPath(String waitingPointPath) {
+		this.waitingPointPath = waitingPointPath;
+	}
 }

src/main/java/org/matsim/rebalancing/WaitingPointsBasedRebalancingModule.java

@@ -33,6 +33,7 @@
 import java.io.IOException;
 
 /**
+ * Temporary installation module for the waiting point based rebalancing strategy.
  * @author Chengqi Lu
  */
 public class WaitingPointsBasedRebalancingModule extends AbstractDvrpModeModule {

src/main/java/org/matsim/rebalancing/WaitingPointsBasedRebalancingStrategy.java

@@ -27,6 +27,7 @@
 import java.util.stream.Stream;
 
 /**
+ * The waiting point based rebalancing strategy will relocate vehicles to nearest waiting point that still has capacity when it becomes idle.
  * @author Chengqi Lu
  */
 class WaitingPointsBasedRebalancingStrategy implements RebalancingStrategy {
@@ -50,9 +51,9 @@ private void initialize(String waitingPointsPath) throws IOException {
 			log.info("Reading waiting points from the file...");
 			try (CSVParser parser = new CSVParser(Files.newBufferedReader(Path.of(waitingPointsPath), StandardCharsets.UTF_8),
 				CSVFormat.TDF.builder().setHeader().setSkipHeaderRecord(true).build())) {
-				for (CSVRecord record : parser) {
-					Link waitingPointLink = network.getLinks().get(Id.createLinkId(record.get("link_id")));
-					Integer capacity = Integer.parseInt(record.get("capacity"));
+				for (CSVRecord csvRecord : parser) {
+					Link waitingPointLink = network.getLinks().get(Id.createLinkId(csvRecord.get("link_id")));
+					Integer capacity = Integer.parseInt(csvRecord.get("capacity"));
 					waitingPointsCapcityMap.put(waitingPointLink.getId(), capacity);
 				}
 			}