CONDEC-686: Add filter criteria used in code class view to FilterSett…

…ings (#287)

* Set default link distance to 3 in FilterSettings class

* Remove warning text from link distance input field to simplify code (it is not really necessary)

* Add minDegree and maxDegree to the FilterSettings class

* Change getClassTreant REST method to POST method and pass FilterSettings object instead of single filter criteria as parameters

* Add velocity template for the node degree filter (min and max link number) to make it reusable

* Translate filter criteria for node degree (number of links) and isDecisionKnowledgeOnly using i18n properties

* Add filter criteria isTestCodeShown to FilterSettings

* Add methods isElementMatchingDegreeFilter and isElementMatchingIsTestCodeFilter in FilteringManager and use it in Treant

* Remove usage of GenericLinkManager in Treant because the Treant should not know this class, it should only use the KnowledgeGraph for better separation of concerns

* Remove isCollapsed parameter from createTreantNode method because we use the linkDistance filter instead

* Fix that startTime (createdAfter/createdEarliest) and endTime (createdBefore/createdLatest) were swapped in graph view of Jira issue view

src/main/java/de/uhd/ifi/se/decision/management/jira/extraction/GitClient.java

@@ -931,7 +931,7 @@ private boolean checkout(String checkoutObjectName, String repoUri, boolean isCo
 			try {
 				gits.get(repoUri).checkout().setName(checkoutName).call();
 			} catch (GitAPIException | JGitInternalException e) {
-				System.out.println("Could not checkout " + checkoutName);
+				System.out.println("Could not checkout " + checkoutName + e.getMessage());
 				LOGGER.error("Could not checkout " + checkoutName + ". " + e.getMessage());
 				return false;
 			}

src/main/java/de/uhd/ifi/se/decision/management/jira/filtering/FilterSettings.java

@@ -36,7 +36,10 @@ public class FilterSettings {
 	private List<String> linkTypes;
 	private List<String> decisionGroups;
 	private boolean isOnlyDecisionKnowledgeShown;
+	private boolean isTestCodeShown;
 	private int linkDistance;
+	private int minDegree;
+	private int maxDegree;
 
 	@XmlElement
 	private long startDate;
@@ -56,7 +59,10 @@ public FilterSettings(@JsonProperty("projectKey") String projectKey,
 		this.knowledgeStatus = KnowledgeStatus.getAllKnowledgeStatus();
 		this.decisionGroups = DecisionGroupManager.getAllDecisionGroups(projectKey);
 		this.isOnlyDecisionKnowledgeShown = false;
-		this.linkDistance = 4;
+		this.isTestCodeShown = false;
+		this.linkDistance = 3;
+		this.minDegree = 0;
+		this.maxDegree = 50;
 	}
 
 	public FilterSettings(String projectKey, String query, ApplicationUser user) {
@@ -298,8 +304,58 @@ public int getLinkDistance() {
 	 *            filtered graph. All nodes with a greater distance are not
 	 *            included.
 	 */
-	@JsonProperty("linkDistance")
 	public void setLinkDistance(int linkDistance) {
 		this.linkDistance = linkDistance;
 	}
+
+	/**
+	 * @return minimal number of links that a knowledge element (=node) needs to
+	 *         have to be included in the filtered graph.
+	 */
+	public int getMinDegree() {
+		return minDegree;
+	}
+
+	/**
+	 * @param minDegree
+	 *            minimal number of links that a knowledge element (=node) needs to
+	 *            have to be included in the filtered graph.
+	 */
+	public void setMinDegree(int minDegree) {
+		this.minDegree = minDegree;
+	}
+
+	/**
+	 * @return maximal number of links that a knowledge element (=node) needs to
+	 *         have to be included in the filtered graph.
+	 */
+	public int getMaxDegree() {
+		return maxDegree;
+	}
+
+	/**
+	 * @param maxDegree
+	 *            maximal number of links that a knowledge element (=node) needs to
+	 *            have to be included in the filtered graph.
+	 */
+	public void setMaxDegree(int maxDegree) {
+		this.maxDegree = maxDegree;
+	}
+
+	/**
+	 * @return true if code classes for unit tests are shown in the filtered graph.
+	 */
+	public boolean isTestCodeShown() {
+		return isTestCodeShown;
+	}
+
+	/**
+	 * @param isTestCodeShown
+	 *            true if code classes for unit tests are shown in the filtered
+	 *            graph.
+	 */
+	@JsonProperty("isTestCodeShown")
+	public void setTestCodeShown(boolean isTestCodeShown) {
+		this.isTestCodeShown = isTestCodeShown;
+	}
 }