OO-2475: retrieve the participants of the selected group

src/main/java/org/olat/ims/qti21/ui/assessment/IdentitiesAssessmentTestCorrectionController.java

@@ -29,6 +29,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.stream.Collectors;
 
+import org.olat.basesecurity.GroupRoles;
 import org.olat.core.gui.UserRequest;
 import org.olat.core.gui.components.Component;
 import org.olat.core.gui.components.link.Link;
@@ -42,6 +43,7 @@ import org.olat.core.id.Identity;
 import org.olat.course.nodes.IQTESTCourseNode;
 import org.olat.course.run.environment.CourseEnvironment;
 import org.olat.fileresource.FileResourceManager;
+import org.olat.group.BusinessGroupService;
 import org.olat.ims.qti21.AssessmentItemSession;
 import org.olat.ims.qti21.AssessmentTestHelper;
 import org.olat.ims.qti21.AssessmentTestSession;
@@ -90,6 +92,8 @@ public class IdentitiesAssessmentTestCorrectionController extends BasicControlle
 	
 	@Autowired
 	private QTI21Service qtiService;
+	@Autowired
+	private BusinessGroupService businessGroupService;
 	
 	public IdentitiesAssessmentTestCorrectionController(UserRequest ureq, WindowControl wControl,
 			CourseEnvironment courseEnv, AssessmentToolOptions asOptions, IQTESTCourseNode courseNode) {
@@ -130,6 +134,10 @@ public class IdentitiesAssessmentTestCorrectionController extends BasicControlle
 		listenTo(overviewCtrl);
 	}
 	
+	public int getNumberOfAssessedIdentities() {
+		return assessedIdentities == null ? 0 : assessedIdentities.size();
+	}
+	
 	public AssessmentTestCorrection getTestCorrections() {
 		return testCorrections;
 	}
@@ -223,8 +231,17 @@ public class IdentitiesAssessmentTestCorrectionController extends BasicControlle
 	}
 	
 	private Set<Identity> getAssessedIdentities() {
-		List<Identity> identities = asOptions.getIdentities();
-		return new HashSet<>(identities);
+		List<Identity> identities;
+		if(asOptions.getGroup() != null) {
+			identities = businessGroupService.getMembers(asOptions.getGroup(), GroupRoles.participant.name());
+		} else {
+			identities = asOptions.getIdentities();
+		}
+		Set<Identity> uniqueIdentities = new HashSet<>();
+		if(identities != null) {
+			uniqueIdentities.addAll(identities);
+		}
+		return uniqueIdentities;
 	}
 	
 	private Map<Identity,AssessmentTestSession> getLastSessions(Set<Identity> identitiesSet) {

src/main/java/org/olat/ims/qti21/ui/assessment/QTI21CorrectionToolController.java

@@ -107,11 +107,16 @@ public class QTI21CorrectionToolController extends BasicController {
 	
 	public void doStartCorrection(UserRequest ureq) {
 		correctionCtrl = new IdentitiesAssessmentTestCorrectionController(ureq, getWindowControl(), courseEnv, asOptions, courseNode);
-		listenTo(correctionCtrl);
-		cmc = new CloseableModalController(getWindowControl(), "close", correctionCtrl.getInitialComponent(),
-				true, translate("correction"));
-		cmc.activate();
-		listenTo(cmc);
+		if(correctionCtrl.getNumberOfAssessedIdentities() == 0) {
+			showWarning("grade.nobody");
+			correctionCtrl = null;
+		} else {
+			listenTo(correctionCtrl);
+			cmc = new CloseableModalController(getWindowControl(), "close", correctionCtrl.getInitialComponent(),
+					true, translate("correction"));
+			cmc.activate();
+			listenTo(cmc);
+		}
 	}
 	
 	private void doUpdateCourseNode(AssessmentTestCorrection corrections, List<AssessmentTestSession> testSessionsToComplete) {

src/main/java/org/olat/ims/qti21/ui/assessment/_i18n/LocalStrings_de.properties

 #Tue Nov 15 16:25:36 CET 2016
 assessed.identity=Benutzer
 correction=Korrigieren
-correction.min.max.score=Result must ziwschen {0} und {1} sein
+correction.min.max.score=Resultat muss zwischen {0} und {1} sein
 correction.test.title=Korrigieren
 grade.no.items=Es gibt kein Resultat f\u00FCr diese Frage zu korrigieren.
+grade.nobody=Es gibt kein Resultat zu korrigieren.
 next.item=Zur n\u00E4chsten Frage
 not.responded=Die Frage wurde nicht beantworter
 overview.tests=\u00DCbersicht und abschliessen

src/main/java/org/olat/ims/qti21/ui/assessment/_i18n/LocalStrings_en.properties

@@ -4,6 +4,7 @@ correction=Correction
 correction.min.max.score=Score need to be between {0} and {1}.
 correction.test.title=Grade
 grade.no.items=There is no results to correct for this question.
+grade.nobody=There is no results to correct
 next.item=Next question
 not.responded=The question was not responded
 overview.tests=Overview and closing

src/main/java/org/olat/ims/qti21/ui/assessment/_i18n/LocalStrings_fr.properties

@@ -4,6 +4,7 @@ correction=Corriger
 correction.min.max.score=Le r\u00E9sultat doit \u00EAtre entre {0} et {1}.
 correction.test.title=Corriger
 grade.no.items=Il n'y a pas de r\u00E9sultats \u00E0 corriger pour cette question.
+grade.nobody=Il n'y a pas de r\u00E9sultats \u00E0 corriger.
 next.item=Question suivante
 not.responded=Il n'a pas \u00E9t\u00E9 r\u00E9pondue \u00E0 la question
 overview.tests=Aper\u00E7u and cl\u00F4ture