X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=org.simantics.interop.update%2Fsrc%2Forg%2Fsimantics%2Finterop%2Fupdate%2Fmodel%2FUpdateList.java;h=8679a3b3a399bf5be50f3f660554515c4690358b;hb=88fcf43b9eb2e217b50bf67cee58edaef4637a59;hp=21cde66e1c461e3b4ebb70444b3cccbf3fc282f2;hpb=328e8a54d282ed4a390e6eb9eda027b3ed599bdf;p=simantics%2Finterop.git

diff --git a/org.simantics.interop.update/src/org/simantics/interop/update/model/UpdateList.java b/org.simantics.interop.update/src/org/simantics/interop/update/model/UpdateList.java
index 21cde66..8679a3b 100644
--- a/org.simantics.interop.update/src/org/simantics/interop/update/model/UpdateList.java
+++ b/org.simantics.interop.update/src/org/simantics/interop/update/model/UpdateList.java
@@ -14,20 +14,20 @@ import org.simantics.interop.test.GraphChanges.Modification;
 import org.simantics.utils.datastructures.Pair;
 
 public class UpdateList {
-	private HashSet<PropertyChange> changes;
+	private List<PropertyChange> changes;
 	
 	public UpdateList() {
-		changes = new HashSet<>();
+		changes = new ArrayList<>();
 	}
 	
 	public UpdateList(Collection<PropertyChange> changes) {
-		this.changes = new HashSet<>(changes);
+		this.changes = new ArrayList<>(changes);
 	}
 	
 	public UpdateList(GraphChanges graphChanges, Collection<Modification> coll) {
-		this.changes = new HashSet<>();
+		this.changes = new ArrayList<>();
 		for (Modification p : coll) {
-			changes.add(create(graphChanges, p.getLeftSub(),p.getRightSub(),new Pair<Statement, Statement>(p.getLeftStm(), p.getRightStm())));
+			addChange(create(graphChanges, p.getLeftSub(),p.getRightSub(),new Pair<Statement, Statement>(p.getLeftStm(), p.getRightStm())));
 		}
 	}
 	
@@ -35,12 +35,13 @@ public class UpdateList {
 		return new PropertyChange(changes, left,right, change);
 	}
 	
-	public Collection<PropertyChange> getChanges() {
+	public List<PropertyChange> getChanges() {
 		return changes;
 	}
 
 	public void addChange(PropertyChange change) {
-		changes.add(change);
+	    if (!changes.contains(change))
+	        changes.add(change);
 	}
 	
 	public void removeChange(PropertyChange change) {