X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.objmap2%2Fsrc%2Forg%2Fsimantics%2Fobjmap%2Fgraph%2Frules%2FValueRule.java;h=2e2b81b191abe792826df445f55e548357df888c;hp=9ba9dba11274291b0dadb6664492542bd853951e;hb=0cb9829cf7fbee31bbc952c6313b01e195e8d010;hpb=6838557ccc94ba62e167fe3da59e04629f5cf9f6

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/ValueRule.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/ValueRule.java
index 9ba9dba11..2e2b81b19 100644
--- a/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/ValueRule.java
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/ValueRule.java
@@ -13,6 +13,9 @@ package org.simantics.objmap.graph.rules;
 
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+
+import java.util.Objects;
+
 import org.simantics.db.ReadGraph;
 import org.simantics.db.WriteGraph;
 import org.simantics.objmap.backward.IBackwardMapping;
@@ -57,7 +60,14 @@ public class ValueRule<Domain, Range> implements IBidirectionalMappingRule<Domai
         LOGGER.trace("    ValueRule.updateRange");
 		Object value = domainAccessor.get(g, domainElement);
 		return rangeAccessor.set(rangeElement, value);
-	}	
+	}
+	
+	@Override
+	public boolean checkChanges(ReadGraph g, IForwardMapping<Domain, Range> map, Domain domainElement,
+			Range rangeElement) throws MappingException {
+		Object value = rangeAccessor.get(rangeElement);
+		return !Objects.equals(value, domainAccessor.get(g, domainElement));
+	}
 	
 	public void createDomain(WriteGraph g, IBackwardMapping<Domain,Range> map, Domain domainElement, Range rangeElement) throws MappingException {
 		updateDomain(g, map, domainElement, rangeElement);