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%2Fforward%2FIForwardMappingRule.java;h=27a1aeb1af216883eb0e686382541abb8bc13025;hp=d6c707e026b5e5f1086f19599d2d7591d2650a8d;hb=d5db319fc2c400a8c76249e1ed7ffd9deb9f7609;hpb=9ad22e13e54566a293067b8708bff387682deb1b

diff --git a/bundles/org.simantics.objmap2/src/org/simantics/objmap/forward/IForwardMappingRule.java b/bundles/org.simantics.objmap2/src/org/simantics/objmap/forward/IForwardMappingRule.java
index d6c707e02..27a1aeb1a 100644
--- a/bundles/org.simantics.objmap2/src/org/simantics/objmap/forward/IForwardMappingRule.java
+++ b/bundles/org.simantics.objmap2/src/org/simantics/objmap/forward/IForwardMappingRule.java
@@ -15,6 +15,11 @@ import org.simantics.db.ReadGraph;
 import org.simantics.objmap.exceptions.MappingException;
 
 public interface IForwardMappingRule<Domain, Range> {
+	/**
+	 * Check whether a range element needs to be updated due to a change in the range element, without modifying the range element.
+	 */
+	boolean checkChanges(ReadGraph graph, IForwardMapping<Domain, Range> mapping, Domain domainElement, Range rangeElement) throws MappingException;
+	
 	/**
 	 * Modifies the range element so that it corresponds to the domain element.
 	 * @param g read transaction
@@ -24,6 +29,6 @@ public interface IForwardMappingRule<Domain, Range> {
 	 * @return true if the rule made some modifications
 	 * @throws MappingException
 	 */
-	boolean updateRange(ReadGraph graph, IForwardMapping<Domain, Range> mapping, Domain domainElement, Range rangeElement) throws MappingException;	
+	boolean updateRange(ReadGraph graph, IForwardMapping<Domain, Range> mapping, Domain domainElement, Range rangeElement) throws MappingException;
 	void createRange(ReadGraph graph, IForwardMapping<Domain, Range> mapping, Domain domainElement, Range rangeElement) throws MappingException;
 }