X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.mapping%2Fsrc%2Forg%2Fsimantics%2Fmapping%2Frule%2Finstructions%2FQueryRuleInstruction.java;h=404df9c4871f625999c74858142d91835da56895;hp=dbb0e7ca40459d7876bcc8d8f025d1ae9f7d7924;hb=1dfeb7d5c49b1391cd9d877e1eddab18995cb151;hpb=0ae2b770234dfc3cbb18bd38f324125cf0faca07

diff --git a/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/QueryRuleInstruction.java b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/QueryRuleInstruction.java
index dbb0e7ca4..404df9c48 100644
--- a/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/QueryRuleInstruction.java
+++ b/bundles/org.simantics.mapping/src/org/simantics/mapping/rule/instructions/QueryRuleInstruction.java
@@ -11,18 +11,21 @@
  *******************************************************************************/
 package org.simantics.mapping.rule.instructions;
 
-import gnu.trove.map.hash.TIntIntHashMap;
-import gnu.trove.procedure.TIntProcedure;
-import gnu.trove.set.hash.TIntHashSet;
-
 import org.simantics.db.ReadGraph;
 import org.simantics.db.WriteGraph;
 import org.simantics.db.exception.DatabaseException;
 import org.simantics.db.request.Read;
 import org.simantics.layer0.utils.triggers.IModification;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import gnu.trove.map.hash.TIntIntHashMap;
+import gnu.trove.procedure.TIntProcedure;
+import gnu.trove.set.hash.TIntHashSet;
 
 public class QueryRuleInstruction implements IRuleInstruction {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(QueryRuleInstruction.class);
 	IRuleInstruction rule;
 	int[] variables;
 	int workSpace;
@@ -92,7 +95,7 @@ public class QueryRuleInstruction implements IRuleInstruction {
 				if(parameter != null)
 					result += parameter.hashCode();
 				else
-					System.err.println("Parameter is null!!!");
+					LOGGER.error("Parameter is null!!!");
 			}
 			return result;
 		}