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diff --git a/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessorWithDefault.java b/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessorWithDefault.java
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--- /dev/null
+++ b/org.simantics.objmap2/src/org/simantics/objmap/graph/rules/range/FieldAccessorWithDefault.java
@@ -0,0 +1,40 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.objmap.graph.rules.range;
+
+import java.lang.reflect.Field;
+
+import org.simantics.objmap.exceptions.MappingException;
+
+
+/**
+ * Accesses the given field of the element.
+ * @author Hannu Niemist�
+ */
+public class FieldAccessorWithDefault<Range,T> extends FieldAccessor<Range,T> {
+    
+	T defaultValue;
+
+	public FieldAccessorWithDefault(Field field, T defaultValue) {
+        super(field);
+        this.defaultValue = defaultValue;
+    }
+
+    @Override
+	public T get(Range element) throws MappingException {
+		T value = super.get(element);
+		if(value == null)
+		    return defaultValue;
+		else
+		    return value;
+	}
+}