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diff --git a/org.simantics.g3d/src/org/simantics/g3d/objmap/rules/range/GetSetValueAccessor.java b/org.simantics.g3d/src/org/simantics/g3d/objmap/rules/range/GetSetValueAccessor.java
new file mode 100644
index 00000000..f7da6538
--- /dev/null
+++ b/org.simantics.g3d/src/org/simantics/g3d/objmap/rules/range/GetSetValueAccessor.java
@@ -0,0 +1,73 @@
+package org.simantics.g3d.objmap.rules.range;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import org.simantics.objmap.MappingException;
+import org.simantics.objmap.rules.range.IRangeAccessor;
+
+/**
+ * Accessor for mapped value. Uses two methods:
+ * - Getter: returns the current value.
+ * - Setter: sets the current value. The value may be null. (if setter parameter is primitive, null value is not mapped).
+ * 
+ * @author Marko Luukkainen <marko.luukkainen@vtt.fi>
+ *
+ * @param <T>
+ */
+public class GetSetValueAccessor<T>  implements IRangeAccessor<T> {
+	
+	private Method getter;
+	private Method setter;
+	private boolean primitive;
+	
+	public GetSetValueAccessor(Method getter, Method setter) {
+		this.getter = getter;
+		this.setter = setter;
+		this.primitive = setter.getParameterTypes()[0].isPrimitive();
+	}
+	
+	@SuppressWarnings("unchecked")
+	public T get(Object element) throws org.simantics.objmap.MappingException {
+		try {
+			return (T) getter.invoke(element);
+		} catch (IllegalArgumentException e) {
+			throw new MappingException(e);
+		} catch (IllegalAccessException e) {
+			throw new MappingException(e);
+		} catch (InvocationTargetException e) {
+			throw new MappingException(e);
+		}
+	};
+
+	@Override
+	public boolean set(Object element, T value)
+			throws MappingException {
+		if (value == null && primitive)
+			return false;
+		if (equal(get(element),value))
+			return false;
+		try {
+			setter.invoke(element, value);
+		} catch (IllegalArgumentException e) {
+			throw new MappingException(e);
+		} catch (IllegalAccessException e) {
+			throw new MappingException(e);
+		} catch (InvocationTargetException e) {
+			throw new MappingException(e);
+		}
+		return true;
+		
+	}
+	
+	private boolean equal(Object v1, Object v2) {
+		if (v1 == null) {
+			if (v2 == null)
+				return true;
+			return false;
+		} else if (v2 == null) {
+			return false;
+		}
+		return v1.equals(v2);
+	}
+}