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diff --git a/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/ObjectVariantBinding.java b/bundles/org.simantics.databoard/src/org/simantics/databoard/binding/impl/ObjectVariantBinding.java
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+/*******************************************************************************
+ *  Copyright (c) 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.databoard.binding.impl;
+
+import java.util.Set;
+
+import org.simantics.databoard.adapter.AdaptException;
+import org.simantics.databoard.adapter.AdapterFactory;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.databoard.binding.RecordBinding;
+import org.simantics.databoard.binding.UnionBinding;
+import org.simantics.databoard.binding.VariantBinding;
+import org.simantics.databoard.binding.error.BindingConstructionException;
+import org.simantics.databoard.binding.error.BindingException;
+import org.simantics.databoard.binding.factory.BindingRepository;
+import org.simantics.databoard.binding.reflection.BindingRequest;
+import org.simantics.databoard.binding.reflection.ClassBindingFactory;
+import org.simantics.databoard.binding.reflection.VoidBinding;
+import org.simantics.databoard.type.Datatype;
+import org.simantics.databoard.type.RecordType;
+import org.simantics.databoard.type.UnionType;
+
+/**
+ * ObjectVariantBinding binds VariantType and Object.class.
+ * The implementation is immutable as Object.class is not a container, it is
+ * a value. <p>
+ * 
+ * ObjectVariantBinding understands many classes 
+ *   Collections: ArrayList, List, LinkedList, int[], .., other arrays [], Map, TreeMap, HashMap, Set, HashSet, TreeSet, 
+ *   Strings: String
+ *   immutable primitives: Integer, Boolean, ...
+ *   mutable primitives: MutableInteger, MutableBoolean, ...
+ *   classes: Record-classes, Bean-Classes, Immutable-Classes 
+ *   <code>null</code> is bound to a void.
+ *
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public class ObjectVariantBinding  extends VariantBinding {
+	
+	ClassBindingFactory bindingFactory;
+	AdapterFactory adapterFactory;
+	
+	public ObjectVariantBinding(ClassBindingFactory bindingFactory, AdapterFactory adapterFactory) {
+		this.bindingFactory = bindingFactory;
+		this.adapterFactory = adapterFactory;
+	}
+
+	public ClassBindingFactory getBindingFactory() {
+		return bindingFactory;
+	}
+	
+	public BindingRepository getRepository() {
+		return bindingFactory.getRepository();
+	}
+		
+	@Override
+	public Object create(Binding srcBinding, Object value) throws BindingException {
+		if (srcBinding instanceof VoidBinding) return null;
+		return value;
+		
+/*		try {
+			//Annotation[] annotations = new Annotation[ srcBinding.getComponentCount() ]; 
+			BindingRequest request = new BindingRequest( value.getClass() );
+			//request.componentBinding = srcBinding.getComponentCount()>0?srcBinding.getComponentBinding(0):null;
+			Binding dstBinding = bindingFactory.getBinding( request );
+			return adapterFactory.adapt(value, srcBinding, dstBinding); 
+		} catch (BindingConstructionException e) {
+			throw new BindingException(e);
+		} catch (AdaptException e) {
+			throw new BindingException(e);
+		}*/ 		
+	}
+
+	@Override
+	public Binding getContentBinding(Object variant) throws BindingException {
+		try {
+			if (variant==null) return VoidBinding.VOID_BINDING;
+			BindingRequest request = new BindingRequest(variant.getClass());
+			return bindingFactory.construct(request);
+		} catch (BindingConstructionException e) {
+			throw new BindingException(e);
+		}
+	}
+
+	@Override
+	public Datatype getContentType(Object variant) throws BindingException {
+		return getContentBinding(variant).type();
+	}
+
+	@Override
+	public Object getContent(Object variant, Binding binding)
+	throws BindingException {
+		try {
+			Binding binding1 = getContentBinding(variant);
+			Object value1 = variant;
+		
+			Binding binding2 = binding;
+			Object value2 = adapterFactory.adapt(value1, binding1, binding2);
+		
+			return value2;
+		} catch (AdaptException e) {
+			throw new BindingException(e);
+		}
+	}
+	
+	@Override
+	public Object getContent(Object variant)
+	throws BindingException {
+		return variant;
+	}	
+
+	@Override
+	public void setContent(Object variant, Binding binding, Object value)
+	throws BindingException {
+		if (variant==value) return;
+		try {
+			Binding binding1 = getContentBinding(variant);
+			Datatype type1 = binding1.type();
+			
+			Binding binding2 = binding;
+			Datatype type2 = binding2.type();
+			
+			// New value cannot be assigned to Object from different data type
+			if (!type1.equals(type2)) {
+				throw new BindingException("Cannot assign "+value.getClass()+" to "+variant.getClass());
+			}
+
+			// Can only assing to union or record of previous type
+			if (type1 instanceof RecordType) {
+				RecordType recordType = (RecordType) type1;
+				int count = recordType.getComponentCount();
+				RecordBinding rb1 = (RecordBinding) binding1;
+				RecordBinding rb2 = (RecordBinding) binding2;
+				Object resultValues[] = new Object[count];
+				for (int i=0; i<count; i++) {
+					Binding cb1 = rb1.componentBindings[i];
+					Binding cb2 = rb2.componentBindings[i];
+										
+					Object componentValue2 = rb2.getComponent(value, i);
+					Object componentValue1 = adapterFactory.adapt(componentValue2, cb2, cb1);
+					resultValues[i] = componentValue1;
+				}
+				rb1.setComponents(variant, resultValues);
+			} else if (type1 instanceof UnionType) {
+				UnionBinding ub1 = (UnionBinding) binding1;
+				UnionBinding ub2 = (UnionBinding) binding2;
+				int tag = ub2.getTag(value);
+				Binding cb1 = ub1.getComponentBindings()[tag];
+				Binding cb2 = ub2.getComponentBindings()[tag];
+				
+				Object componentValue2 = ub2.getValue(value);
+				Object componentValue1 = adapterFactory.adapt(componentValue2, cb2, cb1);
+				
+				ub1.setValue(variant, tag, componentValue1);
+			} else {
+				throw new BindingException("Cannot assign "+value.getClass()+" to "+variant.getClass());
+			}
+			
+		} catch (AdaptException e) {
+			throw new BindingException(e);
+		}
+			
+	}
+
+	@Override
+	public void assertInstaceIsValid(Object obj, Set<Object> validInstances) throws BindingException {
+		getContentBinding(obj).assertInstaceIsValid(obj);
+	}
+
+	@Override
+	public boolean isInstance(Object obj) {
+		return true;
+	}
+	
+	@Override
+	public boolean isImmutable() {
+		return true;
+	}
+
+	@Override
+	protected boolean baseEquals(Object obj) {
+		ObjectVariantBinding o = (ObjectVariantBinding)obj;
+		return super.baseEquals( obj ) && o.adapterFactory == adapterFactory && o.bindingFactory == bindingFactory;
+	}
+}