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diff --git a/org.simantics.g3d/src/org/simantics/g3d/tools/AdaptationUtils.java b/org.simantics.g3d/src/org/simantics/g3d/tools/AdaptationUtils.java
new file mode 100644
index 00000000..5902b0ab
--- /dev/null
+++ b/org.simantics.g3d/src/org/simantics/g3d/tools/AdaptationUtils.java
@@ -0,0 +1,89 @@
+package org.simantics.g3d.tools;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+
+import org.eclipse.core.runtime.IAdaptable;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.simantics.utils.Container;
+
+/**
+ * @author Antti Villberg
+ * @author Marko Luukkainen
+ * 
+ * TODO: merge to os.ui.utils.
+ */
+public class AdaptationUtils {
+	/**
+	 * 
+	 * @param o
+	 * @param clazz
+	 * @return object of given class or null
+	 */
+	@SuppressWarnings("unchecked")
+    public static <T> T adaptToSingle(Object o, Class<T> clazz) {
+        if (o instanceof IStructuredSelection) {
+            IStructuredSelection iss = (IStructuredSelection) o;
+            if (iss.size() != 1)
+                return null;
+            Object element = iss.getFirstElement();
+            return adaptToSingle(element, clazz);
+        } else if (o instanceof Collection<?>) {
+            Collection<?> c = (Collection<?>) o;
+            if (c.size() != 1)
+                return null;
+            Object element = c.iterator().next();
+            return adaptToSingle(element, clazz);
+        } else if (o instanceof IAdaptable) {
+            IAdaptable a = (IAdaptable) o;
+            return (T)a.getAdapter(clazz);
+        } else if (clazz.isInstance(o)) {
+            return (T)o;
+        } else if (o instanceof Container<?>) {
+            Object obj = ((Container<?>) o).get();
+            if (obj == o)
+                return null;
+            return adaptToSingle(obj, clazz);
+        }
+        return null;
+    }
+	/**
+	 * 
+	 * @param o
+	 * @param clazz
+	 * @return collection of objects of given class. 
+	 */
+	@SuppressWarnings("unchecked")
+	public static <T> Collection<T> adaptToCollection(Object o, Class<T> clazz) {
+		if (clazz.isInstance(o)) {
+            return Collections.singletonList((T)o);
+		} else if (o instanceof IStructuredSelection) {
+            IStructuredSelection iss = (IStructuredSelection) o;
+            return adaptToCollection(iss.toArray(), clazz);
+        } else if (o instanceof Collection<?>) {
+            Collection<?> c = (Collection<?>) o;
+            return adaptToCollection(c.toArray(), clazz);
+        } else if (o instanceof IAdaptable) {
+            IAdaptable a = (IAdaptable) o;
+            return Collections.singletonList((T)a.getAdapter(clazz));
+        } else if (o instanceof Container<?>) {
+            Object obj = ((Container<?>) o).get();
+            if (obj == o)
+                return Collections.EMPTY_LIST;
+            return adaptToCollection(obj, clazz);
+        }
+        return Collections.EMPTY_LIST;
+    }
+	
+	public static <T> Collection<T> adaptToCollection(Object arr[], Class<T> clazz) {
+		Collection<T> result = new ArrayList<T>();
+		for (Object o : arr) {
+			Collection<T> tColl = adaptToCollection(o, clazz); 
+			for (T t : tColl)
+				if (t != null && !result.contains(t))
+					result.add(t);
+		}
+		return result;
+	}
+}