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diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/adaption/SimpleContextualAdapter.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/adaption/SimpleContextualAdapter.java
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/adaption/SimpleContextualAdapter.java
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+/*******************************************************************************
+ * 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.db.common.adaption;
+
+import org.simantics.db.AsyncReadGraph;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.adaption.Adapter;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.procedure.AsyncProcedure;
+import org.simantics.db.request.Read;
+
+public abstract class SimpleContextualAdapter<T,C> implements Adapter<T, C> {
+
+    public abstract T adapt(ReadGraph g, Resource source, C context) throws DatabaseException;
+
+    @Override
+    public void adapt(AsyncReadGraph g, final Resource source, final C context, AsyncProcedure<T> procedure) {
+
+        //System.out.println("SimpleAdapter.adapt" + this.getClass());
+
+        g.asyncRequest(new Read<T>() {
+
+            @Override
+            public T perform(ReadGraph graph) throws DatabaseException {
+                //System.out.println("SimpleAdapter.perform" + this.getClass());
+                return adapt(graph, source, context);
+            }
+            
+            @Override
+            public String toString() {
+            	return SimpleContextualAdapter.this.toString();
+            }
+            
+        }, procedure);
+
+    }
+
+}