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diff --git a/bundles/org.simantics.db.common/src/org/simantics/db/common/request/TransientResourceRead.java b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/TransientResourceRead.java
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+++ b/bundles/org.simantics.db.common/src/org/simantics/db/common/request/TransientResourceRead.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.request;
+
+import org.simantics.db.ReadGraph;
+import org.simantics.db.Resource;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.request.ReadExt;
+import org.simantics.db.service.QueryControl;
+
+abstract public class TransientResourceRead<R> extends BinaryRead<Object,Resource,R> implements ReadExt {
+
+	protected static final Object WITH_PARENT = new Object();
+	
+	public TransientResourceRead(ReadGraph graph, Resource parameter) throws DatabaseException {
+		this(graph, graph.getService(QueryControl.class), parameter);
+	}
+	
+	public TransientResourceRead(ReadGraph graph, QueryControl qc, Resource parameter) throws DatabaseException {
+		super(resolveFirstParameter(graph, qc), parameter);
+	}
+
+	final private static Object resolveFirstParameter(ReadGraph graph, QueryControl qc) throws DatabaseException {
+		if(qc.hasParentRequest(graph)) return WITH_PARENT;
+		else return graph.getModificationCounter();
+	}
+
+	@Override
+	final public R perform(ReadGraph _graph) throws DatabaseException {
+		if(parameter == WITH_PARENT) {
+			return perform(_graph, parameter2);
+		} else {
+			QueryControl qc = _graph.getService(QueryControl.class);
+			ReadGraph graph = qc.getIndependentGraph(_graph);
+			return perform(graph, parameter2);
+		}
+	}
+
+	abstract public R perform(ReadGraph graph, Resource parameter) throws DatabaseException;
+    
+	@Override
+	public boolean isImmutable(ReadGraph graph) throws DatabaseException {
+		return graph.isImmutable(parameter2);
+	}
+	
+}