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diff --git a/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/DirectObjects.java b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/DirectObjects.java
new file mode 100644
index 000000000..f42a1ef31
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+++ b/bundles/org.simantics.db.impl/src/org/simantics/db/impl/query/DirectObjects.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.impl.query;
+
+import java.util.Collection;
+import java.util.concurrent.Semaphore;
+
+import org.simantics.db.common.exception.DebugException;
+import org.simantics.db.impl.graph.ReadGraphImpl;
+import org.simantics.db.procedure.ListenerBase;
+import org.simantics.db.request.RequestFlags;
+
+final public class DirectObjects extends CollectionBinaryQuery<IntProcedure> {
+
+	private DirectObjects(final int r1, final int r2) {
+		super(r1, r2);
+	}
+
+	@Override
+	public int type() {
+		return RequestFlags.INVALIDATE;
+	}
+	
+    @Override
+    public void clearResult(QuerySupport support) {
+    	setResult(INVALID_RESULT);
+    }
+
+	final static DirectObjects entry(final QueryProcessor provider, final int r1, final int r2) {
+
+		return (DirectObjects)provider.directObjectsMap.get(id(r1,r2));
+
+	}
+	
+	final static Collection<DirectObjects> entries(final QueryProcessor processor, final int r1) {
+		DoubleKeyQueryHashMap<IntProcedure> hash = processor.directObjectsMap;
+		return hash.values(r1);
+	}
+
+	final static void runner(ReadGraphImpl graph, final int r1, final int r2, CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {
+
+    	QueryProcessor processor = graph.processor;
+		
+		DirectObjects entry = (DirectObjects)processor.directObjectsMap.get(id(r1,r2));
+		if(entry == null) {
+			
+        	entry = new DirectObjects(r1, r2);
+        	entry.setPending();
+        	entry.clearResult(processor.querySupport);
+        	entry.putEntry(processor);
+        	
+			processor.performForEach(graph, entry, parent, listener, procedure);
+			
+		} else {
+			
+            if(entry.isPending()) {
+                synchronized(entry) {
+                    if(entry.isPending()) {
+                        processor.registerDependencies(graph, entry, parent, listener, procedure, false);
+						entry.computeForEach(graph, processor, procedure, true);
+                        return;
+                    }
+                }
+            }
+        	
+			processor.performForEach(graph, entry, parent, listener, procedure);
+			
+		}
+
+	}
+
+	final public static void queryEach(ReadGraphImpl graph, final int r1, final int r2, final QueryProcessor provider, final CacheEntry parent, final ListenerBase listener, final IntProcedure procedure) {
+
+        assert(r1 != 0);
+        assert(r2 != 0);
+        
+        if(parent == null && listener == null) {
+        	DirectObjects.computeForEach(graph, r1, r2, null, procedure);
+        } else {
+        	runner(graph, r1, r2, parent, listener, procedure);
+        }
+
+	}
+
+	@Override
+	public BinaryQuery<IntProcedure> getEntry(QueryProcessor provider) {
+		return provider.directObjectsMap.get(id);
+	}
+
+	@Override
+	public void putEntry(QueryProcessor provider) {
+		provider.directObjectsMap.put(id, this);
+	}
+
+	@Override
+	final public void removeEntry(QueryProcessor provider) {
+		provider.directObjectsMap.remove(id);
+	}
+
+	@Override
+	public void computeForEach(ReadGraphImpl graph, final QueryProcessor queryProvider, final IntProcedure procedure, final boolean store) {
+		computeForEach(graph, r1(), r2(), this, procedure);
+	}
+
+	static public void computeForEach(ReadGraphImpl graph, int r1, int r2, final DirectObjects entry, final IntProcedure procedure) {
+
+		QueryProcessor processor = graph.processor;
+		
+		processor.querySupport.ensureLoaded(graph, r1, r2);
+
+		processor.querySupport.getObjects(graph, r1, r2, new IntProcedure() {
+
+			@Override
+			public void execute(ReadGraphImpl graph, int i) {
+				procedure.execute(graph, i);
+			}
+
+			@Override
+			public void finished(ReadGraphImpl graph) {
+			}
+
+			@Override
+			public void exception(ReadGraphImpl graph, Throwable t) {
+				if(DebugException.DEBUG) new DebugException(t).printStackTrace();
+			}
+
+		});
+
+		if(entry != null) entry.finish(graph, processor);
+		procedure.finished(graph);
+
+	}
+
+	@Override
+	public String toString() {
+		return "DirectObjects[" + r1() + " - " + r2() + "]";
+	}
+
+	@Override
+	public void setReady() {
+		statusOrException = READY;
+	}
+	
+	final private void finish(ReadGraphImpl graph, QueryProcessor provider) {
+		setReady();
+	}
+
+	@Override
+	public void performFromCache(ReadGraphImpl graph, QueryProcessor provider, IntProcedure procedure) {
+
+		assert(isReady());
+		computeForEach(graph, provider, procedure, false);
+
+	}
+
+	@Override
+	public void recompute(ReadGraphImpl graph, QueryProcessor provider) {
+
+        final Semaphore s = new Semaphore(0);
+		
+		computeForEach(graph, provider, new IntProcedure() {
+
+			@Override
+			public void finished(ReadGraphImpl graph) {
+				s.release();
+			}
+
+			@Override
+			public void exception(ReadGraphImpl graph, Throwable t) {
+				throw new Error("Error in recompute.", t);
+			}
+
+			@Override
+			public void execute(ReadGraphImpl graphd, int i) {
+			}
+
+		}, true);
+
+        while(!s.tryAcquire()) {
+        	provider.resume(graph);
+        }
+
+	}
+
+    @Override
+    boolean isImmutable(ReadGraphImpl graph) {
+    	return graph.processor.isImmutable(r1());
+    }
+	
+}
+