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diff --git a/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/LazyParametrizedGraphLabeler.java b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/LazyParametrizedGraphLabeler.java
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+++ b/bundles/org.simantics.browsing.ui.graph.impl/src/org/simantics/browsing/ui/graph/impl/LazyParametrizedGraphLabeler.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.browsing.ui.graph.impl;
+
+import java.util.Map;
+
+import org.simantics.browsing.ui.BuiltinKeys;
+import org.simantics.browsing.ui.DataSource;
+import org.simantics.browsing.ui.NodeContext;
+import org.simantics.browsing.ui.PrimitiveQueryUpdater;
+import org.simantics.browsing.ui.common.labelers.LabelerContent;
+import org.simantics.browsing.ui.common.labelers.LabelerStub;
+import org.simantics.browsing.ui.graph.impl.request.ParametrizedResourceQuery;
+import org.simantics.db.ReadGraph;
+import org.simantics.db.exception.DatabaseException;
+import org.simantics.db.procedure.Listener;
+
+/**
+ * A version of LazyLabeler that uses a set of arbitrary parameters to describe
+ * the label resource query within the class.
+ * 
+ * @author Tuukka Lehtonen
+ * 
+ * @see LazyGraphLabeler a non-parametrized version (more light-weight)
+ */
+public abstract class LazyParametrizedGraphLabeler extends LabelerStub {
+
+    private final ParametrizedResourceQuery<LabelerContent> labelQuery;
+    private final Listener<LabelerContent>     labelProcedure;
+    private final PrimitiveQueryUpdater                     updater;
+
+    // DEBUG
+    static int debugCounter = 0;
+
+    public LazyParametrizedGraphLabeler(final PrimitiveQueryUpdater updater, final NodeContext context, final BuiltinKeys.LabelerKey key, Object... parameters) {
+        this.updater = updater;
+        this.labelQuery = new ParametrizedResourceQuery<LabelerContent>(getClass(), context, parameters) {
+            @Override
+            public LabelerContent perform(ReadGraph graph) throws DatabaseException {
+                return new LabelerContent(category(graph), labels(graph));
+            }
+
+        };
+        this.labelProcedure = new Listener<LabelerContent>() {
+
+            @Override
+            public void execute(LabelerContent result) {
+                setContent(result);
+                updater.scheduleReplace(context, key, LazyParametrizedGraphLabeler.this);
+            }
+
+            @Override
+            public void exception(Throwable t) {
+                t.printStackTrace();
+            }
+
+            @Override
+            public boolean isDisposed() {
+                return updater.isDisposed();
+            }
+
+        };
+    }
+
+    @Override
+    public Map<String, String> getLabels() {
+//        new Exception().printStackTrace();
+        if (content == LabelerContent.NO_CONTENT) {
+            final DataSource<ReadGraph> source = updater.getDataSource(ReadGraph.class);
+
+            source.schedule(graph -> {
+                try {
+                    graph.syncRequest(labelQuery, labelProcedure);
+                } catch (DatabaseException e) {
+                    e.printStackTrace();
+                }
+            });
+        }
+
+        return content.labels;
+    }
+
+    // OVERRIDE
+
+    public abstract Map<String, String> labels(ReadGraph graph) throws DatabaseException;
+
+    public int category(ReadGraph graph) {
+        return content.category;
+    }
+
+}