/*******************************************************************************
 * 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.common.processors;

import java.util.Collection;
import java.util.Collections;
import java.util.Map;

import org.simantics.browsing.ui.BuiltinKeys;
import org.simantics.browsing.ui.NodeContext;
import org.simantics.browsing.ui.NodeQueryManager;
import org.simantics.browsing.ui.PrimitiveQueryUpdater;
import org.simantics.browsing.ui.BuiltinKeys.LabelerKey;
import org.simantics.browsing.ui.GraphExplorer.ModificationContext;
import org.simantics.browsing.ui.NodeContext.QueryKey;
import org.simantics.browsing.ui.content.Labeler;
import org.simantics.browsing.ui.content.LabelerFactory;

public class DefaultLabelerFactoriesProcessor extends AbstractNodeQueryProcessor<Collection<LabelerFactory>> {

    int koss;

    @Override
    public QueryKey<Collection<LabelerFactory>> getIdentifier() {
        return BuiltinKeys.LABELER_FACTORIES;
    }

    @Override
    public Collection<LabelerFactory> query(NodeQueryManager manager, NodeContext context) {
        return Collections.singleton((LabelerFactory) new LabelerFactory() {
            @Override
            public Labeler create(PrimitiveQueryUpdater updater, final NodeContext context, LabelerKey key) {

                if (++koss % 1000 == 0)
                    System.out.println("Produced " + koss + " labels");

                return new Labeler() {
                    @Override
                    public Map<String, String> getLabels() {
                        return Collections.singletonMap("single", context.getConstant(BuiltinKeys.INPUT).toString());
                    }
                    @Override
                    public Map<String, String> getRuntimeLabels() {
                        return Collections.emptyMap();
                    }
                    @Override
                    public int getCategory() {
                        return 0;
                    }
                    @Override
                    public Modifier getModifier(ModificationContext modificationContext, String key) {
                        return null;
                    }
                    @Override
                    public void setListener(LabelerListener listener) {
                        // Intentionally blank, cannot implement listening.
                    }
                };
            }
        });
    }

    @Override
    public String toString() {
        return "LabelerFactoriesProcessor";
    }

}