1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.browsing.ui.graph.impl.contribution;
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14 import java.util.Collections;
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15 import java.util.Map;
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17 import org.eclipse.jface.resource.ImageDescriptor;
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18 import org.simantics.browsing.ui.BuiltinKeys;
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19 import org.simantics.browsing.ui.BuiltinKeys.ImagerKey;
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20 import org.simantics.browsing.ui.DataSource;
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21 import org.simantics.browsing.ui.NodeContext;
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22 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
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23 import org.simantics.browsing.ui.content.Imager;
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24 import org.simantics.browsing.ui.graph.impl.request.ResourceQuery;
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25 import org.simantics.db.ReadGraph;
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26 import org.simantics.db.exception.DatabaseException;
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27 import org.simantics.db.layer0.exception.PendingVariableException;
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28 import org.simantics.db.procedure.Listener;
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29 import org.simantics.db.procedure.Procedure;
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30 import org.simantics.utils.ui.ErrorLogger;
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32 public abstract class FinalImagerContributionImpl implements Imager {
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34 private final static Map<String, ImageDescriptor> PENDING = Collections.emptyMap();
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36 protected final PrimitiveQueryUpdater updater;
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37 private final ResourceQuery<Map<String, ImageDescriptor>> imagerQuery;
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39 protected final NodeContext context;
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40 private final BuiltinKeys.ImagerKey key;
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42 protected Map<String, ImageDescriptor> content = null;
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44 public Object getIdentity(ImagerKey key) {
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48 public FinalImagerContributionImpl(final PrimitiveQueryUpdater updater, final NodeContext context, final ImagerKey key) {
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50 this.updater = updater;
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51 this.context = context;
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54 imagerQuery = new ResourceQuery<Map<String, ImageDescriptor>>(getIdentity(key), context) {
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57 public Map<String, ImageDescriptor> perform(ReadGraph graph) throws DatabaseException {
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59 return getDescriptors(graph, context);
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60 } catch (PendingVariableException e) {
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62 } catch (DatabaseException e) {
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64 } catch (Throwable t) {
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65 ErrorLogger.defaultLogError("LazyGraphLabeler.labelQuery produced unexpected exception.", t);
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71 public String toString() {
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72 return FinalImagerContributionImpl.this + " with context " + context;
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79 protected Procedure<Map<String, ImageDescriptor>> createProcedure() {
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81 return new Procedure<Map<String, ImageDescriptor>>() {
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84 public void execute(Map<String, ImageDescriptor> result) {
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85 replaceResult(result);
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89 public void exception(Throwable t) {
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90 ErrorLogger.defaultLogError("FinalImagerContributionImpl.imagerQuery failed, see exception for details.", t);
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97 protected void replaceResult(Map<String, ImageDescriptor> desc) {
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99 updater.scheduleReplace(context, key, this);
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102 @SuppressWarnings("unchecked")
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104 public ImageDescriptor getImage(String key) {
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106 if (content == null) {
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110 final DataSource<ReadGraph> source = updater.getDataSource(ReadGraph.class);
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111 assert(source != null);
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113 final Procedure<Map<String, ImageDescriptor>> procedure = createProcedure();
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114 source.schedule(graph -> {
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115 if(procedure instanceof Listener<?>)
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116 graph.asyncRequest(imagerQuery, (Listener<Map<String, ImageDescriptor>>)procedure);
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118 graph.asyncRequest(imagerQuery, procedure);
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125 ImageDescriptor descriptor = content.get(key);
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131 public abstract Map<String, ImageDescriptor> getDescriptors(ReadGraph graph, NodeContext context) throws DatabaseException;
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