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;
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14 import java.util.ArrayList;
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15 import java.util.Collections;
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16 import java.util.HashSet;
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17 import java.util.List;
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18 import java.util.Set;
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20 import org.simantics.browsing.ui.content.Labeler.EnumerationModifier;
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21 import org.simantics.databoard.Bindings;
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22 import org.simantics.db.ReadGraph;
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23 import org.simantics.db.RequestProcessor;
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24 import org.simantics.db.Resource;
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25 import org.simantics.db.Session;
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26 import org.simantics.db.UndoContext;
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27 import org.simantics.db.VirtualGraph;
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28 import org.simantics.db.WriteGraph;
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29 import org.simantics.db.common.request.ObjectsWithType;
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30 import org.simantics.db.common.request.WriteRequest;
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31 import org.simantics.db.exception.DatabaseException;
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32 import org.simantics.db.layer0.variable.Variable;
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33 import org.simantics.db.layer0.variable.Variables;
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34 import org.simantics.db.request.Read;
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35 import org.simantics.layer0.Layer0;
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36 import org.simantics.utils.datastructures.Callback;
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37 import org.simantics.utils.ui.ErrorLogger;
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40 * @author Tuukka Lehtonen
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42 public class EnumerationVariableModifier2 implements EnumerationModifier {
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44 protected final Session session;
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45 protected final UndoContext undoContext;
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46 protected final Variable variable;
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47 protected final Set<String> allowedValues;
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48 protected final String defaultValue;
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50 protected Throwable modifierFailed;
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52 public EnumerationVariableModifier2(RequestProcessor processor, UndoContext undoContext, Variable variable) {
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54 this.session = processor.getSession();
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55 this.undoContext = undoContext;
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56 this.variable = variable;
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57 this.allowedValues = computeAllowedValues(processor, variable);
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58 this.defaultValue = computeDefaultValue(processor, variable);
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62 protected String computeDefaultValue(RequestProcessor processor, final Variable variable) {
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64 return processor.syncRequest(new Read<String>() {
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66 public String perform(ReadGraph graph) throws DatabaseException {
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67 return variable.getPossiblePropertyValue(graph, Variables.LABEL);
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70 } catch (DatabaseException e) {
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75 protected Set<String> computeAllowedValues(RequestProcessor processor, final Variable variable) {
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77 return processor.syncRequest(new Read<Set<String>>() {
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79 public Set<String> perform(ReadGraph graph) throws DatabaseException {
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81 Layer0 L0 = Layer0.getInstance(graph);
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82 Set<String> result = new HashSet<String>();
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83 Resource literal = variable.getPossibleRepresents(graph);
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84 Resource type = graph.getSingleObject(literal, L0.PartOf);
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85 for(Resource lit : graph.syncRequest(new ObjectsWithType(type, L0.ConsistsOf, type))) {
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86 String label = graph.getPossibleRelatedValue(lit, L0.HasLabel);
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87 if(label == null) label = graph.getRelatedValue(lit, L0.HasName);
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94 } catch (DatabaseException e) {
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95 return Collections.emptySet();
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99 public class Write extends WriteRequest {
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101 final private Variable variable;
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102 final private String label;
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104 public Write(Variable variable, String label) {
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105 super((VirtualGraph)null);
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106 this.variable = variable;
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107 this.label = label;
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111 public void perform(WriteGraph graph) throws DatabaseException {
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112 variable.setValue(graph, label, Bindings.STRING);
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117 protected void doModify(final String label) {
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118 session.asyncRequest(new Write(variable, label),
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119 new Callback<DatabaseException>() {
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121 public void run(DatabaseException parameter) {
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122 if (parameter != null)
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123 ErrorLogger.defaultLogError(parameter);
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129 public String getValue() {
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130 return defaultValue;
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134 public String isValid(String label) {
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135 if (modifierFailed != null)
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136 return "Could not resolve validator for this value, modification denied. Reason: "
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137 + modifierFailed.getMessage();
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138 // Validity should already be enforced by the editing UI for
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144 public final void modify(String label) {
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145 if (modifierFailed != null)
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146 // Should never end up here, isValid should prevent it.
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147 throw new Error("modifier failed: " + modifierFailed.getMessage());
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152 public List<String> getValues() {
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153 ArrayList<String> result = new ArrayList<String>();
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154 result.addAll(allowedValues);
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