1 /*******************************************************************************
2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
4 * All rights reserved. This program and the accompanying materials
5 * are made available under the terms of the Eclipse Public License v1.0
6 * which accompanies this distribution, and is available at
7 * http://www.eclipse.org/legal/epl-v10.html
10 * VTT Technical Research Centre of Finland - initial API and implementation
11 *******************************************************************************/
12 package org.simantics.browsing.ui.graph.impl;
14 import java.util.List;
16 import org.simantics.browsing.ui.common.modifiers.EnumerationValue;
17 import org.simantics.browsing.ui.content.Labeler.EnumerationModifier;
18 import org.simantics.databoard.Bindings;
19 import org.simantics.db.ReadGraph;
20 import org.simantics.db.RequestProcessor;
21 import org.simantics.db.Resource;
22 import org.simantics.db.Session;
23 import org.simantics.db.VirtualGraph;
24 import org.simantics.db.WriteGraph;
25 import org.simantics.db.common.request.WriteRequest;
26 import org.simantics.db.exception.DatabaseException;
27 import org.simantics.db.layer0.variable.Variable;
28 import org.simantics.db.request.Read;
29 import org.simantics.utils.ui.ErrorLogger;
32 * @author Tuukka Lehtonen
34 public class EnumerationVariableModifier3 implements EnumerationModifier {
36 protected final Session session;
37 protected final Variable variable;
38 protected final List<String> allowedValues;
39 protected final String defaultValue;
41 protected Throwable modifierFailed;
43 public EnumerationVariableModifier3(RequestProcessor processor, Variable variable, List<String> allowedValues) {
45 this.session = processor.getSession();
46 this.variable = variable;
47 this.allowedValues = allowedValues;
48 this.defaultValue = computeDefaultValue(processor, variable);
49 //System.err.println(this.defaultValue);
53 protected String computeDefaultValue(RequestProcessor processor, final Variable variable) {
55 return processor.syncRequest(new Read<String>() {
57 public String perform(ReadGraph graph) throws DatabaseException {
58 EnumerationValue<Resource> ev = graph.syncRequest(new GetEnumerationValue(variable.getParent(graph).getRepresents(graph)));
60 return ev.getEnumeratedValue().getName();
62 // System.err.println(variable.getURI(graph));
63 return variable.getValue(graph);//variable.getPossiblePropertyValue(graph, Variables.LABEL);
66 } catch (DatabaseException e) {
71 public class Write extends WriteRequest {
73 final private Variable variable;
74 final private String label;
76 public Write(Variable variable, String label) {
77 super((VirtualGraph)null);
78 this.variable = variable;
83 public void perform(WriteGraph graph) throws DatabaseException {
84 variable.setValue(graph, label, Bindings.STRING);
89 protected void doModify(final String label) {
90 session.asyncRequest(new Write(variable, label),
92 if (parameter != null)
93 ErrorLogger.defaultLogError(parameter);
98 public String getValue() {
103 public String isValid(String label) {
104 if (modifierFailed != null)
105 return "Could not resolve validator for this value, modification denied. Reason: "
106 + modifierFailed.getMessage();
107 // Validity should already be enforced by the editing UI for
113 public final void modify(String label) {
114 if (modifierFailed != null)
115 // Should never end up here, isValid should prevent it.
116 throw new Error("modifier failed: " + modifierFailed.getMessage());
121 public List<String> getValues() {
122 return allowedValues;