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.content.Labeler.EnumerationModifier;
17 import org.simantics.databoard.Bindings;
18 import org.simantics.db.ReadGraph;
19 import org.simantics.db.RequestProcessor;
20 import org.simantics.db.Session;
21 import org.simantics.db.VirtualGraph;
22 import org.simantics.db.WriteGraph;
23 import org.simantics.db.common.request.WriteRequest;
24 import org.simantics.db.exception.DatabaseException;
25 import org.simantics.db.layer0.variable.Variable;
26 import org.simantics.db.request.Read;
27 import org.simantics.utils.ui.ErrorLogger;
30 * @author Tuukka Lehtonen
32 public class EnumerationVariableModifier3 implements EnumerationModifier {
34 protected final Session session;
35 protected final Variable variable;
36 protected final List<String> allowedValues;
37 protected final String defaultValue;
39 protected Throwable modifierFailed;
41 public EnumerationVariableModifier3(RequestProcessor processor, Variable variable, List<String> allowedValues) {
43 this.session = processor.getSession();
44 this.variable = variable;
45 this.allowedValues = allowedValues;
46 this.defaultValue = computeDefaultValue(processor, variable);
47 //System.err.println(this.defaultValue);
51 protected String computeDefaultValue(RequestProcessor processor, final Variable variable) {
53 return processor.syncRequest(new Read<String>() {
55 public String perform(ReadGraph graph) throws DatabaseException {
56 // System.err.println(variable.getURI(graph));
57 return variable.getValue(graph);//variable.getPossiblePropertyValue(graph, Variables.LABEL);
60 } catch (DatabaseException e) {
65 public class Write extends WriteRequest {
67 final private Variable variable;
68 final private String label;
70 public Write(Variable variable, String label) {
71 super((VirtualGraph)null);
72 this.variable = variable;
77 public void perform(WriteGraph graph) throws DatabaseException {
78 variable.setValue(graph, label, Bindings.STRING);
83 protected void doModify(final String label) {
84 session.asyncRequest(new Write(variable, label),
86 if (parameter != null)
87 ErrorLogger.defaultLogError(parameter);
92 public String getValue() {
97 public String isValid(String label) {
98 if (modifierFailed != null)
99 return "Could not resolve validator for this value, modification denied. Reason: "
100 + modifierFailed.getMessage();
101 // Validity should already be enforced by the editing UI for
107 public final void modify(String label) {
108 if (modifierFailed != null)
109 // Should never end up here, isValid should prevent it.
110 throw new Error("modifier failed: " + modifierFailed.getMessage());
115 public List<String> getValues() {
116 return allowedValues;