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.db.ReadGraph;
18 import org.simantics.db.RequestProcessor;
19 import org.simantics.db.Session;
20 import org.simantics.db.UndoContext;
21 import org.simantics.db.common.request.ReadRequest;
22 import org.simantics.db.exception.DatabaseException;
23 import org.simantics.db.layer0.variable.Variable;
24 import org.simantics.db.layer0.variable.VariableWrite;
25 import org.simantics.utils.ui.ErrorLogger;
28 * @author Tuukka Lehtonen
30 public class EnumerationVariableModifier implements EnumerationModifier {
32 protected final Session session;
33 protected final UndoContext undoContext;
34 protected final Variable variable;
35 protected final List<String> allowedValues;
36 protected final String defaultValue;
38 private String initialValue;
39 protected Throwable modifierFailed;
41 public EnumerationVariableModifier(RequestProcessor processor, UndoContext undoContext, Variable variable,
42 List<String> allowedValues, String defaultValue) {
43 this.session = processor.getSession();
44 this.undoContext = undoContext;
45 this.variable = variable;
46 this.allowedValues = allowedValues;
47 this.defaultValue = defaultValue;
49 initializeModifier(processor);
52 protected void initializeModifier(RequestProcessor processor) {
54 processor.syncRequest(new ReadRequest() {
56 public void run(ReadGraph graph) throws DatabaseException {
57 initialValue = getInitialValue(graph);
60 } catch (DatabaseException e) {
65 protected void doModify(final String label) {
66 session.asyncRequest(new VariableWrite(variable, label, null, null),
68 if (parameter != null)
69 ErrorLogger.defaultLogError(parameter);
73 protected String getInitialValue(ReadGraph graph) throws DatabaseException {
74 Object value = variable.getValue(graph);
75 return value == null ? defaultValue : value.toString();
79 public String getValue() {
84 public String isValid(String label) {
85 if (modifierFailed != null)
86 return "Could not resolve validator for this value, modification denied. Reason: "
87 + modifierFailed.getMessage();
88 // Validity should already be enforced by the editing UI for
94 public final void modify(String label) {
95 if (modifierFailed != null)
96 // Should never end up here, isValid should prevent it.
97 throw new Error("modifier failed: " + modifierFailed.getMessage());
102 public List<String> getValues() {
103 return allowedValues;