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.db.layer0.variable;
14 import org.simantics.databoard.binding.Binding;
15 import org.simantics.db.WriteGraph;
16 import org.simantics.db.exception.DatabaseException;
19 public interface VariableModifier {
22 * Validates the given string. Returns an error message to display if the
23 * new text is invalid. Returns <code>null</code> if there is no error. Note
24 * that the empty string is not treated the same as <code>null</code>; it
25 * indicates an error state but with no message to display.
27 * @param newText the text to check for validity
28 * @return an error message or <code>null</code> if no error
30 String isValid(Object newValue);
31 String isValid(Object newValue, Binding binding);
32 void modify(WriteGraph graph, Variable variable, Object value) throws DatabaseException;
33 void modify(WriteGraph graph, Variable variable, Object value, Binding binding) throws DatabaseException;