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1 /*******************************************************************************\r
2  * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.\r
3  * All rights reserved. This program and the accompanying materials\r
4  * are made available under the terms of the Eclipse Public License v1.0\r
5  * which accompanies this distribution, and is available at\r
6  * http://www.eclipse.org/legal/epl-v10.html\r
7  *\r
8  * Contributors:\r
9  *     VTT Technical Research Centre of Finland - initial API and implementation\r
10  *******************************************************************************/\r
11 package org.simantics.simulation.data;\r
12 \r
13 import org.simantics.databoard.accessor.error.AccessorException;\r
14 import org.simantics.databoard.binding.Binding;\r
15 \r
16 /**\r
17  * A handle to a variable of a {@link Datasource}.\r
18  *\r
19  * @author Toni Kalajainen <toni.kalajainen@vtt.fi>\r
20  */\r
21 public interface VariableHandle {\r
22 \r
23         /**\r
24          * @return key (ID) of the variable\r
25          */\r
26         String key();\r
27 \r
28         /**\r
29          * @return binding for the variable\r
30          */\r
31         Binding binding();\r
32 \r
33         /**\r
34          * @return current value associated with this handle\r
35          * @throws AccessorException if value cannot be retrieved\r
36          */\r
37         Object getValue() throws AccessorException;\r
38 \r
39         /**\r
40          * Frees any resource related to this handle.\r
41          */\r
42         void dispose();\r
43 \r
44 }\r
45 \r