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Documented difference of RuntimeEnvironmentRequest and Runti...quest2
[simantics/platform.git] / bundles / org.simantics.db.layer0 / src / org / simantics / db / layer0 / genericrelation / AbstractRelation.java
1 /*******************************************************************************
2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
3  * in Industry THTH ry.
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
8  *
9  * Contributors:
10  *     VTT Technical Research Centre of Finland - initial API and implementation
11  *******************************************************************************/
12 package org.simantics.db.layer0.genericrelation;
13
14 import java.util.List;
15
16 import org.simantics.db.ReadGraph;
17 import org.simantics.db.exception.DatabaseException;
18 import org.simantics.db.layer0.adapter.GenericRelation;
19 import org.simantics.db.layer0.genericrelation.combinators.SelectByRelation;
20 import org.simantics.db.layer0.genericrelation.combinators.Selection;
21
22 /**
23  * Default implementation for some methods of IRelation interface.
24  */
25 public abstract class AbstractRelation implements GenericRelation {
26
27         @Override
28         public boolean isRealizable() {
29                 return false;
30         }
31
32         @Override
33         public List<Object[]> realize(ReadGraph g) throws DatabaseException {
34                 throw new UnsupportedOperationException();
35         }
36
37         @Override
38         public GenericRelation select(String bindingPattern, Object[] constants) {
39                 return new Selection(this, bindingPattern, constants);
40         }
41         
42         @Override
43         public GenericRelation selectByRelation(String bindingPattern, GenericRelation constraint) {
44                 return new SelectByRelation(this, bindingPattern, constraint);
45         }
46
47 }