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.genericrelation;
14 import java.util.List;
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;
23 * Default implementation for some methods of IRelation interface.
25 public abstract class AbstractRelation implements GenericRelation {
28 public boolean isRealizable() {
33 public List<Object[]> realize(ReadGraph g) throws DatabaseException {
34 throw new UnsupportedOperationException();
38 public GenericRelation select(String bindingPattern, Object[] constants) {
39 return new Selection(this, bindingPattern, constants);
43 public GenericRelation selectByRelation(String bindingPattern, GenericRelation constraint) {
44 return new SelectByRelation(this, bindingPattern, constraint);