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.layer0.utils.predicates;
14 import java.util.Collection;
16 import org.simantics.db.Resource;
17 import org.simantics.db.ReadGraph;
18 import org.simantics.db.WriteGraph;
19 import org.simantics.db.exception.DatabaseException;
21 public interface IUnaryPredicate {
23 boolean supportsUnboundedQuery();
25 Collection<Resource> getResources(ReadGraph g) throws DatabaseException;
26 boolean has(ReadGraph g, Resource resource) throws DatabaseException;
28 boolean supportsAddition();
29 boolean supportsRemoval();
31 void add(WriteGraph g, Resource r) throws DatabaseException;
32 void remove(WriteGraph g, Resource r) throws DatabaseException;