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 class Negation extends UnaryPredicate {
23 IUnaryPredicate predicate;
25 public Negation(IUnaryPredicate predicate) {
26 this.predicate = predicate;
30 public void add(WriteGraph g, Resource r) throws DatabaseException {
31 predicate.remove(g, r);
35 public Collection<Resource> getResources(ReadGraph g) {
36 throw new UnsupportedOperationException();
40 public boolean has(ReadGraph g, Resource resource) throws DatabaseException {
41 return !predicate.has(g, resource);
45 public void remove(WriteGraph g, Resource r) throws DatabaseException {
50 public boolean supportsAddition() {
51 return predicate.supportsRemoval();
55 public boolean supportsRemoval() {
56 return predicate.supportsAddition();
60 public boolean supportsUnboundedQuery() {
65 public int hashCode() {
68 result = prime * result
69 + ((predicate == null) ? 0 : predicate.hashCode());
74 public boolean equals(Object obj) {
79 if (getClass() != obj.getClass())
81 Negation other = (Negation) obj;
82 if (predicate == null) {
83 if (other.predicate != null)
85 } else if (!predicate.equals(other.predicate))