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.common.request;
14 import org.simantics.db.ReadGraph;
15 import org.simantics.db.Resource;
16 import org.simantics.db.exception.DatabaseException;
18 abstract public class ResourceRead2<T> extends ResourceReadBase<T> {
20 final protected Resource resource;
21 final protected Resource resource2;
24 public int hashCode() {
25 return resource.hashCode() + 31 * resource2.hashCode();
29 public boolean equals(Object object) {
32 else if (object == null)
34 else if (getClass() != object.getClass())
36 ResourceRead2<?> r = (ResourceRead2<?>)object;
37 return resource.equals(r.resource) && resource2.equals(r.resource2);
40 public ResourceRead2(Resource resource, Resource resource2) {
41 if(resource == null) throw new IllegalArgumentException("Null resource.");
42 if(resource2 == null) throw new IllegalArgumentException("Null resource2.");
43 this.resource = resource;
44 this.resource2 = resource2;
48 public boolean isImmutable(ReadGraph graph) throws DatabaseException {
49 return graph.isImmutable(resource) && graph.isImmutable(resource2);
54 public String toString() {
55 return getClass().getSimpleName() + "|" + resource + "|" + resource2;