1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.db.impl.graph;
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14 import org.simantics.db.Resource;
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15 import org.simantics.db.Statement;
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16 import org.simantics.db.impl.ResourceImpl;
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17 import org.simantics.db.impl.support.ResourceSupport;
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19 public final class InternalStatement implements Statement, Comparable<Statement> {
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21 final ResourceSupport support;
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26 public InternalStatement(ResourceSupport support, final int s, final int p, final int o) {
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27 this.support = support;
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34 public Resource getSubject() {
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35 return new ResourceImpl(support, s);
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39 public Resource getPredicate() {
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40 return new ResourceImpl(support, p);
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44 public Resource getObject() {
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45 return new ResourceImpl(support, o);
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49 public boolean isAsserted(Resource subject) {
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50 return ((ResourceImpl)subject).id != s;
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54 final public int hashCode() {
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55 return 41 * ( 31 * s + p) + o;
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58 final private int id(Resource r) {
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59 return ((ResourceImpl)r).id;
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63 public boolean equals(Object object) {
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66 else if (object == null)
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68 else if (!(object instanceof Statement))
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70 Statement r = (Statement)object;
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71 return s == id(r.getSubject()) && p == id(r.getPredicate()) && o== id(r.getObject());
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75 public int compareTo(Statement other) {
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76 int result = compare(s,id(other.getSubject()));
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77 if(result != 0) return result;
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78 result = compare(p,id(other.getPredicate()));
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79 if(result != 0) return result;
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80 return compare(o,id(other.getObject()));
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83 private int compare(int x, int y) {
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84 return (x < y) ? -1 : ((x == y) ? 0 : 1);
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