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/*
* This file is part of the OWL API.
*
* The contents of this file are subject to the LGPL License, Version 3.0.
*
* Copyright (C) 2011, The University of Manchester
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*
*
* Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0
* in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
*
* Copyright 2011, University of Manchester
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.semanticweb.owlapi.io;
import static org.semanticweb.owlapi.vocab.OWLRDFVocabulary.*;
import java.io.Serializable;
import java.util.Arrays;
import java.util.List;
import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.model.OWLLiteral;
import org.semanticweb.owlapi.vocab.OWLRDFVocabulary;
import gnu.trove.map.hash.THashMap;
/**
* @author Matthew Horridge, The University of Manchester, Bio-Health
* Informatics Group, Date: 21/12/2010
* @since 3.2
*/
public class RDFTriple implements Serializable, Comparable {
private static final long serialVersionUID = 30406L;
private final RDFResource subject;
private final RDFResource predicate;
private final RDFNode object;
/**
* @param subject
* the subject
* @param predicate
* the predicate
* @param object
* the object
*/
public RDFTriple(RDFResource subject, RDFResource predicate, RDFNode object) {
this.subject = subject;
this.predicate = predicate;
this.object = object;
}
/**
* @param subject
* the subject
* @param subjectAnon
* whether the subject is anonymous
* @param predicate
* the predicate
* @param predicateAnon
* whether the predicate is anon
* @param object
* the object
* @param objectAnon
* whether the object is anonymous
*/
public RDFTriple(IRI subject, boolean subjectAnon, IRI predicate,
boolean predicateAnon, IRI object, boolean objectAnon) {
this.subject = new RDFResource(subject, subjectAnon);
this.predicate = new RDFResource(predicate, predicateAnon);
this.object = new RDFResource(object, objectAnon);
}
/**
* @param subject
* the subject
* @param subjectAnon
* whether the subject is anonymous
* @param predicate
* the predicate
* @param predicateAnon
* whether the predicate is anon
* @param object
* the object
*/
public RDFTriple(IRI subject, boolean subjectAnon, IRI predicate,
boolean predicateAnon, OWLLiteral object) {
this.subject = new RDFResource(subject, subjectAnon);
this.predicate = new RDFResource(predicate, predicateAnon);
this.object = new RDFLiteral(object);
}
/**
* @return the subject
*/
public RDFResource getSubject() {
return subject;
}
/**
* @return the predicate
*/
public RDFResource getPredicate() {
return predicate;
}
/**
* @return the object
*/
public RDFNode getObject() {
return object;
}
@Override
public int hashCode() {
return subject.hashCode() * 37 + predicate.hashCode() * 17
+ object.hashCode();
}
@Override
public boolean equals(Object o) {
if (o == this) {
return true;
}
if (!(o instanceof RDFTriple)) {
return false;
}
RDFTriple other = (RDFTriple) o;
return subject.equals(other.subject)
&& predicate.equals(other.predicate)
&& object.equals(other.object);
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append(subject.toString());
sb.append(" ");
sb.append(predicate.toString());
sb.append(" ");
sb.append(object.toString());
sb.append(".");
return sb.toString();
}
private static final List ORDERED_URIS = Arrays.asList(
RDF_TYPE.getIRI(),
RDFS_LABEL.getIRI(),
OWL_DEPRECATED.getIRI(),
RDFS_COMMENT.getIRI(),
RDFS_IS_DEFINED_BY.getIRI(),
RDF_FIRST.getIRI(),
RDF_REST.getIRI(),
OWL_EQUIVALENT_CLASS.getIRI(),
OWL_EQUIVALENT_PROPERTY.getIRI(),
RDFS_SUBCLASS_OF.getIRI(),
RDFS_SUB_PROPERTY_OF.getIRI(),
RDFS_DOMAIN.getIRI(),
RDFS_RANGE.getIRI(),
OWL_DISJOINT_WITH.getIRI(),
OWL_ON_PROPERTY.getIRI(),
OWL_DATA_RANGE.getIRI(),
OWL_ON_CLASS.getIRI(),
OWL_ANNOTATED_SOURCE.getIRI(),
OWL_ANNOTATED_PROPERTY.getIRI(),
OWL_ANNOTATED_TARGET.getIRI());
static final THashMap specialPredicateRanks = new THashMap();
static {
int nextId = 1;
for (int i = 0; i < ORDERED_URIS.size(); i++) {
specialPredicateRanks.put(ORDERED_URIS.get(i), nextId++);
}
for (OWLRDFVocabulary vocabulary : OWLRDFVocabulary.values()) {
IRI iri = vocabulary.getIRI();
if (!specialPredicateRanks.containsKey(iri)) {
specialPredicateRanks.put(iri, nextId++);
}
}
}
@Override
public int compareTo(RDFTriple o) {
// compare by predicate, then subject, then object
int diff = comparePredicates(predicate, o.predicate);
if (diff == 0) {
diff = subject.compareTo(o.subject);
}
if (diff == 0) {
diff = object.compareTo(o.object);
}
return diff;
}
private static int comparePredicates(RDFResource predicate, RDFResource otherPredicate) {
IRI predicateIRI = predicate.getResource();
Integer specialPredicateRank = specialPredicateRanks.get(predicateIRI);
IRI otherPredicateIRI = otherPredicate.getResource();
Integer otherSpecialPredicateRank = specialPredicateRanks.get(otherPredicateIRI);
if (specialPredicateRank != null) {
if (otherSpecialPredicateRank != null) {
return specialPredicateRank - otherSpecialPredicateRank;
} else {
return -1;
}
} else {
if (otherSpecialPredicateRank != null) {
return +1;
} else {
return predicateIRI.compareTo(otherPredicateIRI);
}
}
}
}
