001/** 002 * Copyright (C) 2007 - 2016, Jens Lehmann 003 * 004 * This file is part of DL-Learner. 005 * 006 * DL-Learner is free software; you can redistribute it and/or modify 007 * it under the terms of the GNU General Public License as published by 008 * the Free Software Foundation; either version 3 of the License, or 009 * (at your option) any later version. 010 * 011 * DL-Learner is distributed in the hope that it will be useful, 012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 014 * GNU General Public License for more details. 015 * 016 * You should have received a copy of the GNU General Public License 017 * along with this program. If not, see <http://www.gnu.org/licenses/>. 018 */ 019package org.dllearner.utilities.owl; 020 021import org.dllearner.utilities.StringFormatter; 022import org.semanticweb.owlapi.apibinding.OWLManager; 023import org.semanticweb.owlapi.formats.RDFXMLDocumentFormat; 024import org.semanticweb.owlapi.formats.TurtleDocumentFormat; 025import org.semanticweb.owlapi.model.*; 026import org.semanticweb.owlapi.owlxml.renderer.OWLXMLObjectRenderer; 027import org.semanticweb.owlapi.owlxml.renderer.OWLXMLWriter; 028 029import java.io.ByteArrayOutputStream; 030import java.io.StringWriter; 031import java.io.UnsupportedEncodingException; 032 033/** 034 * A collection of various render methods provided by 035 * OWL API. 036 * 037 * @author Jens Lehmann 038 * 039 */ 040public class OWLAPIRenderers { 041 042 private static final ManchesterOWLSyntaxOWLObjectRendererImplExt manchesterRenderer = new ManchesterOWLSyntaxOWLObjectRendererImplExt(); 043 private static final DLSyntaxObjectRendererExt dlSyntaxRenderer = new DLSyntaxObjectRendererExt(); 044 045 static { 046 manchesterRenderer.setUseWrapping(false); 047 manchesterRenderer.setUseTabbing(false); 048 } 049 050 /** 051 * Converts an OWL API object to a DL syntax string. 052 * 053 * @param owlObject input OWL API object 054 * @return Manchester OWL syntax string. 055 */ 056 public static String toDLSyntax(OWLObject owlObject) { 057 return dlSyntaxRenderer.render(owlObject); 058 } 059 060 /** 061 * Converts an OWL API axiom to a Manchester OWL syntax string. 062 * 063 * @param axiom input OWL axiom 064 * @return Manchester OWL syntax string. 065 */ 066 public static String toManchesterOWLSyntax(OWLAxiom axiom) { 067 return manchesterRenderer.render(axiom); 068 } 069 070 /** 071 * Converts an OWL API OWLClassExpression to a Manchester OWL syntax string. 072 * 073 * @param ce input OWL class expression 074 * @return Manchester OWL syntax string. 075 */ 076 public static String toManchesterOWLSyntax(OWLClassExpression ce) { 077 return manchesterRenderer.render(ce); 078 } 079 080 /** 081 * Converts an OWL API object to an OWL/XML syntax string. 082 * 083 * @param obj Input OWL object. 084 * @return OWL/XML syntax string. 085 */ 086 public static String toOWLXMLSyntax(OWLObject obj) { 087 StringWriter sw = new StringWriter(); 088 try { 089 OWLXMLWriter oxw = new OWLXMLWriter(sw, OWLManager.createOWLOntologyManager().createOntology(IRI.create("http://example.com/"))); 090 OWLXMLObjectRenderer renderer = new OWLXMLObjectRenderer(oxw); 091 obj.accept(renderer); 092 } catch (OWLOntologyCreationException e) { 093 e.printStackTrace(); 094 } 095 return sw.toString(); 096 } 097 098 public static String toRDFXMLSyntax(OWLAxiom axiom) { 099 ByteArrayOutputStream out = new ByteArrayOutputStream(); 100 String str = ""; 101 try { 102 OWLOntologyManager manager = OWLManager.createOWLOntologyManager(); 103 OWLOntology ontology = manager.createOntology(IRI.create("http://example.com/")); 104 manager.applyChange(new AddAxiom(ontology, axiom)); 105 manager.saveOntology(ontology, new RDFXMLDocumentFormat(), out); 106 str = new String(out.toByteArray(), "UTF-8"); 107 } catch (OWLOntologyCreationException | OWLOntologyStorageException | UnsupportedEncodingException e) { 108 e.printStackTrace(); 109 } 110 return str; 111 } 112 113 public static String toTurtleSyntax(OWLAxiom axiom, boolean shortVersion) { 114 ByteArrayOutputStream out = new ByteArrayOutputStream(); 115 String str = ""; 116 try { 117 OWLOntologyManager manager = OWLManager.createOWLOntologyManager(); 118 OWLOntology ontology = manager.createOntology(IRI.create("http://example.com/")); 119 manager.applyChange(new AddAxiom(ontology, axiom)); 120 manager.saveOntology(ontology, new TurtleDocumentFormat(), out); 121 str = new String(out.toByteArray(), "UTF-8"); 122 } catch (OWLOntologyCreationException | UnsupportedEncodingException | OWLOntologyStorageException e) { 123 e.printStackTrace(); 124 } 125 if(shortVersion) { 126 String[] lines = str.split("\n"); 127 String shortStr = ""; 128 for(String line : lines) { 129 if(!line.startsWith("@prefix") && 130 !line.startsWith("@base") && 131 !line.startsWith("#") && 132 !line.startsWith("<http://example.com/>") && 133 !(StringFormatter.isWhitespace(line))) { 134 shortStr += line + "\n"; 135 } 136 } 137 return shortStr; 138 } 139 140 return str; 141 } 142 143}