OwlToCycMapping.java

/*
   This file is part of the LarKC platform 
   http://www.larkc.eu/

   Copyright 2010 LarKC project consortium

   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 eu.larkc.core.pluginregistry;

import java.util.Hashtable;

/**
 * This class have hash table which maps the Cyc constants and predicates to
 * OWL, RDF predicates and constants
 * 
 * @author Luka Bradesko, Blaz Fortuna
 * 
 */
public class OwlToCycMapping {

	private Hashtable<String, String> mapping;
	private String SW_OPENCYC_URL = "http://sw.opencyc.org/2009/04/07/concept/en/";

	/**
	 * Constructs the class and fills mappings
	 */
	public OwlToCycMapping() {
		// prepare mappings
		mapping = new Hashtable<String, String>();
		mapping.put("http://www.w3.org/2000/01/rdf-schema#Class", "Collection");
		mapping.put("http://www.w3.org/1999/02/22-rdf-syntax-ns#type", "isa");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#subClassOf", "genls");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#domain", "arg1Isa");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#range", "arg2Isa");
		mapping.put("http://www.w3.org/1999/02/22-rdf-syntax-ns#Property",
				"BinaryPredicate");
		mapping.put("http://www.w3.org/2002/07/owl#TransitiveProperty",
				"TransitiveBinaryPredicate");

		mapping.put("http://www.w3.org/2001/XMLSchema#string",
				"CharacterString");
		mapping.put("http://www.w3.org/2001/XMLSchema#boolean", "TruthValue");
		mapping.put("http://www.w3.org/2001/XMLSchema#float", "SubLRealNumber");
		mapping.put("http://www.w3.org/2001/XMLSchema#int", "SubLInteger");

		mapping.put("http://www.w3.org/2000/01/rdf-schema#isDefinedBy",
				"containsInformationAbout");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#label",
				"prettyString");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#comment", "comment");
		mapping.put("http://www.w3.org/2000/01/rdf-schema#Resource", "Thing");

		// the mapping to those two is missing in the rdf
		// mapping.put("http://larkc.eu/plugin#genlrange", "arg2Genl");
		// mapping.put("http://larkc.eu/plugin#genldomain", "arg1Genl");
	}

	/**
	 * Checking if Cyc equivalent for the term exists
	 * 
	 * @param rdfTerm
	 * @return true/false about the existance
	 */
	public boolean isCycEquivalent(String rdfTerm) {
		if (mapping.containsKey(rdfTerm))
			return true;

		return rdfTerm.startsWith(SW_OPENCYC_URL);
	}

	/**
	 * Returns the cyc equivalent term
	 * 
	 * @param rdfTerm
	 * @return cyc equivalent
	 */
	public String getCycEquivalent(String rdfTerm) {
		if (mapping.containsKey(rdfTerm)) {
			return mapping.get(rdfTerm);
		} else if (rdfTerm.startsWith(SW_OPENCYC_URL)) {
			return rdfTerm.substring(SW_OPENCYC_URL.length());
		}

		return null;
	}

	/**
	 * change the string representation of term to the valid cyc constant
	 * 
	 * @param rdfTerm
	 * @return cyc constant
	 */
	public String toCycConst(String rdfTerm) {
		// first we make the string pretty for known name-spaces
		rdfTerm = rdfTerm.replaceFirst("http://larkc.eu/plugin#", "larkc-");
		rdfTerm = rdfTerm.replaceFirst("http://www.wsmo.org/ns/wsmo-lite#",
				"wsl-");
		// make it pretty if still necessary
		final int len = rdfTerm.length();
		StringBuffer cycConst = new StringBuffer();
		for (int chN = 0; chN < len; chN++) {
			char ch = rdfTerm.charAt(chN);
			if (Character.isLetter(ch)) {
				cycConst.append(ch);
			} else if (Character.isDigit(ch)) {
				cycConst.append(ch);
			} else if (ch == ':' || ch == '-' || ch == '_') {
				cycConst.append(ch);
			} else {
				cycConst.append('-');
			}
		}
		return cycConst.toString();
	}

}