util.java

开发owl的API,提供了W3C规定标准接口,是目前比较少的API.

// The MIT License
//
// Copyright (c) 2004 Evren Sirin
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.

/*
 * Created on Dec 27, 2003
 *
 */
package org.mindswap.owl;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;

import org.mindswap.pellet.ATermUtils;

import aterm.ATermAppl;

import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.ModelFactory;
import com.hp.hpl.jena.rdf.model.Property;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.vocabulary.DAML_OIL;
import com.hp.hpl.jena.vocabulary.RDF;

/**
 * @author Evren Sirin
 *
 */
public class Util {
	private static Model jena = ModelFactory.createDefaultModel();
	
	public static List createList(Resource r) {
		if(r.hasProperty(RDF.first))
			return createList(r, RDF.first, RDF.rest, RDF.nil);
		else if(r.hasProperty(DAML_OIL.first))
			return createList(r, DAML_OIL.first, DAML_OIL.rest, DAML_OIL.nil);
		
		return null;
	}
	
	public static List createList(Resource r, Property listFirst, Property listRest, Resource listNil) {		
		if(r.equals(listNil))
			return new ArrayList();
			
		Resource first = r.getProperty(listFirst).getResource();
		
		Resource rest =  r.getProperty(listRest).getResource();
		
		if(first == null | rest == null)
			return null;
			
		List restList = createList(rest, listFirst, listRest, listNil);
		
		restList.add(0, first);
				
		return restList;
	}

	public static String getLocalName(URI uri) {
		return getLocalName(uri.toString());
	}
	public static String getLocalName(String uri) {
		int index = splitPos(uri);
		
		if(index == -1) return null;
		
		return uri.substring(index + 1);
	}

	public static String getNameSpace(URI uri) {
		return getNameSpace(uri.toString());
	}
	public static String getNameSpace(String uri) {
		int index = uri.indexOf("#");
		
		if(index == -1) return null;
	
		return uri.substring(0, index);
	}

	private static int splitPos(String uri) {
		int pos = uri.indexOf("#");
		
		if(pos == -1) pos = uri.lastIndexOf("/");
		
		return pos; 
	}

	public static URI toURI(String s) {
		try {
			return new URI(s.replaceAll(" ", "%20"));
		} catch (URISyntaxException e) {
			System.out.println("Invalid URI " + e);
			throw new RuntimeException(e);
		}

	}
	
	public static URI toURI(ATermAppl a) {
		return toURI(a.getName());
	}
	
	public static URI toURI(Resource r) {
		return toURI(r.getURI());
	}
	
	public static ATermAppl toATerm(URI uri) {
		return ATermUtils.makeTermAppl(uri.toString());
	}

	public static Property toProperty(URI uri) {
		return jena.createProperty(uri.toString());
	}

	public static Resource toResource(URI uri) {
		return jena.createResource(uri.toString());
	}

	public static Resource toResource(String uri) {
		return jena.createResource(uri);
	}	
	
	public static URI standardURI(URI uri) {
		if(!uri.toString().endsWith("#")) 
			uri = URI.create(uri.toString() + "#");
		
		return uri;
	}
}