VIAF.java

package datasets.in;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URL;

import javax.xml.stream.XMLStreamException;

import javat.xml.Document;
import javat.xml.Element;

import org.json.JSONException;
import org.json.JSONObject;
import org.xml.sax.SAXException;

import util.GetRequest;

public class VIAF {

	public static JSONObject getLinks(String viaf) throws IOException, JSONException{
		GetRequest g = new GetRequest("https://viaf.org/viaf/"+viaf+"/justlinks.json");
		String s = g.request();
		return new JSONObject(s);
	}
	
	public static boolean hasEntry(String viaf) throws IOException {
		try{
			new GetRequest("https://viaf.org/viaf/"+viaf+"/justlinks.json").request();
		}catch(FileNotFoundException e){
			return false;
		}
		return true;
	}
	
	public static boolean isDeprecated(String viaf) throws IOException, XMLStreamException, SAXException {
		Document d = Document.load(new URL("http://viaf.org/viaf/"+viaf+"/rdf.xml").openStream());
		for(Element e : d.getRootElement().getChildren("Description")){
			if(! e.getAttribute("about").getValue().equals("http://viaf.org/viaf/"+viaf))
				continue;
			if(e.getChildren("deprecated").size() == 0)
				continue;
			Element d2 = e.getChildren("deprecated").get(0);
			if(d2 == null)
				continue;
			return Boolean.parseBoolean(d2.getText());
		}
		return false;
	}
}