/**
 * 
 */
package de.mpiwg.itgroup.annotationManager.RDFHandling;

import org.apache.log4j.Logger;
import org.restlet.Context;
import org.restlet.engine.component.ChildContext;

import de.mpiwg.itgroup.annotationManager.Errors.TripleStoreStoreError;
import de.mpiwg.itgroup.triplestoremanager.exceptions.TripleStoreHandlerException;
import de.mpiwg.itgroup.triplestoremanager.owl.TripleStoreHandler;

/**
 * @author casties
 *
 */
public class TripleStoreConnection {

    protected static Logger logger = Logger.getRootLogger();
    
    private String user;
    private String password;
    private String url = "jdbc:virtuoso://virtuoso.mpiwg-berlin.mpg.de:1111";

    /**
     * Creates TripleStoreConnection with parameters from web context.
     */
    public TripleStoreConnection() {
        ChildContext context = (ChildContext)Context.getCurrent();
        user = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreUser", true);
        password = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreUserPassword", true);
        url = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreConnectionURL", true, url);        
    }
    
    /**
     * @param user
     * @param password
     * @param url
     */
    public TripleStoreConnection(String user, String password, String url) {
        super();
        this.user = user;
        this.password = password;
        this.url = url;
    }

    /**
     * returns TripleStoreHandler.
     * 
     * @return
     * @throws TripleStoreHandlerException
     */
    public TripleStoreHandler getTripleStoreHandler() throws TripleStoreHandlerException {
        if (user == null || password == null || url == null) {
            logger.error(String.format("Missing triplestore parameters! (user=%s pw=%s url=%s)", user, password, url));
            throw new TripleStoreStoreError();
        }
        TripleStoreHandler th = new TripleStoreHandler(url, user, password);
        return th;
    }
    
    /**
     * returns new TripleStoreHandler.
     * 
     * uses parameters from web context.
     * 
     * @return
     * @throws TripleStoreStoreError
     * @throws TripleStoreHandlerException
     */
    public static TripleStoreHandler newTripleStoreHandler() throws TripleStoreStoreError, TripleStoreHandlerException {
        ChildContext context = (ChildContext)Context.getCurrent();
        String user = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreUser");
        String password = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreUserPassword");
        String url = context.getParameters().getFirstValue("de.mpiwg.itgroup.annotationManager.virtuoso.tripleStoreConnectionURL");
        if (user == null || password == null || url == null) {
            logger.error(String.format("Missing triplestore parameters! (user=%s pw=%s url=%s)", user, password, url));
            throw new TripleStoreStoreError();
        }
        TripleStoreHandler th = new TripleStoreHandler(url, user, password);
        return th;
    }

}