package dalclient;

import java.util.*;

/**
 * Generic DAL client connection to a service or set of services.
 * At this point the protocol is stateless and a "connection" is nothing
 * more than a list of service URLs.  Queries require a connection context
 * be established first.
 */
public
class DALConnection {
    ArrayList services = new ArrayList();

    /* Default is an empty service list. */
    DALConnection() {
	// Nothing yet.
    }

    /* Create a new connection with one service. */
    DALConnection(String service) {
	services.add(service);
    }

    /* Add a service to an existing connection. */
    public void addService(String service) {
	services.add(service);
    }

    /* Get count of number of services. */
    public int getServiceCount() {
	return (services.size());
    }

    /* Get an individual service URL. */
    public String getServiceURL(int i) {
	return ((String) services.get(i));
    }

    /* Get a new query context for this connection. */
    public DALQuery getDALQuery() {
	return (new DALQuery(this));
    }
}