package dalclient;

import java.util.*;


/**
 * SIAP search connection.  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 SiapConnection extends DALConnection {

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

    /* Create a new connection with one service. */
    SiapConnection(String service) {
	super(service);
    }

    /* Get a new empty query context for this connection. */
    public SiapQuery getSiapQuery() {
	SiapQuery query = new SiapQuery(this);
	return (query);
    }

    /* Set up a SIAP context with RA, DEC, SIZE. */
    public SiapQuery getSiapQuery(double ra, double dec, double size) {
	SiapQuery query = new SiapQuery(this);
	String sval;
	Double dval;

	// Encode POS.
	dval = new Double(ra);  sval = dval.toString();  sval += ",";
	dval = new Double(dec); sval += dval.toString();
	query.addParameter("POS", sval);

	// Encode SIZE.
	dval = new Double(size);
	query.addParameter("SIZE", dval.toString());

	return (query);
    }

    /* Set up a SIAP context with RA, DEC, SIZE, FORMAT. */
    public SiapQuery getSiapQuery(double ra, double dec,
	    double size, String format) {

	SiapQuery query = new SiapQuery(this);
	String sval;
	Double dval;

	// Encode POS.
	dval = new Double(ra);  sval = dval.toString();  sval += ",";
	dval = new Double(dec); sval += dval.toString();
	query.addParameter("POS", sval);

	// Encode SIZE.
	dval = new Double(size);  sval = dval.toString();
	query.addParameter("SIZE", sval);

	// Encode FORMAT.
	query.addParameter("FORMAT", format);

	return (query);
    }

    /* Set up a SIAP context with RA, DEC, RA_SIZE, DEC_SIZE. */
    public SiapQuery getSiapQuery(double ra, double dec,
	    double ra_size,  double dec_size) {

	SiapQuery query = new SiapQuery(this);
	String sval, s1, s2;
	Double dval;

	// Encode POS.
	dval = new Double(ra);  sval = dval.toString();  sval += ",";
	dval = new Double(dec); sval += dval.toString();
	query.addParameter("POS", sval);

	// Encode SIZE.  Collapse to one value if two values are equal.
	dval = new Double(ra_size);  s1 = dval.toString();
	dval = new Double(dec_size); s2 = dval.toString();
	if (s1.equals(s2))
	    query.addParameter("SIZE", s1);
	else
	    query.addParameter("SIZE", s1 + "," + s2);

	return (query);
    }

    /* Set up a SIAP context with RA, DEC, RA_SIZE, DEC_SIZE, FORMAT. */
    public SiapQuery getSiapQuery(double ra, double dec,
	    double ra_size,  double dec_size, String format) {

	SiapQuery query = new SiapQuery(this);
	String sval, s1, s2;
	Double dval;

	// Encode POS.
	dval = new Double(ra);  sval = dval.toString();  sval += ",";
	dval = new Double(dec); sval += dval.toString();
	query.addParameter("POS", sval);

	// Encode SIZE.  Collapse to one value if two values are equal.
	dval = new Double(ra_size);  s1 = dval.toString();
	dval = new Double(dec_size); s2 = dval.toString();
	if (s1.equals(s2))
	    query.addParameter("SIZE", s1);
	else
	    query.addParameter("SIZE", s1 + "," + s2);

	// Encode FORMAT.
	query.addParameter("FORMAT", format);

	return (query);
    }
}