Connection.java

package org.postgresql;

import java.io.*;
import java.net.*;
import java.sql.*;
import java.util.*;
import org.postgresql.Field;
import org.postgresql.fastpath.*;
import org.postgresql.largeobject.*;
import org.postgresql.util.*;
import org.postgresql.core.*;

/**
 * $Id: Connection.java,v 1.34 2001/11/01 01:08:36 barry Exp $
 *
 * This abstract class is used by org.postgresql.Driver to open either the JDBC1 or
 * JDBC2 versions of the Connection class.
 *
 */
public abstract class Connection
{
	// This is the network stream associated with this connection
	public PG_Stream pg_stream;

	private String PG_HOST;
	private int PG_PORT;
	private String PG_USER;
	private String PG_PASSWORD;
	private String PG_DATABASE;
	private boolean PG_STATUS;
	private String compatible;

	/**
	 *	The encoding to use for this connection.
	 */
	private Encoding encoding = Encoding.defaultEncoding();

	private String dbVersionNumber;

	public boolean CONNECTION_OK = true;
	public boolean CONNECTION_BAD = false;

	public boolean autoCommit = true;
	public boolean readOnly = false;

	public Driver this_driver;
	private String this_url;
	private String cursor = null;	// The positioned update cursor name

	// These are new for v6.3, they determine the current protocol versions
	// supported by this version of the driver. They are defined in
	// src/include/libpq/pqcomm.h
	protected static final int PG_PROTOCOL_LATEST_MAJOR = 2;
	protected static final int PG_PROTOCOL_LATEST_MINOR = 0;
	private static final int SM_DATABASE	= 64;
	private static final int SM_USER	= 32;
	private static final int SM_OPTIONS = 64;
	private static final int SM_UNUSED	= 64;
	private static final int SM_TTY = 64;

	private static final int AUTH_REQ_OK = 0;
	private static final int AUTH_REQ_KRB4 = 1;
	private static final int AUTH_REQ_KRB5 = 2;
	private static final int AUTH_REQ_PASSWORD = 3;
	private static final int AUTH_REQ_CRYPT = 4;

	// New for 6.3, salt value for crypt authorisation
	private String salt;

	// These are used to cache oids, PGTypes and SQLTypes