uk.ac.starlink.table.jdbc
Class TerminalAuthenticator

java.lang.Object
  uk.ac.starlink.table.jdbc.TerminalAuthenticator

All Implemented Interfaces:

JDBCAuthenticator

public class TerminalAuthenticator
extends Object
implements JDBCAuthenticator

Provides JDBC authentication using the terminal; assumes that someone is sitting at System.in.

Constructor Summary

TerminalAuthenticator()
Constructs a new authenticator which uses System.err for prompting.

TerminalAuthenticator(PrintStream promptStrm)
Constructs a new authenticator with a given stream to use for writing prompts.

Method Summary

String[]	authenticate() Obtains username and password.
String	readPassword() Prompts to the prompt stream and reads the password from standard input.
String	readUser() Prompts to the prompt stream and reads the user name from standard input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TerminalAuthenticator

public TerminalAuthenticator(PrintStream promptStrm)

Constructs a new authenticator with a given stream to use for writing prompts.

Parameters:

promptStrm - output stream for prompting

TerminalAuthenticator

public TerminalAuthenticator()

Constructs a new authenticator which uses System.err for prompting.

Method Detail

authenticate

public String[] authenticate()
                      throws IOException

Description copied from interface: JDBCAuthenticator

Obtains username and password. The return value is a two-element array containing the username and password to be used, in that order. Either or both of these may be null.

Specified by:

authenticate in interface JDBCAuthenticator

Returns:

String[]{username,password}

Throws:

IOException - if there is some error

readUser

public String readUser()
                throws IOException

Prompts to the prompt stream and reads the user name from standard input.

Returns:

user name obtained from user

Throws:

IOException

readPassword

public String readPassword()
                    throws IOException

Prompts to the prompt stream and reads the password from standard input.

Returns:

password obtained from user

Throws:

IOException