jmri.managers
Class ProxyTurnoutManager

java.lang.Object
  jmri.managers.AbstractProxyManager
      jmri.managers.ProxyTurnoutManager

All Implemented Interfaces:

Manager, TurnoutManager

public class ProxyTurnoutManager
extends AbstractProxyManager
implements TurnoutManager

Implementation of a TurnoutManager that can serves as a proxy for multiple system-specific implementations. The first to be added is the "Primary".

Author:

Bob Jacobsen Copyright (C) 2003

Constructor Summary

ProxyTurnoutManager()

Method Summary

void	addManager(Manager m) Revise superclass behavior: Added managers mean that the default internal manager is not the primary.
int	askControlType(String sysName) Get from the user, the type of output to be used bits to control a turnout.
int	askNumControlBits(String sysName) Get from the user, the number of addressed bits used to control a turnout.
Turnout	getBySystemName(String systemName) Locate an instance based on a system name.
Turnout	getByUserName(String userName) Locate an instance based on a user name.
String	getClosedText() Get text to be used for the Turnout.CLOSED state in user communication.
String	getThrownText() Get text to be used for the Turnout.THROWN state in user communication.
Turnout	getTurnout(String name) Locate via user name, then system name if needed.
String[]	getValidOperationTypes() TurnoutOperation support.
Turnout	newTurnout(String sysName, String userName) Return an instance with the specified system and user names.
Turnout	provideTurnout(String name) Locate via user name, then system name if needed.

Methods inherited from class jmri.managers.AbstractProxyManager

addPropertyChangeListener, deregister, dispose, getSystemNameList, makeSystemName, register, removePropertyChangeListener, systemLetter, typeLetter

Methods inherited from class java.lang.Object

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

Methods inherited from interface jmri.TurnoutManager

getSystemNameList

Methods inherited from interface jmri.Manager

addPropertyChangeListener, deregister, dispose, makeSystemName, register, removePropertyChangeListener, systemLetter, typeLetter

Constructor Detail

ProxyTurnoutManager

public ProxyTurnoutManager()

Method Detail

addManager

public void addManager(Manager m)

Revise superclass behavior: Added managers mean that the default internal manager is not the primary. Also support TurnoutOperations

Overrides:

addManager in class AbstractProxyManager

getTurnout

public Turnout getTurnout(String name)

Locate via user name, then system name if needed.

Specified by:

getTurnout in interface TurnoutManager

Parameters:

name -

Returns:

Null if nothing by that name exists

provideTurnout

public Turnout provideTurnout(String name)

Description copied from interface: TurnoutManager

Locate via user name, then system name if needed. If that fails, create a new turnout. If the name is a valid system name, it will be used for the new turnout. Otherwise, the makeSystemName method will attempt to turn it into a valid system name.

Specified by:

provideTurnout in interface TurnoutManager

Returns:

Never null under normal circumstances

getBySystemName

public Turnout getBySystemName(String systemName)

Locate an instance based on a system name. Returns null if no instance already exists.

Specified by:

getBySystemName in interface TurnoutManager

Returns:

requested Turnout object or null if none exists

getByUserName

public Turnout getByUserName(String userName)

Locate an instance based on a user name. Returns null if no instance already exists.

Specified by:

getByUserName in interface TurnoutManager

Returns:

requested Turnout object or null if none exists

newTurnout

public Turnout newTurnout(String sysName,
                          String userName)

Return an instance with the specified system and user names. Note that two calls with the same arguments will get the same instance; there is only one Sensor object representing a given physical turnout and therefore only one with a specific system or user name.

This will always return a valid object reference for a valid request; a new object will be created if necessary. In that case:

• If a null reference is given for user name, no user name will be associated with the Turnout object created; a valid system name must be provided
• If a null reference is given for the system name, a system name will _somehow_ be inferred from the user name. How this is done is system specific. Note: a future extension of this interface will add an exception to signal that this was not possible.
• If both names are provided, the system name defines the hardware access of the desired turnout, and the user address is associated with it.

Note that it is possible to make an inconsistent request if both addresses are provided, but the given values are associated with different objects. This is a problem, and we don't have a good solution except to issue warnings. This will mostly happen if you're creating Sensors when you should be looking them up.

Specified by:

newTurnout in interface TurnoutManager

Returns:

requested Sensor object (never null)

getClosedText

public String getClosedText()

Get text to be used for the Turnout.CLOSED state in user communication. Allows text other than "CLOSED" to be use with certain hardware system to represent the Turnout.CLOSED state. Defaults to the primary manager. This means that the primary manager sets the terminology used. Note: the primary manager need not override the method in AbstractTurnoutManager if "CLOSED" is the desired terminology.

Specified by:

getClosedText in interface TurnoutManager

getThrownText

public String getThrownText()

Get text to be used for the Turnout.THROWN state in user communication. Allows text other than "THROWN" to be use with certain hardware system to represent the Turnout.THROWN state. Defaults to the primary manager. This means that the primary manager sets the terminology used. Note: the primary manager need not override the method in AbstractTurnoutManager if "THROWN" is the desired terminology.

Specified by:

getThrownText in interface TurnoutManager

askNumControlBits

public int askNumControlBits(String sysName)

Get from the user, the number of addressed bits used to control a turnout. Normally this is 1, and the default routine returns 1 automatically. Turnout Managers for systems that can handle multiple control bits should override this method with one which asks the user to specify the number of control bits. If the user specifies more than one control bit, this method should check if the additional bits are available (not assigned to another object). If the bits are not available, this method should return 0 for number of control bits, after informing the user of the problem.

Specified by:

askNumControlBits in interface TurnoutManager

askControlType

public int askControlType(String sysName)

Get from the user, the type of output to be used bits to control a turnout. Normally this is 0 for 'steady state' control, and the default routine returns 0 automatically. Turnout Managers for systems that can handle pulsed control as well as steady state control should override this method with one which asks the user to specify the type of control to be used. The routine should return 0 for 'steady state' control, or n for 'pulsed' control, where n specifies the duration of the pulse (normally in seconds).

Specified by:

askControlType in interface TurnoutManager

getValidOperationTypes

public String[] getValidOperationTypes()

TurnoutOperation support. Return a list which is just the concatenation of all the valid operation types

Specified by:

getValidOperationTypes in interface TurnoutManager