jmri
Class AbstractReporterManager

java.lang.Object
  jmri.AbstractManager
      jmri.AbstractReporterManager

All Implemented Interfaces:

PropertyChangeListener, EventListener, Manager, ReporterManager

Direct Known Subclasses:

LnReporterManager

public abstract class AbstractReporterManager
extends AbstractManager
implements ReporterManager

Abstract partial implementation of a ReporterManager.

Author:

Bob Jacobsen Copyright (C) 2004

Field Summary

Fields inherited from class jmri.AbstractManager

_tsys, _tuser

Constructor Summary

AbstractReporterManager()

Method Summary

protected abstract Reporter	createNewReporter(String systemName, String userName) Internal method to invoke the factory, after all the logic for returning an existing method has been invoked.
Reporter	getBySystemName(String key) Locate an instance based on a system name.
Reporter	getByUserName(String key) Locate an instance based on a user name.
Reporter	getReporter(String name) Locate via user name, then system name if needed.
Reporter	newReporter(String sysName, String userName) Return an instance with the specified system and user names.
Reporter	provideReporter(String name) Locate via user name, then system name if needed.
char	typeLetter()

Methods inherited from class jmri.AbstractManager

addPropertyChangeListener, deregister, dispose, firePropertyChange, getInstanceBySystemName, getInstanceByUserName, getSystemNameList, makeSystemName, propertyChange, register, removePropertyChangeListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface jmri.ReporterManager

getSystemNameList

Methods inherited from interface jmri.Manager

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

Constructor Detail

AbstractReporterManager

public AbstractReporterManager()

Method Detail

typeLetter

public char typeLetter()

Specified by:

typeLetter in interface Manager

Returns:

The type letter for a specific implementation

provideReporter

public Reporter provideReporter(String name)

Description copied from interface: ReporterManager

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

Specified by:

provideReporter in interface ReporterManager

Returns:

Never null under normal circumstances

getReporter

public Reporter getReporter(String name)

Description copied from interface: ReporterManager

Locate via user name, then system name if needed. If that fails, return null

Specified by:

getReporter in interface ReporterManager

Returns:

null if no match found

getBySystemName

public Reporter getBySystemName(String key)

Description copied from interface: ReporterManager

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

Specified by:

getBySystemName in interface ReporterManager

Returns:

requested Reporter object or null if none exists

getByUserName

public Reporter getByUserName(String key)

Description copied from interface: ReporterManager

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

Specified by:

getByUserName in interface ReporterManager

Returns:

requested Reporter object or null if none exists

newReporter

public Reporter newReporter(String sysName,
                            String userName)

Description copied from interface: ReporterManager

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 Reporter object representing a given physical Reporter and therefore only one with a specific system or user name.

This will always return a valid object reference; 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 Reporter object created; a valid system name must be provided
• If both names are provided, the system name defines the hardware access of the desired Reporter, and the user address is associated with it. The system name must be valid.

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 Reporters when you should be looking them up.

Specified by:

newReporter in interface ReporterManager

Returns:

requested Reporter object (never null)

createNewReporter

protected abstract Reporter createNewReporter(String systemName,
                                              String userName)

Internal method to invoke the factory, after all the logic for returning an existing method has been invoked.

Returns:

never null