Package jmri

Interface LightManager

All Superinterfaces:
Manager<Light>, PropertyChangeProvider, ProvidingManager<Light>, SilenceablePropertyChangeProvider, VetoableChangeProvider
All Known Implementing Classes:
AbstractLightManager, AcelaLightManager, CbusLightManager, DCCppLightManager, InternalLightManager, IpocsLightManager, JMRIClientLightManager, LnLightManager, MqttLightManager, NceLightManager, OlcbLightManager, ProxyLightManager, SerialLightManager, SerialLightManager, SerialLightManager, SerialLightManager, SerialLightManager, SerialLightManager, SpecificLightManager, SpecificLightManager, SpecificLightManager, SpecificLightManager, UsbLightManager, XBeeLightManager, XNetLightManager

public interface LightManager
extends ProvidingManager<Light>
Interface for obtaining Lights.

This doesn't have a "new" method, as Lights are separately implemented, instead of being system-specific.

Based on SignalHeadManager.java


This file is part of JMRI.

JMRI is free software; you can redistribute it and/or modify it under the terms of version 2 of the GNU General Public License as published by the Free Software Foundation. See the "COPYING" file for a copy of this license.

JMRI is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

  • Method Details

    • provideLight

      Get the Light with the user name, then system name if needed; if that fails, create a new Light. If the name is a valid system name, it will be used for the new Light. Otherwise, the Manager.makeSystemName(java.lang.String) method will attempt to turn it into a valid system name.

      This provides the same function as ProvidingManager.provide(java.lang.String) which has a more generic form.

      Parameters:
      name - User name, system name, or address which can be promoted to system name
      Returns:
      Never null under normal circumstances
      Throws:
      IllegalArgumentException
    • provide

      Get an existing instance via user name, then system name; if no matching instance is found, create a new NameBean from the system name.

      If the name is a valid system name, it will be used for the new NamedBean. Otherwise, the Manager.makeSystemName(java.lang.String) method will attempt to turn it into a valid system name which the manager will attempt to use. If that fails, an exception is thrown.

      This is similar to the specific methods found in certain type-specific managers: TurnoutManager.provideTurnout(java.lang.String), SensorManager.provideSensor(java.lang.String), et al. Those might be more mnemonic; this one is more generic. Neither is preferred nor deprecated; use your choice.

      Specified by:
      provide in interface ProvidingManager<Light>
      Parameters:
      name - User name, system name, or address which can be promoted to system name
      Returns:
      Never null
      Throws:
      IllegalArgumentException - if NamedBean doesn't already exist and the manager cannot create it due to an illegal name or name that can't be parsed.
    • dispose

      void dispose()
      Free resources when no longer used. Specifically, remove all references to and from this object, so it can be garbage-collected.
      Specified by:
      dispose in interface Manager<Light>
    • getLight

      Get an existing Light or return null if it doesn't exist.

      Locates via user name, then system name if needed.

      Parameters:
      name - User name, system name, or address which can be promoted to system name
      Returns:
      Light, or null if no existing Light.
    • newLight

      Return a Light with the specified user or system name. Lookup Light by UserName, then Provide New Light by SystemName. Note that two calls with the same arguments will get the same instance; there is only one Light object representing a given physical Light 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 Light object created; a valid system name must be provided
      • If both names are provided, the system name defines the hardware access of the desired sensor, 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 Lights when you should be looking them up.
      Parameters:
      systemName - the desired system name
      userName - the desired user name
      Returns:
      requested Light object (never null)
      Throws:
      IllegalArgumentException - if cannot create the Light due to e.g. an illegal name or name that can't be parsed.
    • getByUserName

      Locate a Light by its user name.
      Specified by:
      getByUserName in interface Manager<Light>
      Parameters:
      s - the user name
      Returns:
      the light or null if not found
    • getBySystemName

      Locate a Light by its system name.
      Specified by:
      getBySystemName in interface Manager<Light>
      Parameters:
      s - the system name
      Returns:
      the light or null if not found
    • validSystemNameConfig

      @CheckReturnValue default boolean validSystemNameConfig​(@Nonnull String systemName)
      Test if parameter is a valid system name for current configuration.
      Parameters:
      systemName - the system name
      Returns:
      true if valid; false otherwise
    • convertSystemNameToAlternate

      Convert the system name to a normalized alternate name.

      This routine is to allow testing to ensure that two Lights with alternate names that refer to the same output bit are not created.

      This routine is implemented in AbstractLightManager to return "". If a system implementation has alternate names, the system specific Light Manager should override this routine and supply the alternate name.

      Parameters:
      systemName - the system name to convert
      Returns:
      an alternate name
    • activateAllLights

      Activate the control mechanism for each Light controlled by this LightManager. Note that some Lights don't require any activation. The activateLight method in AbstractLight.java determines what needs to be done for each Light.
    • supportsVariableLights

      Test if system in the given name can support a variable light.
      Parameters:
      systemName - the system name
      Returns:
      true if variable lights are supported; false otherwise
    • allowMultipleAdditions

      Test if possible to generate multiple lights given a numerical range to complete the system name.
      Parameters:
      systemName - the system name
      Returns:
      true if multiple lights can be created at once; false otherwise
    • getNextValidAddress

      @Nonnull String getNextValidAddress​(@Nonnull String curAddress, @Nonnull String prefix, boolean ignoreInitialExisting) throws JmriException
      Get the Next valid hardware address. Used by the Turnout / Sensor / Reporter / Light Manager classes.

      System-specific methods may want to override getIncrement() rather than this one.

      Parameters:
      curAddress - the starting hardware address to get the next valid from.
      prefix - system prefix, just system name, not type letter.
      ignoreInitialExisting - false to return the starting address if it does not exist, else true to force an increment.
      Returns:
      the next valid system name, excluding both system name prefix and type letter.
      Throws:
      JmriException - if unable to get the current / next address, or more than 10 next addresses in use.
    • createSystemName

      Get a system name for a given hardware address and system prefix.
      Parameters:
      curAddress - desired hardware address
      prefix - system prefix used in system name, excluding Bean type-letter.
      Returns:
      the complete Light system name for the prefix and current address
      Throws:
      JmriException - if unable to create a system name for the given address, possibly due to invalid address format