org.mbs.services.device.abstractdriver
Class TokenDeviceControlUnit

java.lang.Object
  org.mbs.services.cu.generator.ServiceObject
      org.mbs.services.cu.generator.DefaultControlUnit
          org.mbs.services.device.abstractdriver.DeviceControlUnit
              org.mbs.services.device.abstractdriver.TokenDeviceControlUnit

All Implemented Interfaces:

ControlConstants, ControlUnit, ManagedControlUnit

public class TokenDeviceControlUnit
extends DeviceControlUnit

This is the extension of DeviceControlUnit with token mechanism supported.

Since:

$Date: 2004/07/21 12:57:56 $

Author:

Stoyan Zoubev

Field Summary

Fields inherited from class org.mbs.services.cu.generator.DefaultControlUnit

ACTION_PREFIX, CHECK_INPUT, controller, controllerMethods, model

Fields inherited from interface org.mbs.services.cu.ControlConstants

CONSTRUCTOR_PREFIX, DESTRUCTOR, EVENT_FILTER, EVENT_SYNC, EVENT_TYPE, FINDER_PREFIX, ID, PARENT_ID, PARENT_ROOT, PARENT_TYPE, STATE_VARIABLE_ID, SV_LIST_SV_ID, TYPE, VERSION

Constructor Summary

TokenDeviceControlUnit(AbstractDeviceModel model, AbstractDeviceController controller, DeviceStateGraph stateGraph)

Method Summary

java.lang.Object	invokeAction(java.lang.String actionId, java.lang.Object args) Executes the specified action over this control unit.
java.lang.Object	queryStateVariable(java.lang.String svarId) Returns the value of a specified state variable.

Methods inherited from class org.mbs.services.cu.generator.DefaultControlUnit

checkActionInputArguments, fillDefaultProperties, getId, getType, release, setControlUnitCallback

Methods inherited from class org.mbs.services.cu.generator.ServiceObject

registerService, unregisterService

Methods inherited from class java.lang.Object

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

Constructor Detail

TokenDeviceControlUnit

public TokenDeviceControlUnit(AbstractDeviceModel model,
                              AbstractDeviceController controller,
                              DeviceStateGraph stateGraph)

Method Detail

invokeAction

public java.lang.Object invokeAction(java.lang.String actionId,
                                     java.lang.Object args)
                              throws java.lang.Exception

Description copied from interface: ControlUnit

Executes the specified action over this control unit. Actions supported by a control unit and the number and types of the input and output arguments of each action are defined by the metadata of the control unit.

Specified by:

invokeAction in interface ControlUnit

Overrides:

invokeAction in class DeviceControlUnit

Parameters:

actionId - the id of the action

args - the input argument(s). If the argument is only one this is the argument itself. If the arguments are more then one, the value must be a Object[] and arguments are retrieved from that array.

Returns:

the output argument(s) or null if the action does not return value.

Throws:

java.lang.Exception - if an error occurs while executing action.

java.lang.IllegalArgumentException - if this control unit does not have action with the supplied Id or the arguments number and/or types do not match the action arguments.

See Also:

ControlUnit.invokeAction(java.lang.String, java.lang.Object)

queryStateVariable

public java.lang.Object queryStateVariable(java.lang.String svarId)

Description copied from interface: ControlUnit

Returns the value of a specified state variable. State variables supported by a control unit and their types are defined by the metadata of the control unit.

Specified by:

queryStateVariable in interface ControlUnit

Overrides:

queryStateVariable in class DefaultControlUnit

Parameters:

svarId - the id of the variable

Returns:

value of the variable

See Also:

org.msb.services.cu.ControlUnit#queryStateVariable(java.lang.String)