org.mbs.services.device.abstractdriver
Class DeviceStateGraph

java.lang.Object
  org.mbs.services.device.abstractdriver.DeviceStateGraph

All Implemented Interfaces:

TagListener

public class DeviceStateGraph
extends java.lang.Object
implements TagListener

This class represents device state graph. Device state graph is loaded from XML file following the syntax described in stategraph.dtd.

Note: This class is not fully implemented yet!

Since:

$Date: 2004/09/15 15:46:23 $

Author:

Stoyan Zoubev

Constructor Summary

DeviceStateGraph(org.osgi.framework.BundleContext bc, java.io.InputStream is)

Method Summary

java.lang.String	getCurrentState(AbstractDeviceModel model, java.lang.String lastState) Evaluate state conditions upon the given device model and return the id of the state which condition is satisfied.
boolean	isActionAllowed(java.lang.String currentState, java.lang.String actionId) Check if the given action id is in the list of allowed actions of the current state.
boolean	isModelInconsistent(java.lang.String currentState, java.lang.String stateVarId) Check if the given state variable id is in the list of possible state var events of the current state.
static boolean	isStateVariableIgnored(java.lang.String stateVarId)
void	useTag(TagClass tag) Invoked when a tag has been closed

Methods inherited from class java.lang.Object

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

Constructor Detail

DeviceStateGraph

public DeviceStateGraph(org.osgi.framework.BundleContext bc,
                        java.io.InputStream is)
                 throws java.io.IOException

Throws:

java.io.IOException

Method Detail

useTag

public void useTag(TagClass tag)

Description copied from interface: TagListener

Invoked when a tag has been closed

Specified by:

useTag in interface TagListener

Parameters:

tag - tag with its content and its subtags

See Also:

TagListener.useTag(com.prosyst.util.xml.TagClass)

getCurrentState

public java.lang.String getCurrentState(AbstractDeviceModel model,
                                        java.lang.String lastState)

Evaluate state conditions upon the given device model and return the id of the state which condition is satisfied.

Parameters:

model - the device model

lastState - the previous state, necessary to validate the transition. The parameter may be null if the model is initialized.

Returns:

the id of the current state of the device

isModelInconsistent

public boolean isModelInconsistent(java.lang.String currentState,
                                   java.lang.String stateVarId)

Check if the given state variable id is in the list of possible state var events of the current state.

Parameters:

currentState - the id of the current state

stateVarId - the id of the state variable

Returns:

true if the given state variable id is NOT in the list of possible state var events of the current state.

isStateVariableIgnored

public static boolean isStateVariableIgnored(java.lang.String stateVarId)

isActionAllowed

public boolean isActionAllowed(java.lang.String currentState,
                               java.lang.String actionId)

Check if the given action id is in the list of allowed actions of the current state.

Parameters:

currentState - the id of the current state

actionId - the id of the action

Returns:

true if the given state variable id is in the list of possible state var events of the current state.