net.dpml.state
Class NullState

java.lang.Object
  net.dpml.state.NullState

All Implemented Interfaces:

Serializable, State

public final class NullState

extends Object

implements State, Serializable

Null state implementation.

Version:

1.0.1

Author:

Digital Product Meta Library

See Also:

Serialized Form

Field Summary

Fields inherited from interface net.dpml.state.State

NULL_STATE, TYPE

Constructor Summary

NullState()

Method Summary

boolean	equals(Object other) Test is this state is equal to the supplied object.
Interface[]	getInterfaces() Return the array of operations associated with the state.
String	getName() Return the name of the state.
Operation[]	getOperations() Return the array of operations associated with the state.
State	getParent() Return the parent state to this state or null if this is the root of a state graph.
State[]	getStatePath() Return the state path.
State[]	getStates() Return the substates within this state.
Transition[]	getTransitions() Return the array of transtions associated with the state.
Trigger[]	getTriggers() Return the array of triggers associated with the state.
int	hashCode() Calcualte the hashcode for this instance.
boolean	isTerminal() Test is the state is a terminal state.
void	setParent(State state) Set the parent state.

Methods inherited from class java.lang.Object

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

Constructor Detail

NullState

public NullState()

Method Detail

getName

public String getName()

Return the name of the state.

Specified by:

getName in interface State

Returns:

the state name

setParent

public void setParent(State state)

Set the parent state.

Specified by:

setParent in interface State

Parameters:

state - the parent state

getParent

public State getParent()

Return the parent state to this state or null if this is the root of a state graph.

Specified by:

getParent in interface State

Returns:

the parent state

getStatePath

public State[] getStatePath()

Return the state path. The path is composed of a sequence of states from the root to this state.

Specified by:

getStatePath in interface State

Returns:

the state path

getStates

public State[] getStates()

Return the substates within this state.

Specified by:

getStates in interface State

Returns:

the substate array

getTriggers

public Trigger[] getTriggers()

Return the array of triggers associated with the state.

Specified by:

getTriggers in interface State

Returns:

the trigger array

getTransitions

public Transition[] getTransitions()

Return the array of transtions associated with the state.

Specified by:

getTransitions in interface State

Returns:

the transition array

getOperations

public Operation[] getOperations()

Return the array of operations associated with the state.

Specified by:

getOperations in interface State

Returns:

the operation array

getInterfaces

public Interface[] getInterfaces()

Return the array of operations associated with the state.

Specified by:

getInterfaces in interface State

Returns:

the operation array

isTerminal

public boolean isTerminal()

Test is the state is a terminal state.

Specified by:

isTerminal in interface State

Returns:

true if terminal

equals

public boolean equals(Object other)

Test is this state is equal to the supplied object.

Parameters:

other - the other object

Returns:

true if equal

hashCode

public int hashCode()

Calcualte the hashcode for this instance.

Returns:

the hashcode value