org.jacop.constraints.regular

Class RegState

java.lang.Object

org.jacop.constraints.regular.RegState

Direct Known Subclasses:

RegStateDom, RegStateInt

public abstract class RegState
extends Object

The state class representing a state in the regular automaton within Regular constraint.

Version:

4.9

Author:

Polina Makeeva and Radoslaw Szymanek

Field Summary

Fields

Modifier and Type	Field and Description
int	id The unique id of the state.
int	inDegree It specifies the number of edges incoming to the state.
int	level It specifies the level, the variable position this state is associated with.
int	outDegree It specifies the number of edges outgoing from the state.
int	pos The position of the state within a level.
RegState[]	successors It specifies the list of successor states for this state.

Constructor Summary

Constructors

Constructor and Description
RegState()

Method Summary

Modifier and Type	Method and Description
abstract void	add(IntDomain varDom, int successorNo) It adds to domain values which are accepted by a given edge.
abstract void	addTransition(RegState suc, Integer val) It specifies that for a given value an automata will move from the current state to the successor state.
abstract void	addTransitions(RegState suc, IntervalDomain val) It specifies that for a given values from an interval an automata will move from the current state to the successor state.
abstract boolean	intersects(IntDomain dom, int successorNo) It checks if the accepting values associated with an edge intersect.
abstract boolean	isActive(TimeStamp<Integer>[] activeLevels) The function return if the state is still active.
abstract void	removeTransition(int pos) It informs the state that the edge on the given position is no longer active.
abstract void	setSupports(Map<Integer,RegEdge> hashMap, int successorNo)
abstract String	sucDomToString(int successorNo)
abstract boolean	updateSupport(RegEdge edge, int v) It updates a support if given state supports given value.

Methods inherited from class java.lang.Object

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

Field Detail

successors

public RegState[] successors

It specifies the list of successor states for this state.

outDegree

public int outDegree

It specifies the number of edges outgoing from the state.

inDegree

public int inDegree

It specifies the number of edges incoming to the state.

id

public int id

The unique id of the state.

level

public int level

It specifies the level, the variable position this state is associated with.

pos

public int pos

The position of the state within a level.

Constructor Detail

RegState

public RegState()

Method Detail

addTransitions

public abstract void addTransitions(RegState suc,
                                    IntervalDomain val)

It specifies that for a given values from an interval an automata will move from the current state to the successor state.

Parameters:

suc - successor state

val - interval of accepting values.

addTransition

public abstract void addTransition(RegState suc,
                                   Integer val)

It specifies that for a given value an automata will move from the current state to the successor state.

Parameters:

suc - successor state

val - an accepting value

isActive

public abstract boolean isActive(TimeStamp<Integer>[] activeLevels)

The function return if the state is still active. It depends on how many active levels remains for state level and the position of the state.

Parameters:

activeLevels - -

Returns:

true is the state is still active.

removeTransition

public abstract void removeTransition(int pos)

It informs the state that the edge on the given position is no longer active.

Parameters:

pos - position of the edge.

intersects

public abstract boolean intersects(IntDomain dom,
                                   int successorNo)

It checks if the accepting values associated with an edge intersect.

Parameters:

dom - domain against which interesection is performed.

successorNo - a position of the edge.

Returns:

true if at least one value associated with an edge intersects with domain.

setSupports

public abstract void setSupports(Map<Integer,RegEdge> hashMap,
                                 int successorNo)

Parameters:

hashMap - It contains supports for all values of a given variable.

successorNo - it specifies the edge position.

updateSupport

public abstract boolean updateSupport(RegEdge edge,
                                      int v)

It updates a support if given state supports given value.

Parameters:

edge - information about support is stored here.

v - value for which support is looked for.

Returns:

It returns true if state has an edge which supports given value.

add

public abstract void add(IntDomain varDom,
                         int successorNo)

It adds to domain values which are accepted by a given edge.

Parameters:

varDom - - domain collecting suported values.

successorNo - - position of an edge from which values are collected.

sucDomToString

public abstract String sucDomToString(int successorNo)

Parameters:

successorNo - - edge position.

Returns:

It return the string representation of the values accepted by specified edge.