Class State

Automaton state.

This is a Lucene.NET EXPERIMENTAL API, use at your own risk
Inheritance
System.Object
State
Namespace: Lucene.Net.Util.Automaton
Assembly: Lucene.Net.dll
Syntax
public class State : IComparable<State>

Constructors

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State()

Constructs a new state. Initially, the new state is a reject state.

Declaration
public State()

Properties

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Accept

Sets acceptance for this state. If true, this state is an accept state.

Declaration
public virtual bool Accept { get; set; }
Property Value
Type Description
System.Boolean
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Number

Return this state's number.

Expert: Will be useless unless GetNumberedStates() has been called first to number the states.

Declaration
public virtual int Number { get; }
Property Value
Type Description
System.Int32

The number.

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NumTransitions

Declaration
public virtual int NumTransitions { get; }
Property Value
Type Description
System.Int32
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TransitionsArray

Declaration
public Transition[] TransitionsArray { get; }
Property Value
Type Description
Transition[]

Methods

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AddTransition(Transition)

Adds an outgoing transition.

Declaration
public virtual void AddTransition(Transition t)
Parameters
Type Name Description
Transition t

Transition.

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CompareTo(State)

Compares this object with the specified object for order. States are ordered by the time of construction.

Declaration
public virtual int CompareTo(State s)
Parameters
Type Name Description
State s
Returns
Type Description
System.Int32
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GetHashCode()

Declaration
public override int GetHashCode()
Returns
Type Description
System.Int32
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GetTransitions()

Returns the set of outgoing transitions. Subsequent changes are reflected in the automaton.

Declaration
public virtual IEnumerable<Transition> GetTransitions()
Returns
Type Description
IEnumerable<Transition>

Transition set.

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Reduce()

Reduces this state. A state is "reduced" by combining overlapping and adjacent edge intervals with same destination.

Declaration
public virtual void Reduce()
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SetTransitions(Transition[])

Declaration
public virtual void SetTransitions(Transition[] transitions)
Parameters
Type Name Description
Transition[] transitions
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SortTransitions(IComparer<Transition>)

Returns sorted list of outgoing transitions.

Declaration
public virtual void SortTransitions(IComparer<Transition> comparer)
Parameters
Type Name Description
IComparer<Transition> comparer

Comparer to sort with.

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Step(Int32)

Performs lookup in transitions, assuming determinism.

Declaration
public virtual State Step(int c)
Parameters
Type Name Description
System.Int32 c

Codepoint to look up.

Returns
Type Description
State

Destination state, null if no matching outgoing transition.

See Also
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Step(Int32, ICollection<State>)

Performs lookup in transitions, allowing nondeterminism.

Declaration
public virtual void Step(int c, ICollection<State> dest)
Parameters
Type Name Description
System.Int32 c

Codepoint to look up.

ICollection<State> dest

Collection where destination states are stored.

See Also
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ToString()

Returns string describing this state. Normally invoked via ToString().

Declaration
public override string ToString()
Returns
Type Description
System.String
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TrimTransitionsArray()

Downsizes transitionArray to numTransitions.

Declaration
public virtual void TrimTransitionsArray()