## org.apache.lucene.util.automaton
Class State

    java.lang.Object
      org.apache.lucene.util.automaton.State

All Implemented Interfaces:
  Comparable<State>

    public class State

extends Object
implements Comparable<State>

`Automaton` state.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary
`int` `numTransitions`
`Transition[]` `transitionsArray`

Constructor Summary
`State()` Constructs a new state.

Method Summary
`void` `addTransition(Transition t)` Adds an outgoing transition.
`int` `compareTo(State s)` Compares this object with the specified object for order.
`int` `getNumber()` Return this state's number.
`Iterable<Transition>` `getTransitions()` Returns the set of outgoing transitions.
`int` `hashCode()`
`boolean` `isAccept()` Returns acceptance status.
`int` `numTransitions()`
`void` `reduce()` Reduces this state.
`void` `setAccept(boolean accept)` Sets acceptance for this state.
`void` `setTransitions(Transition[] transitions)`
`void` `sortTransitions(Comparator<Transition> comparator)` Sorts transitions array in-place.
`State` `step(int c)` Performs lookup in transitions, assuming determinism.
`void` `step(int c, Collection<State> dest)` Performs lookup in transitions, allowing nondeterminism.
`String` `toString()` Returns string describing this state.
`void` `trimTransitionsArray()` Downsizes transitionArray to numTransitions

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, notify, notifyAll, wait, wait, wait`

Field Detail

### transitionsArray

    public Transition[] transitionsArray

### numTransitions

    public int numTransitions

Constructor Detail

### State

    public State()

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

Method Detail

### getTransitions

    public Iterable<Transition> getTransitions()

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

  Returns:
    transition set

### numTransitions

    public int numTransitions()

### setTransitions

    public void setTransitions(Transition[] transitions)

### addTransition

    public void addTransition(Transition t)

  Adds an outgoing transition.

  Parameters:
    `t` - transition

### setAccept

    public void setAccept(boolean accept)

  Sets acceptance for this state.

  Parameters:
    `accept` - if true, this state is an accept state

### isAccept

    public boolean isAccept()

  Returns acceptance status.

  Returns:
    true is this is an accept state

### step

    public State step(int c)

  Performs lookup in transitions, assuming determinism.

  Parameters:
    `c` - codepoint to look up
  Returns:
    destination state, null if no matching outgoing transition
  See Also:
    `step(int, Collection)`

### step

    public void step(int c,
                     Collection<State> dest)

  Performs lookup in transitions, allowing nondeterminism.

  Parameters:
    `c` - codepoint to look up
    `dest` - collection where destination states are stored
  See Also:
    `step(int)`

### trimTransitionsArray

    public void trimTransitionsArray()

  Downsizes transitionArray to numTransitions

### reduce

    public void reduce()

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

### sortTransitions

    public void sortTransitions(Comparator<Transition> comparator)

  Sorts transitions array in-place.

### getNumber

    public int getNumber()

  Return this state's number.

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

  Returns:
    the number

### toString

    public String toString()

  Returns string describing this state. Normally invoked via `Automaton.toString()`.

  Overrides:
    `toString` in class `Object`

### compareTo

    public int compareTo(State s)

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

  Specified by:
    `compareTo` in interface `Comparable<State>`

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

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