Package org.apache.lucene.util.automaton

Class RunAutomaton

java.lang.Object
org.apache.lucene.util.automaton.RunAutomaton
Direct Known Subclasses:
ByteRunAutomaton, CharacterRunAutomaton
public abstract class RunAutomaton extends Object
Finite-state automaton with fast run operation.

  • Constructor Summary

    Constructors
    Constructor
    Description
    RunAutomaton(Automaton a, int maxInterval, boolean tableize)
    Constructs a new RunAutomaton from a deterministic Automaton.

  • Method Summary

    Modifier and Type
    Method
    Description
    boolean
    equals(Object obj)
     
    final int[]
    getCharIntervals()
    Returns array of codepoint class interval start points.
    final int
    getInitialState()
    Returns initial state.
    final int
    getSize()
    Returns number of states in automaton.
    int
    hashCode()
     
    final boolean
    isAccept(int state)
    Returns acceptance status for given state.
    final int
    step(int state, int c)
    Returns the state obtained by reading the given char from the given state.
    String
    toString()
    Returns a string representation of this automaton.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • RunAutomaton

      public RunAutomaton(Automaton a, int maxInterval, boolean tableize)
      Constructs a new RunAutomaton from a deterministic Automaton.
      Parameters:
      a - an automaton

  • Method Details

    • toString

      public String toString()
      Returns a string representation of this automaton.
      Overrides:
      toString in class Object

    • getSize

      public final int getSize()
      Returns number of states in automaton.

    • isAccept

      public final boolean isAccept(int state)
      Returns acceptance status for given state.

    • getInitialState

      public final int getInitialState()
      Returns initial state.

    • getCharIntervals

      public final int[] getCharIntervals()
      Returns array of codepoint class interval start points. The array should not be modified by the caller.

    • step

      public final int step(int state, int c)
      Returns the state obtained by reading the given char from the given state. Returns -1 if not obtaining any such state. (If the original Automaton had no dead states, -1 is returned here if and only if a dead state is entered in an equivalent automaton with a total transition function.)

    • hashCode

      public int hashCode()
      Overrides:
      hashCode in class Object

    • equals

      public boolean equals(Object obj)
      Overrides:
      equals in class Object