org.apache.lucene.util.automaton

Class FiniteStringsIterator

java.lang.Object

org.apache.lucene.util.automaton.FiniteStringsIterator

Direct Known Subclasses:

LimitedFiniteStringsIterator

public class FiniteStringsIterator
extends Object

Iterates all accepted strings.

If the Automaton has cycles then this iterator may throw an IllegalArgumentException, but this is not guaranteed!

Be aware that the iteration order is implementation dependent and may change across releases.

If the automaton is not determinized then it's possible this iterator will return duplicates.

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

Constructor Summary

Constructors

Constructor and Description
FiniteStringsIterator(Automaton a) Constructor.
FiniteStringsIterator(Automaton a, int startState, int endState) Constructor.

Method Summary

Modifier and Type	Method and Description
IntsRef	next() Generate next finite string.

Methods inherited from class java.lang.Object

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

Constructor Detail

FiniteStringsIterator

public FiniteStringsIterator(Automaton a)

Constructor.

Parameters:

a - Automaton to create finite string from.

FiniteStringsIterator

public FiniteStringsIterator(Automaton a,
                             int startState,
                             int endState)

Constructor.

Parameters:

a - Automaton to create finite string from.

startState - The starting state for each path.

endState - The state where each path should stop or -1 if only accepted states should be final.

Method Detail

next

public IntsRef next()

Generate next finite string. The return value is just valid until the next call of this method!

Returns:

Finite string or null, if no more finite strings are available.