Package org.apache.lucene.util.fst

Class IntsRefFSTEnum<T>

java.lang.Object

org.apache.lucene.util.fst.IntsRefFSTEnum<T>

public final class IntsRefFSTEnum<T>
extends Object

Enumerates all input (IntsRef) + output pairs in an FST.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	IntsRefFSTEnum.InputOutput<T>	Holds a single input (IntsRef) + output pair.

Constructor Summary

Constructors

Constructor	Description
IntsRefFSTEnum(FST<T> fst)	doFloor controls the behavior of advance: if it's true doFloor is true, advance positions to the biggest term before target.

Method Summary

Modifier and Type	Method	Description
IntsRefFSTEnum.InputOutput<T>	current()
IntsRefFSTEnum.InputOutput<T>	next()
IntsRefFSTEnum.InputOutput<T>	seekCeil(IntsRef target)	Seeks to smallest term that's >= target.
IntsRefFSTEnum.InputOutput<T>	seekExact(IntsRef target)	Seeks to exactly this term, returning null if the term doesn't exist.
IntsRefFSTEnum.InputOutput<T>	seekFloor(IntsRef target)	Seeks to biggest term that's invalid input: '<'= target.

Methods inherited from class java.lang.Object

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

Constructor Details

IntsRefFSTEnum

public IntsRefFSTEnum(FST<T> fst)

doFloor controls the behavior of advance: if it's true doFloor is true, advance positions to the biggest term before target.

Method Details

current

public IntsRefFSTEnum.InputOutput<T> current()

next

public IntsRefFSTEnum.InputOutput<T> next()
                                   throws IOException

Throws:

IOException

seekCeil

public IntsRefFSTEnum.InputOutput<T> seekCeil(IntsRef target)
                                       throws IOException

Seeks to smallest term that's >= target.

Throws:

IOException

seekFloor

public IntsRefFSTEnum.InputOutput<T> seekFloor(IntsRef target)
                                        throws IOException

Seeks to biggest term that's invalid input: '<'= target.

Throws:

IOException

seekExact

public IntsRefFSTEnum.InputOutput<T> seekExact(IntsRef target)
                                        throws IOException

Seeks to exactly this term, returning null if the term doesn't exist. This is faster than using seekFloor(org.apache.lucene.util.IntsRef) or seekCeil(org.apache.lucene.util.IntsRef) because it short-circuits as soon the match is not found.

Throws:

IOException