ConjunctionDISI.ConjunctionTwoPhaseIterator

java.lang.Object
- org.apache.lucene.search.TwoPhaseIterator
- - org.apache.lucene.search.ConjunctionDISI.ConjunctionTwoPhaseIterator

Enclosing class:: ConjunctionDISI

private static final class ConjunctionDISI.ConjunctionTwoPhaseIterator
extends TwoPhaseIterator

TwoPhaseIterator implementing a conjunction.

Field Summary

Fields
Modifier and Type Field Description

private float matchCost

private TwoPhaseIterator[] twoPhaseIterators
- Fields inherited from class org.apache.lucene.search.TwoPhaseIterator
  approximation

Constructor Summary

Constructors
Modifier	Constructor	Description
`private`	`ConjunctionTwoPhaseIterator(DocIdSetIterator approximation, java.util.List<? extends TwoPhaseIterator> twoPhaseIterators)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`float`	`matchCost()`	An estimate of the expected cost to determine that a single document `TwoPhaseIterator.matches()`.
`boolean`	`matches()`	Return whether the current doc ID that `TwoPhaseIterator.approximation()` is on matches.

Methods inherited from class org.apache.lucene.search.TwoPhaseIterator
approximation, asDocIdSetIterator, unwrap

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

- Field Detail
  - twoPhaseIterators
```
private final TwoPhaseIterator[] twoPhaseIterators
```
  - matchCost
```
private final float matchCost
```
- Constructor Detail
  - ConjunctionTwoPhaseIterator
```
private ConjunctionTwoPhaseIterator(DocIdSetIterator approximation,
                                    java.util.List<? extends TwoPhaseIterator> twoPhaseIterators)
```
- Method Detail
  - matches
```
public boolean matches()
                throws java.io.IOException
```
    Description copied from class: TwoPhaseIterator
    
    Return whether the current doc ID that TwoPhaseIterator.approximation() is on matches. This method should only be called when the iterator is positioned -- ie. not when DocIdSetIterator.docID() is -1 or DocIdSetIterator.NO_MORE_DOCS -- and at most once.
    
    Specified by:
    
    matches in class TwoPhaseIterator
    
    Throws:
    
    java.io.IOException
  - matchCost
```
public float matchCost()
```
    Description copied from class: TwoPhaseIterator
    
    An estimate of the expected cost to determine that a single document TwoPhaseIterator.matches(). This can be called before iterating the documents of TwoPhaseIterator.approximation(). Returns an expected cost in number of simple operations like addition, multiplication, comparing two numbers and indexing an array. The returned value must be positive.
    
    Specified by:
    
    matchCost in class TwoPhaseIterator