org.apache.lucene.search

Class BooleanFilter

java.lang.Object

org.apache.lucene.search.Filter

org.apache.lucene.search.BooleanFilter

All Implemented Interfaces:

Serializable

public class BooleanFilter
extends Filter

A container Filter that allows Boolean composition of Filters. Filters are allocated into one of three logical constructs; SHOULD, MUST NOT, MUST The results Filter BitSet is constructed as follows: SHOULD Filters are OR'd together The resulting Filter is NOT'd with the NOT Filters The resulting Filter is AND'd with the MUST Filters

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
BooleanFilter()

Method Summary

Methods

Modifier and Type	Method and Description
void	add(FilterClause filterClause) Adds a new FilterClause to the Boolean Filter container
boolean	equals(Object obj)
protected DocIdSet	finalResult(OpenBitSetDISI result, int maxDocs) Provide a SortedVIntList when it is definitely smaller than an OpenBitSet
DocIdSet	getDocIdSet(IndexReader reader) Returns the a DocIdSetIterator representing the Boolean composition of the filters that have been added.
int	hashCode()
String	toString() Prints a user-readable version of this query.

Methods inherited from class org.apache.lucene.search.Filter

bits

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanFilter

public BooleanFilter()

Method Detail

getDocIdSet

public DocIdSet getDocIdSet(IndexReader reader)
                     throws IOException

Returns the a DocIdSetIterator representing the Boolean composition of the filters that have been added.

Overrides:

getDocIdSet in class Filter

Throws:

IOException

finalResult

protected DocIdSet finalResult(OpenBitSetDISI result,
                   int maxDocs)

Provide a SortedVIntList when it is definitely smaller than an OpenBitSet

add

public void add(FilterClause filterClause)

Adds a new FilterClause to the Boolean Filter container

Parameters:

filterClause - A FilterClause object containing a Filter and an Occur parameter

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Prints a user-readable version of this query.

Overrides:

toString in class Object