org.apache.lucene.search

Class CachingSpanFilter

java.lang.Object

org.apache.lucene.search.Filter

org.apache.lucene.search.SpanFilter

org.apache.lucene.search.CachingSpanFilter

All Implemented Interfaces:

java.io.Serializable

public class CachingSpanFilter
extends SpanFilter

Wraps another SpanFilter's result and caches it. The purpose is to allow filters to simply filter, and then wrap with this class to add caching.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
CachingSpanFilter(SpanFilter filter)

Method Summary

Modifier and Type	Method and Description
java.util.BitSet	bits(IndexReader reader) Returns a BitSet with true for documents which should be permitted in search results, and false for those that should not.
SpanFilterResult	bitSpans(IndexReader reader) Returns a SpanFilterResult with true for documents which should be permitted in search results, and false for those that should not and Spans for where the true docs match.
boolean	equals(java.lang.Object o)
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CachingSpanFilter

public CachingSpanFilter(SpanFilter filter)

Parameters:

filter - Filter to cache results of

Method Detail

bits

public java.util.BitSet bits(IndexReader reader)
                      throws java.io.IOException

Description copied from class: Filter

Returns a BitSet with true for documents which should be permitted in search results, and false for those that should not.

Specified by:

bits in class Filter

Throws:

java.io.IOException

bitSpans

public SpanFilterResult bitSpans(IndexReader reader)
                          throws java.io.IOException

Description copied from class: SpanFilter

Returns a SpanFilterResult with true for documents which should be permitted in search results, and false for those that should not and Spans for where the true docs match.

Specified by:

bitSpans in class SpanFilter

Parameters:

reader - The IndexReader to load position and bitset information from

Returns:

A SpanFilterResult

Throws:

java.io.IOException - if there was an issue accessing the necessary information

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object