org.apache.lucene.search

Class CachingWrapperFilter

java.lang.Object

org.apache.lucene.search.Filter

org.apache.lucene.search.CachingWrapperFilter

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

QueryFilter

public class CachingWrapperFilter
extends Filter

Wraps another filter'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

Field Summary

Fields

Modifier and Type	Field and Description
protected Map	cache A transient Filter cache.
protected Filter	filter

Constructor Summary

Constructors

Constructor and Description
CachingWrapperFilter(Filter filter)

Method Summary

Methods

Modifier and Type	Method and Description
BitSet	bits(IndexReader reader) Deprecated. Use getDocIdSet(IndexReader) instead.
boolean	equals(Object o)
DocIdSet	getDocIdSet(IndexReader reader)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

filter

protected Filter filter

cache

protected transient Map cache

A transient Filter cache. To cache Filters even when using RemoteSearchable use RemoteCachingWrapperFilter instead.

Constructor Detail

CachingWrapperFilter

public CachingWrapperFilter(Filter filter)

Parameters:

filter - Filter to cache results of

Method Detail

bits

public BitSet bits(IndexReader reader)
            throws IOException

Deprecated. Use getDocIdSet(IndexReader) instead.

Overrides:

bits in class Filter

Returns:

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

Throws:

IOException

getDocIdSet

public DocIdSet getDocIdSet(IndexReader reader)
                     throws IOException

Overrides:

getDocIdSet in class Filter

Returns:

a DocIdSet that provides the documents which should be permitted or prohibited in search results.

Throws:

IOException

See Also:

DocIdBitSet

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object