CLucene API Documentation (Version )

00001 /*------------------------------------------------------------------------------
00002 * Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
00003 * 
00004 * Distributable under the terms of either the Apache License (Version 2.0) or 
00005 * the GNU Lesser General Public License, as specified in the COPYING file.
00006 ------------------------------------------------------------------------------*/
00007 #ifndef _lucene_search_CachingWrapperFilter_
00008 #define _lucene_search_CachingWrapperFilter_
00009 
00010 //#include "CLucene/util/BitSet.h"
00011 //#include "CLucene/index/IndexReader.h"
00012 #include "Filter.h"
00013 
00014 CL_NS_DEF(search)
00020 class CLUCENE_EXPORT AbstractCachingFilter: public Filter 
00021 {
00022         struct Internal;
00023         Internal* internal;
00024         void closeCallback(CL_NS(index)::IndexReader* reader, void* param);
00025 protected:
00026         AbstractCachingFilter( const AbstractCachingFilter& copy );
00027         virtual CL_NS(util)::BitSet* doBits( CL_NS(index)::IndexReader* reader ) = 0;
00028         virtual bool doShouldDeleteBitSet( CL_NS(util)::BitSet* bits ){ return false; }
00029         AbstractCachingFilter();
00030 public:
00031         virtual ~AbstractCachingFilter();
00032 
00035         CL_NS(util)::BitSet* bits( CL_NS(index)::IndexReader* reader );
00036         
00037         virtual Filter *clone() const = 0;
00038         virtual TCHAR *toString() = 0;
00039         
00040         bool shouldDeleteBitSet( const CL_NS(util)::BitSet* bits ) const{ return false; }
00041 };
00042 
00048 class CachingWrapperFilter: public AbstractCachingFilter 
00049 {
00050 private:
00051         Filter* filter;
00052         bool deleteFilter;
00053 protected:
00054         CachingWrapperFilter( const CachingWrapperFilter& copy );
00055         CL_NS(util)::BitSet* doBits( CL_NS(index)::IndexReader* reader );
00056         bool doShouldDeleteBitSet( CL_NS(util)::BitSet* bits );
00057 public:
00058         CachingWrapperFilter( Filter* filter, bool deleteFilter=true );
00059         ~CachingWrapperFilter();
00060 
00061         Filter *clone() const;
00062         TCHAR *toString();
00063 };
00064 
00065 CL_NS_END
00066 #endif
CachingWrapperFilter.h
