1 files changed, 46 insertions, 0 deletions
diff --git a/3rdparty/clucene/src/CLucene/search/Filter.h b/3rdparty/clucene/src/CLucene/search/Filter.h
new file mode 100644
index 000000000..309c5a9d6
--- /dev/null
+++ b/3rdparty/clucene/src/CLucene/search/Filter.h
@@ -0,0 +1,46 @@
+/*------------------------------------------------------------------------------
+* Copyright (C) 2003-2006 Ben van Klinken and the CLucene Team
+* 
+* Distributable under the terms of either the Apache License (Version 2.0) or 
+* the GNU Lesser General Public License, as specified in the COPYING file.
+------------------------------------------------------------------------------*/
+#ifndef _lucene_search_Filter_
+#define _lucene_search_Filter_
+
+#if defined(_LUCENE_PRAGMA_ONCE)
+# pragma once
+#endif
+
+#include "CLucene/index/IndexReader.h"
+#include "CLucene/util/BitSet.h"
+
+CL_NS_DEF(search)
+  // Abstract base class providing a mechanism to restrict searches to a subset
+  // of an index.
+  class Filter: LUCENE_BASE {
+  public:
+    virtual ~Filter(){
+	}
+	
+	virtual Filter* clone() const = 0;
+
+    /**
+    * Returns a BitSet with true for documents which should be permitted in
+    * search results, and false for those that should not.
+    * MEMORY: read shouldDeleteBitSet
+    */
+    virtual CL_NS(util)::BitSet* bits(CL_NS(index)::IndexReader* reader)=0;
+    
+    /**
+    * Because of the problem of cached bitsets with the CachingWrapperFilter,
+    * CLucene has no way of knowing whether to delete the bitset returned from bits().
+    * To properly clean memory from bits(), pass the bitset to this function. The
+    * Filter should be deleted if this function returns true.
+    */
+	virtual bool shouldDeleteBitSet(const CL_NS(util)::BitSet* bs) const{ return true; }
+
+	//Creates a user-readable version of this query and returns it as as string
+	virtual TCHAR* toString()=0;
+  };
+CL_NS_END
+#endif