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DocumentStructureHolderNode.hpp

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00001 /*==========================================================================
00002  * Copyright (c) 2004 University of Massachusetts.  All Rights Reserved.
00003  *
00004  * Use of the Lemur Toolkit for Language Modeling and Information Retrieval
00005  * is subject to the terms of the software license set forth in the LICENSE
00006  * file included with this software, and also available at
00007  * http://www.lemurproject.org/license.html
00008  *
00009  *==========================================================================
00010 */
00011 
00012 
00013 //
00014 // DocumentStructureHolderNode
00015 //
00016 // 18 June 2005 -- pto
00017 //
00018 // This node stores the document structure for the current document
00019 // to be shared among shrinkage belief nodes or other nodes that 
00020 // may need to use the document structure for retrieval.
00021 //
00022 
00023 #ifndef INDRI_DOCUMENTSTRUCTUREHOLDERNODE_HPP
00024 #define INDRI_DOCUMENTSTRUCTUREHOLDERNODE_HPP
00025 
00026 #include "indri/ListIteratorNode.hpp"
00027 #include "indri/greedy_vector"
00028 #include "indri/Index.hpp"
00029 #include "indri/DocumentStructure.hpp"
00030 
00031 namespace indri {
00032   namespace infnet {
00033 
00034     class DocumentStructureHolderNode : public InferenceNetworkNode {
00035     private:
00036       indri::index::Index * _index;
00037       lemur::api::DOCID_T _nextDocument;
00038       indri::index::TermListFileIterator * _docIter;
00039       lemur::api::DOCID_T  _docIterID;
00040       std::string _name;
00041       indri::index::DocumentStructure * _documentStructure;
00042 
00043     public:
00044       DocumentStructureHolderNode( const std::string& name );
00045       ~DocumentStructureHolderNode();
00046       
00047       void prepare( lemur::api::DOCID_T documentID );
00048       lemur::api::DOCID_T nextCandidateDocument();
00049       const std::string& getName() const;
00050       indri::index::DocumentStructure * getDocumentStructure();
00051      
00052       void indexChanged( indri::index::Index& index);
00053     };
00054   }
00055 }
00056 #endif // INDRI_DOCUMENTSTRUCTUREHOLDERNODE_HPP
00057 

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