| 1 | /**********************************************************************
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| 2 | *
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| 3 | * queryfilter.h --
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| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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| 5 | *
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| 6 | * PUT COPYRIGHT NOTICE HERE
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| 7 | *
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| 8 | * $Id: queryfilter.h 351 1999-07-07 06:19:47Z rjmcnab $
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| 9 | *
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| 10 | *********************************************************************/
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| 11 |
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| 12 |
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| 13 | #ifndef QUERYFILTER_H
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| 14 | #define QUERYFILTER_H
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| 15 |
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| 16 |
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| 17 | #include "gsdlconf.h"
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| 18 | #include "text_t.h"
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| 19 | #include "comtypes.h"
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| 20 | #include "filter.h"
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| 21 | #include "infodbclass.h"
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| 22 | #include "maptools.h"
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| 23 | #include "mgsearch.h"
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| 24 | #include "queryinfo.h"
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| 25 |
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| 26 |
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| 27 | // resultsorderer_t is used to sort the query results
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| 28 | struct resultsorderer_t {
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| 29 | bool compare_phrase_match;
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| 30 | bool compare_terms_match;
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| 31 | bool compare_doc_weight;
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| 32 | docresultmap *docset;
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| 33 |
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| 34 | resultsorderer_t();
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| 35 | void clear();
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| 36 | bool operator()(const int &t1, const int &t2) const;
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| 37 | };
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| 38 |
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| 39 |
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| 40 |
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| 41 | class queryfilterclass : public filterclass {
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| 42 | protected:
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| 43 |
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| 44 | stringmap indexmap;
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| 45 | stringmap subcollectionmap;
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| 46 | stringmap languagemap;
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| 47 |
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| 48 | text_t gdbm_filename;
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| 49 | gdbmclass *gdbmptr;
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| 50 |
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| 51 | mgsearchclass *mgsearchptr;
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| 52 |
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| 53 | // do aditional query processing
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| 54 | virtual void post_process (const queryparamclass &queryparams,
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| 55 | queryresultsclass &queryresults);
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| 56 |
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| 57 | // get the query parameters
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| 58 | void parse_query_params (const FilterRequest_t &request,
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| 59 | vector<queryparamclass> &query_params,
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| 60 | int &startresults,
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| 61 | int &endresults,
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| 62 | ostream &logout);
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| 63 |
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| 64 | // do query that might involve multiple sub queries
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| 65 | // mgsearchptr and gdbmptr are assumed to be valid
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| 66 | void do_multi_query (const FilterRequest_t &request,
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| 67 | const vector<queryparamclass> &query_params,
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| 68 | queryresultsclass &multiresults,
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| 69 | comerror_t &err, ostream &logout);
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| 70 |
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| 71 | virtual void sort_doc_results (const FilterRequest_t &request,
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| 72 | docresultsclass &docs);
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| 73 |
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| 74 |
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| 75 | public:
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| 76 | queryfilterclass ();
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| 77 | virtual ~queryfilterclass ();
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| 78 |
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| 79 | // the gdbmptr remains the responsability of the calling code
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| 80 | void set_gdbmptr (gdbmclass *thegdbmptr) {gdbmptr=thegdbmptr;}
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| 81 |
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| 82 | // the mgsearchptr remains the responsability of the calling code
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| 83 | void set_mgsearchptr (mgsearchclass *themgsearchptr) {mgsearchptr=themgsearchptr;}
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| 84 |
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| 85 | void configure (const text_t &key, const text_tarray &cfgline);
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| 86 | bool init (ostream &logout);
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| 87 | text_t get_filter_name () {return "QueryFilter";}
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| 88 | void filter (const FilterRequest_t &request,
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| 89 | FilterResponse_t &response,
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| 90 | comerror_t &err, ostream &logout);
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| 91 | };
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| 92 |
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| 93 |
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| 94 | #endif
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