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110 lines
2.4 KiB
110 lines
2.4 KiB
3 years ago
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//
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// WordSearcher.cc
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//
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// WordSearcher: a simple word database readonly-access wrapper
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// generates ResultLists for the Query framework.
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//
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// Part of the ht://Dig package <http://www.htdig.org/>
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// Copyright (c) 1995-2004 The ht://Dig Group
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// For copyright details, see the file COPYING in your distribution
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// or the GNU Library General Public License (LGPL) version 2 or later
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// <http://www.gnu.org/copyleft/lgpl.html>
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//
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// $Id: WordSearcher.cc,v 1.4 2004/05/28 13:15:24 lha Exp $
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//
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#include "WordSearcher.h"
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#include "WordType.h"
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#include "ResultList.h"
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#include "HtWordReference.h"
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#include "defaults.h"
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extern int debug;
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//
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// constructor, opens the database
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//
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WordSearcher::WordSearcher(const String &filename) :
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references(*(HtConfiguration::config()))
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{
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references.Open(filename, O_RDONLY);
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}
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//
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// gather results for a word, either from db or ignored
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//
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ResultList *
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WordSearcher::Search(const String &word)
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{
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ResultList *result = 0;
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if(IsIgnore(word))
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{
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if(debug) cerr << "IGNORE: " << word << endl;
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result = new ResultList;
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result->Ignore();
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}
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else
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{
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result = Fetch(word);
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}
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return result;
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}
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//
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// see if word must be ignored
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//
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bool
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WordSearcher::IsIgnore(const String &word)
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{
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HtConfiguration* config= HtConfiguration::config();
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String copy = word;
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WordType type(*config);
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return 0 != type.Normalize(copy);
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}
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//
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// gather all references in the db, construct a ResultList
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//
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ResultList *
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WordSearcher::Fetch(const String &word)
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{
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if(debug) cerr << "FETCH: " << word << endl;
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ResultList *result = 0;
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List *refs = references[word];
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if(refs && refs->Count())
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{
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if(debug) cerr << "REFERENCES: " << refs->Count() << endl;
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result = new ResultList;
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DocMatch *match = new DocMatch;
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refs->Start_Get();
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HtWordReference *ref = (HtWordReference *)refs->Get_Next();
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match->SetId(ref->DocID());
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match->SetAnchor(ref->Anchor());
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result->add(match);
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unsigned int current = ref->DocID();
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if(debug) cerr << "At: " << ref->DocID() << endl;
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while(ref)
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{
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if(ref->DocID() != current)
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{
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if(debug) cerr << "At: "<<ref->DocID()<< endl;
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match = new DocMatch;
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match->SetId(ref->DocID());
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match->SetAnchor(ref->Anchor());
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result->add(match);
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current = ref->DocID();
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}
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if(debug) cerr << "@ "<<ref->Location()<< endl;
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match->AddLocation(
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new Location(
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ref->Location(),
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ref->Location(),
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ref->Flags()));
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ref = (HtWordReference *)refs->Get_Next();
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}
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}
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return result;
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}
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