[8027] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * lucenesearch.cpp --
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| 4 | * Copyright (C) 1999-2002 The New Zealand Digital Library Project
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| 5 | *
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| 6 | * A component of the Greenstone digital library software
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| 7 | * from the New Zealand Digital Library Project at the
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| 8 | * University of Waikato, New Zealand.
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| 9 | *
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| 10 | * This program is free software; you can redistribute it and/or modify
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| 11 | * it under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; either version 2 of the License, or
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| 13 | * (at your option) any later version.
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| 14 | *
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| 15 | * This program is distributed in the hope that it will be useful,
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | * GNU General Public License for more details.
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| 19 | *
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| 20 | * You should have received a copy of the GNU General Public License
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| 21 | * along with this program; if not, write to the Free Software
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| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | *
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| 24 | *********************************************************************/
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| 25 |
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| 26 |
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| 27 | #if defined(GSDL_USE_OBJECTSPACE)
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| 28 | # include <ospace\std\iostream>
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| 29 | #elif defined(GSDL_USE_IOS_H)
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| 30 | # include <iostream.h>
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| 31 | #else
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| 32 | # include <iostream>
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| 33 | #endif
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| 34 |
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[9031] | 35 | #include <stdio.h>
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[9210] | 36 | #include <time.h>
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[8027] | 37 |
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| 38 | #include "gsdlconf.h"
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[9218] | 39 | #include "gsdltools.h"
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[8027] | 40 | #include "lucenesearch.h"
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| 41 | #include "fileutil.h"
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| 42 | #include "queryinfo.h"
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| 43 | #include "gsdlunicode.h"
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| 44 |
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[9031] | 45 | #include "expat_resultset.h"
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[8027] | 46 |
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[9937] | 47 | text_t lucenesearchclass::getindexsuffix(const queryparamclass &qp) {
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[8027] | 48 | text_t indexsuffix = "index";
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[9089] | 49 | // get the first char of the level to be the start of the index name
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| 50 | text_t suffix = substr(qp.level.begin(), qp.level.begin()+1);
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| 51 | lc(suffix);
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[8027] | 52 | text_t ind = qp.index;
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| 53 | text_t sub = qp.subcollection;
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| 54 | text_t lang = qp.language;
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| 55 |
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| 56 | // collection name not added for Lucene
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[9089] | 57 | indexsuffix = filename_cat(indexsuffix, suffix +ind + sub + lang);
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[8027] | 58 | return indexsuffix;
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| 59 |
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| 60 | }
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| 61 |
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| 62 | ////////////////////
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| 63 | // lucenesearch class //
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| 64 | ////////////////////
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| 65 |
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| 66 | lucenesearchclass::lucenesearchclass ()
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| 67 | : searchclass() {
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| 68 |
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[15594] | 69 | textlevel = "Doc";
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[8027] | 70 | }
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| 71 |
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| 72 | lucenesearchclass::~lucenesearchclass ()
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| 73 | {
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| 74 | if (cache != NULL)
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| 75 | {
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| 76 | delete cache;
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| 77 | cache = NULL;
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| 78 | }
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| 79 | }
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| 80 |
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[15594] | 81 | void lucenesearchclass::set_text_level(const text_t &textlevel_arg)
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| 82 | {
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| 83 | textlevel = textlevel_arg;
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[8027] | 84 | }
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| 85 |
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[16310] | 86 |
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[8027] | 87 | bool lucenesearchclass::search(const queryparamclass &queryparams,
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| 88 | queryresultsclass &queryresult) {
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| 89 |
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| 90 | #ifdef __WIN32__
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| 91 | char basepath[]="";
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| 92 | #else
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| 93 | char basepath[] = "/";
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| 94 | #endif
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| 95 |
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| 96 | char *indexname = (filename_cat(collectdir, getindexsuffix(queryparams))).getcstr();
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| 97 |
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| 98 | // set default stem method from values originally set on prefs page
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| 99 | int defaultStemMethod = 0;
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| 100 | if (queryparams.casefolding) {
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| 101 | defaultStemMethod |= 1;
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| 102 | }
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| 103 | if (queryparams.stemming) {
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| 104 | defaultStemMethod |= 2;
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| 105 | }
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[12388] | 106 |
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[10412] | 107 | text_t utf8querystring = to_utf8(queryparams.querystring);
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| 108 |
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| 109 | text_t escaped_utf8querystring = "";
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| 110 | text_t::const_iterator here = utf8querystring.begin();
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| 111 | while (here != utf8querystring.end()) {
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| 112 | if (*here == '"') escaped_utf8querystring.push_back('\\');
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| 113 | escaped_utf8querystring.push_back(*here);
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[12276] | 114 | ++here;
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[10412] | 115 | }
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[8027] | 116 |
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[12992] | 117 | // Use this to skip lucene_query.pl and access GS2LuceneQuery directly (Java must be on path)
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[15049] | 118 | // text_t cmd = "java -classpath \"" + filename_cat(gsdlhome, "bin", "java", "LuceneWrapper.jar") + "\" org.greenstone.LuceneWrapper.GS2LuceneQuery ";
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[12246] | 119 | text_t cmd = "\"" + filename_cat(gsdlhome, "bin", "script", "lucene_query.pl") + "\"";
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[10412] | 120 | cmd += (text_t)" \""+indexname + (text_t)"\" \"" + escaped_utf8querystring + (text_t)"\"";
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[12410] | 121 |
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| 122 | if (!queryparams.filterstring.empty()) {
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| 123 | cmd += " -filter \"" + queryparams.filterstring + "\"";
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| 124 | }
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[12276] | 125 | if (!queryparams.sortfield.empty()) {
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[12364] | 126 | cmd += " -sort \"" + queryparams.sortfield + "\"";
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[12276] | 127 | }
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[12770] | 128 | if (!queryparams.fuzziness.empty()) {
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| 129 | cmd += " -fuzziness " + queryparams.fuzziness;
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| 130 | }
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[12364] | 131 |
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| 132 | // New code to support configuration of the default conjuction operator
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| 133 | // set default Boolean combiner from all/some setting
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| 134 | // if match_mode == 1, ie all, default=1 ie AND
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| 135 | // if match_mode == 0, ie some, default=0, ie OR
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| 136 | if (queryparams.match_mode)
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| 137 | {
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| 138 | cmd += " -dco AND";
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| 139 | }
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| 140 |
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[12655] | 141 | // New code to allow Lucene to do paging of search results. This should
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| 142 | // substantially improve performance as we don't have to return all 12000
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| 143 | // hits if we only need the first 20!
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| 144 | if (queryparams.startresults && queryparams.endresults)
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| 145 | {
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| 146 | cmd += (text_t)" -startresults " + queryparams.startresults;
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| 147 | cmd += (text_t)" -endresults " + queryparams.endresults;
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| 148 | }
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| 149 |
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[9210] | 150 | text_t xml_text = "";
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[8027] | 151 |
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[12246] | 152 | // I don't want to do this, but I have to.
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| 153 | text_t gsdlhome_env = "GSDLHOME=" + gsdlhome;
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| 154 | putenv(gsdlhome_env.getcstr());
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| 155 |
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[9115] | 156 | #ifdef __WIN32__
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[12246] | 157 | putenv("GSDLOS=windows");
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| 158 |
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[9210] | 159 | //FILE *PIN = _popen(cmd.getcstr(), "r"); // didn't seem to work
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[9218] | 160 | cmd = (text_t)"perl -S "+cmd;
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| 161 | // we write the result to a file
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[9210] | 162 | clock_t this_time = clock();
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| 163 | text_t filename = "luc";
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| 164 | filename.append(this_time);
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| 165 | filename.append(".txt");
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[9218] | 166 |
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[9210] | 167 | text_t out_file = filename_cat(collectdir, filename);
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[12374] | 168 | cmd += " -out \"" + out_file + "\"";
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[9218] | 169 | int rv = gsdl_system(cmd, true, cerr);
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| 170 | if (rv != 0) {
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| 171 | cerr << "tried to run command \""<<cmd<<"\", but it failed\n";
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| 172 | } else {
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| 173 | read_file(out_file, xml_text);
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| 174 | remove(out_file.getcstr()); // now delete it
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| 175 | }
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[9115] | 176 | #else
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[12246] | 177 | putenv("GSDLOS=linux");
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| 178 |
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[9115] | 179 | FILE *PIN = popen(cmd.getcstr(), "r");
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[9210] | 180 |
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[8027] | 181 | if (PIN==NULL) {
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[9210] | 182 | perror("PIPE");
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[8027] | 183 | cerr << "Error: unable to open pipe to " << cmd << endl;
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[9210] | 184 |
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[8027] | 185 | return false;
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| 186 | }
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| 187 | while (!feof(PIN)) {
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| 188 | char buffer[256];
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| 189 | int num_bytes = fread(buffer,1,256,PIN);
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| 190 | xml_text.appendcarr(buffer,num_bytes);
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| 191 | }
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| 192 |
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[9210] | 193 | #endif
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[12246] | 194 |
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[9031] | 195 | expat_resultset(xml_text,queryresult);
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[9218] | 196 |
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[9115] | 197 | #ifdef __WIN32__
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[9210] | 198 | // _pclose(PIN);
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[9115] | 199 | #else
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[8027] | 200 | pclose(PIN);
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[9115] | 201 | #endif
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[8027] | 202 |
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| 203 | return true;
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[9218] | 204 | }
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[8027] | 205 |
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| 206 |
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| 207 | bool lucenesearchclass::browse_search(const queryparamclass &queryparams,
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| 208 | int start, int numDocs,
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| 209 | queryresultsclass &queryresult) {
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| 210 |
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| 211 | cerr << "**** Not sure what this function does!" << endl;
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| 212 | return false;
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| 213 | }
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| 214 |
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| 215 | // the document text for 'docnum' is placed in 'output'
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| 216 | // docTargetDocument returns 'true' if it was able to
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| 217 | // try to get a document
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| 218 | // collection is needed to see if an index from the
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| 219 | // collection is loaded. THe default index bits are just there cos
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| 220 | // the mg version needs them
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| 221 |
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| 222 | bool lucenesearchclass::docTargetDocument(const text_t &/*defaultindex*/,
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| 223 | const text_t &/*defaultsubcollection*/,
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| 224 | const text_t &/*defaultlanguage*/,
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| 225 | const text_t &collection,
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| 226 | int docnum,
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| 227 | text_t &output) {
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| 228 |
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[15594] | 229 | // we now get the document directly by lucenesource, so don't use this
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[9915] | 230 | // method
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[8027] | 231 | return false;
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| 232 | }
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| 233 |
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| 234 | // used to clear any cached databases for persistent versions of
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| 235 | // Greenstone like the Windows local library
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| 236 | void lucenesearchclass::unload_database () {
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| 237 | }
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| 238 |
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[12246] | 239 | void lucenesearchclass::set_gsdlhome (const text_t &gh)
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| 240 | {
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| 241 | gsdlhome = gh;
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| 242 | }
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