[219] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * source.cpp --
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| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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| 5 | *
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[534] | 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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[219] | 9 | *
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[534] | 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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[219] | 24 | *********************************************************************/
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| 25 |
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| 26 | #include "source.h"
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[31388] | 27 | #include "colservertools.h"
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[15591] | 28 | #include "fileutil.h"
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| 29 | #include "OIDtools.h"
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[219] | 30 | #include <assert.h>
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| 31 |
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| 32 |
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[15591] | 33 | sourceclass::sourceclass ()
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| 34 | {
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| 35 | db_ptr = NULL;
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[31387] | 36 | oaidb_ptr = NULL;
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[15591] | 37 | textsearchptr = NULL;
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| 38 | classname = "source";
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[219] | 39 | }
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| 40 |
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[15591] | 41 | sourceclass::~sourceclass ()
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| 42 | {
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| 43 | if (db_ptr != NULL) delete db_ptr;
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| 44 | if (textsearchptr != NULL) delete textsearchptr;
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[31387] | 45 |
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| 46 | // http://stackoverflow.com/questions/677620/do-i-need-to-explicitly-call-the-base-virtual-destructor
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| 47 | // Answer: "No, destructors are called automatically [by the derived destructor] in the reverse
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| 48 | // order of construction. (Base classes last). Do not call base class destructors."
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| 49 | // The link also explains why the destructors should be declared as virtual in the header files.
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| 50 |
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| 51 | // now delete the oaidb object pointed to by the oaidb_ptr too
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| 52 | if (oaidb_ptr != NULL) delete oaidb_ptr;
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| 53 | oaidb_ptr = NULL;
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[219] | 54 | }
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| 55 |
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| 56 | // configure should be called once for each configuration line
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[15591] | 57 | void sourceclass::configure (const text_t &key, const text_tarray &cfgline)
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| 58 | {
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| 59 | if (cfgline.size() >= 1) {
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| 60 | const text_t &value = cfgline[0];
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| 61 |
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| 62 | if (key == "collection") collection = value;
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| 63 | else if (key == "collectdir") collectdir = value;
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| 64 | else if (key == "gsdlhome") gsdlhome = value;
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[16310] | 65 | else if (key == "collecthome") collecthome = value;
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[15591] | 66 | else if (key == "gdbmhome") dbhome = value;
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| 67 | }
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| 68 |
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| 69 | if (key == "indexmap") {
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| 70 | indexmap.importmap (cfgline);
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| 71 |
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| 72 | } else if (key == "defaultindex") {
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| 73 | indexmap.from2to (cfgline[0], defaultindex);
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| 74 |
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| 75 | } else if (key == "subcollectionmap") {
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| 76 | subcollectionmap.importmap (cfgline);
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| 77 |
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| 78 | } else if (key == "defaultsubcollection") {
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| 79 | subcollectionmap.from2to (cfgline[0], defaultsubcollection);
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| 80 |
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| 81 | } else if (key == "languagemap") {
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| 82 | languagemap.importmap (cfgline);
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| 83 |
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| 84 | } else if (key == "defaultlanguage") {
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| 85 | languagemap.from2to (cfgline[0], defaultlanguage);
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| 86 | } else if (key == "indexstem") {
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| 87 | indexstem = cfgline[0];
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| 88 | }
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[219] | 89 | }
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| 90 |
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[31387] | 91 |
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[219] | 92 | // init should be called after all the configuration is done but
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| 93 | // before any other methods are called
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[15591] | 94 | bool sourceclass::init (ostream &logout)
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| 95 | {
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| 96 | outconvertclass text_t2ascii;
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| 97 |
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[16310] | 98 | if (collecthome.empty()) collecthome = filename_cat(gsdlhome,"collect");
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[15591] | 99 | if (dbhome.empty()) dbhome = gsdlhome;
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| 100 |
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| 101 | if (defaultindex.empty()) {
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| 102 | // use first index in map as default if no default is set explicitly
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| 103 | text_tarray toarray;
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| 104 | indexmap.gettoarray(toarray);
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| 105 | if (toarray.size()) {
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| 106 | defaultindex = toarray[0];
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| 107 | }
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| 108 | }
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| 109 |
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| 110 | if (defaultsubcollection.empty()) {
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| 111 | // use first subcollection in map as default if no default is set explicitly
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| 112 | text_tarray toarray;
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| 113 | subcollectionmap.gettoarray(toarray);
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| 114 | if (toarray.size()) {
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| 115 | defaultsubcollection = toarray[0];
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| 116 | }
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| 117 | }
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| 118 |
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| 119 | if (defaultlanguage.empty()) {
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| 120 | // use first language in map as default if no default is set explicitly
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| 121 | text_tarray toarray;
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| 122 | languagemap.gettoarray(toarray);
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| 123 | if (toarray.size()) {
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| 124 | defaultlanguage = toarray[0];
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | // get the collection directory name
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| 129 | if (collectdir.empty()) {
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[16310] | 130 | collectdir = filename_cat (collecthome, collection);
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[15591] | 131 | }
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[15680] | 132 |
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| 133 | if (db_ptr == NULL) {
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| 134 | // most likely a configuration problem
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| 135 | logout << text_t2ascii
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| 136 | << "configuration error: queryfilter contains a null dbclass\n\n";
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| 137 | return false;
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| 138 | }
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| 139 |
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[15591] | 140 | // get the filename for the database and make sure it exists
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| 141 | if (indexstem.empty()) {
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| 142 | indexstem = collection;
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| 143 | }
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[31388] | 144 | db_filename = resolve_db_filename(gsdlhome, dbhome, collecthome, collection,
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| 145 | indexstem, db_ptr->getfileextension());
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[15591] | 146 | if (!file_exists(db_filename)) {
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| 147 | logout << text_t2ascii
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| 148 | << "warning: database \"" << db_filename << "\" does not exist\n\n";
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| 149 | // return false;
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| 150 | }
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| 151 |
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[31388] | 152 | oaidb_filename = resolve_oaidb_filename(gsdlhome, dbhome, collecthome, collection,
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| 153 | oaidb_ptr->getfileextension());
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[31387] | 154 |
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[219] | 155 | return true;
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| 156 | }
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| 157 |
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[249] | 158 |
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| 159 | // translate_OID translates OIDs using ".pr", ."fc" etc.
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[15591] | 160 | bool sourceclass::translate_OID (const text_t &OIDin, text_t &OIDout,
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| 161 | comerror_t &err, ostream &logout)
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| 162 | {
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| 163 | outconvertclass text_t2ascii;
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| 164 |
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[249] | 165 | err = noError;
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[15591] | 166 | if (db_ptr == NULL) {
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| 167 | // most likely a configuration problem
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| 168 | logout << text_t2ascii
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| 169 | << "configuration error: " << classname << " contains a null dbclass\n\n";
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| 170 | err = configurationError;
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| 171 | return true;
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| 172 | }
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[249] | 173 |
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[15591] | 174 | // open the database
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| 175 | db_ptr->setlogout(&logout);
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| 176 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
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| 177 | // most likely a system problem (we have already checked that the database exists)
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| 178 | logout << text_t2ascii
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| 179 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
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| 180 | err = systemProblem;
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| 181 | return true;
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| 182 | }
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| 183 |
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| 184 | infodbclass info;
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| 185 | OIDout = db_ptr->translate_OID (OIDin, info);
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| 186 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
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| 187 | return true;
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[249] | 188 | }
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| 189 |
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[31387] | 190 | // get_oai_metadata fills out the oai metadata from oaidb if possible
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| 191 | // if it is not responsible for the given OID then it will return false.
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| 192 | bool sourceclass::get_oai_metadata (const text_t &requestParams, const text_t &refParams,
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| 193 | bool getParents, const text_tset &fields,
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| 194 | const text_t &OID, text_t &deleted_status, MetadataInfo_tmap &metadata,
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| 195 | comerror_t &err, ostream &logout)
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| 196 | {
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| 197 | outconvertclass text_t2ascii;
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| 198 | metadata.erase(metadata.begin(), metadata.end());
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| 199 | err = noError;
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[249] | 200 |
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[31387] | 201 | //logout << text_t2ascii << "sourceclass::get_oai_meta for OID: " << OID << "\n";
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| 202 |
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| 203 | // ONLY if we're doing any OAI stuff (FROAI will be set then) will we even be in here
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| 204 | // So next try to open the oai-inf db if it exists for this collection
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| 205 | if (!file_exists(oaidb_filename)) { // if the oaidb file doesn't even exist, let's not bother with oaidb
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| 206 |
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| 207 | logout << text_t2ascii
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| 208 | << "warning: collection's oai-inf database \"" << oaidb_filename << "\" does not exist\n\n";
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| 209 | return false;
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| 210 |
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| 211 | } else { // let's try opening the oaidb file
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| 212 | oaidb_ptr->setlogout(&logout);
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| 213 | if (!oaidb_ptr->opendatabase (oaidb_filename, DB_READER, 100, false)) {
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| 214 | // most likely a system problem (we have already checked that the database exists just above)
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| 215 | logout << text_t2ascii
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| 216 | << "system problem: open on database \""
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| 217 | << oaidb_filename << "\" failed\n\n";
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| 218 | err = systemProblem;
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| 219 | return false;
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| 220 | } // now we've opened the oai-inf db file successfully
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| 221 | }
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| 222 |
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| 223 | // get the metadata (deleted status, timestamp, datestamp) for OID, and pushback onto the metadata array
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| 224 | infodbclass oai_info;
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| 225 | if (!oaidb_ptr->getinfo(OID, oai_info)) { // OID not found in oai_inf db
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| 226 | logout << text_t2ascii
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| 227 | << "warning: lookup for OID \"" << OID
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| 228 | << "\" in etc/oai-inf db failed when getting metadata (in sourceclass source.cpp).\n\n";
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| 229 |
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| 230 | return false;
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| 231 | } else {
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| 232 | //logout << text_t2ascii << "@@@@ getting metadata for OID \"" << OID << "\" from etc/oai-inf db.\n\n";
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| 233 | //logout << text_t2ascii << "@@@@ timestamp: " << oai_info["timestamp"] << "\n\n";
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| 234 |
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| 235 | metadata["oaiinf.status"].isRef = false;
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| 236 | metadata["oaiinf.status"].values.push_back(oai_info["status"]);
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| 237 | metadata["oaiinf.timestamp"].isRef = false;
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| 238 | metadata["oaiinf.timestamp"].values.push_back(oai_info["timestamp"]);
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| 239 | metadata["oaiinf.datestamp"].isRef = false;
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| 240 | metadata["oaiinf.datestamp"].values.push_back(oai_info["datestamp"]);
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[31389] | 241 |
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| 242 | deleted_status = oai_info["status"];
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[31387] | 243 | }
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| 244 |
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| 245 | // we're done with oai-inf db
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| 246 |
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| 247 | oaidb_ptr->closedatabase(); // don't leave files open
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| 248 |
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| 249 | return true;
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| 250 | }
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| 251 |
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| 252 |
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[21772] | 253 | // get_metadata fills out the metadata if possible, if it is not responsible
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[226] | 254 | // for the given OID then it will return false.
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[15591] | 255 | bool sourceclass::get_metadata (const text_t &requestParams, const text_t &refParams,
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| 256 | bool getParents, const text_tset &fields,
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| 257 | const text_t &OID, MetadataInfo_tmap &metadata,
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[31387] | 258 | comerror_t &err, ostream &logout, bool append)
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[15591] | 259 | {
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| 260 | outconvertclass text_t2ascii;
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| 261 |
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[31387] | 262 | if(!append) {
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| 263 | metadata.erase(metadata.begin(), metadata.end());
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| 264 | }
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[15591] | 265 |
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[226] | 266 | err = noError;
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[15591] | 267 | if (db_ptr == NULL) {
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| 268 | // most likely a configuration problem
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| 269 | logout << text_t2ascii
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| 270 | << "configuration error: " << classname <<" contains a null dbclass\n\n";
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| 271 | err = configurationError;
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| 272 | return true;
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| 273 | }
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[219] | 274 |
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[15591] | 275 | // open the database
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| 276 | db_ptr->setlogout(&logout);
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| 277 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
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| 278 | // most likely a system problem (we have already checked that the database exists)
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| 279 | logout << text_t2ascii
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| 280 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
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| 281 | err = systemProblem;
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| 282 | return true;
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| 283 | }
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| 284 |
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| 285 | // get the metadata - if getParents is set we need to get
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| 286 | // info for all parents of OID as well as OID
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| 287 | vector<infodbclass> info_array;
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| 288 | text_tarray OIDs;
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| 289 | if (getParents) get_parents_array (OID, OIDs);
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| 290 | OIDs.push_back (OID);
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| 291 |
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| 292 | text_tarray::const_iterator this_OID = OIDs.begin();
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| 293 | text_tarray::const_iterator end_OID = OIDs.end();
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| 294 |
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| 295 | while (this_OID != end_OID) {
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| 296 | infodbclass info;
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| 297 | if (!db_ptr->getinfo(*this_OID, info)) return false;
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| 298 |
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| 299 | // adjust the metadata
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| 300 | text_t &contains = info["contains"];
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| 301 | if (contains.empty()) info["haschildren"] = 0;
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| 302 | else info["haschildren"] = 1;
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| 303 | //contains.clear();
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| 304 |
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| 305 | info_array.push_back(info);
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| 306 | ++this_OID;
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| 307 | }
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| 308 |
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| 309 | // if fields set is empty we want to get all available metadata
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| 310 | text_tset tfields = fields;
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| 311 | if (tfields.empty() && !info_array.empty()) {
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| 312 | infodbclass::iterator t_info = info_array[0].begin();
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| 313 | infodbclass::iterator e_info = info_array[0].end();
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| 314 | while (t_info != e_info) {
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| 315 | if ((*t_info).first != "contains")
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| 316 | tfields.insert ((*t_info).first);
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| 317 | ++t_info;
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| 318 | }
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| 319 | tfields.insert ("hasnext");
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| 320 | tfields.insert ("hasprevious");
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| 321 | }
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| 322 |
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| 323 | // collect together the metadata
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| 324 | bool donenextprevtest = false;
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| 325 | bool hasnext=false, hasprevious=false;
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| 326 | MetadataInfo_t this_metadata;
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| 327 | text_tarray *pos_metadata;
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| 328 | text_tset::const_iterator fields_here = tfields.begin();
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| 329 | text_tset::const_iterator fields_end = tfields.end();
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| 330 |
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| 331 | while (fields_here != fields_end) {
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| 332 | this_metadata.clear();
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| 333 | this_metadata.isRef = false;
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| 334 |
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| 335 | vector<infodbclass>::reverse_iterator this_info = info_array.rbegin();
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| 336 | vector<infodbclass>::reverse_iterator end_info = info_array.rend();
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| 337 | MetadataInfo_t *tmetaptr = &this_metadata;
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| 338 | while (this_info != end_info) {
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| 339 |
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| 340 | pos_metadata = (*this_info).getmultinfo(*fields_here);
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| 341 | if ((*fields_here == "hasnext" || *fields_here == "hasprevious")) {
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| 342 |
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| 343 | // collect metadata
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| 344 | if (!donenextprevtest) {
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| 345 | donenextprevtest = true;
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| 346 |
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| 347 | // cache parent contents array
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| 348 | text_t thisparent = get_parent (OID);
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| 349 | if (!thisparent.empty()) {
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| 350 | if (thisparent != parentOID) {
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| 351 | parentOID = thisparent;
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| 352 | parentcontents.erase(parentcontents.begin(), parentcontents.end());
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| 353 | if (db_ptr->getinfo(parentOID, parentinfo)) {
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| 354 | text_t &parentinfocontains = parentinfo["contains"];
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| 355 | if (!parentinfocontains.empty())
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| 356 | splitchar (parentinfocontains.begin(), parentinfocontains.end(),
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| 357 | ';', parentcontents);
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| 358 | }
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| 359 | }
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| 360 |
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| 361 | // do tests
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| 362 | text_tarray::const_iterator parentcontents_here = parentcontents.begin();
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| 363 | text_tarray::const_iterator parentcontents_end = parentcontents.end();
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| 364 | text_t shrunk_OID = OID;
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| 365 | shrink_parent (shrunk_OID);
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| 366 | while (parentcontents_here != parentcontents_end) {
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| 367 | if (*parentcontents_here == shrunk_OID) {
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| 368 | if (parentcontents_here == parentcontents.begin()) hasprevious = false;
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| 369 | else hasprevious = true;
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| 370 |
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| 371 | ++parentcontents_here;
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| 372 |
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| 373 | if (parentcontents_here == parentcontents.end()) hasnext = false;
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| 374 | else hasnext = true;
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| 375 |
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| 376 | break;
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| 377 | }
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| 378 |
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| 379 | ++parentcontents_here;
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| 380 | }
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| 381 |
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| 382 | // fill in metadata
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| 383 | if ((*fields_here == "hasnext" && hasnext) ||
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| 384 | (*fields_here == "hasprevious" && hasprevious))
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| 385 | tmetaptr->values.push_back("1");
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| 386 | else
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| 387 | tmetaptr->values.push_back("0");
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| 388 | } else
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| 389 | tmetaptr->values.push_back("0");
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| 390 | }
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| 391 | }
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| 392 | //else if (pos_metadata != NULL && *fields_here != "contains") {
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| 393 | else if (pos_metadata != NULL) {
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| 394 | tmetaptr->values = *pos_metadata;
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| 395 | }
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| 396 | else
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| 397 | tmetaptr->values.push_back("");
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| 398 |
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| 399 | ++this_info;
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| 400 | if (this_info != end_info) {
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| 401 | tmetaptr->parent = new MetadataInfo_t();
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| 402 | tmetaptr = tmetaptr->parent;
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| 403 | }
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| 404 | }
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| 405 | metadata[*fields_here] = this_metadata;
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| 406 | ++fields_here;
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| 407 | }
|
---|
| 408 |
|
---|
| 409 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
| 410 | return true;
|
---|
[226] | 411 | }
|
---|
[219] | 412 |
|
---|
[15591] | 413 | bool sourceclass::get_document (const text_t &OID, text_t &doc,
|
---|
| 414 | comerror_t &err, ostream &logout)
|
---|
| 415 | {
|
---|
| 416 | outconvertclass text_t2ascii;
|
---|
| 417 |
|
---|
[259] | 418 | err = noError;
|
---|
[15591] | 419 | if (db_ptr == NULL) {
|
---|
| 420 | // most likely a configuration problem
|
---|
| 421 | logout << text_t2ascii
|
---|
| 422 | << "configuration error: " << classname << " contains a null dbclass\n\n";
|
---|
| 423 | err = configurationError;
|
---|
| 424 | return true;
|
---|
| 425 | }
|
---|
[219] | 426 |
|
---|
[15591] | 427 | // open the database
|
---|
| 428 | db_ptr->setlogout(&logout);
|
---|
| 429 | if (!db_ptr->opendatabase (db_filename, DB_READER, 100, false)) {
|
---|
| 430 | // most likely a system problem (we have already checked that the database exists)
|
---|
| 431 | logout << text_t2ascii
|
---|
| 432 | << "system problem: open on database \"" << db_filename << "\" failed\n\n";
|
---|
| 433 | err = systemProblem;
|
---|
| 434 | return true;
|
---|
| 435 | }
|
---|
| 436 |
|
---|
| 437 | text_t tOID = OID;
|
---|
| 438 | if (needs_translating (OID))
|
---|
| 439 | translate_OID (OID, tOID, err, logout);
|
---|
| 440 | infodbclass info;
|
---|
| 441 | if (!db_ptr->getinfo(tOID, info)) {
|
---|
| 442 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
| 443 | return false;
|
---|
| 444 | }
|
---|
| 445 |
|
---|
| 446 | if (info["hastxt"].getint() == 1) {
|
---|
| 447 | int docnum = info["docnum"].getint();
|
---|
| 448 |
|
---|
| 449 | // set the collection directory
|
---|
| 450 | textsearchptr->setcollectdir (collectdir);
|
---|
| 451 |
|
---|
| 452 | // get the text
|
---|
| 453 | textsearchptr->docTargetDocument(defaultindex, defaultsubcollection,
|
---|
[21772] | 454 | defaultlanguage, collection, docnum, doc);
|
---|
| 455 |
|
---|
| 456 | // remove the <Doc></Doc> and <Sec></Sec> tags
|
---|
| 457 | doc.replace("<Doc>", "");
|
---|
| 458 | doc.replace("</Doc>", "");
|
---|
| 459 | doc.replace("<Sec>", "");
|
---|
| 460 | doc.replace("</Sec>", "");
|
---|
[15591] | 461 | }
|
---|
| 462 |
|
---|
| 463 | db_ptr->closedatabase(); // Important that local library doesn't leave any files open
|
---|
| 464 | return true;
|
---|
[259] | 465 | }
|
---|
[226] | 466 |
|
---|
[15591] | 467 | bool sourceclass::is_searchable(bool &issearchable, comerror_t &err, ostream &logout)
|
---|
| 468 | {
|
---|
| 469 | err = noError;
|
---|
| 470 | issearchable = false;
|
---|
[259] | 471 |
|
---|
[15591] | 472 | text_tarray fromarray;
|
---|
| 473 | indexmap.getfromarray(fromarray);
|
---|
| 474 | if (fromarray.size() == 0) {
|
---|
| 475 | return true;
|
---|
| 476 | } else if (fromarray.size() == 1) {
|
---|
| 477 | if (fromarray[0] == "dummy:text") {
|
---|
| 478 | // always return true - issearchable is false here though
|
---|
| 479 | return true;
|
---|
| 480 | }
|
---|
| 481 | }
|
---|
[4774] | 482 | issearchable = true;
|
---|
[15591] | 483 | return true;
|
---|
[4774] | 484 | }
|
---|
| 485 |
|
---|
[15591] | 486 |
|
---|
[504] | 487 | bool operator==(const sourceptr &x, const sourceptr &y) {
|
---|
| 488 | return (x.s == y.s);
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 | bool operator<(const sourceptr &x, const sourceptr &y) {
|
---|
| 492 | return (x.s < y.s);
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 |
|
---|
[219] | 496 | // thesource remains the property of the calling code but
|
---|
| 497 | // should not be deleted until it is removed from this list.
|
---|
| 498 | void sourcelistclass::addsource (sourceclass *thesource) {
|
---|
[226] | 499 | // can't add a source that doesn't exist
|
---|
[219] | 500 | assert (thesource != NULL);
|
---|
| 501 | if (thesource == NULL) return;
|
---|
| 502 |
|
---|
| 503 | sourceptr sp;
|
---|
| 504 | sp.s = thesource;
|
---|
| 505 |
|
---|
| 506 | sourceptrs.push_back(sp);
|
---|
| 507 | }
|
---|