[22049] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * sqlfilter.cpp --
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| 4 | * Copyright (C) 2008 DL Consulting Ltd
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| 5 | * Copyright (C) 2010 The New Zealand Digital Library Project
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| 6 | *
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| 7 | * A component of the Greenstone digital library software
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| 8 | * from the New Zealand Digital Library Project at the
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| 9 | * University of Waikato, New Zealand.
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| 10 | *
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| 11 | * This program is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * This program is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with this program; if not, write to the Free Software
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| 23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 24 | *
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| 25 | *********************************************************************/
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| 26 |
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| 27 | #include "fileutil.h"
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| 28 | #include "sqlfilter.h"
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| 29 |
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| 30 |
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| 31 | sqlfilterclass::sqlfilterclass ()
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| 32 | : filterclass()
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| 33 | {}
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| 34 |
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| 35 |
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| 36 | sqlfilterclass::~sqlfilterclass ()
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| 37 | {}
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| 38 |
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| 39 |
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| 40 | void sqlfilterclass::configure (const text_t &key, const text_tarray &cfgline)
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| 41 | {
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| 42 | filterclass::configure (key, cfgline);
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| 43 |
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| 44 | if (key == "indexstem")
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| 45 | {
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| 46 | indexstem = cfgline[0];
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| 47 | }
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| 48 | }
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| 49 |
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| 50 | bool sqlfilterclass::init (ostream &logout)
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| 51 | {
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| 52 | outconvertclass text_t2ascii;
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| 53 |
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| 54 | if (!filterclass::init(logout)) return false;
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| 55 |
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| 56 | if (sql_db_ptr == NULL)
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| 57 | {
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| 58 | // most likely a configuration problem
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| 59 | logout << text_t2ascii << "configuration error: sqlfilter contains a null sqldbclass\n\n";
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| 60 | return false;
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| 61 | }
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| 62 |
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| 63 | if (indexstem.empty())
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| 64 | {
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| 65 | indexstem = collection;
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| 66 | }
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| 67 |
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| 68 | // get the filename for the database and make sure it exists
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| 69 | sql_db_filename = resolve_db_filename(indexstem,sql_db_ptr->getfileextension());
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| 70 | if (!file_exists(sql_db_filename))
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| 71 | {
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| 72 | logout << text_t2ascii << "warning: database \"" << sql_db_filename << "\" does not exist\n\n";
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| 73 | return false;
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| 74 | }
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| 75 |
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| 76 | return true;
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| 77 | }
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| 78 |
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| 79 |
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| 80 | bool sqlfilterclass::connect_to_sqldb (FilterResponse_t &response,
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| 81 | comerror_t &err, ostream &logout)
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| 82 | {
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| 83 | outconvertclass text_t2ascii;
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| 84 |
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| 85 | response.clear();
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| 86 | err = noError;
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| 87 |
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| 88 | if (sql_db_ptr == NULL) {
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| 89 | // most likely a configuration problem
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| 90 | logout << text_t2ascii << "configuration error: sqlbrowsefilter contains a null sqldbclass\n\n";
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| 91 | err = configurationError;
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| 92 | return false;
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| 93 | }
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| 94 |
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| 95 | // open the database
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| 96 | sql_db_ptr->setlogout (&logout);
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| 97 | if (!sql_db_ptr->opendatabase (sql_db_filename, DB_READER, 100, false)) {
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| 98 | // most likely a system problem (we have already checked that the database exists)
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| 99 | logout << text_t2ascii << "system problem: open on database \"" << sql_db_filename << "\" failed\n\n";
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| 100 | err = systemProblem;
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| 101 | return false;
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| 102 | }
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| 103 |
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| 104 | return true;
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| 105 | }
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| 106 |
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| 107 |
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| 108 | void sqlfilterclass::disconnect_from_sqldb ()
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| 109 | {
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| 110 | sql_db_ptr->closedatabase(); // Important that local library doesn't leave any files open
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| 111 | }
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