1 | /**********************************************************************
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2 | *
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3 | * sqlitedbclass.h --
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4 | * Copyright (C) 2008 DL Consulting Ltd
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5 | * Copyright (C) 2010 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 | #ifndef SQLITEDBCLASS_H
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28 | #define SQLITEDBCLASS_H
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29 |
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30 |
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31 | #include "sqldbclass.h"
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32 | #include "sqlite3.h"
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33 |
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34 |
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35 | class sqlitedbclass : public sqldbclass
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36 | {
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37 | public:
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38 | sqlitedbclass(const text_t& gsdlhome);
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39 | virtual ~sqlitedbclass();
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40 |
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41 | // returns true if opened
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42 | bool opendatabase (const text_t &filename, int mode, int num_retrys,
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43 | bool need_filelock);
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44 |
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45 | void closedatabase ();
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46 |
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47 | void deletekey (const text_t &key);
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48 |
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49 | // returns file extension string
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50 | text_t getfileextension ();
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51 |
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52 | // returns true on success
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53 | bool getkeydata (const text_t& key, text_t &data);
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54 |
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55 | // returns array of keys
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56 | text_tarray getkeys ();
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57 |
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58 |
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59 | // returns array of document OIDs
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60 | virtual text_tarray get_documents_with_metadata_value (const text_tarray &metadata_element_names,
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61 | const text_t &metadata_value,
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62 | const text_t &sort_by_metadata_element_name);
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63 |
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64 | // returns array of values
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65 | virtual text_tarray get_metadata_values (const text_tarray &metadata_element_names,
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66 | const text_t &metadata_value_filter,
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67 | const text_t &metadata_value_grouping_expression);
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68 |
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69 | // returns true on success
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70 | bool setkeydata (const text_t &key, const text_t &data);
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71 |
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72 | protected:
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73 | text_t openfile;
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74 | sqlite3* sqlitefile;
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75 |
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76 | virtual text_t sql_safe (const text_t &value_arg);
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77 |
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78 | virtual bool sqlexec (const text_t &sql_cmd);
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79 | virtual bool sqlgetarray (const text_t &sql_cmd, vector<text_tmap> &sql_results);
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80 | virtual bool sqltableexists (const text_t &table_name);
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81 |
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82 | };
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83 |
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84 |
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85 | #endif
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