1 | <?php
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2 | require_once RDFAPI_INCLUDE_DIR . 'constants.php';
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3 | require_once RDFAPI_INCLUDE_DIR . 'util/Object.php';
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4 |
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5 | // ----------------------------------------------------------------------------------
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6 | // Class: DbStore
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7 | // ----------------------------------------------------------------------------------
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8 |
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9 | /**
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10 | * DbStore is a persistent store of RDF data using relational database technology.
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11 | * DbStore uses ADOdb Library for PHP V3.60 (http://php.weblogs.com/ADODB),
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12 | * which allows to connect to multiple databases in a portable manner.
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13 | * This class also provides methods for creating tables for MsAccess, MySQL, and MS SQL Server.
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14 | * If you want to use other databases, you will have to create tables by yourself
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15 | * according to the abstract database schema described in the API documentation.
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16 | *
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17 | * You can activate debug mode by defining ADODB_DEBUG_MODE to "1".
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18 | *
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19 | *
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20 | * @version $Id: DbStore.php 560 2008-02-29 15:24:20Z cax $
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21 | * @author Radoslaw Oldakowski <radol@gmx.de>
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22 | * @author Daniel Westphal (http://www.d-westphal.de)
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23 | *
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24 | * @package model
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25 | * @access public
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26 | */
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27 |
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28 |
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29 | class DbStore extends Object
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30 | {
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31 | /**
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32 | * Array with all supported database types
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33 | *
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34 | * @var array
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35 | */
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36 | public static $arSupportedDbTypes = array(
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37 | "MySQL",
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38 | "MySQLi",
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39 | "MSSQL",
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40 | 'MsAccess'
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41 | );
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42 |
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43 | /**
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44 | * Database connection object
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45 | *
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46 | * @var object ADOConnection
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47 | * @access private
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48 | */
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49 | var $dbConn;
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50 |
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51 | /**
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52 | * Database driver name
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53 | *
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54 | * @var string
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55 | */
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56 | protected $driver = null;
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57 |
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58 | /**
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59 | * SparqlParser so we can re-use it
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60 | * @var Parser
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61 | */
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62 | var $queryParser = null;
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63 |
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64 |
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65 | /**
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66 | * Constructor:
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67 | * Set the database connection with the given parameters.
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68 | *
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69 | * @param string $dbDriver
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70 | * @param string $host
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71 | * @param string $dbName
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72 | * @param string $user
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73 | * @param string $password
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74 | * @access public
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75 | */
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76 | function DbStore ($dbDriver=ADODB_DB_DRIVER, $host=ADODB_DB_HOST, $dbName=ADODB_DB_NAME,
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77 | $user=ADODB_DB_USER, $password=ADODB_DB_PASSWORD) {
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78 |
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79 | // include DBase Package
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80 | require_once(RDFAPI_INCLUDE_DIR.PACKAGE_DBASE);
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81 |
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82 | // create a new connection object
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83 | $this->dbConn =& ADONewConnection($dbDriver);
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84 | $this->driver = $dbDriver;
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85 |
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86 | //activate the ADOdb DEBUG mode
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87 | if (ADODB_DEBUG_MODE == '1')
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88 | $this->dbConn->debug = true;
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89 |
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90 | // connect to database
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91 | $r = $this->dbConn->NConnect($host, $user, $password, $dbName);
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92 | if ($r !== true) {
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93 | throw new Exception('Could not connect to database');
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94 | }
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95 |
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96 | // optimized for speed
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97 | $this->dbConn->setFetchMode(ADODB_FETCH_NUM);
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98 | //$ADODB_COUNTRECS = FALSE;
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99 | }
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100 |
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101 |
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102 |
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103 | /**
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104 | * List all DbModels stored in the database.
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105 | *
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106 | * @return array
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107 | * @throws SqlError
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108 | * @access public
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109 | */
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110 | function listModels() {
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111 |
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112 | $recordSet =& $this->dbConn->execute("SELECT modelURI, baseURI
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113 | FROM models");
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114 | if (!$recordSet)
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115 | echo $this->dbConn->errorMsg();
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116 | else {
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117 | $models = array();
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118 | $i=0;
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119 | while (!$recordSet->EOF) {
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120 |
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121 | $models[$i]['modelURI'] = $recordSet->fields[0];
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122 | $models[$i]['baseURI'] = $recordSet->fields[1];
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123 |
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124 | ++$i;
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125 | $recordSet->moveNext();
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126 | }
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127 | return $models;
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128 | }
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129 | }
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130 |
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131 |
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132 | /**
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133 | * Check if the DbModel with the given modelURI is already stored in the database
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134 | *
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135 | * @param string $modelURI
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136 | * @return boolean
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137 | * @throws SqlError
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138 | * @access public
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139 | */
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140 | function modelExists($modelURI) {
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141 |
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142 | $res =& $this->dbConn->execute("SELECT COUNT(*) FROM models
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143 | WHERE modelURI = '" .$modelURI ."'");
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144 | if (!$res)
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145 | echo $this->dbConn->errorMsg();
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146 | else {
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147 | if (!$res->fields[0]) {
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148 | $res->Close();
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149 | return FALSE;
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150 | } else {
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151 | $res->Close();
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152 | return TRUE;
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153 | }
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154 | }
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155 | }
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156 |
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157 |
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158 |
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159 | /**
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160 | * Returns the database connection object
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161 | *
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162 | * @return ADOdb Database object
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163 | * @access public
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164 | */
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165 | function &getDbConn()
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166 | {
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167 | return $this->dbConn;
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168 | }
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169 |
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170 |
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171 | /**
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172 | * Create a new instance of DbModel with the given $modelURI and
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173 | * load the corresponding values of modelID and baseURI from the database.
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174 | * Return FALSE if the DbModel does not exist.
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175 | *
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176 | * @param string $modelURI
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177 | * @return object DbModel
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178 | * @access public
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179 | */
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180 | function getModel($modelURI) {
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181 |
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182 | if (!$this->modelExists($modelURI))
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183 | return FALSE;
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184 | else {
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185 | $modelVars =& $this->dbConn->execute("SELECT modelURI, modelID, baseURI
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186 | FROM models
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187 | WHERE modelURI='" .$modelURI ."'");
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188 |
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189 | return new DbModel($this->dbConn, $modelVars->fields[0],
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190 | $modelVars->fields[1], $modelVars->fields[2]);
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191 | }
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192 | }
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193 |
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194 |
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195 | /**
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196 | * Create a new instance of DbModel with the given $modelURI
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197 | * and insert the DbModel variables into the database.
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198 | * Return FALSE if there is already a model with the given URI.
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199 | *
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200 | * @param string $modelURI
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201 | * @param string $baseURI
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202 | * @return object DbModel
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203 | * @throws SqlError
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204 | * @access public
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205 | */
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206 | function getNewModel($modelURI, $baseURI=NULL) {
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207 |
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208 | if ($this->modelExists($modelURI))
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209 | return FALSE;
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210 | else {
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211 | $modelID = $this->_createUniqueModelID();
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212 |
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213 | $rs =& $this->dbConn->execute("INSERT INTO models
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214 | (modelID, modelURI, baseURI)
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215 | VALUES (" .$modelID .",
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216 | " .$this->dbConn->qstr($modelURI) .",
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217 | " .$this->dbConn->qstr($baseURI) .")");
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218 |
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219 | if (!$rs)
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220 | return $this->dbConn->errorMsg();
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221 | else
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222 | return new DbModel($this->dbConn, $modelURI, $modelID, $baseURI);
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223 | }
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224 | }
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225 |
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226 |
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227 | /**
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228 | * Store a MemModel or another DbModel from a different DbStore in the database.
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229 | * Return FALSE if there is already a model with modelURI matching the modelURI
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230 | * of the given model.
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231 | *
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232 | * @param object Model &$model
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233 | * @param string $modelURI
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234 | * @return boolean
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235 | * @access public
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236 | */
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237 | function putModel(&$model, $modelURI=NULL) {
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238 |
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239 | if (!$modelURI) {
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240 | if (is_a($model, 'MemModel'))
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241 | $modelURI = 'DbModel-' .$this->_createUniqueModelID();
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242 | else
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243 | $modelURI = $model->modelURI;
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244 | }else
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245 | if ($this->modelExists($modelURI))
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246 | return FALSE;
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247 |
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248 |
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249 | $newDbModel = $this->getNewModel($modelURI, $model->getBaseURI());
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250 | $newDbModel->addModel($model);
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251 | }
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252 |
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253 |
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254 | /**
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255 | * Close the DbStore.
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256 | * !!! Warning: If you close the DbStore all active instances of DbModel from this
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257 | * !!! DbStore will lose their database connection !!!
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258 | *
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259 | * @access public
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260 | */
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261 | function close() {
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262 |
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263 | $this->dbConn->close();
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264 | unset($this);
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265 | }
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266 |
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267 |
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268 | // =============================================================================
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269 | // **************************** private methods ********************************
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270 | // =============================================================================
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271 |
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272 |
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273 | /**
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274 | * Create a unique ID for the DbModel to be insert into the models table.
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275 | * This method was implemented because some databases do not support auto-increment.
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276 | *
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277 | * @return integer
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278 | * @access private
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279 | */
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280 | function _createUniqueModelID() {
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281 |
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282 | $maxModelID =& $this->dbConn->GetOne('SELECT MAX(modelID) FROM models');
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283 | return ++$maxModelID;
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284 | }
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285 |
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286 | /**
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287 | * Create a unique ID for the dataset to be insert into the datasets table.
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288 | * This method was implemented because some databases do not support auto-increment.
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289 | *
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290 | * @return integer
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291 | * @access private
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292 | */
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293 | function _createUniqueDatasetID() {
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294 |
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295 | $maxDatasetID =& $this->dbConn->GetOne('SELECT MAX(datasetId) FROM datasets');
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296 | return ++$maxDatasetID;
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297 | }
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298 |
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299 |
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300 |
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301 | /**
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302 | * Sets up tables for RAP.
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303 | * DOES NOT CHECK IF TABLES ALREADY EXIST
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304 | *
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305 | * @param string $databaseType Database driver name (e.g. MySQL)
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306 | *
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307 | * @throws Exception If database type is unsupported
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308 | * @access public
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309 | **/
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310 | public function createTables($databaseType = null)
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311 | {
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312 | $driver = $this->getDriver($databaseType);
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313 | self::assertDriverSupported($driver);
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314 |
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315 | $createFunc = '_createTables_' . $driver;
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316 | return $this->$createFunc();
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317 | }//public function createTables($databaseType="MySQL")
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318 |
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319 |
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320 |
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321 | /**
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322 | * Create tables and indexes for MsAccess database
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323 | *
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324 | * @return boolean true If all is ok
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325 | *
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326 | * @throws Exception
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327 | */
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328 | protected function _createTables_MsAccess()
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329 | {
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330 | $this->dbConn->startTrans();
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331 |
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332 | $this->dbConn->execute('CREATE TABLE models
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333 | (modelID long primary key,
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334 | modelURI varchar not null,
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335 | baseURI varchar)');
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336 |
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337 | $this->dbConn->execute('CREATE UNIQUE INDEX m_modURI_idx ON models (modelURI)');
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338 |
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339 | $this->dbConn->execute('CREATE TABLE statements
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340 | (modelID long,
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341 | subject varchar,
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342 | predicate varchar,
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343 | object Memo,
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344 | l_language varchar,
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345 | l_datatype varchar,
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346 | subject_is varchar(1),
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347 | object_is varchar(1),
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348 | primary key (modelID, subject, predicate, object,
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349 | l_language, l_datatype))');
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350 |
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351 | $this->dbConn->execute('CREATE INDEX s_mod_idx ON statements (modelID)');
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352 | $this->dbConn->execute('CREATE INDEX s_sub_idx ON statements (subject)');
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353 | $this->dbConn->execute('CREATE INDEX s_pred_idx ON statements (predicate)');
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354 | $this->dbConn->execute('CREATE INDEX s_obj_idx ON statements (object)');
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355 |
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356 | $this->dbConn->execute('CREATE TABLE namespaces
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357 | (modelID long,
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358 | namespace varchar,
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359 | prefix varchar,
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360 | primary key (modelID, namespace, prefix))');
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361 |
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362 | $this->dbConn->execute('CREATE INDEX n_name_idx ON namespaces (namespace)');
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363 | $this->dbConn->execute('CREATE INDEX n_pref_idx ON namespaces (prefix)');
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364 |
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365 | $this->dbConn->execute("CREATE TABLE datasets
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366 | (datasetName varchar,
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367 | defaultModelUri varchar,
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368 | primary key (datasetName))");
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369 |
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370 | $this->dbConn->execute('CREATE INDEX nGS_idx1 ON datasets (datasetName)');
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371 |
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372 |
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373 | $this->dbConn->execute("CREATE TABLE `dataset_model` (
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374 | datasetName varchar,
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375 | modelId long,
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376 | graphURI varchar,
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377 | PRIMARY KEY (modelId,datasetName))");
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378 |
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379 |
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380 | if (!$this->dbConn->completeTrans()) {
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381 | throw new Exception($this->dbConn->errorMsg());
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382 | }
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383 | return true;
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384 | }
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385 |
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386 |
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387 |
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388 | /**
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389 | * Create tables and indexes for MySQL database
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390 | *
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391 | * @return boolean true If all is ok
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392 | *
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393 | * @throws Exception
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394 | */
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395 | function _createTables_MySQL()
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396 | {
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397 |
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398 | $this->dbConn->startTrans();
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399 |
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400 | $this->dbConn->execute("CREATE TABLE models
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401 | (modelID bigint NOT NULL,
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402 | modelURI varchar(255) NOT NULL,
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403 | baseURI varchar(255) DEFAULT '',
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404 | primary key (modelID))");
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405 |
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406 | $this->dbConn->execute('CREATE UNIQUE INDEX m_modURI_idx ON models (modelURI)');
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407 |
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408 | $this->dbConn->execute("CREATE TABLE statements
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409 | (modelID bigint NOT NULL,
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410 | subject varchar(255) NOT NULL,
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411 | predicate varchar(255) NOT NULL,
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412 | object text,
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413 | l_language varchar(255) DEFAULT '',
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414 | l_datatype varchar(255) DEFAULT '',
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415 | subject_is varchar(1) NOT NULL,
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416 | object_is varchar(1) NOT NULL)");
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417 |
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418 | $this->dbConn->execute("CREATE TABLE namespaces
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419 | (modelID bigint NOT NULL,
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420 | namespace varchar(255) NOT NULL,
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421 | prefix varchar(255) NOT NULL,
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422 | primary key (modelID,namespace))");
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423 |
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424 | $this->dbConn->execute("CREATE TABLE `dataset_model` (
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425 | `datasetName` varchar(255) NOT NULL default '0',
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426 | `modelId` bigint(20) NOT NULL default '0',
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427 | `graphURI` varchar(255) NOT NULL default '',
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428 | PRIMARY KEY (`modelId`,`datasetName`))");
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429 |
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430 | $this->dbConn->execute("CREATE TABLE `datasets` (
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431 | `datasetName` varchar(255) NOT NULL default '',
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432 | `defaultModelUri` varchar(255) NOT NULL default '0',
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433 | PRIMARY KEY (`datasetName`),
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434 | KEY `datasetName` (`datasetName`))");
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435 |
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436 | $this->dbConn->execute('CREATE INDEX s_mod_idx ON statements (modelID)');
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437 | $this->dbConn->execute('CREATE INDEX n_mod_idx ON namespaces (modelID)');
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438 |
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439 | $this->dbConn->execute('CREATE INDEX s_sub_pred_idx ON statements
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440 | (subject(200),predicate(200))');
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441 |
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442 | $this->dbConn->execute('CREATE INDEX s_sub_idx ON statements (subject(200))');
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443 | $this->dbConn->execute('CREATE INDEX s_pred_idx ON statements (predicate(200))');
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444 | $this->dbConn->execute('CREATE INDEX s_obj_idx ON statements (object(250))');
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445 |
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446 | $this->dbConn->execute('CREATE FULLTEXT INDEX s_obj_ftidx ON statements (object)');
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447 |
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448 | if (!$this->dbConn->completeTrans()) {
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449 | throw new Exception($this->dbConn->errorMsg());
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450 | }
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451 | return true;
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452 | }
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453 |
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454 |
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455 |
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456 | /**
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457 | * Creates tables on a MySQLi database
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458 | */
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459 | function _createTables_MySQLi()
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460 | {
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461 | return $this->_createTables_MySQL();
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462 | }//function _createTables_MySQLi()
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463 |
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464 |
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465 |
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466 | /**
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467 | * Create tables and indexes for MSSQL database
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468 | *
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469 | * @return boolean true If all is ok
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470 | *
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471 | * @throws Exception
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472 | */
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473 | function _createTables_MSSQL()
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474 | {
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475 | $this->dbConn->startTrans();
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476 |
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477 | $this->dbConn->execute("CREATE TABLE [dbo].[models] (
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478 | [modelID] [int] NOT NULL ,
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479 | [modelURI] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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480 | [baseURI] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
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481 | ) ON [PRIMARY]");
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482 |
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483 | $this->dbConn->execute("CREATE TABLE [dbo].[statements] (
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484 | [modelID] [int] NOT NULL ,
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485 | [subject] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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486 | [predicate] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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487 | [object] [text] COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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488 | [l_language] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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489 | [l_datatype] [nvarchar] (50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
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490 | [subject_is] [nchar] (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
|
---|
491 | [object_is] [nchar] (1) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
|
---|
492 | ) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]");
|
---|
493 |
|
---|
494 |
|
---|
495 | $this->dbConn->execute("CREATE TABLE [dbo].[namespaces] (
|
---|
496 | [modelID] [int] NOT NULL ,
|
---|
497 | [namespace] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
|
---|
498 | [prefix] [nvarchar] (200) COLLATE SQL_Latin1_General_CP1_CI_AS NULL ,
|
---|
499 | ) ON [PRIMARY]");
|
---|
500 |
|
---|
501 | $this->dbConn->execute("ALTER TABLE [dbo].[models] WITH NOCHECK ADD
|
---|
502 | CONSTRAINT [PK_models] PRIMARY KEY CLUSTERED
|
---|
503 | (
|
---|
504 | [modelID]
|
---|
505 | ) ON [PRIMARY] ");
|
---|
506 | $this->dbConn->execute("ALTER TABLE [dbo].[namespaces] WITH NOCHECK ADD
|
---|
507 | CONSTRAINT [PK_namespaces] PRIMARY KEY CLUSTERED
|
---|
508 | (
|
---|
509 | [modelID],[namespace]
|
---|
510 | ) ON [PRIMARY] ");
|
---|
511 |
|
---|
512 | $this->dbConn->execute("CREATE INDEX [joint index on subject and predicate] ON [dbo].[statements]([subject], [predicate]) ON [PRIMARY]");
|
---|
513 |
|
---|
514 |
|
---|
515 | if (!$this->dbConn->completeTrans()) {
|
---|
516 | throw new Exception($this->dbConn->errorMsg());
|
---|
517 | }
|
---|
518 | return true;
|
---|
519 | }
|
---|
520 |
|
---|
521 |
|
---|
522 |
|
---|
523 | /**
|
---|
524 | * Checks if tables are setup for RAP
|
---|
525 | *
|
---|
526 | * @param string $databaseType
|
---|
527 | * @throws Exception If database type is unsupported
|
---|
528 | * @access public
|
---|
529 | **/
|
---|
530 | public function isSetup($databaseType = null)
|
---|
531 | {
|
---|
532 | $driver = $this->getDriver($databaseType);
|
---|
533 | self::assertDriverSupported($driver);
|
---|
534 |
|
---|
535 | $issetupFunc = '_isSetup_' . $driver;
|
---|
536 | return $this->$issetupFunc();
|
---|
537 | }//public function isSetup($databaseType="MySQL")
|
---|
538 |
|
---|
539 |
|
---|
540 |
|
---|
541 | /**
|
---|
542 | * Returns the driver for the database type.
|
---|
543 | * You can pass NULL or omit the parameter to
|
---|
544 | * use the parameter from the dbstore constructor
|
---|
545 | *
|
---|
546 | * @param string $databaseType Database driver name (e.g. MySQL)
|
---|
547 | *
|
---|
548 | * @return string Database driver string (e.g. MySQL)
|
---|
549 | */
|
---|
550 | public function getDriver($databaseType = null)
|
---|
551 | {
|
---|
552 | if ($databaseType === null) {
|
---|
553 | if ($this->driver === null) {
|
---|
554 | //backward compatibility
|
---|
555 | $databaseType = 'MySQL';
|
---|
556 | } else {
|
---|
557 | $databaseType = $this->driver;
|
---|
558 | }
|
---|
559 | }
|
---|
560 | if (!self::isDriverSupported($databaseType)) {
|
---|
561 | //check if it is a known driver in wrong case
|
---|
562 | $arLowercases = array_map('strtolower', self::$arSupportedDbTypes);
|
---|
563 | $arMapping = array_combine($arLowercases, self::$arSupportedDbTypes);
|
---|
564 | if (isset($arMapping[strtolower($databaseType)])) {
|
---|
565 | $databaseType = $arMapping[strtolower($databaseType)];
|
---|
566 | }
|
---|
567 | }
|
---|
568 | return $databaseType;
|
---|
569 | }//public function getDriver($databaseType = null)
|
---|
570 |
|
---|
571 |
|
---|
572 |
|
---|
573 | /**
|
---|
574 | * Returns if the given driver is supported
|
---|
575 | *
|
---|
576 | * @return boolean True if it supported, false if not
|
---|
577 | */
|
---|
578 | public static function isDriverSupported($databaseType)
|
---|
579 | {
|
---|
580 | return in_array($databaseType, self::$arSupportedDbTypes);
|
---|
581 | }//public static function isDriverSupported($databaseType)
|
---|
582 |
|
---|
583 |
|
---|
584 |
|
---|
585 | /**
|
---|
586 | * Checks if the given driver is supported and throws an
|
---|
587 | * Exception if not.
|
---|
588 | *
|
---|
589 | * @param string $databaseType Database driver name (e.g. MySQL)
|
---|
590 | *
|
---|
591 | * @return true If it does not fail
|
---|
592 | *
|
---|
593 | * @throws Exception If the driver is not supported
|
---|
594 | */
|
---|
595 | public static function assertDriverSupported($databaseType)
|
---|
596 | {
|
---|
597 | if (!self::isDriverSupported($databaseType)) {
|
---|
598 | throw new Exception(
|
---|
599 | 'Unsupported database type, only supported: '
|
---|
600 | . implode(', ', self::$arSupportedDbTypes)
|
---|
601 | );
|
---|
602 | }
|
---|
603 | return true;
|
---|
604 | }//public static function assertDriverSupported($databaseType)
|
---|
605 |
|
---|
606 |
|
---|
607 |
|
---|
608 | /**
|
---|
609 | * Checks if tables are setup for RAP (MySql)
|
---|
610 | *
|
---|
611 | * @throws SqlError
|
---|
612 | * @access private
|
---|
613 | **/
|
---|
614 | function _isSetup_MySQL()
|
---|
615 | {
|
---|
616 | $recordSet =& $this->dbConn->execute("SHOW TABLES");
|
---|
617 | if (!$recordSet) {
|
---|
618 | throw new Exception($this->dbConn->errorMsg());
|
---|
619 | } else {
|
---|
620 | $tables = array();
|
---|
621 | while (!$recordSet->EOF) {
|
---|
622 | $tables[]= $recordSet->fields[0];
|
---|
623 | if (isset($i)) {
|
---|
624 | ++$i;
|
---|
625 | }
|
---|
626 | $recordSet->moveNext();
|
---|
627 | }
|
---|
628 | if (in_array("models",$tables) && in_array("statements",$tables)
|
---|
629 | && in_array("namespaces",$tables)) {
|
---|
630 | return true;
|
---|
631 | }
|
---|
632 | }
|
---|
633 | return false;
|
---|
634 | }//function _isSetup_MySQL()
|
---|
635 |
|
---|
636 |
|
---|
637 |
|
---|
638 | /**
|
---|
639 | * Checks if tables are setup for RAP (MySQLi)
|
---|
640 | *
|
---|
641 | * @see _isSetup_MySQL()
|
---|
642 | */
|
---|
643 | function _isSetup_MySQLi()
|
---|
644 | {
|
---|
645 | return $this->_isSetup_MySQL();
|
---|
646 | }//function _isSetup_MySQLi()
|
---|
647 |
|
---|
648 |
|
---|
649 |
|
---|
650 | /**
|
---|
651 | * Checks if tables are setup for RAP (MsAccess)
|
---|
652 | *
|
---|
653 | * @throws SqlError
|
---|
654 | * @access private
|
---|
655 | **/
|
---|
656 | function _isSetup_MsAccess()
|
---|
657 | {
|
---|
658 | $tables =& $this->dbConn->MetaTables();
|
---|
659 | if (!$tables) {
|
---|
660 | throw new Exception($this->dbConn->errorMsg());
|
---|
661 | }
|
---|
662 | if (count($tables) == 0) {
|
---|
663 | return false;
|
---|
664 | } else {
|
---|
665 | if (in_array("models",$tables) && in_array("statements",$tables)
|
---|
666 | && in_array("namespaces",$tables)) {
|
---|
667 | return true;
|
---|
668 | } else {
|
---|
669 | return false;
|
---|
670 | }
|
---|
671 | }
|
---|
672 | }//function _isSetup_MsAccess()
|
---|
673 |
|
---|
674 |
|
---|
675 |
|
---|
676 | /**
|
---|
677 | * Checks if tables are setup for RAP (MSSQL)
|
---|
678 | *
|
---|
679 | * @throws SqlError
|
---|
680 | * @access private
|
---|
681 | **/
|
---|
682 | function _isSetup_MSSQL()
|
---|
683 | {
|
---|
684 | $tables =& $this->dbConn->MetaTables();
|
---|
685 | if (!$tables) {
|
---|
686 | throw new Exception($this->dbConn->errorMsg());
|
---|
687 | }
|
---|
688 | if (count($tables) == 0) {
|
---|
689 | return false;
|
---|
690 | } else {
|
---|
691 | if (in_array("models",$tables) && in_array("statements",$tables)
|
---|
692 | && in_array("namespaces",$tables)){
|
---|
693 | return true;
|
---|
694 | } else {
|
---|
695 | return false;
|
---|
696 | }
|
---|
697 | }
|
---|
698 | }//function _isSetup_MSSQL()
|
---|
699 |
|
---|
700 |
|
---|
701 | /**
|
---|
702 | * Create a new instance of DatasetDb with the given $datasetName
|
---|
703 | * and insert the DatasetDb variables into the database.
|
---|
704 | * Return FALSE if there is already a model with the given URI.
|
---|
705 | *
|
---|
706 | * @param $datasetName string
|
---|
707 | * @return object DatasetDB
|
---|
708 | * @throws SqlError
|
---|
709 | * @access public
|
---|
710 | */
|
---|
711 | function & getNewDatasetDb($datasetName)
|
---|
712 | {
|
---|
713 |
|
---|
714 | require_once(RDFAPI_INCLUDE_DIR . PACKAGE_DATASET);
|
---|
715 |
|
---|
716 | if ($this->datasetExists($datasetName))
|
---|
717 | return FALSE;
|
---|
718 | else
|
---|
719 | {
|
---|
720 | $defaultModelUri=uniqid('http://rdfapi-php/dataset_defaultmodel_');
|
---|
721 | $defaultModel=$this->getNewModel($defaultModelUri);
|
---|
722 |
|
---|
723 | $rs =& $this->dbConn->execute("INSERT INTO datasets
|
---|
724 | VALUES ('" .$this->dbConn->qstr($datasetName) ."',
|
---|
725 | '" .$this->dbConn->qstr($defaultModelUri)."')");
|
---|
726 |
|
---|
727 | if (!$rs)
|
---|
728 | $this->dbConn->errorMsg();
|
---|
729 | else
|
---|
730 | $return=new DatasetDb($this->dbConn, $this, $datasetName);
|
---|
731 | return ($return);
|
---|
732 | }
|
---|
733 | }
|
---|
734 |
|
---|
735 | /**
|
---|
736 | * Check if the Dataset with the given $datasetName is already stored in the database
|
---|
737 | *
|
---|
738 | * @param $datasetName string
|
---|
739 | * @return boolean
|
---|
740 | * @throws SqlError
|
---|
741 | * @access public
|
---|
742 | */
|
---|
743 | function datasetExists($datasetName) {
|
---|
744 |
|
---|
745 | $res =& $this->dbConn->execute("SELECT COUNT(*) FROM datasets
|
---|
746 | WHERE datasetName = '" .$datasetName ."'");
|
---|
747 | if (!$res)
|
---|
748 | echo $this->dbConn->errorMsg();
|
---|
749 | else {
|
---|
750 | if (!$res->fields[0])
|
---|
751 | return FALSE;
|
---|
752 | return TRUE;
|
---|
753 | }
|
---|
754 | }
|
---|
755 |
|
---|
756 |
|
---|
757 | /**
|
---|
758 | * Create a new instance of DatasetDb with the given $datasetName and
|
---|
759 | * load the corresponding values from the database.
|
---|
760 | * Return FALSE if the DbModel does not exist.
|
---|
761 | *
|
---|
762 | * @param $datasetId string
|
---|
763 | * @return object DatasetDb
|
---|
764 | * @access public
|
---|
765 | */
|
---|
766 | function &getDatasetDb($datasetName) {
|
---|
767 | require_once(RDFAPI_INCLUDE_DIR . PACKAGE_DATASET);
|
---|
768 |
|
---|
769 | if (!$this->datasetExists($datasetName)) {
|
---|
770 | return FALSE;
|
---|
771 | } else {
|
---|
772 | $return = new DatasetDb($this->dbConn, $this, $datasetName);
|
---|
773 | return ($return);
|
---|
774 | }
|
---|
775 | }
|
---|
776 |
|
---|
777 | /**
|
---|
778 | * Create a new instance of namedGraphDb with the given $modelURI and graphName and
|
---|
779 | * load the corresponding values of modelID and baseURI from the database.
|
---|
780 | * Return FALSE if the DbModel does not exist.
|
---|
781 | *
|
---|
782 | * @param $modelURI string
|
---|
783 | * @param $graphName string
|
---|
784 | * @return object NamedGraphMem
|
---|
785 | * @access public
|
---|
786 | */
|
---|
787 | function getNamedGraphDb($modelURI, $graphName)
|
---|
788 | {
|
---|
789 | require_once(RDFAPI_INCLUDE_DIR . PACKAGE_DATASET);
|
---|
790 |
|
---|
791 | if (!$this->modelExists($modelURI))
|
---|
792 | return FALSE;
|
---|
793 | else {
|
---|
794 | $modelVars =& $this->dbConn->execute("SELECT modelURI, modelID, baseURI
|
---|
795 | FROM models
|
---|
796 | WHERE modelURI='" .$modelURI ."'");
|
---|
797 |
|
---|
798 | return new NamedGraphDb($this->dbConn, $modelVars->fields[0],
|
---|
799 | $modelVars->fields[1], $graphName ,$modelVars->fields[2]);
|
---|
800 | }
|
---|
801 | }
|
---|
802 |
|
---|
803 | /**
|
---|
804 | * Create a new instance of namedGraphDb with the given $modelURI and graphName
|
---|
805 | * and insert the DbModel variables into the database (not the graphName. This
|
---|
806 | * is only stored persistently, when added to dataset).
|
---|
807 | * Return FALSE if there is already a model with the given URI.
|
---|
808 | *
|
---|
809 | * @param $modelURI string
|
---|
810 | * @param $graphName string
|
---|
811 | * @param $baseURI string
|
---|
812 | * @return object namedGraphDb
|
---|
813 | * @throws SqlError
|
---|
814 | * @access public
|
---|
815 | */
|
---|
816 | function getNewNamedGraphDb($modelURI, $graphName, $baseURI=NULL) {
|
---|
817 |
|
---|
818 | if ($this->modelExists($modelURI))
|
---|
819 | return FALSE;
|
---|
820 | else {
|
---|
821 | $modelID = $this->_createUniqueModelID();
|
---|
822 |
|
---|
823 | $rs =& $this->dbConn->execute("INSERT INTO models
|
---|
824 | (modelID, modelURI, baseURI)
|
---|
825 | VALUES (" .$modelID ."',
|
---|
826 | " .$this->dbConn->qstr($modelURI) ."',
|
---|
827 | " .$this->dbConn->qstr($baseURI) .")");
|
---|
828 | if (!$rs)
|
---|
829 | $this->dbConn->errorMsg();
|
---|
830 | else
|
---|
831 | return new NamedGraphDb($this->dbConn, $modelURI, $modelID, $graphName, $baseURI);
|
---|
832 | }
|
---|
833 | }
|
---|
834 |
|
---|
835 | /**
|
---|
836 | * Removes the graph with all statements from the database.
|
---|
837 | * Warning: A single namedGraph can be added to several datasets. So it'll be
|
---|
838 | * removed from all datasets.
|
---|
839 | *
|
---|
840 | * @param $modelURI string
|
---|
841 | * @return boolean
|
---|
842 | * @throws SqlError
|
---|
843 | * @access public
|
---|
844 | */
|
---|
845 | function removeNamedGraphDb($modelURI)
|
---|
846 | {
|
---|
847 | if (!$this->modelExists($modelURI))
|
---|
848 | return FALSE;
|
---|
849 |
|
---|
850 | $modelID = $this->dbConn->GetOne("SELECT modelID FROM models WHERE modelURI='".$modelURI."'");
|
---|
851 |
|
---|
852 | $this->dbConn->execute("DELETE FROM models WHERE modelID=".$modelID);
|
---|
853 | $this->dbConn->execute("DELETE FROM dataset_model WHERE modelId=".$modelID);
|
---|
854 | $this->dbConn->execute("DELETE FROM statements WHERE modelID=".$modelID);
|
---|
855 |
|
---|
856 | return true;
|
---|
857 | }
|
---|
858 |
|
---|
859 |
|
---|
860 |
|
---|
861 | /**
|
---|
862 | * Performs a SPARQL query against a model. The model is converted to
|
---|
863 | * an RDF Dataset. The result can be retrived in SPARQL Query Results XML Format or
|
---|
864 | * as an array containing the variables an their bindings.
|
---|
865 | *
|
---|
866 | * @param string $query Sparql query string
|
---|
867 | * @param mixed $arModelIds Array of modelIDs, or NULL to use all models
|
---|
868 | * @param string $resultform Result form ('xml' for SPARQL Query Results XML Format)
|
---|
869 | * @return string/array
|
---|
870 | */
|
---|
871 | function sparqlQuery($query, $arModelIds = null, $resultform = false)
|
---|
872 | {
|
---|
873 | $engine = $this->_prepareSparql($arModelIds);
|
---|
874 | return $engine->queryModel(
|
---|
875 | null,
|
---|
876 | $this->_parseSparqlQuery($query),
|
---|
877 | $resultform
|
---|
878 | );
|
---|
879 | }//function sparqlQuery($query,$resultform = false)
|
---|
880 |
|
---|
881 |
|
---|
882 |
|
---|
883 | /**
|
---|
884 | * Prepares everything for SparqlEngine-usage
|
---|
885 | * Loads the files, creates instances for SparqlEngine and
|
---|
886 | * Dataset...
|
---|
887 | *
|
---|
888 | * @return SparqlEngineDb
|
---|
889 | */
|
---|
890 | function _prepareSparql($arModelIds)
|
---|
891 | {
|
---|
892 | require_once RDFAPI_INCLUDE_DIR . 'sparql/SparqlEngineDb.php';
|
---|
893 | return new SparqlEngineDb($this, $arModelIds);
|
---|
894 | }//function _prepareSparql()
|
---|
895 |
|
---|
896 |
|
---|
897 |
|
---|
898 | /**
|
---|
899 | * Parses an query and returns the parsed form.
|
---|
900 | * If the query is not a string but a Query object,
|
---|
901 | * it will just be returned.
|
---|
902 | *
|
---|
903 | * @param $query mixed String or Query object
|
---|
904 | * @return Query query object
|
---|
905 | * @throws Exception If $query is no string and no Query object
|
---|
906 | */
|
---|
907 | function _parseSparqlQuery($query)
|
---|
908 | {
|
---|
909 | if ($this->queryParser === null) {
|
---|
910 | require_once RDFAPI_INCLUDE_DIR . 'sparql/SparqlParser.php';
|
---|
911 | $this->queryParser = new SparqlParser();
|
---|
912 | }
|
---|
913 | return $this->queryParser->parse($query);
|
---|
914 | }//function _parseSparqlQuery($query)
|
---|
915 |
|
---|
916 | } // end: Class DbStore
|
---|
917 | ?> |
---|