| 1 | <?php |
| 2 | /* |
| 3 | * $Id: From.php 1080 2007-02-10 18:17:08Z romanb $ |
| 4 | * |
| 5 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 6 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 7 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 8 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 9 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 10 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 11 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 12 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 13 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 14 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 15 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 16 | * |
| 17 | * This software consists of voluntary contributions made by many individuals |
| 18 | * and is licensed under the LGPL. For more information, see |
| 19 | * <http://www.phpdoctrine.com>. |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * Doctrine_Query_Check |
| 24 | * |
| 25 | * @package Doctrine |
| 26 | * @subpackage Query |
| 27 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 28 | * @link www.phpdoctrine.com |
| 29 | * @since 1.0 |
| 30 | * @version $Revision: 1080 $ |
| 31 | * @author Konsta Vesterinen <kvesteri@cc.hut.fi> |
| 32 | */ |
| 33 | class Doctrine_Query_Check |
| 34 | { |
| 35 | /** |
| 36 | * @var Doctrine_Table $table Doctrine_Table object |
| 37 | */ |
| 38 | protected $table; |
| 39 | |
| 40 | /** |
| 41 | * @var string $sql database specific sql CHECK constraint definition |
| 42 | * parsed from the given dql CHECK definition |
| 43 | */ |
| 44 | protected $sql; |
| 45 | |
| 46 | /** |
| 47 | * @param Doctrine_Table|string $table Doctrine_Table object |
| 48 | */ |
| 49 | public function __construct($table) |
| 50 | { |
| 51 | if ( ! ($table instanceof Doctrine_Table)) { |
| 52 | $table = Doctrine_Manager::getInstance() |
| 53 | ->getCurrentConnection() |
| 54 | ->getTable($table); |
| 55 | } |
| 56 | $this->table = $table; |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * getTable |
| 61 | * returns the table object associated with this object |
| 62 | * |
| 63 | * @return Doctrine_Connection |
| 64 | */ |
| 65 | public function getTable() |
| 66 | { |
| 67 | return $this->table; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * parse |
| 72 | * |
| 73 | * @param string $dql DQL CHECK constraint definition |
| 74 | * @return string |
| 75 | */ |
| 76 | public function parse($dql) |
| 77 | { |
| 78 | $this->sql = $this->parseClause($dql); |
| 79 | } |
| 80 | |
| 81 | /** |
| 82 | * parseClause |
| 83 | * |
| 84 | * @param string $alias component alias |
| 85 | * @param string $field the field name |
| 86 | * @param mixed $value the value of the field |
| 87 | * @return void |
| 88 | */ |
| 89 | public function parseClause($dql) |
| 90 | { |
| 91 | $parts = Doctrine_Tokenizer::sqlExplode($dql, ' AND '); |
| 92 | |
| 93 | if (count($parts) > 1) { |
| 94 | $ret = array(); |
| 95 | foreach ($parts as $part) { |
| 96 | $ret[] = $this->parseSingle($part); |
| 97 | } |
| 98 | |
| 99 | $r = implode(' AND ', $ret); |
| 100 | } else { |
| 101 | $parts = Doctrine_Tokenizer::quoteExplode($dql, ' OR '); |
| 102 | if (count($parts) > 1) { |
| 103 | $ret = array(); |
| 104 | foreach ($parts as $part) { |
| 105 | $ret[] = $this->parseClause($part); |
| 106 | } |
| 107 | |
| 108 | $r = implode(' OR ', $ret); |
| 109 | } else { |
| 110 | $ret = $this->parseSingle($dql); |
| 111 | return $ret; |
| 112 | } |
| 113 | } |
| 114 | return '(' . $r . ')'; |
| 115 | } |
| 116 | public function parseSingle($part) |
| 117 | { |
| 118 | $e = explode(' ', $part); |
| 119 | |
| 120 | $e[0] = $this->parseFunction($e[0]); |
| 121 | |
| 122 | switch ($e[1]) { |
| 123 | case '>': |
| 124 | case '<': |
| 125 | case '=': |
| 126 | case '!=': |
| 127 | case '<>': |
| 128 | |
| 129 | break; |
| 130 | default: |
| 131 | throw new Doctrine_Query_Exception('Unknown operator ' . $e[1]); |
| 132 | } |
| 133 | |
| 134 | return implode(' ', $e); |
| 135 | } |
| 136 | public function parseFunction($dql) |
| 137 | { |
| 138 | if (($pos = strpos($dql, '(')) !== false) { |
| 139 | $func = substr($dql, 0, $pos); |
| 140 | $value = substr($dql, ($pos + 1), -1); |
| 141 | |
| 142 | $expr = $this->table->getConnection()->expression; |
| 143 | |
| 144 | if ( ! method_exists($expr, $func)) { |
| 145 | throw new Doctrine_Query_Exception('Unknown function ' . $func); |
| 146 | } |
| 147 | |
| 148 | $func = $expr->$func($value); |
| 149 | } |
| 150 | return $func; |
| 151 | } |
| 152 | |
| 153 | /** |
| 154 | * getSql |
| 155 | * |
| 156 | * returns database specific sql CHECK constraint definition |
| 157 | * parsed from the given dql CHECK definition |
| 158 | * |
| 159 | * @return string |
| 160 | */ |
| 161 | public function getSql() |
| 162 | { |
| 163 | return $this->sql; |
| 164 | } |
| 165 | } |