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| 27 | PointedEar | 1 | <?php |
| 2 | |||
| 3 | require_once 'lib/Db/Table.php'; |
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| 4 | |||
| 5 | /** |
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| 6 | * Generic abstract database mapper class |
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| 7 | * |
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| 8 | * @author Thomas Lahn |
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| 9 | */ |
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| 10 | abstract class Mapper |
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| 11 | { |
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| 12 | /** |
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| 13 | * Class name of the associated table model |
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| 14 | * |
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| 15 | * @var string |
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| 16 | */ |
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| 17 | protected $_table = 'Table'; |
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| 18 | |||
| 19 | protected $_dbTable; |
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| 20 | |||
| 21 | /** |
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| 22 | * Sets the {@link Table} for this mapper |
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| 23 | * @param string|Table $dbTable |
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| 24 | * Class name of the new instance, or an existing instance |
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| 25 | * @throws Exception if <var>$dbTable</var> is not a <code>Table</code> |
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| 26 | */ |
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| 27 | public function setDbTable($table) |
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| 28 | { |
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| 29 | if (is_string($table)) |
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| 30 | { |
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| 31 | $table = new $table(); |
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| 32 | } |
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| 33 | |||
| 34 | if (!($table instanceof Table)) { |
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| 35 | throw new Exception('Invalid table data gateway provided'); |
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| 36 | } |
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| 37 | |||
| 38 | $this->_dbTable = $table; |
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| 39 | } |
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| 40 | |||
| 41 | /** |
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| 42 | * Gets the {@link Table} for this mapper |
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| 43 | * |
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| 44 | * @param string|Table $table |
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| 45 | * Class name of the new instance or an existing instance. |
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| 46 | * The default is the value of the <code>$_table</code> property. |
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| 47 | * @return Table |
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| 48 | * @throws Exception if <var>$dbTable</var> is not a <code>Table</code> |
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| 49 | * @see Mapper::setDbTable() |
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| 50 | */ |
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| 51 | public function getDbTable($table = null) |
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| 52 | { |
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| 53 | if (is_null($this->_dbTable)) |
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| 54 | { |
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| 55 | if (is_null($table)) |
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| 56 | { |
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| 57 | $table = $this->_table; |
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| 58 | } |
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| 59 | |||
| 60 | $this->setDbTable($table); |
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| 61 | } |
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| 62 | |||
| 63 | return $this->_dbTable; |
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| 64 | } |
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| 65 | |||
| 66 | /** |
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| 67 | * Sorts an array of objects by the property of the nested object. |
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| 68 | * To be used with the u*sort() functions. |
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| 69 | * |
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| 70 | * @param object $a First operand of the comparison |
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| 71 | * @param object $b Second operand of the comparison |
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| 72 | * @param string $property |
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| 73 | * Name of the property of the nested object by which to sort the outer array |
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| 74 | * @return int |
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| 75 | * 0 if <var>$a</var> and <var>$b</var> are "equal", |
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| 76 | * <code>-1</code> if <var>$a</var> is "less" than <var>$b</var>, |
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| 77 | * <code>1</code> otherwise. |
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| 78 | */ |
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| 79 | protected static function sortByProperty($a, $b, $property) |
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| 80 | { |
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| 81 | if ($a->$property === $b->$property) |
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| 82 | { |
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| 83 | return 0; |
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| 84 | } |
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| 85 | |||
| 86 | return ($a->$property < $b->$property) ? -1 : 1; |
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| 87 | } |
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| 88 | } |