1: <?php
 2: 
 3: namespace Alchemy\core\query;
 4: use Alchemy\core\Element;
 5: use Alchemy\util\promise\IPromisable;
 6: 
 7: 
 8: /**
 9:  * Represents a reference to a column in SQL query
10:  */
11: class ColumnRef extends Element implements IQueryValue, IPromisable {
12: 
13:     protected $schema;
14:     protected $table;
15: 
16: 
17:     public static function list_promisable_methods() {
18:         return array(
19:             'copy'   => "Alchemy\core\query\ColumnRef",
20:             'schema' => "Alchemy\core\schema\Column",
21:             'table'  => "Alchemy\core\query\TableRef");
22:     }
23: 
24: 
25:     /**
26:      * Build and return a Predicate by comparing this
27:      * column to another IQueryValue
28:      *
29:      * @param $name Operator Name: and, or
30:      * @param $args array([0] => IQueryValue, ...) IQueryValue to compare to
31:      */
32:     public function __call($name, $args) {
33:         foreach ($args as &$value) {
34:             if (!($value instanceof IQueryValue)) {
35:                 $value = new Scalar($value);
36:             }
37:         }
38: 
39:         array_unshift($args, $this);
40:         return Predicate::$name($args);
41:     }
42: 
43: 
44:     public function __construct($schema, TableRef $table) {
45:         $this->schema = $schema;
46:         $this->table = $table;
47: 
48:         $this->addTag('expr.value');
49:         $this->addTag('sql.compile', "ColumnRef");
50:     }
51: 
52: 
53:     public function getDescription($maxdepth = 3, $curdepth = 0) {
54:         $str = parent::getDescription($maxdepth, $curdepth);
55:         return "$str ({$this->table->name()}#{$this->table->getID()}.{$this->name()})";
56:     }
57: 
58: 
59:     public function name() {
60:         return $this->schema->getName();
61:     }
62: 
63: 
64:     public function schema() {
65:         return $this->schema;
66:     }
67: 
68: 
69:     public function table() {
70:         return $this->table;
71:     }
72: }