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20 namespace Doctrine\ORM\Query\Expr;
23 * Expression class for DQL math statements
26 * @link www.doctrine-project.org
28 * @author Guilherme Blanco <guilhermeblanco@hotmail.com>
29 * @author Jonathan Wage <jonwage@gmail.com>
30 * @author Roman Borschel <roman@code-factory.org>
50 * Creates a mathematical expression with the given arguments.
52 * @param mixed $leftExpr
53 * @param string $operator
54 * @param mixed $rightExpr
56 public function __construct($leftExpr, $operator, $rightExpr)
58 $this->leftExpr = $leftExpr;
59 $this->operator = $operator;
60 $this->rightExpr = $rightExpr;
66 public function getLeftExpr()
68 return $this->leftExpr;
74 public function getOperator()
76 return $this->operator;
82 public function getRightExpr()
84 return $this->rightExpr;
90 public function __toString()
92 // Adjusting Left Expression
93 $leftExpr = (string) $this->leftExpr;
95 if ($this->leftExpr instanceof Math) {
96 $leftExpr = '(' . $leftExpr . ')';
99 // Adjusting Right Expression
100 $rightExpr = (string) $this->rightExpr;
102 if ($this->rightExpr instanceof Math) {
103 $rightExpr = '(' . $rightExpr . ')';
106 return $leftExpr . ' ' . $this->operator . ' ' . $rightExpr;