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<?php
namespace CzProject\SqlGenerator\Statements;
use CzProject\SqlGenerator\OutOfRangeException;
use CzProject\SqlGenerator\Helpers;
use CzProject\SqlGenerator\IDriver;
use CzProject\SqlGenerator\IStatement;
class IndexColumnDefinition implements IStatement
{
const ASC = 'ASC';
const DESC = 'DESC';
private $name;
private $order;
private $length;
public function __construct($name, $order = self::ASC, $length = NULL)
{
$this->name = $name;
$this->setOrder($order);
$this->length = $length;
}
private function setOrder($order)
{
$order = (string) $order;
if ($order !== self::ASC && $order !== self::DESC) {
throw new OutOfRangeException("Order type '$order' not found.");
}
$this->order = $order;
return $this;
}
public function toSql(IDriver $driver)
{
$output = $driver->escapeIdentifier($this->name);
if ($this->length !== NULL) {
$output .= ' (' . $this->length . ')';
}
if ($this->order !== self::ASC) {
$output .= ' ' . $this->order;
}
return $output;
}
}