public function testFromString()
{
$fld = \r8\Query\Atom\Field::fromString("field");
$this->assertSame("field", $fld->getField());
$this->assertNull($fld->getTable());
$this->assertNull($fld->getDatabase());
$fld = \r8\Query\Atom\Field::fromString("tbl.field");
$this->assertSame("field", $fld->getField());
$this->assertSame("tbl", $fld->getTable());
$this->assertNull($fld->getDatabase());
$fld = \r8\Query\Atom\Field::fromString("db.tbl.field");
$this->assertSame("field", $fld->getField());
$this->assertSame("tbl", $fld->getTable());
$this->assertSame("db", $fld->getDatabase());
try {
\r8\Query\Atom\Field::fromString(" ");
$this->fail("An expected exception was not thrown");
} catch (\r8\Exception\Argument $err) {
$this->assertSame("Must not be empty", $err->getMessage());
}
}
/**
* Instantiates a new instance of this object from a string
*
* @param String $string The string to parse into an object
* @return \r8\Query\Expr\Ordered
*/
public static function fromString($string)
{
$string = (string) $string;
preg_match('/^(.*?)(\\bASC|\\bDESC)?$/i', $string, $matches);
return new self(\r8\Query\Atom\Field::fromString($matches[1]), isset($matches[2]) ? $matches[2] : null);
}
/**
* Instantiates a new instance of this object from a string
*
* @param String $string The string to parse into an object
* @return \r8\Query\Expr\Aliased
*/
public static function fromString($string)
{
list($string, $alias) = \r8\Query::parseSQLAlias($string);
$atom = \r8\Query\Atom\Field::fromString($string);
return new self($atom, $alias);
}
