/**
* Attempts to match the given token with the current lookahead token.
*
* If they match, updates the lookahead token; otherwise raises a syntax
* error.
*
* @param int $token The token type.
*
* @return void
*
* @throws QueryException If the tokens don't match.
*/
public function match($token)
{
$lookaheadType = $this->lexer->lookahead['type'];
// short-circuit on first condition, usually types match
if ($lookaheadType !== $token && $token !== Lexer::T_IDENTIFIER && $lookaheadType <= Lexer::T_IDENTIFIER) {
$this->syntaxError($this->lexer->getLiteral($token));
}
$this->lexer->moveNext();
}
/**
* QueryLanguage ::= SelectStatement | UpdateStatement | DeleteStatement
*
* @return \Doctrine\ORM\Query\AST\SelectStatement |
* \Doctrine\ORM\Query\AST\UpdateStatement |
* \Doctrine\ORM\Query\AST\DeleteStatement
*/
public function QueryLanguage()
{
$this->lexer->moveNext();
switch ($this->lexer->lookahead['type']) {
case Lexer::T_SELECT:
$statement = $this->SelectStatement();
break;
case Lexer::T_UPDATE:
$statement = $this->UpdateStatement();
break;
case Lexer::T_DELETE:
$statement = $this->DeleteStatement();
break;
default:
$this->syntaxError('SELECT, UPDATE or DELETE');
break;
}
// Check for end of string
if ($this->lexer->lookahead !== null) {
$this->syntaxError('end of string');
}
return $statement;
}
public function testScannerTokenizesASimpleQueryCorrectly()
{
$dql = "SELECT u FROM My\\Namespace\\User u WHERE u.name = 'Jack O''Neil'";
$lexer = new Lexer($dql);
$tokens = array(array('value' => 'SELECT', 'type' => Lexer::T_SELECT, 'position' => 0), array('value' => 'u', 'type' => Lexer::T_IDENTIFIER, 'position' => 7), array('value' => 'FROM', 'type' => Lexer::T_FROM, 'position' => 9), array('value' => 'My\\Namespace\\User', 'type' => Lexer::T_IDENTIFIER, 'position' => 14), array('value' => 'u', 'type' => Lexer::T_IDENTIFIER, 'position' => 32), array('value' => 'WHERE', 'type' => Lexer::T_WHERE, 'position' => 34), array('value' => 'u', 'type' => Lexer::T_IDENTIFIER, 'position' => 40), array('value' => '.', 'type' => Lexer::T_DOT, 'position' => 41), array('value' => 'name', 'type' => Lexer::T_IDENTIFIER, 'position' => 42), array('value' => '=', 'type' => Lexer::T_EQUALS, 'position' => 47), array('value' => "Jack O'Neil", 'type' => Lexer::T_STRING, 'position' => 49));
foreach ($tokens as $expected) {
$lexer->moveNext();
$actual = $lexer->lookahead;
$this->assertEquals($expected['value'], $actual['value']);
$this->assertEquals($expected['type'], $actual['type']);
$this->assertEquals($expected['position'], $actual['position']);
}
$this->assertFalse($lexer->moveNext());
}
