/**
* @param array $tokens
* @return array
*/
public function compile(array $tokens)
{
$stack = new StackLevel(new LogicalOperator('$and'));
foreach ($tokens as $token) {
switch ($token[0]) {
case Parser::TOK_WHITESPACE:
break;
case Parser::TOK_EXPRESSION_SPLIT:
$stack->endExpression();
break;
case Parser::TOK_INT_LITERAL:
$stack->add(new Literal((int) $this->retrieveCapture($token)));
break;
case Parser::TOK_FLOAT_LITERAL:
$stack->add(new Literal((double) $this->retrieveCapture($token)));
break;
case Parser::TOK_LITERAL:
case Parser::TOK_STRING_LITERAL:
$stack->add(new Literal($this->retrieveCapture($token)));
break;
case Parser::TOK_RBRACKET:
if (!($stack = $stack->endExpression()->getParent())) {
throw new UnexpectedClosingParenthesisException();
}
break;
default:
if ($token[0] instanceof Operator) {
$stack->add($token[0]);
} elseif ($token[0] instanceof LogicalOperator) {
$stack = $stack->endExpression()->newLevel($token[0]);
} else {
throw new QueryParserException("Unexpected token of type: " . gettype($token[0]));
}
}
}
$stack->endExpression();
if (!$stack->isTopLevel()) {
throw new UnbalancedParenthesisException($stack->getLevel());
}
$item = $this->groupOperators($stack);
return $item;
}
