/**
* Process an unary expression node for nullability
*
* @param UnaryExpression $expression The unary expression node
* to process.
* @param AbstractExpression $parentExpression The parent expression of
* expression node to process.
*
* @return LogicalExpression or NULL
*/
private function _processUnaryNode(UnaryExpression $expression, $parentExpression)
{
if ($expression->getNodeType() == ExpressionType::NEGATE) {
return $this->_processNodeForNullability($expression->getChild(), $expression);
}
if ($expression->getNodeType() == ExpressionType::NOT_LOGICAL) {
$resultExpression = $this->_processNodeForNullability($expression->getChild(), $expression);
if ($resultExpression == null) {
return null;
}
if ($parentExpression == null) {
return new LogicalExpression($resultExpression, $expression, ExpressionType::AND_LOGICAL);
}
return $resultExpression;
}
ODataException::createSyntaxError(Messages::expressionParser2UnexpectedExpression(get_class($expression)));
}
/**
* Parse unary operator (- ,not)
*
* @return AbstractExpression
*/
private function _parseUnary()
{
$this->_recurseEnter();
if ($this->_getCurrentToken()->Id == ExpressionTokenId::MINUS || $this->_getCurrentToken()->identifierIs(ODataConstants::KEYWORD_NOT)) {
$op = clone $this->_getCurrentToken();
$this->_lexer->nextToken();
if ($op->Id == ExpressionTokenId::MINUS && ExpressionLexer::isNumeric($this->_getCurrentToken()->Id)) {
$numberLiteral = $this->_getCurrentToken();
$numberLiteral->Text = '-' . $numberLiteral->Text;
$numberLiteral->Position = $op->Position;
$v = $this->_getCurrentToken();
$this->_setCurrentToken($numberLiteral);
$this->_recurseLeave();
return $this->_parsePrimary();
}
$expr = $this->_parsePrimary();
FunctionDescription::validateUnaryOpArguments($op, $expr);
if ($op->Id == ExpressionTokenId::MINUS) {
$expr = new UnaryExpression($expr, ExpressionType::NEGATE, $expr->getType());
} else {
$expr = new UnaryExpression($expr, ExpressionType::NOT_LOGICAL, new Boolean());
}
$this->_recurseLeave();
return $expr;
}
$this->_recurseLeave();
return $this->_parsePrimary();
}