/**
* Recursive function to process each node of the expression
*
* @param AbstractExpression $expression Current node to process.
*
* @return string The language specific expression.
*/
private function _processExpressionNode(AbstractExpression $expression)
{
if ($expression instanceof ArithmeticExpression) {
$left = $this->_processExpressionNode($expression->getLeft());
$right = $this->_processExpressionNode($expression->getRight());
return $this->_expressionProvider->onArithmeticExpression($expression->getNodeType(), $left, $right);
} else {
if ($expression instanceof LogicalExpression) {
$left = $this->_processExpressionNode($expression->getLeft());
$right = $this->_processExpressionNode($expression->getRight());
return $this->_expressionProvider->onLogicalExpression($expression->getNodeType(), $left, $right);
} else {
if ($expression instanceof RelationalExpression) {
$left = $this->_processExpressionNode($expression->getLeft());
$right = $this->_processExpressionNode($expression->getRight());
return $this->_expressionProvider->onRelationalExpression($expression->getNodeType(), $left, $right);
} else {
if ($expression instanceof ConstantExpression) {
return $this->_expressionProvider->onConstantExpression($expression->getType(), $expression->getValue());
} else {
if ($expression instanceof PropertyAccessExpression) {
return $this->_expressionProvider->onPropertyAccessExpression($expression);
} else {
if ($expression instanceof FunctionCallExpression) {
$params = array();
foreach ($expression->getParamExpressions() as $paramExpression) {
$params[] = $this->_processExpressionNode($paramExpression);
}
return $this->_expressionProvider->onFunctionCallExpression($expression->getFunctionDescription(), $params);
} else {
if ($expression instanceof UnaryExpression) {
$child = $this->_processExpressionNode($expression->getChild());
return $this->_expressionProvider->onUnaryExpression($expression->getNodeType(), $child);
}
}
}
}
}
}
}
}
