mirror of
https://github.com/jezhiggins/arabica
synced 2024-12-28 22:23:21 +01:00
64 lines
2.9 KiB
C++
64 lines
2.9 KiB
C++
#ifndef ARABICA_XPATHIC_XPATH_LOGICAL_HPP
|
|
#define ARABICA_XPATHIC_XPATH_LOGICAL_HPP
|
|
|
|
#include "xpath_value.hpp"
|
|
|
|
namespace Arabica
|
|
{
|
|
namespace XPath
|
|
{
|
|
namespace impl
|
|
{
|
|
|
|
template<class string_type, class string_adaptor>
|
|
class OrOperator : private BinaryExpression<string_type, string_adaptor>,
|
|
public XPathExpression<string_type, string_adaptor>
|
|
{
|
|
typedef BinaryExpression<string_type, string_adaptor> baseT;
|
|
public:
|
|
OrOperator(XPathExpression<string_type, string_adaptor>* lhs,
|
|
XPathExpression<string_type, string_adaptor>* rhs) :
|
|
BinaryExpression<string_type, string_adaptor>(lhs, rhs) { }
|
|
|
|
virtual XPathValue<string_type, string_adaptor> evaluate(const DOM::Node<string_type, string_adaptor>& context,
|
|
const ExecutionContext<string_type, string_adaptor>& executionContext) const
|
|
{
|
|
// From XPath 1.0 Rec, section 3.4
|
|
// An or expression is evaluated by evaluating each operand and converting its value
|
|
// to a boolean as if by a call to the boolean function. The result is true if either
|
|
// value is true and false otherwise. The right operand is not evaluated if the
|
|
// left operand evaluates to true.
|
|
if(baseT::lhs()->evaluate(context, executionContext).asBool())
|
|
return BoolValue<string_type, string_adaptor>::createValue(true);
|
|
return BoolValue<string_type, string_adaptor>::createValue(baseT::rhs()->evaluate(context, executionContext).asBool());
|
|
} // evaluate
|
|
}; // class OrOperator
|
|
|
|
template<class string_type, class string_adaptor>
|
|
class AndOperator : private BinaryExpression<string_type, string_adaptor>,
|
|
public XPathExpression<string_type, string_adaptor>
|
|
{
|
|
typedef BinaryExpression<string_type, string_adaptor> baseT;
|
|
public:
|
|
AndOperator(XPathExpression<string_type, string_adaptor>* lhs,
|
|
XPathExpression<string_type, string_adaptor>* rhs) :
|
|
BinaryExpression<string_type, string_adaptor>(lhs, rhs) { }
|
|
|
|
virtual XPathValue<string_type, string_adaptor> evaluate(const DOM::Node<string_type, string_adaptor>& context,
|
|
const ExecutionContext<string_type, string_adaptor>& executionContext) const
|
|
{
|
|
// From XPath 1.0 Rec, section 3.4
|
|
// An and expression is evaluated by evaluating each operand and converting its value
|
|
// to a boolean as if by a call to the boolean function. The result is true if both
|
|
// values are true and false otherwise. The right operand is not evaluated if the left
|
|
// operand evaluates to false.
|
|
if(!baseT::lhs()->evaluate(context, executionContext).asBool())
|
|
return BoolValue<string_type, string_adaptor>::createValue(false);
|
|
return BoolValue<string_type, string_adaptor>::createValue(baseT::rhs()->evaluate(context, executionContext).asBool());
|
|
} // evaluate
|
|
}; // class AndOperator
|
|
|
|
} // namespace impl
|
|
} // namespace XPath
|
|
} // namespace Arabica
|
|
#endif
|