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Improved error checking in Value + more to array conversion control.

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This commit is contained in:
eelke 2017-12-17 09:06:18 +01:00
parent 1fe7d3c56d
commit d9854d81fa
3 changed files with 153 additions and 18 deletions
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78
pgsql/Pgsql_Value.h
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@ -23,35 +23,91 @@ namespace Pgsql {
operator QDate() const;
operator QTime() const;
operator std::string() const;
operator short() const;
operator int() const;
operator int16_t() const;
operator int32_t() const;
operator Oid() const;
operator long long() const;
operator int64_t() const;
operator bool() const;
operator float() const;
operator double() const;
bool isString() const;
enum class NullHandling {
Ignore,
Throw
};
/**
*
* \param insert_iter An insert_iterator which is used to add the elements of the array to a container.
*/
template <typename E, typename I>
void getAsArray(I insert_iter) const
void getAsArray(I insert_iter, NullHandling nullhandling = NullHandling::Throw) const
{
using value_type = E;
ArrayParser parser(m_val);
for (;;) {
auto res = parser.GetNextElem();
if (res.ok) {
std::string str(res.value->data(), res.value->length());
// std::istringstream iss(str);
Value val(str.c_str(), ANYOID);
value_type v;
// iss >> v;
v << val;
insert_iter = v;
if (res.value) {
std::string str(res.value->data(), res.value->length());
Value val(str.c_str(), ANYOID);
value_type v;
v << val;
insert_iter = v;
}
else {
if (nullhandling == NullHandling::Throw)
throw std::runtime_error("Unexpected NULL value in array");
}
}
else
break;
}
}
template <typename E, typename I>
void getAsArray(I insert_iter, const E &value_for_nulls) const
{
using value_type = E;
ArrayParser parser(m_val);
for (;;) {
auto res = parser.GetNextElem();
if (res.ok) {
if (res.value) {
std::string str(res.value->data(), res.value->length());
Value val(str.c_str(), ANYOID);
value_type v;
v << val;
insert_iter = v;
}
else {
insert_iter = value_for_nulls;
}
}
else
break;
}
}
template <typename E, typename I>
void getAsArrayOfOptional(I insert_iter) const
{
using value_type = E;
ArrayParser parser(m_val);
for (;;) {
auto res = parser.GetNextElem();
if (res.ok) {
if (res.value) {
std::string str(res.value->data(), res.value->length());
Value val(str.c_str(), ANYOID);
value_type v;
v << val;
insert_iter = v;
}
else {
insert_iter = std::nullopt;
}
}
else
break;