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enumerate_subimtes implemented in basic_key_to_array_accessor

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sowle 2020-05-18 18:01:11 +03:00
parent 9d2262c5e6
commit 7d73fb92ba
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1 changed files with 36 additions and 8 deletions
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44
src/common/db_abstract_accessor.h
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@ -913,28 +913,48 @@ namespace tools
{ {
typedef basic_key_value_accessor<composite_key<t_key, uint64_t>, t_value, is_t_access_strategy> basic_accessor_type; typedef basic_key_value_accessor<composite_key<t_key, uint64_t>, t_value, is_t_access_strategy> basic_accessor_type;
// template<class t_key>
solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type> solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type>
get_counter_accessor(const t_key& container_id) get_counter_accessor(const t_key& container_id)
{ {
static_assert(std::is_pod<t_key>::value, "t_pod_key must be a POD type."); static_assert(std::is_pod<t_key>::value, "t_pod_key must be a POD type.");
composite_key<t_key, guid_key> cc = { container_id, const_counter_suffix}; composite_key<t_key, guid_key> cc = { container_id, const_counter_suffix};
return solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type >(cc, *this); return solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type >(cc, *this);
} }
// template<class t_key>
const solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type > const solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type >
get_counter_accessor(const t_key& container_id) const get_counter_accessor(const t_key& container_id) const
{ {
static_assert(std::is_pod<t_key>::value, "t_pod_key must be a POD type.");
composite_key<t_key, guid_key> cc = { container_id, const_counter_suffix };
static_assert(std::is_pod<t_key>::value, "t_pod_key must be a POD type."); return solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type >(cc, const_cast<basic_accessor_type&>(static_cast<const basic_accessor_type&>(*this)));
composite_key<t_key, guid_key> cc = { container_id, const_counter_suffix }; }
return solo_db_value<composite_key<t_key, guid_key>, uint64_t, basic_accessor_type >(cc, const_cast<basic_accessor_type&>(static_cast<const basic_accessor_type&>(*this))); template<typename callback_t>
struct subitems_visitor : public i_db_callback
{
subitems_visitor(callback_t cb)
: m_callback(cb)
{}
virtual bool on_enum_item(uint64_t i, const void* key_data, uint64_t key_size, const void* value_data, uint64_t value_size) override
{
if (key_size != sizeof(composite_key<t_key, uint64_t>))
return true; // skip solo values containing items size
composite_key<t_key, uint64_t> key = AUTO_VAL_INIT(key);
key_from_ptr(key, key_data, key_size);
t_value value = AUTO_VAL_INIT(value);
access_strategy_selector<is_t_access_strategy>::from_buff_to_obj(value_data, value_size, value);
return m_callback(i, key.container_id, key.sufix, value);
} }
callback_t m_callback;
};
public: public:
basic_key_to_array_accessor(basic_db_accessor& db) : basic_key_value_accessor<composite_key<t_key, uint64_t>, t_value, is_t_access_strategy>(db) basic_key_to_array_accessor(basic_db_accessor& db) : basic_key_value_accessor<composite_key<t_key, uint64_t>, t_value, is_t_access_strategy>(db)
{} {}
@ -991,6 +1011,14 @@ namespace tools
counter = 0; counter = 0;
} }
template<typename callback_t>
void enumerate_subitems(callback_t callback) const
{
subitems_visitor<callback_t> visitor(callback);
basic_accessor_type::bdb.get_backend()->enumerate(basic_accessor_type::m_h, &visitor);
}
}; };
/************************************************************************/ /************************************************************************/