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author | Boris Kolpackov <boris@codesynthesis.com> | 2012-04-23 16:48:01 +0200 |
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committer | Boris Kolpackov <boris@codesynthesis.com> | 2012-04-23 16:48:01 +0200 |
commit | 42503207920b9264e04c97cb6a5c53214fd2eff8 (patch) | |
tree | dd192b60515188e2afd6f11e7cc54aac73f571e4 /odb/mysql/polymorphic-object-statements.txx | |
parent | 4d0711124bb6cdca491e33a51911d20090a1879a (diff) |
Polymorphic inheritance support
Diffstat (limited to 'odb/mysql/polymorphic-object-statements.txx')
-rw-r--r-- | odb/mysql/polymorphic-object-statements.txx | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/odb/mysql/polymorphic-object-statements.txx b/odb/mysql/polymorphic-object-statements.txx new file mode 100644 index 0000000..19e5d52 --- /dev/null +++ b/odb/mysql/polymorphic-object-statements.txx @@ -0,0 +1,141 @@ +// file : odb/mysql/polymorphic-object-statements.txx +// copyright : Copyright (c) 2005-2012 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#include <cstring> // std::memset + +#include <odb/callback.hxx> +#include <odb/exceptions.hxx> + +#include <odb/mysql/connection.hxx> +#include <odb/mysql/transaction.hxx> +#include <odb/mysql/statement-cache.hxx> + +namespace odb +{ + namespace mysql + { + // + // polymorphic_root_object_statements + // + + template <typename T> + polymorphic_root_object_statements<T>:: + ~polymorphic_root_object_statements () + { + } + + template <typename T> + polymorphic_root_object_statements<T>:: + polymorphic_root_object_statements (connection_type& conn) + : object_statements<T> (conn), + discriminator_image_binding_ (discriminator_image_bind_, + discriminator_column_count + + managed_optimistic_column_count), + discriminator_id_image_binding_ (discriminator_id_image_bind_, + id_column_count) + { + discriminator_image_.version = 0; + discriminator_id_image_.version = 0; + + discriminator_image_version_ = 0; + discriminator_id_image_version_ = 0; + + std::memset (discriminator_image_bind_, + 0, + sizeof (discriminator_image_bind_)); + std::memset (discriminator_id_image_bind_, + 0, + sizeof (discriminator_id_image_bind_)); + std::memset (discriminator_image_truncated_, + 0, + sizeof (discriminator_image_truncated_)); + + for (std::size_t i (0); + i < discriminator_column_count + managed_optimistic_column_count; + ++i) + { + discriminator_image_bind_[i].error = + discriminator_image_truncated_ + i; + } + } + + // + // polymorphic_derived_object_statements + // + + template <typename T> + polymorphic_derived_object_statements<T>:: + ~polymorphic_derived_object_statements () + { + } + + template <typename T> + polymorphic_derived_object_statements<T>:: + polymorphic_derived_object_statements (connection_type& conn) + : statements_base (conn), + root_statements_ (conn.statement_cache ().find_object<root_type> ()), + base_statements_ (conn.statement_cache ().find_object<base_type> ()), + container_statement_cache_ (conn), + insert_image_binding_ (insert_image_bind_, insert_column_count), + update_image_binding_ (update_image_bind_, + update_column_count + id_column_count) + { + image_.base = &base_statements_.image (); + image_.version = 0; + + for (std::size_t i (0); i < object_traits::depth; ++i) + select_image_versions_[i] = 0; + + for (std::size_t i (0); + i < (object_traits::abstract ? 1 : object_traits::depth); + ++i) + { + select_image_bindings_[i].bind = select_image_bind_; + select_image_bindings_[i].count = object_traits::find_column_counts[i]; + } + + insert_image_version_ = 0; + insert_id_binding_version_ = 0; + update_image_version_ = 0; + update_id_binding_version_ = 0; + + std::memset (insert_image_bind_, 0, sizeof (insert_image_bind_)); + std::memset (update_image_bind_, 0, sizeof (update_image_bind_)); + std::memset (select_image_bind_, 0, sizeof (select_image_bind_)); + std::memset ( + select_image_truncated_, 0, sizeof (select_image_truncated_)); + + for (std::size_t i (0); i < select_column_count; ++i) + select_image_bind_[i].error = select_image_truncated_ + i; + } + + template <typename T> + void polymorphic_derived_object_statements<T>:: + delayed_loader (odb::database& db, const id_type& id, root_type& robj) + { + connection_type& conn (transaction::current ().connection ()); + polymorphic_derived_object_statements& sts ( + conn.statement_cache ().find_object<object_type> ()); + root_statements_type& rsts (sts.root_statements ()); + + object_type& obj (static_cast<object_type&> (robj)); + + // The same code as in object_statements::load_delayed_(). + // + if (!object_traits::find_ (sts, &id)) + throw object_not_persistent (); + + object_traits::callback (db, obj, callback_event::pre_load); + object_traits::init (obj, sts.image (), &db); + object_traits::load_ (sts, obj); // Load containers, etc. + + rsts.load_delayed (); + + { + typename root_statements_type::auto_unlock u (rsts); + object_traits::callback (db, obj, callback_event::post_load); + } + } + } +} |