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Diffstat (limited to 'odb/sqlite/result.txx')
-rw-r--r-- | odb/sqlite/result.txx | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/odb/sqlite/result.txx b/odb/sqlite/result.txx new file mode 100644 index 0000000..a7f00e0 --- /dev/null +++ b/odb/sqlite/result.txx @@ -0,0 +1,120 @@ +// file : odb/sqlite/result.txx +// author : Boris Kolpackov <boris@codesynthesis.com> +// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC +// license : GNU GPL v2; see accompanying LICENSE file + +#include <odb/exceptions.hxx> + +namespace odb +{ + namespace sqlite + { + template <typename T> + result_impl<T>:: + ~result_impl () + { + } + + template <typename T> + result_impl<T>:: + result_impl (const query& q, + details::shared_ptr<select_statement> st, + object_statements<object_type>& sts) + : odb::result_impl<T> (sts.connection ().database ()), + result_impl_base (q, st), + statements_ (sts) + { + } + + template <typename T> + void result_impl<T>:: + load (object_type& obj) + { + load_image (); + + // This is a top-level call so the statements cannot be locked. + // + assert (!statements_.locked ()); + typename object_statements<object_type>::auto_lock l (statements_); + + typename object_traits::image_type& im (statements_.image ()); + object_traits::init (obj, im, this->database ()); + + // Initialize the id image and load the rest of the object + // (containers, etc). + // + object_traits::init (statements_.id_image (), object_traits::id (im)); + object_traits::load_ (statements_, obj); + + statements_.load_delayed (); + l.unlock (); + } + + template <typename T> + typename result_impl<T>::id_type result_impl<T>:: + load_id () + { + load_image (); + return object_traits::id (statements_.image ()); + } + + template <typename T> + void result_impl<T>:: + next () + { + this->current (pointer_type ()); + + if (!statement_->next ()) + this->end_ = true; + } + + template <typename T> + void result_impl<T>:: + load_image () + { + // The image can grow between calls to load() as a result of other + // statements execution. + // + typename object_traits::image_type& im (statements_.image ()); + + if (im.version != statements_.out_image_version ()) + { + binding& b (statements_.out_image_binding ()); + object_traits::bind (b.bind, im, true); + statements_.out_image_version (im.version); + b.version++; + } + + select_statement::result r (statement_->load ()); + + if (r == select_statement::truncated) + { + object_traits::grow (im, statements_.out_image_truncated ()); + + if (im.version != statements_.out_image_version ()) + { + binding& b (statements_.out_image_binding ()); + object_traits::bind (b.bind, im, true); + statements_.out_image_version (im.version); + b.version++; + statement_->reload (); + } + } + } + + template <typename T> + void result_impl<T>:: + cache () + { + } + + template <typename T> + std::size_t result_impl<T>:: + size () + { + // @@ Should we rather throw unsupported_operation or some such? + // + throw result_not_cached (); + } + } +} |