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+// Copyright 2011 The Kyua Authors.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+//   notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+//   notice, this list of conditions and the following disclaimer in the
+//   documentation and/or other materials provided with the distribution.
+// * Neither the name of Google Inc. nor the names of its contributors
+//   may be used to endorse or promote products derived from this software
+//   without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+/// \file store/read_transaction.hpp
+/// Implementation of read-only transactions on the backend.
+
+#if !defined(STORE_READ_TRANSACTION_HPP)
+#define STORE_READ_TRANSACTION_HPP
+
+#include "store/read_transaction_fwd.hpp"
+
+extern "C" {
+#include <stdint.h>
+}
+
+#include <memory>
+#include <string>
+
+#include "model/context_fwd.hpp"
+#include "model/test_program_fwd.hpp"
+#include "model/test_result_fwd.hpp"
+#include "store/read_backend_fwd.hpp"
+#include "store/read_transaction_fwd.hpp"
+#include "utils/datetime_fwd.hpp"
+
+namespace store {
+
+
+namespace detail {
+
+
+model::test_program_ptr get_test_program(read_backend&, const int64_t);
+
+
+}  // namespace detail
+
+
+/// Iterator for the set of test case results that are part of an action.
+///
+/// \todo Note that this is not a "standard" C++ iterator.  I have chosen to
+/// implement a different interface because it makes things easier to represent
+/// an SQL statement state.  Rewrite as a proper C++ iterator, inheriting from
+/// std::iterator.
+class results_iterator {
+    struct impl;
+
+    /// Pointer to the shared internal implementation.
+    std::shared_ptr< impl > _pimpl;
+
+    friend class read_transaction;
+    results_iterator(std::shared_ptr< impl >);
+
+public:
+    ~results_iterator(void);
+
+    results_iterator& operator++(void);
+    operator bool(void) const;
+
+    const model::test_program_ptr test_program(void) const;
+    std::string test_case_name(void) const;
+    model::test_result result(void) const;
+    utils::datetime::timestamp start_time(void) const;
+    utils::datetime::timestamp end_time(void) const;
+
+    std::string stdout_contents(void) const;
+    std::string stderr_contents(void) const;
+};
+
+
+/// Representation of a read-only transaction.
+///
+/// Transactions are the entry place for high-level calls that access the
+/// database.
+class read_transaction {
+    struct impl;
+
+    /// Pointer to the shared internal implementation.
+    std::shared_ptr< impl > _pimpl;
+
+    friend class read_backend;
+    read_transaction(read_backend&);
+
+public:
+    ~read_transaction(void);
+
+    void finish(void);
+
+    model::context get_context(void);
+    results_iterator get_results(void);
+};
+
+
+}  // namespace store
+
+#endif  // !defined(STORE_READ_TRANSACTION_HPP)