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+// file : common/polymorphism/test3.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST3_HXX
+#define TEST3_HXX
+
+#include <string>
+#include <typeinfo>
+
+#include <odb/core.hxx>
+
+// Test delayed loading.
+//
+#pragma db namespace table("t3_")
+namespace test3
+{
+ #pragma db object polymorphic
+ struct root
+ {
+ virtual ~root () {}
+ root () {}
+ root (unsigned long i): id (i) {}
+
+ #pragma db id
+ unsigned long id;
+
+ virtual bool
+ compare (const root& r, bool tc = true) const
+ {
+ if (tc && typeid (r) != typeid (root))
+ return false;
+
+ return id == r.id;
+ }
+ };
+
+ inline bool
+ operator== (const root& x, const root& y) {return x.compare (y);}
+
+ #pragma db object
+ struct base: root
+ {
+ virtual ~base () {delete rptr;}
+ base (): rptr (0) {}
+ base (unsigned long i, unsigned long n): root (i), num (n), rptr (0) {}
+
+ unsigned long num;
+ root* rptr;
+
+ virtual bool
+ compare (const root& r, bool tc = true) const
+ {
+ if (tc && typeid (r) != typeid (base))
+ return false;
+
+ const base& b (static_cast<const base&> (r));
+ return
+ root::compare (r, false) &&
+ num == b.num &&
+ ((rptr == 0 && b.rptr == 0) || rptr->compare (*b.rptr));
+ }
+ };
+
+ #pragma db object
+ struct derived: base
+ {
+ virtual ~derived () {delete bptr;}
+ derived (): bptr (0) {}
+ derived (unsigned long i, unsigned long n, const std::string& s)
+ : base (i, n), str (s), bptr (0) {}
+
+ std::string str;
+ base* bptr;
+
+ virtual bool
+ compare (const root& r, bool tc = true) const
+ {
+ if (tc && typeid (r) != typeid (derived))
+ return false;
+
+ const derived& d (static_cast<const derived&> (r));
+ return
+ base::compare (r, false) &&
+ str == d.str &&
+ ((bptr == 0 && d.bptr == 0) || bptr->compare (*d.bptr));
+ }
+ };
+
+ // Views.
+ //
+ #pragma db view object(base) object(root = r)
+ struct base_view
+ {
+ #pragma db column(base::id)
+ unsigned long b_id;
+
+ #pragma db column(r::id)
+ unsigned long r_id;
+
+ unsigned long num;
+ };
+
+ #pragma db view \
+ object(derived = d) \
+ object(base = b) \
+ object(root = r: d::rptr)
+ struct derived_view
+ {
+ #pragma db column(d::id)
+ unsigned long d_id;
+
+ #pragma db column(b::id)
+ unsigned long b_id;
+
+ #pragma db column(r::id)
+ unsigned long r_id;
+
+ #pragma db column(d::num)
+ unsigned long d_num;
+
+ #pragma db column(b::num)
+ unsigned long b_num;
+
+ std::string str;
+ };
+
+ // This is an example of a pathological case, where the right-hand-side
+ // of the join condition comes from one of the bases. As a result, we
+ // join the base table first, which means we will get both bases and
+ // derived objects instead of just derived.
+ //
+ //#pragma db view object(root = r) object(derived = d)
+ #pragma db view object(derived = d) object(root = r)
+ struct root_view
+ {
+ #pragma db column(r::id)
+ unsigned long r_id;
+
+ #pragma db column(d::id)
+ unsigned long d_id;
+
+ std::string str;
+ };
+}
+
+#endif // TEST3_HXX