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+// file : common/view/olv/test4.hxx
+// copyright : Copyright (c) 2009-2015 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST4_HXX
+#define TEST4_HXX
+
+#include <string>
+#include <memory> // shared_ptr
+
+#include <odb/core.hxx>
+
+// Test by-value load.
+//
+#pragma db namespace table("t4_") session
+namespace test4
+{
+ #pragma db object
+ struct object1
+ {
+ object1 (int id_ = 0, int n_ = 0): id (id_), n (n_) {}
+
+ #pragma db id
+ int id;
+
+ int n;
+ };
+
+ #pragma db object
+ struct object2
+ {
+ object2 (int id_ = 0, const char* s_ = "", object1* o1_ = 0)
+ : id (id_), s (s_), o1 (o1_) {}
+
+ #pragma db id
+ int id;
+
+ std::string s;
+ object1* o1; // Shallow copy.
+ };
+
+ typedef object1* object1_ptr;
+ typedef object2* object2_ptr;
+
+ #pragma db view object(object1)
+ struct view1
+ {
+ #pragma db member(o1_) virtual(object1_ptr) get(&this.o1) set()
+
+ #pragma db transient
+ object1 o1;
+ };
+
+ #pragma db view object(object1) transient
+ struct view1a
+ {
+ view1a (): o1_null (true) {}
+
+ #pragma db member(o1_) virtual(object1_ptr) get(&this.o1) \
+ set(this.o1_null = !(?))
+
+ object1 o1;
+ bool o1_null;
+ };
+
+ #pragma db view object(object1)
+ struct view1b
+ {
+ view1b (): o1_p (0) {}
+
+ #pragma db transient
+ object1 o1;
+
+ #pragma db get(&this.o1) set(o1_p = (?))
+ object1* o1_p;
+ };
+
+ #pragma db view object(object1)
+ struct view1c
+ {
+ view1c (object1& o1): o1_p (&o1) {}
+
+ object1* o1_p;
+ };
+
+ #pragma db view object(object1) object(object2) transient
+ struct view2
+ {
+ #pragma db member(o2_) virtual(object2_ptr) get(&this.o2) set()
+ #pragma db member(o1_) virtual(object1_ptr) get(&this.o1) set()
+
+ object1 o1;
+ object2 o2;
+ };
+
+ #pragma db view object(object1) object(object2) transient
+ struct view2a
+ {
+ #pragma db member(o2_) virtual(object2_ptr) get(&this.o2) \
+ set(o2_null = !(?))
+ #pragma db member(o1_) virtual(object1_ptr) get(&this.o1) set()
+
+ object1 o1;
+ object2 o2;
+ bool o2_null;
+ };
+
+ // Test loading into raw pointer with non-raw object pointer.
+ //
+ using std::shared_ptr;
+
+ #pragma db object pointer(shared_ptr)
+ struct object3
+ {
+ object3 (int id_ = 0, int n_ = 0): id (id_), n (n_) {}
+
+ #pragma db id
+ int id;
+
+ int n;
+ };
+
+ #pragma db view object(object3)
+ struct view3
+ {
+ // This view implements the following slightly twisted logic: if the
+ // object is already in the cache, then set o3_p to that. Otherwise,
+ // load it into the by-value instance. We can also check whether o3_p
+ // points to o3 to distinguish between the two outcomes.
+ //
+
+ // Since we may be getting the pointer as both smart and raw, we
+ // need to create a bit of support code to use in the modifier
+ // expression.
+ //
+ void set_o3 (object3* p) {o3_p = p;} // &o3 or NULL.
+ void set_o3 (shared_ptr<object3> p) {o3_p = p.get ();} // From cache.
+
+ #pragma db get(&this.o3) set(set_o3(?))
+ object3* o3_p;
+
+ #pragma db transient
+ object3 o3;
+
+ // Return-by-value support (query_value()).
+ //
+ view3 (): o3_p (0) {}
+ view3 (const view3& x): o3_p (x.o3_p == &x.o3 ? &o3 : x.o3_p), o3 (x.o3) {}
+ };
+}
+
+#endif // TEST4_HXX