From ab51fa65f9e8cad4ef5a1db85029dfe6404e9a1f Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 13 Jan 2011 11:31:14 +0200
Subject: Add composite, relationship, and inverse examples

All add the TR1 <memory> test for the latter two examples.
---
 inverse/employee.hxx | 275 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 275 insertions(+)
 create mode 100644 inverse/employee.hxx

(limited to 'inverse/employee.hxx')

diff --git a/inverse/employee.hxx b/inverse/employee.hxx
new file mode 100644
index 0000000..915b561
--- /dev/null
+++ b/inverse/employee.hxx
@@ -0,0 +1,275 @@
+// file      : inverse/employee.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : not copyrighted - public domain
+
+#ifndef EMPLOYEE_HXX
+#define EMPLOYEE_HXX
+
+#include <vector>
+#include <string>
+
+#include <odb/core.hxx>
+
+// Include TR1 <memory> header in a compiler-specific fashion. Fall back
+// on the Boost implementation if the compiler does not support TR1.
+//
+#include <odb/tr1/memory.hxx>
+
+#include <odb/tr1/lazy-ptr.hxx>
+
+using std::tr1::shared_ptr;
+
+using odb::tr1::lazy_shared_ptr;
+using odb::tr1::lazy_weak_ptr;
+
+// The "pointer architecture" in this object model is as follows: All
+// object pointers are lazy. The employee class holds shared pointers
+// to employer, position, and projects. All other objects hold weak
+// pointers back to the employee object. The weak sides are also the
+// ones that are made inverse.
+//
+// The following bidirectional relationships are used:
+//
+// many-to-one  : employee <--> employer
+// one-to-one   : employee <--> position
+// many-to-many : employee <--> project
+//
+
+// Forward declarations.
+//
+class employer;
+class position;
+class project;
+class employee;
+
+typedef std::vector<lazy_shared_ptr<project> > projects;
+typedef std::vector<lazy_weak_ptr<employee> > employees;
+
+#pragma db object
+class employer
+{
+public:
+  employer (const std::string& name)
+      : name_ (name)
+  {
+  }
+
+  const std::string&
+  name () const
+  {
+    return name_;
+  }
+
+  // Employees of this employer.
+  //
+  typedef ::employees employees_type;
+
+  const employees_type&
+  employees () const
+  {
+    return employees_;
+  }
+
+  employees_type&
+  employees ()
+  {
+    return employees_;
+  }
+
+private:
+  friend class odb::access;
+
+  employer () {}
+
+  #pragma db id
+  std::string name_;
+
+  #pragma db not_null inverse(employer_)
+  employees_type employees_;
+};
+
+#pragma db object
+class position
+{
+public:
+  position (const std::string& title)
+      : title_ (title)
+  {
+  }
+
+  const std::string&
+  title () const
+  {
+    return title_;
+  }
+
+  // Employee that fills this position. NULL if the position is vacant.
+  //
+  typedef ::employee employee_type;
+
+  const lazy_weak_ptr<employee_type>&
+  employee () const
+  {
+    return employee_;
+  }
+
+  void
+  employee (lazy_weak_ptr<employee_type> employee)
+  {
+    employee_ = employee;
+  }
+
+private:
+  friend class odb::access;
+
+  position () {}
+
+  #pragma db id auto
+  unsigned long id_;
+
+  std::string title_;
+
+  #pragma db inverse(position_)
+  lazy_weak_ptr<employee_type> employee_;
+};
+
+#pragma db object
+class project
+{
+public:
+  project (const std::string& name)
+      : name_ (name)
+  {
+  }
+
+  const std::string&
+  name () const
+  {
+    return name_;
+  }
+
+  // Employees working on this project.
+  //
+  typedef ::employees employees_type;
+
+  const employees_type&
+  employees () const
+  {
+    return employees_;
+  }
+
+  employees_type&
+  employees ()
+  {
+    return employees_;
+  }
+
+private:
+  friend class odb::access;
+
+  project () {}
+
+  #pragma db id
+  std::string name_;
+
+  #pragma db not_null inverse(projects_)
+  employees_type employees_;
+};
+
+#pragma db object
+class employee
+{
+public:
+  typedef ::employer employer_type;
+  typedef ::position position_type;
+
+  employee (const std::string& first,
+            const std::string& last,
+            lazy_shared_ptr<employer_type> employer,
+            lazy_shared_ptr<position_type> position)
+      : first_ (first), last_ (last),
+        employer_ (employer),
+        position_ (position)
+  {
+  }
+
+  // Name.
+  //
+  const std::string&
+  first () const
+  {
+    return first_;
+  }
+
+  const std::string&
+  last () const
+  {
+    return last_;
+  }
+
+  // Employer.
+  //
+  const lazy_shared_ptr<employer_type>&
+  employer () const
+  {
+    return employer_;
+  }
+
+  void
+  employer (lazy_shared_ptr<employer_type> employer)
+  {
+    employer_ = employer;
+  }
+
+  // Position.
+  //
+  const lazy_shared_ptr<position_type>&
+  position () const
+  {
+    return position_;
+  }
+
+  void
+  position (lazy_shared_ptr<position_type> position)
+  {
+    position_ = position;
+  }
+
+  // Projects.
+  //
+  typedef ::projects projects_type;
+
+  const projects_type&
+  projects () const
+  {
+    return projects_;
+  }
+
+  projects_type&
+  projects ()
+  {
+    return projects_;
+  }
+
+private:
+  friend class odb::access;
+
+  employee () {}
+
+  #pragma db id auto
+  unsigned long id_;
+
+  std::string first_;
+  std::string last_;
+
+  #pragma db not_null
+  lazy_shared_ptr<employer_type> employer_;
+
+  #pragma db not_null
+  lazy_shared_ptr<position_type> position_;
+
+  #pragma db not_null unordered
+  projects_type projects_;
+};
+
+#endif // EMPLOYEE_HXX
-- 
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