aboutsummaryrefslogtreecommitdiff
path: root/pimpl
diff options
context:
space:
mode:
Diffstat (limited to 'pimpl')
-rw-r--r--pimpl/README53
-rw-r--r--pimpl/database.hxx92
-rw-r--r--pimpl/driver.cxx52
-rw-r--r--pimpl/makefile118
-rw-r--r--pimpl/person.cxx71
-rw-r--r--pimpl/person.hxx56
6 files changed, 442 insertions, 0 deletions
diff --git a/pimpl/README b/pimpl/README
new file mode 100644
index 0000000..6c9f4b0
--- /dev/null
+++ b/pimpl/README
@@ -0,0 +1,53 @@
+This example shows how to use virtual data members to implement a persistent
+class that employes the pimpl C++ idiom.
+
+The example consists of the following files:
+
+person.hxx
+person.cxx
+ Header and source file implementing the 'person' persistent class that
+ uses the pimpl idiom.
+
+person-odb.hxx
+person-odb.ixx
+person-odb.cxx
+person.sql
+ The first three files contain the database support code and the last file
+ contains the database schema for the person.hxx header.
+
+ These files are generated by the ODB compiler from person.hxx using the
+ following command line:
+
+ odb -d <database> --generate-query --generate-schema person.hxx
+
+ Where <database> stands for the database system we are using, for example,
+ 'mysql'.
+
+database.hxx
+ Contains the create_database() function which instantiates the concrete
+ database class corresponding to the database system we are using.
+
+driver.cxx
+ Driver for the example. It includes the person.hxx and person-odb.hxx
+ headers to gain access to the persistent class and its database support
+ code. It also includes database.hxx for the create_database() function
+ declaration.
+
+ In main() the driver first calls create_database() to obtain the database
+ instance. Then it executes a number of database transactions on the 'person'
+ objects.
+
+To run the example we may first need to create the database schema (for some
+database systems, such as SQLite, the schema is embedded into the generated
+code which makes this step unnecessary). Using MySQL as an example, this
+can be achieved with the following command:
+
+mysql --user=odb_test --database=odb_test < person.sql
+
+Here we use 'odb_test' as the database login and also 'odb_test' as the
+database name.
+
+Once the database schema is ready, we can run the example (using MySQL as
+the database):
+
+./driver --user odb_test --database odb_test
diff --git a/pimpl/database.hxx b/pimpl/database.hxx
new file mode 100644
index 0000000..c159128
--- /dev/null
+++ b/pimpl/database.hxx
@@ -0,0 +1,92 @@
+// file : pimpl/database.hxx
+// copyright : not copyrighted - public domain
+
+//
+// Create concrete database instance based on the DATABASE_* macros.
+//
+
+#ifndef DATABASE_HXX
+#define DATABASE_HXX
+
+#include <string>
+#include <memory> // std::auto_ptr
+#include <cstdlib> // std::exit
+#include <iostream>
+
+#include <odb/database.hxx>
+
+#if defined(DATABASE_MYSQL)
+# include <odb/mysql/database.hxx>
+#elif defined(DATABASE_SQLITE)
+# include <odb/connection.hxx>
+# include <odb/transaction.hxx>
+# include <odb/schema-catalog.hxx>
+# include <odb/sqlite/database.hxx>
+#elif defined(DATABASE_PGSQL)
+# include <odb/pgsql/database.hxx>
+#elif defined(DATABASE_ORACLE)
+# include <odb/oracle/database.hxx>
+#elif defined(DATABASE_MSSQL)
+# include <odb/mssql/database.hxx>
+#endif
+
+inline std::auto_ptr<odb::database>
+create_database (int& argc, char* argv[])
+{
+ using namespace std;
+ using namespace odb::core;
+
+ if (argc > 1 && argv[1] == string ("--help"))
+ {
+ cout << "Usage: " << argv[0] << " [options]" << endl
+ << "Options:" << endl;
+
+#if defined(DATABASE_MYSQL)
+ odb::mysql::database::print_usage (cout);
+#elif defined(DATABASE_SQLITE)
+ odb::sqlite::database::print_usage (cout);
+#elif defined(DATABASE_PGSQL)
+ odb::pgsql::database::print_usage (cout);
+#elif defined(DATABASE_ORACLE)
+ odb::oracle::database::print_usage (cout);
+#elif defined(DATABASE_MSSQL)
+ odb::mssql::database::print_usage (cout);
+#endif
+
+ exit (0);
+ }
+
+#if defined(DATABASE_MYSQL)
+ auto_ptr<database> db (new odb::mysql::database (argc, argv));
+#elif defined(DATABASE_SQLITE)
+ auto_ptr<database> db (
+ new odb::sqlite::database (
+ argc, argv, false, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE));
+
+ // Create the database schema. Due to bugs in SQLite foreign key
+ // support for DDL statements, we need to temporarily disable
+ // foreign keys.
+ //
+ {
+ connection_ptr c (db->connection ());
+
+ c->execute ("PRAGMA foreign_keys=OFF");
+
+ transaction t (c->begin ());
+ schema_catalog::create_schema (*db);
+ t.commit ();
+
+ c->execute ("PRAGMA foreign_keys=ON");
+ }
+#elif defined(DATABASE_PGSQL)
+ auto_ptr<database> db (new odb::pgsql::database (argc, argv));
+#elif defined(DATABASE_ORACLE)
+ auto_ptr<database> db (new odb::oracle::database (argc, argv));
+#elif defined(DATABASE_MSSQL)
+ auto_ptr<database> db (new odb::mssql::database (argc, argv));
+#endif
+
+ return db;
+}
+
+#endif // DATABASE_HXX
diff --git a/pimpl/driver.cxx b/pimpl/driver.cxx
new file mode 100644
index 0000000..b97fd92
--- /dev/null
+++ b/pimpl/driver.cxx
@@ -0,0 +1,52 @@
+// file : pimpl/driver.cxx
+// copyright : not copyrighted - public domain
+
+#include <memory> // std::auto_ptr
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include "database.hxx" // create_database
+
+#include "person.hxx"
+#include "person-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+ try
+ {
+ auto_ptr<database> db (create_database (argc, argv));
+
+ {
+ person john ("john@doe.com", "John Doe", 31);
+ person jane ("jane@doe.com", "Jane Doe", 29);
+
+ transaction t (db->begin ());
+ db->persist (john);
+ db->persist (jane);
+ t.commit ();
+ }
+
+ {
+ typedef odb::result<person> result;
+
+ transaction t (db->begin ());
+ result r (db->query<person> ());
+
+ for (result::iterator i (r.begin ()); i != r.end (); ++i)
+ cout << i->name () << ' ' << i->email () << ' ' << i->age () << endl;
+
+ t.commit ();
+ }
+ }
+ catch (const odb::exception& e)
+ {
+ cerr << e.what () << endl;
+ return 1;
+ }
+}
diff --git a/pimpl/makefile b/pimpl/makefile
new file mode 100644
index 0000000..5c826f3
--- /dev/null
+++ b/pimpl/makefile
@@ -0,0 +1,118 @@
+# file : pimpl/makefile
+# copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+# license : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../build/bootstrap.make
+
+cxx_tun := driver.cxx person.cxx
+odb_hdr := person.hxx
+cxx_obj := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o) $(odb_hdr:.hxx=-odb.o))
+cxx_od := $(cxx_obj:.o=.o.d)
+
+driver := $(out_base)/driver
+dist := $(out_base)/.dist
+test := $(out_base)/.test
+clean := $(out_base)/.clean
+
+# Import.
+#
+$(call import,\
+ $(scf_root)/import/odb/stub.make,\
+ odb: odb,odb-rules: odb_rules)
+
+$(call import,\
+ $(scf_root)/import/libodb/stub.make,\
+ l: odb.l,cpp-options: odb.l.cpp-options)
+
+ifdef db_id
+$(call import,\
+ $(scf_root)/import/libodb-$(db_id)/stub.make,\
+ l: odb_db.l,cpp-options: odb_db.l.cpp-options)
+endif
+
+ifeq ($(odb_db.l.cpp-options),)
+odb_db.l.cpp-options := $(out_base)/.unbuildable
+endif
+
+# Build.
+#
+$(driver): $(cxx_obj) $(odb_db.l) $(odb.l)
+$(cxx_obj) $(cxx_od): cpp_options := -I$(out_base) -I$(src_base) -D$(db_macro)
+$(cxx_obj) $(cxx_od): $(odb.l.cpp-options) $(odb_db.l.cpp-options)
+
+genf := $(addprefix $(odb_hdr:.hxx=-odb),.hxx .ixx .cxx) $(odb_hdr:.hxx=.sql)
+gen := $(addprefix $(out_base)/,$(genf))
+
+$(gen): $(odb)
+$(gen): odb := $(odb)
+$(gen) $(dist): export odb_options += --database $(db_id) --generate-schema \
+--generate-query --table-prefix pimpl_
+$(gen): cpp_options := -I$(src_base)
+$(gen): $(odb.l.cpp-options)
+
+$(call include-dep,$(cxx_od),$(cxx_obj),$(gen))
+
+# Alias for default target.
+#
+$(out_base)/: $(driver)
+
+# Dist
+#
+name := $(subst /,-,$(subst $(src_root)/,,$(src_base)))
+
+$(dist): db_id := @database@
+$(dist): sources := $(cxx_tun)
+$(dist): headers := $(odb_hdr)
+$(dist): export name := $(name)
+$(dist): export odb_header_stem := $(basename $(odb_hdr))
+$(dist): export extra_dist := README $(call vc9projs,$(name)) \
+$(call vc10projs,$(name))
+$(dist):
+ $(call dist-data,$(sources) $(headers) README database.hxx)
+ $(call meta-automake,../template/Makefile.am)
+ $(call meta-vc9projs,../template/template,$(name))
+ $(call meta-vc10projs,../template/template,$(name))
+
+# Test.
+#
+$(test): header := $(odb_hdr)
+$(test): $(driver)
+ $(call schema)
+ $(call message,test $<,$< --options-file $(dcf_root)/db.options)
+
+# Clean.
+#
+$(clean): \
+ $(driver).o.clean \
+ $(addsuffix .cxx.clean,$(cxx_obj)) \
+ $(addsuffix .cxx.clean,$(cxx_od)) \
+ $(addprefix $(out_base)/,$(odb_hdr:.hxx=-odb.cxx.hxx.clean))
+
+# Generated .gitignore.
+#
+ifeq ($(out_base),$(src_base))
+$(driver): | $(out_base)/.gitignore
+
+$(out_base)/.gitignore: files := driver $(genf)
+$(clean): $(out_base)/.gitignore.clean
+
+$(call include,$(bld_root)/git/gitignore.make)
+endif
+
+# How to.
+#
+$(call include,$(bld_root)/dist.make)
+$(call include,$(bld_root)/meta/vc9proj.make)
+$(call include,$(bld_root)/meta/vc10proj.make)
+$(call include,$(bld_root)/meta/automake.make)
+
+$(call include,$(bld_root)/cxx/standard.make) # cxx_standard
+ifdef cxx_standard
+$(gen): odb_options += --std $(cxx_standard)
+$(call include,$(odb_rules))
+endif
+
+$(call include,$(bld_root)/cxx/cxx-d.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
+$(call include,$(bld_root)/cxx/o-e.make)
+
diff --git a/pimpl/person.cxx b/pimpl/person.cxx
new file mode 100644
index 0000000..6922afc
--- /dev/null
+++ b/pimpl/person.cxx
@@ -0,0 +1,71 @@
+// file : pimpl/person.cxx
+// copyright : not copyrighted - public domain
+
+#include "person.hxx"
+
+using namespace std;
+
+struct person::impl
+{
+ impl () {}
+ impl (const string& e, const string& n, unsigned short a)
+ : email (e), name (n), age (a) {}
+
+ string email;
+ string name;
+ unsigned short age;
+};
+
+person::
+~person ()
+{
+ delete pimpl_;
+}
+
+person::
+person ()
+ : pimpl_ (new impl)
+{
+}
+
+person::
+person (const string& e, const string& n, unsigned short a)
+ : pimpl_ (new impl (e, n, a))
+{
+}
+
+const string& person::
+email () const
+{
+ return pimpl_->email;
+}
+
+void person::
+email (const string& e)
+{
+ pimpl_->email = e;
+}
+
+const string& person::
+name () const
+{
+ return pimpl_->name;
+}
+
+void person::
+name (const string& n)
+{
+ pimpl_->name = n;
+}
+
+unsigned short person::
+age () const
+{
+ return pimpl_->age;
+}
+
+void person::
+age (unsigned short a) const
+{
+ pimpl_->age = a;
+}
diff --git a/pimpl/person.hxx b/pimpl/person.hxx
new file mode 100644
index 0000000..d296c28
--- /dev/null
+++ b/pimpl/person.hxx
@@ -0,0 +1,56 @@
+// file : pimpl/person.hxx
+// copyright : not copyrighted - public domain
+
+#ifndef PERSON_HXX
+#define PERSON_HXX
+
+#include <string>
+
+#include <odb/core.hxx>
+
+#pragma db object
+class person
+{
+public:
+ ~person ();
+ person (const std::string& email,
+ const std::string& name,
+ unsigned short age);
+
+ const std::string&
+ email () const;
+
+ void
+ email (const std::string&);
+
+ const std::string&
+ name () const;
+
+ void
+ name (const std::string&);
+
+ unsigned short
+ age () const;
+
+ void
+ age (unsigned short) const;
+
+private:
+ person (const person&);
+ person& operator= (const person&);
+
+private:
+ friend class odb::access;
+ person ();
+
+ struct impl;
+
+ #pragma db transient
+ impl* pimpl_;
+
+ #pragma db member(email) virtual(std::string) id
+ #pragma db member(name) virtual(std::string)
+ #pragma db member(age) virtual(unsigned short)
+};
+
+#endif // PERSON_HXX
generated by cgit v1.1 at 2024-11-03 20:38:01 +0000