diff options
Diffstat (limited to 'composite')
| -rw-r--r-- | composite/README | 17 | ||||
| -rw-r--r-- | composite/driver.cxx | 11 | ||||
| -rw-r--r-- | composite/person.hxx | 63 |
3 files changed, 76 insertions, 15 deletions
diff --git a/composite/README b/composite/README index e33e7a9..2368784 100644 --- a/composite/README +++ b/composite/README @@ -1,16 +1,17 @@ This example shows how to use composite value types as data members in objects -and other value types, as element types in containers, and as base types for -other composite value types. It also shows how to use composite value type -data members in queries. +(including as object id members) and other value types, as element types in +containers, and as base types for other composite value types. It also shows +how to use composite value type data members in queries. The example consists of the following files: person.hxx - Header file defining the 'basic_name', 'name_extras', and 'name' composite - value types. It also defines the 'phone_numbers' composite value type as - an instantiation of the 'std::pair' class template. Finally it defines - the 'person' persistent class which uses the 'name' and 'phone_numbers' - value types in its data members. + Header file defining the 'basic_name', 'name_extras', 'name', and + 'email_address' composite value types. It also defines the 'phone_numbers' + composite value type as an instantiation of the 'std::pair' class template + Finally it defines the 'person' persistent class which uses 'email_address' + as its object id as well as 'name' and 'phone_numbers' in its other data + members. person-odb.hxx person-odb.ixx diff --git a/composite/driver.cxx b/composite/driver.cxx index cb77acd..aaedf17 100644 --- a/composite/driver.cxx +++ b/composite/driver.cxx @@ -24,9 +24,13 @@ main (int argc, char* argv[]) // Create a person object. // - unsigned int id; + email_address id; { - person p ("Joe", "Dirt", "Mr", phone_numbers ("555 5555", "666 6666")); + person p ("joe@example.com", + "Joe", + "Dirt", + "Mr", + phone_numbers ("555 5555", "666 6666")); transaction t (db->begin ()); id = db->persist (p); @@ -57,7 +61,8 @@ main (int argc, char* argv[]) name& n (joe->name ()); - cout << n.title () << " " << n.first () << " " << n.last () << endl; + cout << n.title () << " " << n.first () << " " << n.last () << " " + << '<' << joe->email ().address () << '>' << endl; name_extras& ne (n.extras ()); diff --git a/composite/person.hxx b/composite/person.hxx index 4496180..c80e2d8 100644 --- a/composite/person.hxx +++ b/composite/person.hxx @@ -129,16 +129,71 @@ private: typedef std::pair<std::string, std::string> phone_numbers; #pragma db value(phone_numbers) +// We can also use a composite value type as an object id. +// +#pragma db value +class email_address +{ +public: + email_address () {} + email_address (const std::string& address) + { + std::string::size_type p (address.find ('@')); + recipient_.assign (address, 0, p); + domain_.assign (address, p + 1, std::string::npos); + } + + const std::string& + recipient () const + { + return recipient_; + } + + const std::string& + domain () const + { + return domain_; + } + + std::string + address () const + { + return recipient_ + '@' + domain_; + } + +private: + friend class odb::access; + + std::string recipient_; + std::string domain_; +}; + +inline bool +operator< (const email_address& x, const email_address& y) +{ + return x.recipient () < y.recipient () || + (x.recipient () == y.recipient () && x.domain() < y.domain ()); +} + #pragma db object class person { public: - person (const std::string& first, + person (const std::string& email, + const std::string& first, const std::string& last, const std::string& title, const phone_numbers& phone) - : name_ (first, last, title), phone_ (phone) + : email_ (email), name_ (first, last, title), phone_ (phone) + { + } + + // Email address. + // + const email_address& + email () const { + return email_; } // Name. @@ -170,8 +225,8 @@ private: person (): name_ ("", "", "") {} - #pragma db id auto - unsigned long id_; + #pragma db id + email_address email_; name_type name_; phone_numbers phone_; |