Saving objects to disk

[Eagle]

Hi,

I'm sure I learnt this at college but have now forgotten ......

I need to save the following to file:

class Company {
private:
char name[50];
// etc..
Contact* con;
public:
// various accessors and modifiers etc
}

The contact class is a simple name and phone no. stuff.

I can read the Company class (without the Contact pointer) to file
(ios::binary) and read them all back into a linked list. But if I include
the Contact stuff, it is all screwed - prob because I'm storing the pointer
.......

So how does one save to file objects that contain other objects (either via
association or containment ...)?

Thanks

 

[Victor Bazarov]

I'm sure I learnt this at college but have now forgotten ......

I need to save the following to file:

class Company {
private:
char name[50];
// etc..
Contact* con;
public:
// various accessors and modifiers etc
}

The contact class is a simple name and phone no. stuff.

I can read the Company class (without the Contact pointer) to file
(ios::binary) and read them all back into a linked list. But if I include
the Contact stuff, it is all screwed - prob because I'm storing the pointer
......

So how does one save to file objects that contain other objects (either via
association or containment ...)?

My guess would be that one needs to provide a special way. Have you
read the FAQ section on serialisation? It's a new section. Please
do take a look. http://www.parashift.com/c++-faq-lite/

Victor

 

[Default User]

So how does one save to file objects that contain other objects (either via
association or containment ...)?

Serialization, read all about it:


http://www.parashift.com/c++-faq-lite/serialization.html




Brian Rodenborn

 

[Eagle]

Serialization, read all about it:


http://www.parashift.com/c++-faq-lite/serialization.html




Brian Rodenborn

Thanks guys ... will do ... I thought serialisation was only available in
Java .....

 

[Chris Theis]

(either

Thanks guys ... will do ... I thought serialisation was only available in
Java .....

Nope, serialization is rather a concept than a language specific feature.

Chris