Storing objects in map class

[jeet232]

Hi,
I've these classes

Integer derived from Object
String derived from Object

I'm creating another class MyMap
which shall have the capability to store Integer, String (or any other obj derived from 'Object' class) objects in it. MyMap has a data member of stl map.

Can u plz give me a tiny program showing how to store Integer/String objs in MyMap. MyMap is not inherited from anything, it just use stl map as data member. providing an interface to other classes for manipulating stl map easily.

I'm getting into lot of trouble doing this, please help.

[gpraghuram]

Hi,
I've these classes

Integer derived from Object
String derived from Object

I'm creating another class MyMap
which shall have the capability to store Integer, String (or any other obj derived from 'Object' class) objects in it. MyMap has a data member of stl map.

Can u plz give me a tiny program showing how to store Integer/String objs in MyMap. MyMap is not inherited from anything, it just use stl map as data member. providing an interface to other classes for manipulating stl map easily.

I'm getting into lot of trouble doing this, please help.

Check this
[code=cpp]
map<int,string> int_string_map;
string s1("abc");
int_string_map[1]=s1;
int_string_map[2]=s1;


[/code]

Hopw this is what u need

Thanks
Raghuram

[jeet232]

Check this
[code=cpp]
map<int,string> int_string_map;
string s1("abc");
int_string_map[1]=s1;
int_string_map[2]=s1;


[/code]

Hopw this is what u need

Thanks
Raghuram

Hi Raghuram,
thanks for reply, but can u pls tell me how the 'get' functionality will be achieved. like say:

[code=cpp]
map<string,stri ng> str_string_map;
string s1("abc");
[/code]

Then in this case, how the insertion & retreival will work?

[gpraghuram]

Hi Raghuram,
thanks for reply, but can u pls tell me how the 'get' functionality will be achieved. like say:

[code=cpp]
map<string,stri ng> str_string_map;
string s1("abc");
[/code]

Then in this case, how the insertion & retreival will work?

HI,
Read this Map tutorial to get a good idea about the map.
Thanks
Raghuram

[weaknessforcats]

[quote=jeet232]
I've these classes

Integer derived from Object
String derived from Object
[/code]

You have your solution here. MyMap must contain Objects. Plus a key. More to the point, a handle to an Object plus a key:
[code=cpp]
map<int, Handle<Object> > MyMap;
[/code]

1) Read the article on Handle classes.
2) Read the article on Visitor. You will need a Visitor to access specific methods in your derived classes that are not in tyour base class.
3) Your entire application must use Handle<Object>.
4) Get a design patterns book. Look up Template Method. You will need this too.