java - OOP advice for messaging objects design -


my scenario this:

i have messaging system when dispatch message different destinations message type.

that's current design:

abstract class: messagekindabs  messagekind1 extends messagekindabs   messagekind2 extends messagekindabs messagekind3 extends messagekindabs

and on..

now messagekind3 special kind. it's purpose send content of messagekind1 or messagekind2 log process.

so created inside messagekind3 list of messagekind3items:

list<messagekind3item> messagekind3itemlist...

messagekind3item includes information of messagekind1/messagekind2 logging purposes.

so happens each messagekind3item includes messagekindabs type.

but makes no sense me.

for example: send message db queue , log information messagekind1 holds , messagekind2 holds.

so oop design got bit complicated.

anyone me find way on here?

i have created inside messagekind3item instance type of messagekindabs not sure make sense.

thanks, ray,

i have created inside messagekind3item instance type of messagekindabs not sure make sense.

you can not, it's abstract.

since messagekind3 logging structure known. messagekind3 items create special logitem class instantiated like:

logitem createlogitem(messagekind1) {  return new logitem(); } logitem createlogitem(messagekind2) {  return new logitem(); }

and attach these items messagekind3.

you trying tightly couple classes inheritance , problem lies.


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