java - Pseudo-Backwards Builder Pattern? -

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in legacy codebase have large class far many fields/responsibilities. imagine pizza object.

it has highly granular fields like:

  • haspepperoni
  • hassausage
  • hasbellpeppers

i know when these 3 fields true, have supreme pizza. however, class not open extension or change, can't add pizzatype, or issupreme(), etc. folks throughout codebase duplicate same if(a && b && c) issupreme) logic on place. issue comes quite few concepts, i'm looking way deconstruct object many subobjects, e.g. pseudo-backwards builder pattern.

pizzatype pizzatype = pizzaunbuilder.buildpizzatype(pizza); //pizzatype.supreme  dough dough = pizzaunbuilder.builddough(pizza);

is right approach? pattern exist already?

how adapter pattern?

basically wrapper class has functionality want can go , forth pizza class.

menupizza mypizza = new menupizza(pizza); pizzatype pizzatype = mypizza.getpizzatype(); doughtype doughtype = mypizza.getdoughtype();

and provide reverse functionality...

menupizza otherpizza = new menupizza(pizzatype.supreme, doughtype.sour); pizza pizzapojo = otherpizza.getpizzapojo();

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