java - Bulider Design Pattern to make generic method for methods having large number of parameters -


i have interface itest , classa & classb implementing interface. testa & testb methods in these classes respectively. 

testa(string a, string b, string c, d d, e e)  testb(string a, string b, string c, f f, g g)

here d, e, f, g custom data types (related databases). simplified methods have more number of parameters.

i need make generic method in testab in itest interface , implement in both classes rather having own method.

testab(string a, string b, string c, d d, e e, f f, g g)

as number of parameters more, generic method testab pain user has pass many null values.

  • is usecase bulider design pattern?

  • if yes, how achieve using design pattern?

yep here use builder pattern. have objects holding information passed methods.

these objects created internal builder, while fields may hold default values. here small example how like.

paramtesta<d, e> parama = new paramtesta<>.builder(a, b, c).setd(d).sete(e).build();  testa(parama);

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