Need Suggestion for design pattern: Execute set of Actions based on Request

Following is the usecase:

Based on request data, X, Y, Z do following: X, Y, Z can be simple String or some complex structure.

Following is what is needed:

If(X || Y && !Z) do action 1

if(X && !Y) do action 2

if requestData is X - do something specific for X if request Data is Y - do something specific for Y

if(X || Y) do action 3

action 1, action 2 and action 3 are code blocks for execution. Each of them take some input, may modify that input.

What is the best design pattern, that will keep code extensible and modular. I need this in java