Variable Modification: @ModifyVariable

The variable modifier lets you modify an argument when the method is called, as shown below:

@ModifyVariable(method = "methodToInject", at = @At("HEAD"), ordinal = index)
private T injected(T original) {
  //your code
}

ordinal selects which argument to modify. Note: ordinal is counted among arguments matching your method's return type. For example, given public void foo(boolean b, int x, int y, int z) and a returning method of type int with ordinal=1, the target is y rather than x: b is not an int, and the index of y is 1.