On Sat, Jun 11, 2022, 18:02 Gilles Sadowski <[email protected]> wrote:
> I have a hard time figuring out whether these bits of code are
> intended to become the application developer API...
> What data-structure(s) will be visible (from the application)?
> What will be hidden ("implementation details")?
>
Developer API will look something like this
//1) Static methods to initialize array from external forms
ComplexDoubleArray a = ComplexDoubleArray.fromBuffer(Double Buffer);
ComplexDoubleArray b = ComplexDoubleArray.fromArray(double[]);
ComplexDoubleArray c = ComplexDoubleArray.parseFile(File);
//2) Methods on Array interface for complex operations. One for each
functional interface type.. unary, binary, scalar operations
@FunctionalInterface
interface ComplexDoubleUnaryOperator {
ComplexDoubleArray apply(ComplexDoubleArray input, ComplexDoubleArray
result);
}
interface ComplexDoubleArray {
int size();
//MutableComplexDoubleArray extends ComplexDoubleArray with setter,
mutation and static methods to allocate capacity
MutableComplexDoubleArray asMutable();
ComplexDoubleArray asImmutable();
default boolean isImmutable() { return true;}
default ComplexDoubleArray apply(ComplexDoubleUnaryOperator op){
return op.apply(this, result);
}
. . .
}
//Function interfaces behavior - If output array is immutable, operations
return a copy, else result is applied in place on the passed in output and
returned
//3 Developer API usage of complex operations on complex arrays
ComplexDoubleArray a = init();
a = a.asImmutable();
ComplexDoubleArray r1 = a.apply(ComplexFunctions::exp);
ComplexDoubleArray r2 = a.apply(ComplexParrallelStreamFunctions::exp);
ComplexDoubleArray r3 = a.apply(ComplexVectorFunctions::exp);
ComplexDoubleArray r4 = a.apply(ComplexJTransformFunctions::forward_fft);
// 4 ComplexFunctions can provide commons C99 reference implementations
for supported complex operations as static methods that match the
functional interfaces. ( Refactored methods from existing Complex class).
Third parties can provide alternate implementations such as parallel stream
or vector based implementations and used by developers as above.
//5 the above functions also reused with existing Complex class?
Complex implements ComplexDouble, ComplexDoubleArray {
@Override
public int size() {return 1;}
@Override
double [] toDoubleArray() { . . . }
. . .
//Refactored instance methods of Complex class
public Complex exp() {
return apply(ComplexFunctions::exp);
}
. . .
}
Complex c = Complex.ofCartesian(r,i);
//Backward compatible C99 implementation
Complex expc = c.exp();
Complex thirdparty_exp = c.apply(SomeThirdPartyFunctions::exp);
//Require Java16+
Complex vectorexp = c.apply(Complex VectorFunctions::exp)
Thanks,
Sumanth
