Examples with SpecializedSignature com.facebook.presto.operator.scalar.annotations.ParametricScalarImplementation.SpecializedSignature used on opensource projects

Example 1 with SpecializedSignature

use of com.facebook.presto.operator.scalar.annotations.ParametricScalarImplementation.SpecializedSignature in project presto by prestodb.

the class ScalarFromAnnotationsParser method parseParametricScalar.

private static SqlScalarFunction parseParametricScalar(ScalarHeaderAndMethods scalar, Optional<Constructor<?>> constructor) {
    ScalarImplementationHeader header = scalar.getHeader();
    Map<SpecializedSignature, ParametricScalarImplementation.Builder> signatures = new HashMap<>();
    for (Method method : scalar.getMethods()) {
        ParametricScalarImplementation implementation = ParametricScalarImplementation.Parser.parseImplementation(header, method, constructor);
        if (!signatures.containsKey(implementation.getSpecializedSignature())) {
            ParametricScalarImplementation.Builder builder = new ParametricScalarImplementation.Builder(implementation.getSignature(), implementation.getArgumentNativeContainerTypes(), implementation.getSpecializedTypeParameters(), implementation.getReturnNativeContainerType());
            signatures.put(implementation.getSpecializedSignature(), builder);
            builder.addChoices(implementation);
        } else {
            ParametricScalarImplementation.Builder builder = signatures.get(implementation.getSpecializedSignature());
            builder.addChoices(implementation);
        }
    }
    ParametricImplementationsGroup.Builder<ParametricScalarImplementation> implementationsBuilder = ParametricImplementationsGroup.builder();
    for (ParametricScalarImplementation.Builder implementation : signatures.values()) {
        implementationsBuilder.addImplementation(implementation.build());
    }
    ParametricImplementationsGroup<ParametricScalarImplementation> implementations = implementationsBuilder.build();
    Signature scalarSignature = implementations.getSignature();
    header.getOperatorType().ifPresent(operatorType -> validateOperator(operatorType, scalarSignature.getReturnType(), scalarSignature.getArgumentTypes()));
    return new ParametricScalar(scalarSignature, header.getHeader(), implementations);
}