Examples with JavaScalarFunctionImplementation com.facebook.presto.spi.function.JavaScalarFunctionImplementation used on opensource projects

Example 11 with JavaScalarFunctionImplementation

use of com.facebook.presto.spi.function.JavaScalarFunctionImplementation in project presto by prestodb.

the class ArrayToArrayCast method specialize.

@Override
public BuiltInScalarFunctionImplementation specialize(BoundVariables boundVariables, int arity, FunctionAndTypeManager functionAndTypeManager) {
    checkArgument(arity == 1, "Expected arity to be 1");
    Type fromType = boundVariables.getTypeVariable("F");
    Type toType = boundVariables.getTypeVariable("T");
    FunctionHandle functionHandle = functionAndTypeManager.lookupCast(CastType.CAST, fromType.getTypeSignature(), toType.getTypeSignature());
    JavaScalarFunctionImplementation function = functionAndTypeManager.getJavaScalarFunctionImplementation(functionHandle);
    Class<?> castOperatorClass = generateArrayCast(functionAndTypeManager, functionAndTypeManager.getFunctionMetadata(functionHandle), function);
    MethodHandle methodHandle = methodHandle(castOperatorClass, "castArray", SqlFunctionProperties.class, Block.class);
    return new BuiltInScalarFunctionImplementation(false, ImmutableList.of(valueTypeArgumentProperty(RETURN_NULL_ON_NULL), valueTypeArgumentProperty(RETURN_NULL_ON_NULL)), methodHandle);
}

Example 12 with JavaScalarFunctionImplementation

use of com.facebook.presto.spi.function.JavaScalarFunctionImplementation in project presto by prestodb.

the class FunctionAndTypeManager method getJavaScalarFunctionImplementation.

public JavaScalarFunctionImplementation getJavaScalarFunctionImplementation(FunctionHandle functionHandle) {
    ScalarFunctionImplementation implementation = getScalarFunctionImplementation(functionHandle);
    checkArgument(implementation instanceof JavaScalarFunctionImplementation, format("Implementation of function %s is not a JavaScalarFunctionImplementation", getFunctionMetadata(functionHandle).getName()));
    return (JavaScalarFunctionImplementation) implementation;
}