Package io.deephaven.integrations.python

Class JavaLambdaFactory

java.lang.Object

io.deephaven.integrations.python.JavaLambdaFactory

public class JavaLambdaFactory
extends Object

Tool to wrap Python Callables into Java functional interfaces. Useful for Java-aware Python code to implement Java functional interfaces to pass callbacks/handlers/etc to Python-oblivious Java APIs.

Constructor Summary

Constructors

Constructor	Description
JavaLambdaFactory()

Method Summary

Modifier and Type	Method	Description
static <T> T	create(Class<T> samInterface, org.jpy.PyObject callable, Class<?> coerceToType)	Wraps a python callable in a java functional interface, with an optional extra step to coerce a returned value to handle Deephaven nulls.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

JavaLambdaFactory

public JavaLambdaFactory()

Method Details

create

public static <T> T create(Class<T> samInterface,
 org.jpy.PyObject callable,
 @Nullable
 Class<?> coerceToType)

Wraps a python callable in a java functional interface, with an optional extra step to coerce a returned value to handle Deephaven nulls.

Type Parameters:

T - the type of the lambda to return

Parameters:

samInterface - the Java interface to wrap the callable in. If this has more than one abstract method, an exception will be thrown.

callable - The Python Callable to wrap

coerceToType - An optional, expected return type for the Callable to return.

Returns:

a Java functional interface implementation