Package org.springframework.data.util

Class KotlinReflectionUtils

java.lang.Object

org.springframework.data.util.KotlinReflectionUtils

public final class KotlinReflectionUtils
extends Object

Reflection utility methods specific to Kotlin reflection. Requires Kotlin classes to be present to avoid linkage errors - ensure to guard usage with KotlinDetector.isKotlinPresent().

Since:

2.3

Author:

Mark Paluch, Christoph Strobl, Johannes Englmeier

See Also:

• KotlinDetector.isKotlinReflectPresent()

Method Summary

Modifier and Type	Method	Description
static kotlin.reflect.KFunction<?>	findKotlinFunction(Method method)	Returns a KFunction instance corresponding to the given Java Method instance, or null if this method cannot be represented by a Kotlin function.
static Class<?>	getReturnType(Method method)	Returns the return type of a Kotlin Method.
static boolean	hasValueClassProperty(Class<?> type)	Returns whether the given class makes uses Kotlin value classes.
static boolean	isDataClass(Class<?> type)	Return true if the specified class is a Kotlin data class.
static boolean	isSupportedKotlinClass(Class<?> type)	Return true if the specified class is a supported Kotlin class.
static boolean	isSuspend(Method method)	Returns whether the Method is declared as suspend (Kotlin Coroutine).
static boolean	isValueClass(kotlin.reflect.KType type)	Returns whether the given KType is a value class.

Methods inherited from class java.lang.Object

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

Method Details

isSupportedKotlinClass

public static boolean isSupportedKotlinClass(Class<?> type)

Return true if the specified class is a supported Kotlin class. Currently supported are only regular Kotlin classes. Other class types (synthetic, SAM, lambdas) are not supported via reflection.

Returns:

true if type is a supported Kotlin class.

isDataClass

public static boolean isDataClass(Class<?> type)

Return true if the specified class is a Kotlin data class.

Returns:

true if type is a Kotlin data class.

Since:

2.5.1

findKotlinFunction

@Nullable
public static kotlin.reflect.KFunction<?> findKotlinFunction(Method method)

Returns a KFunction instance corresponding to the given Java Method instance, or null if this method cannot be represented by a Kotlin function.

Parameters:

method - the method to look up.

Returns:

the KFunction or null if the method cannot be looked up.

isSuspend

public static boolean isSuspend(Method method)

Returns whether the Method is declared as suspend (Kotlin Coroutine).

Parameters:

method - the method to inspect.

Returns:

true if the method is declared as suspend.

See Also:

• KFunction.isSuspend()

getReturnType

public static Class<?> getReturnType(Method method)

Returns the return type of a Kotlin Method. Supports regular and suspended methods.

Parameters:

method - the method to inspect, typically any synthetic JVM Method.

Returns:

return type of the method.

isValueClass

public static boolean isValueClass(kotlin.reflect.KType type)

Returns whether the given KType is a value class.

Parameters:

type - the kotlin type to inspect.

Returns:

true the type is a value class.

Since:

3.2

hasValueClassProperty

public static boolean hasValueClassProperty(Class<?> type)

Returns whether the given class makes uses Kotlin value classes.

Parameters:

type - the kotlin type to inspect.

Returns:

true when at least one property uses Kotlin value classes.

Since:

3.2