Package org.springframework.data.util

Class NullableWrapperConverters

java.lang.Object

org.springframework.data.util.NullableWrapperConverters

public abstract class NullableWrapperConverters
extends Object

Converters to wrap and unwrap nullable wrapper types potentially being available on the classpath. Currently supported:

• java.util.Optional
• com.google.common.base.Optional
• scala.Option
• javaslang.control.Option
• io.vavr.control.Option

Since:

2.4

Author:

Oliver Gierke, Mark Paluch, Christoph Strobl, Maciek Opała, Jens Schauder

Method Summary

Modifier and Type	Method	Description
static boolean	isSingleValue(Class<?> type)
static void	registerConvertersIn(org.springframework.core.convert.converter.ConverterRegistry registry)	Registers converters for wrapper types found on the classpath.
static boolean	supports(Class<?> type)	Returns whether the given type is a supported wrapper type.
static boolean	supportsUnwrapping(Class<?> type)	Returns whether the given wrapper type supports unwrapping.
static Object	unwrap(Object source)	Unwraps the given source value in case it's one of the currently supported wrapper types detected at runtime.
static TypeInformation<?>	unwrapActualType(TypeInformation<?> type)	Recursively unwraps well known wrapper types from the given TypeInformation.

Methods inherited from class java.lang.Object

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

Method Details

supports

public static boolean supports(Class<?> type)

Returns whether the given type is a supported wrapper type.

Parameters:

type - must not be null.

Returns:

supportsUnwrapping

public static boolean supportsUnwrapping(Class<?> type)

Returns whether the given wrapper type supports unwrapping.

Parameters:

type - must not be null.

Returns:

isSingleValue

public static boolean isSingleValue(Class<?> type)

registerConvertersIn

public static void registerConvertersIn(org.springframework.core.convert.converter.ConverterRegistry registry)

Registers converters for wrapper types found on the classpath.

Parameters:

registry - must not be null.

unwrap

@Nullable
public static Object unwrap(@Nullable
 Object source)

Unwraps the given source value in case it's one of the currently supported wrapper types detected at runtime.

Parameters:

source - can be null.

Returns:

unwrapActualType

public static TypeInformation<?> unwrapActualType(TypeInformation<?> type)

Recursively unwraps well known wrapper types from the given TypeInformation.

Parameters:

type - must not be null.

Returns:

will never be null.