Package org.springframework.data.repository.util

Class ReactiveWrapperConverters

java.lang.Object

org.springframework.data.repository.util.ReactiveWrapperConverters

public abstract class ReactiveWrapperConverters
extends Object

Conversion support for reactive wrapper types. This class is a reactive extension to QueryExecutionConverters.

This class discovers reactive wrapper availability and their conversion support based on the class path. Reactive wrapper types might be supported/on the class path but conversion may require additional dependencies.

Since:

2.0

Author:

Mark Paluch, Oliver Gierke, Christoph Strobl, Hantsy Bai

See Also:

• ReactiveWrappers
• ReactiveAdapterRegistry

Method Summary

Modifier and Type	Method	Description
static boolean	canConvert(Class<?> sourceType, Class<?> targetType)	Return true if objects of sourceType can be converted to the targetType.
static <T> T	map(Object reactiveObject, Function<Object,Object> converter)	Maps elements of a reactive element stream to other elements.
static boolean	supports(Class<?> type)	Returns whether the given type is supported for wrapper type conversion.
static <T> T	toWrapper(Object reactiveObject, Class<? extends T> targetWrapperType)	Casts or adopts the given wrapper type to a target wrapper type.
static TypeInformation<?>	unwrapWrapperTypes(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 supported for wrapper type conversion.

NOTE: A reactive wrapper type might be supported in general by ReactiveWrappers.supports(Class) but not necessarily for conversion using this method.

Parameters:

type - must not be null.

Returns:

true if the type is a supported reactive wrapper type.

unwrapWrapperTypes

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

Recursively unwraps well known wrapper types from the given TypeInformation.

Parameters:

type - must not be null.

Returns:

will never be null.

Since:

2.4

toWrapper

@Nullable
public static <T> T toWrapper(Object reactiveObject,
 Class<? extends T> targetWrapperType)

Casts or adopts the given wrapper type to a target wrapper type.

Parameters:

reactiveObject - the stream, must not be null.

targetWrapperType - must not be null.

Returns:

map

public static <T> T map(Object reactiveObject,
 Function<Object,Object> converter)

Maps elements of a reactive element stream to other elements.

Parameters:

reactiveObject - must not be null.

converter - must not be null.

Returns:

canConvert

public static boolean canConvert(Class<?> sourceType,
 Class<?> targetType)

Return true if objects of sourceType can be converted to the targetType.

Parameters:

sourceType - must not be null.

targetType - must not be null.

Returns:

true if a conversion can be performed.