org.springframework.data.repository.util

Class QueryExecutionConverters

java.lang.Object

org.springframework.data.repository.util.QueryExecutionConverters

public abstract class QueryExecutionConverters
extends Object

Converters to potentially wrap the execution of a repository method into a variety of wrapper types potentially being available on the classpath. Currently supported:

• java.util.Optional
• com.google.common.base.Optional
• scala.Option - as of 1.12
• java.util.concurrent.Future
• java.util.concurrent.CompletableFuture
• org.springframework.util.concurrent.ListenableFuture<
• javaslang.control.Option - as of 1.13
• javaslang.collection.Seq, javaslang.collection.Map, javaslang.collection.Set - as of 1.13
• io.vavr.collection.Seq, io.vavr.collection.Map, io.vavr.collection.Set - as of 2.0
• Reactive wrappers supported by ReactiveWrappers - as of 2.0

Since:

1.8

Author:

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

See Also:

ReactiveWrappers

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	QueryExecutionConverters.ExecutionAdapter
static interface	QueryExecutionConverters.ThrowingSupplier
static class	QueryExecutionConverters.WrapperType

Method Summary

Modifier and Type	Method and Description
static Set<Class<?>>	getAllowedPageableTypes() Returns the types that are supported on paginating query methods.
static QueryExecutionConverters.ExecutionAdapter	getExecutionAdapter(Class<?> returnType) Returns the QueryExecutionConverters.ExecutionAdapter to be used for the given return type.
static boolean	isSingleValue(Class<?> type)
static void	registerConvertersIn(ConfigurableConversionService conversionService) 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<?>	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 Detail

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)

getAllowedPageableTypes

public static Set<Class<?>> getAllowedPageableTypes()

Returns the types that are supported on paginating query methods. Will include custom collection types of e.g. Javaslang.

Returns:

registerConvertersIn

public static void registerConvertersIn(ConfigurableConversionService conversionService)

Registers converters for wrapper types found on the classpath.

Parameters:

conversionService - 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:

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.

getExecutionAdapter

@Nullable
public static QueryExecutionConverters.ExecutionAdapter getExecutionAdapter(Class<?> returnType)

Returns the QueryExecutionConverters.ExecutionAdapter to be used for the given return type.

Parameters:

returnType - must not be null.

Returns: