javax.validation.valueextraction

Annotation Type ExtractedValue

@Retention(value=RUNTIME)
 @Target(value=TYPE_USE)
 @Documented
public @interface ExtractedValue

Marks the type parameter of a generic container type to which a ValueExtractor is tied or specifies the type of the wrapped element(s) of non-generic container types.

Must be given exactly once for a value extractor type.

Since:

2.0

Author:

Gunnar Morling, Guillaume Smet

See Also:

ValueExtractor

Optional Element Summary

Optional Elements

Modifier and Type	Optional Element and Description
Class<?>	type The type of the value extracted by the ValueExtractor.

Element Detail

type

public abstract Class<?> type

The type of the value extracted by the ValueExtractor. If not set, the type will be automatically inferred from the type argument of the parameterized type.

Used to define value extractors for non-generic wrapper types e.g. OptionalInt.

May not be used when ExtractedValue is defined on the type parameter of a generic container type. A ValueExtractorDefinitionException will be thrown in this case.

Returns:

the type of the value extracted by the value extractor

Default:

void.class