/*
 * Bean Validation API
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or <http://www.apache.org/licenses/LICENSE-2.0>.
 */
package javax.validation.valueextraction;

import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.OptionalInt;

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.
Author:
Gunnar Morling, Guillaume Smet
See Also:
ValueExtractor
Since:
2.0/**
 * Marks the type parameter of a generic container type to which a {@link ValueExtractor} is
 * tied or specifies the type of the wrapped element(s) of non-generic container types.
 * <p>
 * Must be given exactly once for a value extractor type.
 *
 * @author Gunnar Morling
 * @author Guillaume Smet
 *
 * @see ValueExtractor
 * @since 2.0
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE_USE)
@Documented
public @interface ExtractedValue {

	
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/**
	 * The type of the value extracted by the {@link ValueExtractor}. If not set, the type
	 * will be automatically inferred from the type argument of the parameterized type.
	 * <p>
	 * Used to define value extractors for non-generic wrapper types e.g.
	 * {@link OptionalInt}.
	 * <p>
	 * May not be used when {@code ExtractedValue} is defined on the type parameter of
	 * a generic container type. A {@code ValueExtractorDefinitionException} will be thrown
	 * in this case.
	 *
	 * @return the type of the value extracted by the value extractor
	 */
	Class<?> type() default void.class;
}