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javax.annotation.meta.Exhaustive Maven / Gradle / Ivy

package javax.annotation.meta;

import java.lang.annotation.Documented;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

/**
 * This annotation can be applied to the value() element of an annotation that
 * is annotated as a TypeQualifier. This is only appropriate if the value field
 * returns a value that is an Enumeration.
 * 
 * 

* Applications of the type qualifier with different values are exclusive, and * the enumeration is an exhaustive list of the possible values. * *

* For example, the following defines a type qualifier such that if you know a * value is neither {@literal @Foo(Color.Red)} or {@literal @Foo(Color.Blue)}, * then the value must be {@literal @Foo(Color.Green)}. And if you know it is * {@literal @Foo(Color.Green)}, you know it cannot be * {@literal @Foo(Color.Red)} or {@literal @Foo(Color.Blue)} * *

 * @TypeQualifier  @interface Foo {
 *     enum Color {RED, BLUE, GREEN};
 *     @Exhaustive Color value();
 * }
 * 
*/ @Documented @Retention(RetentionPolicy.RUNTIME) public @interface Exhaustive { }




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