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package org.checkerframework.checker.nullness.qual;
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;
/**
* {@link NonNull} is a type annotation that indicates that an expression is
* never {@code null}.
*
* <p>
* For fields of a class, the {@link NonNull} annotation indicates that this
* field is never {@code null}
* <em>after the class has been fully initialized</em>. Class initialization is
* controlled by the Freedom Before Commitment type system, see
* {@link InitializationChecker} for more details.
*
* <p>
* For static fields, the {@link NonNull} annotation indicates that this field
* is never {@code null} <em>after the containing class is initialized</em>.
*
* <p>
* This annotation is rarely written in source code, because it is the default.
*
* <p>
* This annotation is associated with the {@link AbstractNullnessChecker}.
*
* @see Nullable
* @see MonotonicNonNull
* @see AbstractNullnessChecker
* @checker_framework.manual #nullness-checker Nullness Checker
*/
@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE_USE, ElementType.TYPE_PARAMETER })
public @interface NonNull {
}
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