Update #0 - First Release

sources/main/java/javax/annotation/Nonnull.java

@@ -0,0 +1,33 @@
+package javax.annotation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+import javax.annotation.meta.TypeQualifier;
+import javax.annotation.meta.TypeQualifierValidator;
+import javax.annotation.meta.When;
+
+/**
+ * The annotated element must not be null.
+ * <p>
+ * Annotated fields must not be null after construction has completed.
+ * <p>
+ * When this annotation is applied to a method it applies to the method return
+ * value.
+ */
+@Documented
+@TypeQualifier
+@Retention(RetentionPolicy.RUNTIME)
+public @interface Nonnull {
+	When when() default When.ALWAYS;
+
+	class Checker implements TypeQualifierValidator<Nonnull> {
+
+		public When forConstantValue(Nonnull qualifierArgument, Object value) {
+			if (value == null)
+				return When.NEVER;
+			return When.ALWAYS;
+		}
+	}
+}