Package org.springframework.lang

package org.springframework.lang

Common annotations with language-level semantics: nullability as well as JDK API indications. These annotations sit at the lowest level of Spring's package dependency arrangement, even lower than org.springframework.util, with no Spring-specific concepts implied.

Used descriptively within the framework codebase. Can be validated by build-time tools (for example, FindBugs or Animal Sniffer), alternative JVM languages (for example, Kotlin), as well as IDEs (for example, IntelliJ IDEA or Eclipse with corresponding project setup).

Annotation Interfaces

Class	Description
Contract	Inspired from org.jetbrains.annotations.Contract, this variant has been introduce in the org.springframework.lang package to avoid requiring an extra dependency, while still following the same semantics.
NonNull	A common Spring annotation to declare that annotated elements cannot be null.
NonNullApi	A common Spring annotation to declare that parameters and return values are to be considered as non-nullable by default for a given package.
NonNullFields	A common Spring annotation to declare that fields are to be considered as non-nullable by default for a given package.
Nullable	A common Spring annotation to declare that annotated elements can be null under certain circumstances.