Annotate Required Field Contract For Free

External annotations let you 'cheat' the engine, by making it see the attributes (for methods, parameters and other declarations), which were not declared at the time the library was compiled. External annotations are specified in XML files.

Contract annotations let you define expected outputs for given inputs, or put in other words, define dependencies between reference type and boolean arguments of a function and its return value. The mechanism of contract annotations allows creating APIs that could be consumed in easier and safer way.

Annotations are pieces of metadata that provide information about code elements, such as classes, methods, or parameters. In Java, there is a set of built-in annotations. Also, many libraries and frameworks, such as Spring and Lombok define their own annotations.

A set of Java annotations which can be used in JVM-based languages. They serve as an additional documentation and can be interpreted by IDEs and static analysis tools to improve code analysis.

Annotations are comment lines starting with a comment symbol and two pound signs ( /*## ). Annotations demarcate new sections in the code and therefore play an important role in tracing between design constructs and the corresponding code.

Contract annotations let you define expected outputs for given inputs, or put in other words, define dependencies between reference type and boolean arguments of a function and its return value. The mechanism of contract annotations allows creating APIs that could be consumed in easier and safer way.

Contract annotations let you define expected outputs for given inputs, or put in other words, define dependencies between reference type and boolean arguments of a function and its return value.