JarCastingSpring Web Validator
Utility methods for concise server-side http validation for client errors using Spring Web
Adding to your project
You will need to have the spring-web dependency in your project https://mvnrepository.com/artifact/org.springframework/spring-web. Anything below version 3.2 should not work.
Add this dependency:
<dependency>
<groupId>com.github.instantpudd</groupId>
<artifactId>spring-web-validator</artifactId>
<version>0.0.1</version>
</dependency>
Create a bean for ClientErrorExceptionHandler. This will allow it to work with Spring to map the exceptions this library throws to appropriate responses.
@Bean
public ClientErrorExceptionHandler clientErrorExceptionHandler() {
return new ClientErrorExceptionHandler();
}
Validating
@RequestMapping(method=RequestMethod.POST)
public void someEndpoint(@RequestBody SomeObject someObject) {
//Will result in a 400 status with the response body containing the message
//"someProperty cannot be null" if someProperty is null.
Validator
.returnStatus(ClientErrorStatusCode.BAD_REQUEST) //Synonym to ClientErrorStatusCode.STATUS_400. Every 4xx http status represented.
.ifNull(someObject.getSomeProperty()) //Other options: always(), ifTrue(expression), ifFalse(expression), ifNotNull()
.withErrorMessage("someProperty cannot be null") //withNoErrorMessage() also possible
.execute(); //Does the validation
//...rest of the method
}