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D10034 - JSR303, @AssertTrue/@AssertFalse for boolean

This chapter we will go though for boolean type, it must be true/false literal in your request, it could describe some useful request such as:

  1. Checkbox from UI
  2. Two status from UI, one for true and another for false.

Demo projects:


  1. JSR303 is only supported in Agent component in zero system, it means that after you have send the message to event bus, the JSR303 will be effectiveness.
  2. When you write the code with the Interface Style ( Will introduce in forward tutorials ), JSR303 will not support this kind of situation.
  3. For @BodyParam, it also impact Agent component only, but could support Interface Style instead of JSR303 and could provide more useful validations.

1. Source Code

package up.god.micro.validation;

import io.vertx.up.annotations.EndPoint;

import javax.validation.constraints.AssertFalse;
import javax.validation.constraints.AssertTrue;

public class AssertActor {
    public String sayBoolean(
            @QueryParam("male") final Boolean isMale,
            @QueryParam("female") final Boolean isFemale) {
        return "Hi, Lang, the parameters is 'male' = " + isMale +
                ", 'female' = " + isFemale;

2. Testing

URL : http://localhost:6083/api/jsr303/assert

Method : GET


    "data": "Hi, Lang, the parameters is 'male' = null, 'female' = null"

Because this example the query parameters ‘male’ and ‘female’ are not required, that’s why here we could see two null values output. If we provide the parameters that could not be parsed to Boolean type, you’ll get following response:

    "code": -60004,
    "message": "[ERR-60004] (ZeroSerializer) Web Exception occus: (400) - Zero system detect conversation from \"test\" to type \"class java.lang.Boolean\", but its conflict."

URL : http://localhost:6083/api/jsr303/assert?male=false

Method : GET

Response :

    "code": -60000,
    "message": "[ERR-60000] (Validator) Web Exception occus: (400) - Request validation failure, class = class up.god.micro.validation.AssertActor, method = public java.lang.String up.god.micro.validation.AssertActor.sayAssert(java.lang.Boolean,java.lang.Boolean), message = must be true.",
    "info": "must be true"

Once we provide the parameter of male to ‘false’, it means that the validation rule will be triggered, in this kind of situation we could see the correct error messages.

3. Summary

This chapter describe the usage of @AssertTrue and @AssertFalse in your code, it belong to JSR303 specification.