Smoke

A declarative validator framework for dtos, beans, or just objects.

Install

Get the latest version at Jcenter

// For gradle
repositories {
    jcenter()
}

dependencies {
    compile 'com.ez.tools:smoke:5.0.0'
}

Basic Usage

class UserDto {
    @VString(shouldBe = {"John1", "John2"})
    @VNotNull
    String name = null;
}

// Will throw java.lang.IllegalStateException when field name is null
com.ez.tools.validator.Smoke.validate(new UserDto())

Go to package com.ez.tools.validator.annotations to find other features.

Advance features

Smoke 5.0 focused on the following topics:

• Field validation, with built-in constraints: @VString, @VInt, @VNotNull.
• Getter method validation, contraints can be put on method with no arguments, when validating, the getter method will be called, and the value returned will be validated.
• @VRule on class level, validate this kind of object using additional rule.

VString

The regex feature has been released! Use regex:

class UserDto {

    @VString(shouldMatch = {Regexps.EMAIL})
    String email;

    // Custom regex: Name should match all values in should match
    // And name should not match any values in should not match
    @VString(shouldMatch = {".+", "..."})
    @VString(shouldNotMatch = {"..."})
    String name;

    @VString(...)
    public void get***() {
    }
}

VRule

Use additional rules to validate your dto.

Add additional rule:

com.ez.tools.validator.Smoke.validate(new UserDto(), IRule...rules)

or:

/**
* Add your rule class
**/
@VRule(com.ez.tools.validator.core.rules.AllFieldsShouldNotBeNull.class)
class UserDto {}

// Will validate using the rule specified in VRule value.
com.ez.tools.validator.Smoke.validate(new UserDto())

Also you can write Additional rules:

class YourRule implements IRule {
    @Override
    public void validate(Object o) {
        if (!o instanceof UserDto) {
            throw new IllegalArgumentException();
        }
        UserDto dto = (UserDto) o;
        if(dto.name == "elton" && dto.age > 100) {
            throw new Exception("Elton is dead after at 99 years old.")
        }
    }
}

// Use it in your common interface:
@VRule(YourRule.class)
interface SatisfyYourRule {}

// Implements the interface:
class YourDto implements SatisfyYourRule {}

// When validate your dto, the rule will be invoked. And as rule above, Exception("Elton is dead after at 99 years old.") will be thrown
Smoke.validate(new UserDto("elton", 100))

VRecursive

Wanna validate details of a field with smoke? Try VRecursive:

class UserDto {
    @VRecursive
    AddressDto address = new AddressDto(this);
}

@VRule(AllFieldsShouldNotBeNull.class)
class AddressDto {
    public AddressDto(UserDto dto) {
        user = dto;
    }

    String a = null;

     @VString(shouldMatch = {Regexps.EMAIL})
    String getEmail() {
        return "[email protected]";
    }

    @VRecursive
    UserDto user = null;
}

// Will validate userDto's address, with respect to rules and other annotation con
// And don't worry that it might cause stackoverflow exception:
// smoke will not validate same object twice.
com.ez.tools.validator.Smoke.validate(new UserDto())

Remeber! When field is null, smoke will ignore this field's validation.

You can use VNotNull to handle this situation

class UserDto {
    @VString(shouldMatch = "^elton.+")
    String name = null;
}

// Will not validate when name is null. If you want to, add @VNotNull annotation constraints.
com.ez.tools.validator.Smoke.validate(new UserDto())