Yavi Kotlin Extensions

Yavi.kt

data class UserPostBody(val age: Int?,
                        val name: String?)

@JvmName("intConstraint")
fun <T> ValidatorBuilder<T>.constraint(prop: KProperty1<T, Int?>, block: IntegerConstraint<T>.() -> Unit): ValidatorBuilder<T> {
    return this.constraint(prop, prop.name) { it.apply(block) }
}

@JvmName("charSequenceConstraint")
fun <T, E : CharSequence?> ValidatorBuilder<T>.constraint(prop: KProperty1<T, E>, block: CharSequenceConstraint<T, E>.() -> Unit): ValidatorBuilder<T> {
    return this.constraint(prop, prop.name) { it.apply(block) }
}

fun main() {
    // before
    /*
    val validator = Validator.builder<UserPostBody>()
            .constraint(UserPostBody::age, "age") { it.notNull() }
            .constraint(UserPostBody::name, "name") { it.notBlank().lessThanOrEqual(20) }
            .build()
    */

    // after
    val validator = Validator.builder<UserPostBody>()
            .constraint(UserPostBody::age) { notNull() }
            .constraint(UserPostBody::name) { notBlank().lessThanOrEqual(20) }
            .build()
}