buffer-codec/com.ditchoom.buffer.codec.annotations/LengthFrom

LengthFrom

@Target(allowedTargets = [AnnotationTarget.VALUE_PARAMETER])

annotation class LengthFrom(val field: String)

Marks a String field whose byte length is determined by a preceding numeric field. The referenced field must exist, come before this field, and be a numeric type.

@ProtocolMessage
data class NamedRecord(
    val nameLength: UShort,
    @LengthFrom("nameLength") val name: String,  // reads nameLength bytes as UTF-8
    val value: Int,
)

Parameters

field

The name of the preceding numeric field that holds the byte length.

Properties

field

val field: String