override fun renderSerializeHttpBody()

in codegen/smithy-aws-kotlin-codegen/src/main/kotlin/aws/sdk/kotlin/codegen/protocols/RestJson1.kt [35:61]

• 21 lines of code
• 4 McCabe index (conditional complexity)

    override fun renderSerializeHttpBody(
        ctx: ProtocolGenerator.GenerationContext,
        op: OperationShape,
        writer: KotlinWriter
    ) {
        super.renderSerializeHttpBody(ctx, op, writer)

        val resolver = getProtocolHttpBindingResolver(ctx.model, ctx.service)
        if (!resolver.hasHttpBody(op)) return

        // restjson1 has some different semantics and expectations around empty structures bound via @httpPayload trait
        //   * empty structures get serialized to `{}`
        // see: https://github.com/awslabs/smithy/pull/924
        val requestBindings = resolver.requestBindings(op)
        val httpPayload = requestBindings.firstOrNull { it.location == HttpBinding.Location.PAYLOAD }
        if (httpPayload != null) {
            // explicit payload member as the sole payload
            val memberName = httpPayload.member.defaultName()
            val target = ctx.model.expectShape(httpPayload.member.target)
            if (target is StructureShape) {
                writer.withBlock("if (input.#L == null) {", "}", memberName) {
                    addImport(RuntimeTypes.Http.ByteArrayContent)
                    write("builder.body = #T(#S.encodeToByteArray())", RuntimeTypes.Http.ByteArrayContent, "{}")
                }
            }
        }
    }