override fun beginStruct()

in runtime/serde/serde-xml/common/src/aws/smithy/kotlin/runtime/serde/xml/XmlSerializer.kt [25:55]

• 14 lines of code
• 5 McCabe index (conditional complexity)

    override fun beginStruct(descriptor: SdkFieldDescriptor): StructSerializer {
        // if we are serializing a nested structure field
        // either through `field(.., SdkSerializable)` or as part of a list member/map entry
        // use the parent descriptor instead of the object descriptor passed to us.
        // The object descriptor is for root nodes, nested structures have their own field descriptor
        // that describes the referred to struct
        val structDescriptor = parentDescriptorStack.topOrNull() ?: descriptor

        // Serialize top-level (root node) ns declarations and non-default declarations.
        val isRoot = nodeStack.isEmpty()
        val ns = structDescriptor.findTrait<XmlNamespace>()
        if (ns != null && (isRoot || ns.prefix != null)) {
            xmlWriter.namespacePrefix(ns.uri, ns.prefix)
        }

        val tagName = structDescriptor.serialName.name

        // if the parent descriptor is from a list or map we omit the root level node
        // e.g. Map<String, GreetingStruct> goes to:
        // `<value><hi>foo</hi></value>`
        // instead of
        // `<value><GreetingStruct><hi>foo</hi></GreetingStruct></value>`
        //
        if (!structDescriptor.isMapOrList) {
            xmlWriter.startTag(tagName)
        }

        nodeStack.push(tagName)

        return this
    }