[BUG] Deserialization does not work for XmlArraySerializationType.FLAT where XML Name is customised

[madpah]

Discovered whilst working CycloneDX/cyclonedx-python-lib#576.

Steps to reproduce:

@property
    @serializable.view(SchemaVersion1Dot6)
    @serializable.xml_array(serializable.XmlArraySerializationType.FLAT, child_name='omniborId')
    @serializable.xml_sequence(16)
    def omnibor_ids(self) -> 'SortedSet[OmniborId]':
        """
        Specifies the OmniBOR Artifact ID. The OmniBOR, if specified, MUST be valid and conform to the specification
        defined at: https://www.iana.org/assignments/uri-schemes/prov/gitoid

        Returns:
            `Iterable[str]` or `None`
        """

        return self._omnibor_ids

produces XML (as expected):
<omniborId>gitoid:blob:sha1:261eeb9e9f8b2b4b0d119366dda99c6fd7d35c64</omniborId>

however this fails deserialization:
ValueError: omnibor_id is not a known Property for cyclonedx.model.component.Component

[madpah]

Upon investigation, this issue is caused by a difference in approach to handling custom field names and the CurrentFormatter.

Example below are with and the default formatter CamelCasePropertyNameFormatter.

Note: This only affects XML (de-)serialization.

The expectation is for the serialized version to use the custom name stockId.

Example 1

    @property
    @serializable.view(SchemaVersion4)
    @serializable.xml_array(XmlArraySerializationType.FLAT, 'stockId')
    @serializable.xml_sequence(21)
    def stock_ids(self) -> Set[StockId]:
        return self._stock_ids

❌ Serialization produces: <stockId>stock-id-1</stockId> as desired, but deserialization fails with:

ValueError: stock_id is not a known Property for tests.model.Book

Example 2

    @property
    @serializable.view(SchemaVersion4)
    @serializable.xml_array(XmlArraySerializationType.FLAT, 'stock_id')
    @serializable.xml_sequence(21)
    def stock_ids(self) -> Set[StockId]:
        return self._stock_ids

❌ Serialization produces: <stock_id>stock-id-1</stock_id>, but this DOES deserialize successfully.

Example 3
Attempting to force custom XML name

    @property
    @serializable.view(SchemaVersion4)
    @serializable.xml_array(XmlArraySerializationType.FLAT, 'stock_id')
    @serializable.xml_name('stockId')
    @serializable.xml_sequence(21)
    def stock_ids(self) -> Set[StockId]:
        return self._stock_ids

❌ Custom name is not used during serialization - output is <stock_id>..., but this DOES deserialize successfully (as per Example 2)

[madpah]

Expectation is that Example 1 should work here, with Examples 2 and 3 being curious attempts only.

[jkowalleck]

stumbled upon this (or a similar) issue, when working with the lib downstream.
my solution was, to do write the (de)serializers manually by implementing BaseHelper.{xml,json}_{de,}serialize() functions