Cannot deserialize XML object to data class using JacksonXml

Question

I'm attempting to deserialize this xml string:

val xml2 = """
  <id>3</id>
""".trimIndent()

to this data class

@JacksonXmlRootElement(localName = "id")
data class Id(
//    @field:JacksonXmlProperty(isAttribute = true)
//    @JsonInclude(JsonInclude.Include.NON_NULL)
//    val attribute: String? = null,
    @JacksonXmlText
    val value: Int
)

but every time I attempt to do so by doing this

println(JacksonXml.asA<Id>(xml2))

I get this exception:

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Invalid definition for property ''

Why can I not make use of the @JacksonXmlText annotation? My intention is to figure out how to deserialize xml strings that look like this:

<id attribute="Pig">3</id>

but I can't even get the @JacksonXmlText annotation to work on its own, so is there a workaround that would allow me to accomplish the same thing without making use of @JacksonXmlText?

Answer 1

Can u try this sample? it works for me.

@JacksonXmlRootElement(localName = "id")
data class Id(
    //Your fields
) {
  @JacksonXmlText
  val value: Int? = 0
}