Parse XML in Kotlin with Jackson

LedgerActivities.kt

import com.fasterxml.jackson.annotation.JsonAlias
import com.fasterxml.jackson.annotation.JsonProperty
import com.fasterxml.jackson.annotation.JsonRootName
import java.util.*

data class LedgerActivityDetail(

        @set:JsonProperty("TransactionType")
        var loanType: String? = null,

        @set:JsonProperty("Amount")
        var amount: String? = null
)


@JsonRootName("LedgerActivityObject")
data class LedgerActivity(

        @set:JsonProperty("LedgerTransactionDate")
        var LedgerTransactionDate: String? = null,

        @set:JsonProperty("Amount")
        var amount: String? = null,

        // HERE IS WHERE THE MAGIC HAPPENS!!!
        @set:JsonAlias("LedgerTransactionDetails", "LedgerActivityDetailObject")
        var LedgerActivityDetails: List<LedgerActivityDetail> = ArrayList()
)


@JsonRootName("ArrayOfLedgerActivityObject")
data class LedgerActivities(

        @set:JsonProperty("LedgerActivityObject")
        var ledgerActivities: List<LedgerActivity> = ArrayList()
)

parsingKotlinXmlViaJackson.kt

import com.fasterxml.jackson.databind.DeserializationFeature
import com.fasterxml.jackson.databind.MapperFeature
import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule
import com.fasterxml.jackson.dataformat.xml.XmlMapper
import com.fasterxml.jackson.module.kotlin.readValue
import com.fasterxml.jackson.module.kotlin.registerKotlinModule

internal val kotlinXmlMapper = XmlMapper(JacksonXmlModule().apply {
    setDefaultUseWrapper(false)
}).registerKotlinModule()
        .configure(MapperFeature.ACCEPT_CASE_INSENSITIVE_PROPERTIES, true)
        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)


internal inline fun <reified T : Any> parseAs(path: String): T {
    val resource = /*acquire a classLoader*/.getResource(path)
    return kotlinXmlMapper.readValue(resource)
}

fun main(args: Array<String>) {
    val ledgersInCode = parseAs<LedgerActivities>("path to ugly.xml")
    println(ledgersInCode.ledgerActivities[0]) // the first action!!!
}

ugly.xml

<?xml version="1.0" encoding="utf-8"?>
<ArrayOfLedgerActivityObject xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <LedgerActivityObject>
    <LedgerTransactionDate>7/6/2017</LedgerTransactionDate>
    <Amount>1056.38</Amount>
    <LedgerTransactionDetails>
      <LedgerActivityDetailObject>
        <Amount>1056.38</Amount>
        <TransactionType>Simple</TransactionType>
      </LedgerActivityDetailObject>
    </LedgerTransactionDetails>
  </LedgerActivityObject>
  <LedgerActivityObject>
    <LedgerTransactionDate>2/27/2017</LedgerTransactionDate>
    <Amount>250.46</Amount>
    <LedgerTransactionDetails>
      <LedgerActivityDetailObject>
        <TransactionType>Simple</TransactionType>
        <Amount>250.46</Amount>
      </LedgerActivityDetailObject>
    </LedgerTransactionDetails>
  </LedgerActivityObject>
  <LedgerActivityObject>
    <LedgerTransactionDate>1/31/2017</LedgerTransactionDate>
    <Amount>124.28</Amount>
    <LedgerTransactionDetails>
      <LedgerActivityDetailObject>
        <TransactionType>Simple</TransactionType>
        <Amount>124.28</Amount>
      </LedgerActivityDetailObject>
    </LedgerTransactionDetails>
  </LedgerActivityObject>
</ArrayOfLedgerActivityObject>