Kotlin / JacksonXML - 反序列化 XML 偶尔属性（来自 Qt TS 文件）

Question

我有以下 XML 结构（基于 Qt TS 文件格式）来反序列化：

<context>
    <name>General</name>
    <message>
        <source>One</source>
        <translation>One</translation>
    </message>
    <message>
        <source>Two</source>
        <translation>Two</translation>
    </message>
    <message numerus="yes">
        <source>Thing</source>
        <translation>
            <numerusform>Thing</numerusform>
            <numerusform>Things</numerusform>
        </translation>
    </message>
</context>

用于解析的 Kotlin 代码：

data class Context(@JacksonXmlProperty(localName = "name")
                   val name: String = "",
                   private val mMap: MutableList<Message> = mutableListOf()) {
    @JacksonXmlElementWrapper(useWrapping = false)
    @JacksonXmlProperty(localName = "message")
    var messages = mMap
        set(value) {
            field.addAll(value); return
        }
}

data class Message(@JacksonXmlProperty(localName = "numerus", isAttribute = true)
                   val numerus: String? = null,
                   @JacksonXmlProperty(localName = "source")
                   val source: String? = null,
                   @JacksonXmlProperty(localName = "comment")
                   val comment: String? = null,
                   @JacksonXmlProperty(localName = "translation")
                   val translation: Translation? = null)

data class Translation(@JacksonXmlProperty(localName = "type", isAttribute = true)
                       val type: String? = null,
                       @JacksonXmlProperty(localName = "innerText")
                       @JacksonXmlText
                       val text: String? = null,
                       private val numerusMap: MutableList<NumerusForm> = mutableListOf()) {
    // custom setter because otherwise the list isn't assembled correctly
    @JacksonXmlElementWrapper(useWrapping = false)
    @JacksonXmlProperty(localName = "numerusform")
    var numerusForm = numerusMap
        set(value) {
            field.addAll(value); return
        }
}

data class NumerusForm(@JacksonXmlProperty(localName = "innerText")
                       @JacksonXmlText
                       val text: String? = null
)

如果只有

，此代码有效

<translation 
   <numerusform>Thing</numerusform>
</translation>

XML 中可用的属性。只要我有 <translation>One</translation>，它就会崩溃。

关于如何解析这个 XML 结构中偶尔出现的属性而不会在文件的其余部分崩溃的想法？

Answer 1

通过从 Jackson 创建我自己的解串器 class 找到了解决方案。

import com.fasterxml.jackson.core.JsonParser
import com.fasterxml.jackson.databind.DeserializationContext
import com.fasterxml.jackson.databind.JsonNode
import com.fasterxml.jackson.databind.deser.std.StdDeserializer

class MyOwnDeserizalizer : StdDeserializer<TSTransformerService.Translation>(Translation::class.java) {
    override fun deserialize(jP: JsonParser, ctxt: DeserializationContext): Translation {

    //Gets the Translation element
    val rootNode: JsonNode = jP.getCodec().readTree<JsonNode>(jP)

    // Get and set the value from the rootnode

    return Translation(type, text, numerus)
 }
}

一些有帮助的来源：

jackson custom deserializer only getting last value in list xml
Jackson Kotlin - Deserialize JsonNode

Kotlin / JacksonXML - 反序列化 XML 偶尔属性（来自 Qt TS 文件）

Kotlin / JacksonXML - Deserialize XML occasional property (from Qt TS files)

xml

kotlin

jackson-dataformat-xml

Kotlin / JacksonXML - 反序列化 XML 偶尔 属性 （来自 Qt TS 文件）

Kotlin / JacksonXML - Deserialize XML occasional property (from Qt TS files)

xml

kotlin

jackson-dataformat-xml

Kotlin / JacksonXML - 反序列化 XML 偶尔属性（来自 Qt TS 文件）