com.fasterxml.jackson.databind.exc.MismatchedInputException: no String-argument constructor/factory method to deserialize from String value

Hi @cowtowncoder ,

My jackson version 2.9.3:

<jackson.version>2.9.3</jackson.version>
<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>${jackson.version}</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-annotations</artifactId>
      <version>${jackson.version}</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.datatype</groupId>
      <artifactId>jackson-datatype-jsr310</artifactId>
      <version>${jackson.version}</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.datatype</groupId>
      <artifactId>jackson-datatype-jdk8</artifactId>
      <version>${jackson.version}</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.module</groupId>
      <artifactId>jackson-module-kotlin</artifactId>
      <version>${jackson.version}</version>
</dependency>
<dependency>
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-xml</artifactId>
      <version>${jackson.version}</version>
</dependency>

Kotlin version : <kotlin.version>1.2.10</kotlin.version> Ratpack version : <ratpack.kotlin.version>1.1.2</ratpack.kotlin.version>

I too am facing an issue while deserialising an element with an attribute.

Example XML that needs to be parsed :

<Something>
    <first cn="abc">someValue</first>
    <second>3050</second>
</Something>          

classes that I am using :

data class Something(
   @JacksonXmlProperty(localName = "first", namespace = somenamespace)  val first: String
   @JacksonXmlProperty(localName = "second", namespace = somenamespace)  val second: String
)

class ResponseXmlParser {
 private val xmlMapper = xmlObjectMapper()

  private val log = LoggerFactory.getLogger(javaClass)
  fun parseResponseXml(responseBodyStream: InputStream): Response {
    val jsonNode = xmlMapper.readValue(responseBodyStream, Envelope::class.java)
    log.info("RESPONSE: " + jsonNode.body.response)
    return jsonNode.body.response
  }

  private fun xmlObjectMapper(): XmlMapper {
    val jacksonXmlModule = JacksonXmlModule()
    jacksonXmlModule.setDefaultUseWrapper(false)

    return XmlMapper(jacksonXmlModule)
        .registerModule(KotlinModule())
        .registerModule(JavaTimeModule())
        .configure(DeserializationFeature.FAIL_ON_MISSING_CREATOR_PROPERTIES, false)
        .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
        .configure(DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY, true) as XmlMapper
  }
}

Now in the first element that has both attribute value and textual content. whilst parsing I get this exception:

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot construct instance of com.order.soap.Something (although at least one Creator exists): no String-argument constructor/factory method to deserialize from String value (‘3050’)

which is really weird. Coz I have other elements with just attribute value and all of them work just fine. Only this element which has both attribute value and textual content doesn’t work.

I have also posted my comment here : which is related I guess https://github.com/FasterXML/jackson-dataformat-xml/issues/206

[romanchekashov]

I use latest version of lib:

<dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
            <version>2.9.6</version>
        </dependency>

I’ve spent a lot of hours trying to fix this but it doesn’t work for:

<Main>	
	<Something>
		<first cn="abc">someValue</first>
		<second>3050</second>
	</Something>          
	<Something>
		<first>someValue</first>
		<second>3050</second>
	</Something>          
</Main>

If you add:

class First {
    @JacksonXmlProperty(localName = "cn", isAttribute = true)
    private String cn;

    @JacksonXmlText
    private String value;

    @Override
    public String toString() {
        return "[cn: "+cn+" value: "+value+"]";
    }
}

it will throw exception for second element! Both cases with and without attribute just doesn’t work(

[AnshikaKoul]

hmm, oka.