JaxbAnnotationIntrospector creates an element from @XmlAttribute instead of an attribute

[rynam0]

Expected: <Individual identifier="1"><givenName>Jay</givenName><surName>Unit</surName></Individual>
Actual: <Individual xmlns=""><identifier>1</identifier><givenName>Jay</givenName><surName>Unit</surName></Individual>

package com.example.tests;

import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import com.fasterxml.jackson.module.jaxb.JaxbAnnotationIntrospector;
import org.junit.Test;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

import static junit.framework.Assert.assertEquals;

public class PersonTest {

@XmlRootElement(name = "Individual")
class MyPerson {

    @XmlAttribute(name = "identifier")
    private Long id;

    @XmlElement(name = "givenName")
    private String firstName;

    @XmlElement(name = "surName")
    private String lastName;

    public Long getId() {
        return id;
    }
    public void setId(final Long id) {
        this.id = id;
    }

    public String getFirstName() {
        return firstName;
    }
    public void setFirstName(final String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }
    public void setLastName(final String lastName) {
        this.lastName = lastName;
    }
}


@Test
public void testPersonAsXml() throws Exception {
    MyPerson person = new MyPerson();
    person.setId(1L);
    person.setFirstName("Jay");
    person.setLastName("Unit");

    XmlMapper mapper = new XmlMapper();
    mapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());
    String actual = mapper.writeValueAsString(person);
    System.out.println("Person: " + actual);

    String expected = "<Individual identifier=\"1\"><givenName>Jay</givenName><surName>Unit</surName></Individual>";
    assertEquals(expected, actual);
}

}

[cowtowncoder]

I can not reproduce this with version 2.0.2 (added unit test). One difference is that I do not see that extra namespace declaration; could be because tests use Woodstox Stax implementation (not the JDK 1.6 default Sjsxp).

[rynam0]

I am running this as a maven project and it would appear stax-api is coming down w/ the jackson dependency. Might you try running this in maven to see if you can reproduce it there?

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <groupId>jackson-jaxb-poc</groupId>
  <artifactId>jackson-jaxb-poc</artifactId>
  <version>1.0-SNAPSHOT</version>

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.8.2</version>
      <scope>test</scope>
    </dependency>

    <dependency>
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-xml</artifactId>
      <version>2.0.2</version>
      <scope>compile</scope>
    </dependency>

  </dependencies>

</project>

[cowtowncoder]

I will try it.

[geoffrr]

Is this issue still active?

I am experiencing similar behaviour, on a very small maven module based on Java 6, using Jackson version 2.0.5 libraries.

Serialized through JAXB:

    <jurisdiction name="Aversan" messageStandard="CeRx"/>

Serialized through Jackson:

  <jurisdiction>
    <name>Aversan</name>
    <messageStandard>CeRx</messageStandard>
  </jurisdiction>

Object:

@XmlAccessorType(value = XmlAccessType.FIELD)
public class Jurisdiction {

    @XmlAttribute(name="name",required=true)
    private String name;
    @XmlAttribute(name="messageStandard", required=true)
    private String messageStandard;
...

Jackson mapping code:

    @Test
    public void serializeXML() throws Exception {

        ObjectMapper mapper = new XmlMapper();
        mapper.setAnnotationIntrospector(new JaxbAnnotationIntrospector());
        mapper.enable(SerializationFeature.INDENT_OUTPUT);
        logger.info(mapper.writeValueAsString(constructSampleScenario()));

    }

Maven dependencies:

    <dependencies>
        <dependency>
            <groupId>com.fasterxml.jackson.module</groupId>
            <artifactId>jackson-module-jaxb-annotations</artifactId>
            <version>2.0.5</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-xml</artifactId>
            <version>2.0.5</version>
            <scope>test</scope>
        </dependency>

        <dependency>
          <groupId>org.codehaus.woodstox</groupId>
          <artifactId>woodstox-core-asl</artifactId>
          <version>4.1.4</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

Thanks for the awesome library!

[cowtowncoder]

Thank you for code sample: I will try to reproduce this with 2.1.0-SNAPSHOT.

[cowtowncoder]

Ok, @geoffrr, I can not reproduce this issue with 2.1.0-SNAPSHOT; for me attribute annotation works with both Jackson and JAXB annotations. I can try to see if I can reproduce it with 2.0.5...

[cowtowncoder]

Can not reproduce with 2.0.5 either.

[cowtowncoder]

Can not reproduce, closing. Please file a new issue with unit test (and version), if still problematic with 2.1.1 or above.

[cowtowncoder]

Ok: as per #6 I finally understand the issue, and this was reproducible.

The issue is now solved for 2.4 (not yet released); but with earlier version, the work-around is to use XmlJaxbAnnotationIntrospector and NOT vanilla JaxbAnnotationIntrospector.