Jaxb, Class has two properties of the same name

Question

with jaxb, i try to read an xml file only a few element in xml file are interesting, so i would like to skip many element

xml content

xml i try to read

<?xml version="1.0" encoding="UTF-8"?>
<!--Sample XML file generated by XMLSpy v2010 rel. 3 sp1 (http://www.altova.com)-->
<flx:ModeleREP xsi:schemaLocation="urn:test:mod_rep.xsd mod_rep.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:flx="urn:test:mod_rep.xsd">
<flx:DocumentHeader>
    <flx:Identification v="04489"/>
</flx:DocumentHeader>
<flx:TimeSeries>
    <flx:Identification v="test1a"/>
    <flx:BusinessType v="A01"/>
    <flx:Product v="123a"/>
    <flx:ResourceObject codingScheme="N" v="testa"/>
    <flx:Period>
        <flx:TimeInterval v="2011-07-02T00:00/2011-07-16T00:00"/>
        <flx:Resolution v="PT2H"/>
        <flx:Pt>
            <flx:P v="1"/>
            <flx:Q unitCode="String" v="1.0"/>
            <flx:A currencyIdentifier="String" v="195.0"/>
        </flx:Pt>
    </flx:Period>
</flx:TimeSeries>
<flx:TimeSeries>
    <flx:Identification v="test2a"/>
    <flx:BusinessType v="A01"/>
    <flx:Product v="a123b"/>
    <flx:ResourceObject codingScheme="N" v="test2"/>
    <flx:Period>
        <flx:TimeInterval v="2011-07-02T00:00/2011-07-16T00:00"/>
        <flx:Resolution v="PT2H"/>
        <flx:Pt>
            <flx:P v="1"/>
            <flx:Q unitCode="String" v="1.0"/>
            <flx:A currencyIdentifier="String" v="195.0"/>
        </flx:Pt>
        <flx:Pt>
            <flx:P v="2"/>
            <flx:Q unitCode="String" v="1.0"/>
            <flx:A currencyIdentifier="String" v="195.0"/>
        </flx:Pt>
    </flx:Period>
</flx:TimeSeries>
</flx:ModeleREP>

my class

@XmlRootElement(name="ModeleREP", namespace="urn:test:mod_rep.xsd")
public class ModeleREP {

  @XmlElement(name="TimeSeries")
  protected List<TimeSeries> timeSeries;

  public List<TimeSeries> getTimeSeries() {
  if (this.timeSeries == null) {
      this.timeSeries = new ArrayList<TimeSeries>();
  }
  return this.timeSeries;
  }

  public void setTimeSeries(List<TimeSeries> timeSeries) {
  this.timeSeries = timeSeries;
  }

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "TimeSeries")
public class TimeSeries {

@XmlElement(name="ResourceObject")
protected RessourceObject resourceObject;

@XmlElement(name = "Period")
protected Period period;

public RessourceObject getResourceObject() {
    return this.resourceObject;
}

public void setResourceObject(RessourceObject resourceObject) {
    this.resourceObject = resourceObject;
}

public Period getPeriod() {
    return this.period;
}

public void setPeriod(Period period) {
    this.period = period;
}

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "ResourceObject")

public class RessourceObject {
@XmlAttribute(name = "codingScheme")
protected String codingScheme;

@XmlAttribute(name = "v")
protected String v;

public String getCodingScheme() {
    return this.codingScheme;
}

public void setCodingScheme(String codingScheme) {
    this.codingScheme = codingScheme;
}

public String getV() {
    return this.v;
}

public void setV(String v) {
    this.v = v;
}
}

@XmlAccessorType(XmlAccessType.NONE)
@XmlRootElement(name = "Period")
public class Period {

@XmlElement(name = "TimeInterval")
protected TimeInterval timeInterval;

@XmlElement(name = "Pt")
protected List<Pt> pt;

public TimeInterval getTimeInterval() {
    return this.timeInterval;
}

public void setTimeInterval(TimeInterval timeInterval) {
    this.timeInterval = timeInterval;
}

public List<Pt> getPt() {
    if (this.pt == null) {
    this.pt = new ArrayList<Pt>();
    }
    return this.pt;
}

public void setPt(List<Pt> pt) {
    this.pt=pt;
}

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "TimeInterval")
public class TimeInterval {

@XmlAttribute(name = "v")
private String timeIntervalPeriod;

public String getTimeIntervalPeriod() {
    return this.timeIntervalPeriod;
}

public void setTimeIntervalPeriod(String timeIntervalPeriod) {
    this.timeIntervalPeriod = timeIntervalPeriod;
}

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "Pt")
public class Pt {

@XmlElement(name = "P")
protected P p;

@XmlElement(name = "A")
protected A a;

public P getP() {
    return this.p;
}

public void setP(P p) {
    this.p = p;
}

public A getA() {
    return this.a;
}

public void setA(A a) {
    this.a = a;
}
}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "P")
public class P {
@XmlAttribute(name = "v")
protected String position;


public String getPosition(){
    return this.position;
}

public void setPosition(String position){
    this.position=position;
}
}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlRootElement(name = "A")
public class A {
@XmlAttribute(name = "v")
protected String calculatedAmount;

public String getCalculatedAmount() {
    return this.calculatedAmount;
}

public void setCalculatedAmount(String calculatedAmount) {
    this.calculatedAmount = calculatedAmount;
}
}

when i try to read the xlm file i get i get

com.sun.xml.internal.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
Class has two properties of the same name "timeSeries"
    this problem is related to the following location:
        at public java.util.List testjaxp.ModeleREP.getTimeSeries()
        at testjaxp.ModeleREP
    this problem is related to the following location:
        at protected java.util.List testjaxp.ModeleREP.timeSeries
        at testjaxp.ModeleREP

i don't understand this error

edit: i use jaxb-impl-2.1.12

ok now i don't have any error, but when i check my object, timeSeries is null...

so maybe jaxb seem to have problem with flx?

Answer 1

There are multiple solutions but basicly if you annotate on variable declaration then you need @XmlAccessorType(XmlAccessType.FIELD), but if you prefer to annotate either a get- or set-method then you don't.

So you can do:

@XmlRootElement(name="MY_CLASS_A")
@XmlAccessorType(XmlAccessType.FIELD)
public class MyClassA
{
    @XmlElement(name = "STATUS")   
    private int status;
   //.. and so on
}

Or:

@XmlRootElement(name="MY_CLASS_A")
public class MyClassA
{
    private int status;

    @XmlElement(name = "STATUS")         
    public int getStatus()
    {
    }
}

Answer 2

just added this to my class

@XmlAccessorType(XmlAccessType.FIELD)

worked like a cham

Answer 3

These are the two properties JAXB is looking at.

public java.util.List testjaxp.ModeleREP.getTimeSeries()  

and

protected java.util.List testjaxp.ModeleREP.timeSeries

This can be avoided by using JAXB annotation at get method just like mentioned below.

@XmlElement(name="TimeSeries"))  
public java.util.List testjaxp.ModeleREP.getTimeSeries()

Answer 4

"Class has two properties of the same name exception" can happen when you have a class member x with a public access level and a getter/setter for the same member.

As a java rule of thumb, it is not recommended to use a public access level together with getters and setters.

Check this for more details: Public property VS Private property with getter?

To fix that:

1. Change your member's access level to private and keep your getter/setter
2. Remove the member's getter and setter

Answer 5

It will work when you put your annotation before the getters, and remove it from the protected attributes:

protected String codingScheme;

@XmlAttribute(name = "codingScheme")
public String getCodingScheme() {
    return this.codingScheme;
}

Answer 6

A quick and simple way to fix this issue is to remove the @XmlElement(name="TimeSeries") from the top of the variable declaration statement protected List<TimeSeries> timeSeries; to the top of its getter, public List<TimeSeries> getTimeSeries().

Thus your ModeleREP class will look like:

@XmlRootElement(name="ModeleREP", namespace="urn:test:mod_rep.xsd")
public class ModeleREP {


  protected List<TimeSeries> timeSeries;

  @XmlElement(name="TimeSeries")
  public List<TimeSeries> getTimeSeries() {
    if (this.timeSeries == null) {
      this.timeSeries = new ArrayList<TimeSeries>();
    }
    return this.timeSeries;
  }

  public void setTimeSeries(List<TimeSeries> timeSeries) {
    this.timeSeries = timeSeries;
  }
}

Hope it helps!