CODEWITHSUNDEEP
javaxml
Rob
Rob

Reputation: 2472

How to programmatically hide XML in java (JAXB)

I have a use case where in some cases (dependant on business logic) we want to not display some XML elements. So I can't use @XmlTransient (i think).

I'd like to do something like this.

private void HideSome() {
 // some code to hide a specific element

}

Upvotes: 1

Views: 1550

Answers (1)

JD Williams
JD Williams

Reputation: 385

You should define the element not required in annotations and the corresponding XSD as optional (minOccurs=0 maxOccurs=1).

If you do not want it rendered, set it to null before passing it to the marshaller.

xsd

<complexType name="MyElementType">
  <sequence>
    <element name="ID" type="string" />
    <element name="MaybeHere" type="string" minOccurs="0" maxOccurs="1" />
  </sequence>
</complexType>
<element name="MyElement" type="MyElementType" />

java

@XmlRootElement(name="MyElement")
public class MyElement {
  private String id;
  private String maybeHere;

  @XmlElement(name="ID")
  public String getId() {return id;}
  public void setId(String s){this.id = s;}

  @XmlElement(name="MaybeHere", required=false)
  public String getMaybeHere() {return maybeHere;}
  public void setMaybeHere(String s) { this.maybeHere = s;}
}

marshalling

/* in some code */
if(businessCondition){
  myElem.maybeHere = null;

}
marshaller.marshal(myElem);

Upvotes: 2

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