Hello,
I'm using JAXB 2.1.10 from Sun's JDK 1.6.0_18:
D:\apps\jdk160_18\bin>xjc.exe -version xjc version "JAXB 2.1.10 in JDK 6" JavaTM Architecture for XML Binding(JAXB) Reference Implementation, (build JAXB 2.1.10 in JDK 6)
I need to have JAXB's marshaller produce an empty element (e.g. <someStringField></someStringField> or <someStringField/>) when the JAXB object has the value of the empty string (""). However, rather than doing that, JAXB omits the element altogether from its output (as if it where an optional element).
My searches in the Internet indicated that JAXB should normally create this tag, as long as you set the field to the non-null empty string (i.e. myJAXBObject.setSomeStringField(""); ):
http://stackoverflow.com/questions/594537/how-to-instantiate-an-empty-element-with-jaxb https://jaxb.dev.java.net/tutorial/section_2_2_12_8-No-Value.html#No%20Value
In my XSD, I've tried to indicate (in every way I know) that the element's presence is mandatory even if it is empty:
<xs:element name="outerElement">
<xs:complexType>
<xs:sequence>
<xs:element name="someStringField" type="xs:string" nillable="false" minOccurs="1" />
<xs:element name="someOtherStringField" type="xs:string" />
The generated code looks like this (it's the same for both elements):
@XmlElement(name = "someStringField", required = true)
protected String someStringField;
@XmlElement(name = "someOtherStringField", required = true)
protected String someOtherStringField;
However, when I marshal the following object...
outerElement.setSomeStringField("");
outerElement.setSomeOtherStringField("Value was set");
I get:
<outerElement>
<someOtherStringField>Value was set</someOtherStringField>
</outerElement>
When I was expecting:
<outerElement>
<someStringField></someStringField>
<someOtherStringField>Value was set</someOtherStringField>
</outerElement>
Or:
<outerElement>
<someStringField/>
<someOtherStringField>Value was set</someOtherStringField>
</outerElement>
Can anyone spot what I'm doing wrong?