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Editorial Team
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Asked: 2026-05-23T17:17:09+00:00

JaxB when binding an improper date format to XMLGregorianCalendar is not throwing exception. Instead

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JaxB when binding an improper date format to XMLGregorianCalendar is not throwing exception. Instead it assigns null. What could be the problem?

@XmlAttribute(name = "travelEndDate", required = true)
@XmlSchemaType(name = "date")
protected XMLGregorianCalendar travelEndDate;

<xs:complexType name="SearchCriteria">
<xs:attribute name="travelStartDate" type="xs:date" use="required"/>
<xs:attribute name="travelEndDate" type="xs:date" use="required"/>
</xs:complexType>
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1 Answer

  1. Editorial Team

    Note: I’m the EclipseLink JAXB (MOXy) lead, and a member of the JAXB 2.X (JSR-222) expert group.

    This behaviour will vary a little between JAXB implementations. MOXy for example will throw the following exception if the value is incorrect:

    Exception in thread "main" javax.xml.bind.UnmarshalException
 - with linked exception:
[Exception [EclipseLink-3003] (Eclipse Persistence Services - 2.4.0.qualifier): org.eclipse.persistence.exceptions.ConversionException
Exception Description: Incorrect date format: [2011-02-50] (expected [YYYY-MM-DD])]
    at org.eclipse.persistence.jaxb.JAXBUnmarshaller.unmarshal(JAXBUnmarshaller.java:225)
    at forum254.Demo.main(Demo.java:18)
Caused by: Exception [EclipseLink-3003] (Eclipse Persistence Services - 2.4.0.qualifier): org.eclipse.persistence.exceptions.ConversionException
Exception Description: Incorrect date format: [2011-02-50] (expected [YYYY-MM-DD])
    at org.eclipse.persistence.exceptions.ConversionException.incorrectDateFormat(ConversionException.java:103)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertStringToXMLGregorianCalendar(XMLConversionManager.java:689)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertObjectToXMLGregorianCalendar(XMLConversionManager.java:278)
    at org.eclipse.persistence.internal.oxm.XMLConversionManager.convertObject(XMLConversionManager.java:249)
    at org.eclipse.persistence.oxm.XMLField.convertValueBasedOnSchemaType(XMLField.java:712)

    Workaround

    To get an error reported on any JAXB implementation you can set an XML schema on the unmarshaller to perform validation:

    Or you can implement an XmlAdapter to control the conversion (and throw an exception if necessary) yourself:

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