Unmarshalling exception

We are getting scema validation error  ( Unmarshalling exception )for type CustomInteger when value its empty or null.

XSD:

<xsd:element name="CustomInteger" minOccurs="0" maxOccurs="unbounded" nillable="true">
<xsd:complexType>
<xsd:annotation>
<xsd:documentation>"URN" is the name of a flex field that can be imported or exported.</xsd:documentation>
</xsd:annotation>
<xsd:simpleContent>
<xsd:extension base="xsd:integer">
<xsd:attribute name="name" type="xsd:string"/>
</xsd:extension>
</xsd:simpleContent>
</xsd:complexType>
</xsd:element>

 

Generated binding class (JAXB):

public static class CustomInteger

{ @XmlValue protected BigInteger value; @XmlAttribute(name = "name") protected String name; /** * Gets the value of the value property. * * @return * possible object is * \{@link BigInteger }

• */
  public BigInteger getValue()

  { return value; }

/**

• Sets the value of the value property.
• @param value
• allowed object is
• {@link BigInteger }

• */
  public void setValue(BigInteger value)

  { this.value = value; }

/**

• Gets the value of the name property.
• @return
• possible object is
• {@link String }

• */
  public String getName()

  { return name; }

  }