Question

I want to create a spring bean as below.

  <bean id="qNameString" class="javax.xml.xpath.XPathConstants.STRING"/>

Here I want the reference to return type which is a QName but I understand the way I referred is wrong. Can someone please help on this.

Answer 1

Spring can create a QName for you like this:

<bean id="qName" class="java.xml.namespace.QName">
   <constructor index="0" value="localpart"/>
   <constructor index="1" value="namespaceURI"/>
</bean>

Replace localpart and namespaceURI with the local name and namespace.

To reference a constant in a class, like javax.xml.xpath.XPathConstants.STRING

<bean id="qNameString" class="org.springframework.beans.factory.config.FieldRetrievingFactoryBean">
    <property name="targetField" value="javax.xml.xpath.XPathConstants.STRING"/>
</bean>

A shorter version is available with the util schema:

<util:constant static-field="java.xml.xpath.XPathConstants.STRING"/>

Apart from being shorter, the id of the bean will be java.xml.xpath.XPathConstants.STRING rather than qNameString.

See FieldRetrievingFactoryBean and The util schema