JAXB / XJC: Generate classes from elements with same complexType

问题

I would like to generate the Java classes SignResponse and AuthResponse from the following XSD using XJC:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

    <xsd:element name="SignResponse" type="tns:OrderResponseType"/>
    <xsd:element name="AuthResponse" type="tns:OrderResponseType"/>

    <xsd:complexType name="OrderResponseType">
        <xsd:sequence>
            <xsd:element name="orderRef" type="xsd:string"/>
            <xsd:element name="autoStartToken" type="xsd:string"/>
        </xsd:sequence>
   </xsd:complexType>

</xsd:schema>

This means generating classes from elements with same complexType. Using the above XSD as input, XJC will generate an OrderResponseType class, but no SignResponse and AuthResponse. It seems type="tns:OrderResponseType" is not used properly by XJC, because when OrderResponseType is defined inside SignResponse and AuthResponse, everything works OK:

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

    <xsd:element name="SignResponse">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="orderRef" type="xsd:string"/>
                <xsd:element name="autoStartToken" type="xsd:string"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>
    <xsd:element name="AuthResponse">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element name="orderRef" type="xsd:string"/>
                <xsd:element name="autoStartToken" type="xsd:string"/>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

</xsd:schema>

Using the following XJB, type="tns:OrderResponseType" is actually used, but this works only when there is only one element that has type="tns:OrderResponseType" as attribute:

<jxb:bindings version="1.0"
          xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
          xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc">

    <jxb:globalBindings>
         <xjc:simple/>
    </jxb:globalBindings>

</jxb:bindings>

Using multiple elements in combination with this <xjc:simple/> XJB binding element will cause only OrderResponseType to be generated.

Using custom bindings like:

<jxb:bindings node="//xs:complexType[@name='OrderResponseType']">
     <jxb:class name="SignResponse"/>
</jxb:bindings>

also works only for one element. XJC will throw an exception when using e.g.:

<jxb:bindings node="//xs:complexType[@name='OrderResponseType']">
     <jxb:class name="SignResponse"/>
</jxb:bindings>
<jxb:bindings node="//xs:complexType[@name='OrderResponseType']">
     <jxb:class name="AuthResponse"/>
</jxb:bindings>

Thanks in advance.

回答1:

Probably not the best solution, because SignResponse's and AuthResponse's base class will be JAXBElement<OrderResponseType>, not OrderResponseType. But you can have two different classes using the following jaxb bindings:

<jxb:bindings schemaLocation="schema.xsd" node="/xsd:schema">
    <jxb:bindings node="//xsd:element[@name='SignResponse']">
        <jxb:class name="SignResponse"/>
    </jxb:bindings>
    <jxb:bindings node="//xsd:element[@name='AuthResponse']">             
       <jxb:class name="AuthResponse"/>
    </jxb:bindings>
</jxb:bindings>

来源：https://stackoverflow.com/questions/43399861/jaxb-xjc-generate-classes-from-elements-with-same-complextype

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