xjc:无法接受类自定义

Question

我正在尝试从一个由DTD生成的大约7,000行cXML模式文件生成代码。我已经能够用xjc定制解决一些冲突，但最后一个问题让我感到困惑。

我已经尝试了类和工厂方法定制，但没有成功。

当我尝试应用工厂方法定制时，我得到了这样的消息：

  [xjc] [ERROR] compiler was unable to honor this class customization. It is attached to a wrong place, or its inconsistent with other bindings.

其他人也遇到了这个问题，并能够解决它。(This link很有帮助。)

我想知道我的问题是否与元素的抽象性质有关。

这条弯路令人沮丧，任何帮助都将不胜感激。

以下是模式中的片段：

  <xs:element name="cxml.payment" abstract="true">
    <xs:complexType> <!-- Line 2477 -->
      <xs:sequence>
        <xs:element minOccurs="0" ref="PostalAddress"/>
      </xs:sequence>
      <xs:attributeGroup ref="PCard.attlist"/>
    </xs:complexType>
  </xs:element>
  <xs:complexType name="cxml.payment">
    <xs:sequence>
      <xs:element ref="cxml.payment"/>
    </xs:sequence>
  </xs:complexType>

  <xs:element name="Payment" type="cxml.payment" />

 <xs:element name="PCard" substitutionGroup="cxml.payment"/>

  <xs:attributeGroup name="PCard.attlist">
    <xs:attribute name="number" use="required" type="number"/>
    <xs:attribute name="expiration" use="required" type="date"/>
    <xs:attribute name="name" type="string"/>
  </xs:attributeGroup>

以下是原始错误：

> compile:
>      [echo] Compiling the schema...
>       [xjc] Compiling file:/..cXML.xsd
>       [xjc] [ERROR] A class/interface with the same name "cXML.CxmlPayment" is already in use. Use a class customization to
> resolve this conflict.
>       [xjc]   line 2477 of file:..cXML.xsd
>       [xjc]
>       [xjc] [ERROR] (Relevant to above error) another "CxmlPayment" is generated from here.
>       [xjc]   line 2477 of file:..cXML.xsd
>       [xjc]
>       [xjc] [ERROR] (Relevant to above error) This confusing error happened most likely because the schema uses a technique called
> "chameleon schema", which causes a single definition to be loaded
> multiple times into different namespaces. See
> http://forums.java.net/jive/thread.jspa?threadID=18631 for more about
> this.
>       [xjc]   line 2477 of file:..cXML.xsd
>       [xjc]
>       [xjc] [ERROR] Two declarations cause a collision in the ObjectFactory class.
>       [xjc]   line 2477 of file:..cXML.xsd
>       [xjc]
>       [xjc] [ERROR] (Related to above error) This is the other declaration.
>       [xjc]   line 2477 of file:..cXML.xsd
>       [xjc]
>       [xjc] failure in the XJC task. Use the Ant -verbose switch for more details

Answer 1

当然，我应该想到的。当我发布这个问题时，解决方案就出现了。

根据Java，绑定编译器尝试为每个元素和每个命名的ComplexType创建一个"default binding rules"类。导致冲突的原因是两个名称都使用cxml.payment。

在这种情况下，需要的就是这个简单的类定制：

 <jxb:bindings node="//xs:element[@name='cxml.payment']/xs:complexType">
     <jxb:class name="CxmlInnerPaymentType" />
 </jxb:bindings>

教训是要密切关注xjc错误消息中的行号。在这种情况下，他们一直将我指向2477行。