符号已定义。使用JAXB属性来解决冲突 [英] Symbol is already defined. Use JAXB property to resolve the conflict

问题描述

我有一个xsd文件（yahoo.xsd），我在其中导入另一个xsd文件，如下所示：

I have a xsd file (yahoo.xsd) where I import another xsd file like this:

  <xs:import schemaLocation="stock.xsd"/>
  <xs:attribute name="lang" type="xs:NCName"/>

stock.xsd如下所示：

The stock.xsd looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns:yahoo="http://www.yahooapis.com/v1/base.rng">
<xs:import namespace="http://www.yahooapis.com/v1/base.rng" schemaLocation="yahoo.xsd"/>
<xs:element name="quote">
<xs:complexType>
  <xs:sequence>  
    <xs:element ref="Symbol"/>
  </xs:sequence>
  <xs:attribute name="symbol" use="required" type="xs:NCName"/>
</xs:complexType>
</xs:element>
<xs:element name="Symbol" type="xs:NCName"/>
</xs:schema>

当我使用xjc进行编译时，我收到以下错误消息：

When I am compiling with xjc I am getting the following error message:

[错误]属性符号已定义。使用< jaxb：property>来解决此冲突。

[ERROR] Property "Symbol" is already defined. Use <jaxb:property> to resolve this conflict.

我基本上在SO上找到了这个解决方案（ JAXB编译问题 - [错误]属性任何已定义）但我无法使其工作。我猜我的XPath是错误的。

I basically found the solution for this here on SO (JAXB Compiling Issue - [ERROR] Property "Any" is already defined) but I can't get it to work. I am guessing my XPath is wrong.

这是我正在使用的绑定文件：

This is the binding file I am using:

<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
      xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      version="2.1">
<bindings schemaLocation="yahoo.xsd" version="1.0" >
    <!-- rename the value element -->
        <bindings node="//xs:element[@name='quote']/xs:complexType/xs:sequence/xs:element[@ref='Symbol']">
            <property name="SymbolAttribute"/>
    </bindings>
</bindings>

如果我现在正在编译xjc -b它表示XPath评估会产生一个空的目标节点。

If I am now compiling with xjc -b it says that the XPath evaluation results in an empty target node.

我可能要重命名Symbol定义，然后重命名ref？如何自动执行此操作？

I probably have to rename the Symbol definition and then the ref as well? how to do this automatically?

推荐答案

让我问一下这句话：

<xs:element ref="Symbol"/>

是在yahoo.xsd中定义的符号还是在同一个xsd文件中的本地？

is Symbol defined in yahoo.xsd or locally in the same xsd file?

我会尝试推断一些事实。

I'll try to deduce some facts.

我假设您有两个XSD： yahoo.xsd 和 some.xsd （你帖子中的第一个）。
我有很强的信心符号类型在 some.xsd 中定义，而不是在 yahoo.xsd 。如果是这样，我会期待一些名称空间前缀（雅虎：符号？）。

I assume you have two XSDs: yahoo.xsd and some.xsd (first one in your post). I have strong confidence "Symbol" type is defined in some.xsd and not in yahoo.xsd. If it were otherwise i would expect some namespace prefix ("yahoo:Symbol" ?).

现在，你的some.xsd看起来是这样的：

Now, is it true your some.xsd looks similar to this:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" >
    <!-- It's not important right now: -->
    <!--<xs:import namespace="http://www.yahooapis.com/v1/base.rng" schemaLocation="yahoo.xsd"/>-->

    <!-- declaration you omitted in your post, it's only example -->
    <xs:element name="Symbol">
        <xs:simpleType>
            <xs:restriction base="xs:integer">
              <xs:minInclusive value="0"/>
              <xs:maxInclusive value="100"/>
            </xs:restriction>
        </xs:simpleType>
    </xs:element>

    <xs:element name="quote">
        <xs:complexType>
          <xs:sequence>  
            <xs:element ref="Symbol"/>
          </xs:sequence>
          <xs:attribute name="symbol" use="required" type="xs:NCName"/>
        </xs:complexType>
    </xs:element>
</xs:schema>

如果我说的是真的，那么你的jaxb绑定应该是这样的：

If what i say is true, then your jaxb binding should look like this:

<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
      xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
      xmlns:xs="http://www.w3.org/2001/XMLSchema"
      version="2.1">
    <bindings schemaLocation="some.xsd"> <!-- not yahoo.xsd -->
        <bindings node="//xs:element[@name='quote']/xs:complexType/xs:sequence/xs:element[@ref='Symbol']">
            <property name="SymbolAttribute" />
        </bindings>
    </bindings>

</bindings>

生成的java类将是：

And generated java class will be:

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "symbolAttribute"
})
@XmlRootElement(name = "quote")
public class Quote {

    @XmlElement(name = "Symbol")
    protected int symbolAttribute;
    @XmlAttribute(name = "symbol", required = true)
    @XmlJavaTypeAdapter(CollapsedStringAdapter.class)
    @XmlSchemaType(name = "NCName")
    protected String symbol;
    ....

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