我在为一组模式构建 JAXB 绑定时遇到了一些麻烦,这让我有点笨拙。这是有问题的架构(它只是此特定构建中的可能架构之一):
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:xml="http://www.w3.org/XML/1998/namespace" targetNamespace="http://www.w3.org/XML/1998/namespace">
<attribute name="lang" type="language">
<annotation>
<documentation>In due course, we should install the relevant ISO 2- and 3-letter
codes as the enumerated possible values . . .</documentation>
</annotation>
</attribute>
<attribute name="space" default="preserve">
<simpleType>
<restriction base="NCName">
<enumeration value="default"/>
<enumeration value="preserve"/>
</restriction>
</simpleType>
</attribute>
<attributeGroup name="specialAttrs">
<attribute ref="xml:lang"/>
<attribute ref="xml:space"/>
</attributeGroup>
xjc 声称上面声明的属性已经在其他地方声明:
parsing a schema...
[ERROR] 'lang' is already defined
line 26 of file:../../gml/3.1.1/smil/xml-mod.xsd
[ERROR] (related to above error) the first definition appears here
line 88 of http://www.w3.org/2001/03/xml.xsd
[ERROR] 'space' is already defined
line 34 of file:../../gml/3.1.1/smil/xml-mod.xsd
[ERROR] (related to above error) the first definition appears here
line 95 of http://www.w3.org/2001/03/xml.xsd
[ERROR] 'specialAttrs' is already defined
line 39 of file:../../gml/3.1.1/smil/xml-mod.xsd
[ERROR] (related to above error) the first definition appears here
line 111 of http://www.w3.org/2001/03/xml.xsd
Failed to parse a schema.
做一些研究会让我相信问题是我需要一个绑定文件来解决重复的属性......而且我有一个:
<jaxb:bindings version="1.0" xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc" jaxb:extensionBindingPrefixes="xjc">
<jaxb:bindings schemaLocation="../../gml/3.1.1/smil/xml-mod.xsd" node="/xs:schema">
<jaxb:bindings node="//xs:attribute[@name='lang']">
<jaxb:property name="langAttribute"/>
</jaxb:bindings>
<jaxb:bindings node="//xs:attribute[@name='space']">
<jaxb:property name="spaceAttribute"/>
</jaxb:bindings>
<jaxb:bindings node="//xs:attributeGroup[@name='specialAttrs']">
<jaxb:property name="specialAttrsAttribute"/>
</jaxb:bindings>
</jaxb:bindings>
然而问题依然存在。带有或不带有绑定文件的错误消息是相同的。我知道该文件正在被使用,因为如果我弄乱了节点选择器的 xpath,我会收到一条错误消息。就像 xjc 知道绑定文件在那里但忽略它。
这是无法构建绑定的命令行:
C:\tools\jaxb-ri-20110512\bin\xjc -episode ..\..\..\common.ogc -d ..\..\..\src -p com.ogc.bindings -b ..\..\..\bindings.xsd -catalog ..\..\..\ogc.cat -extension sosAll.xsd
我已经在 jdk6 本机 jaxb (2.0) 和 jaxb 2.2.4 上尝试过这个(我在认可目录中安装了 jaxb-api.jar)