解决 JAXB 编译包含的 XSD 中的命名冲突
我目前正在尝试使用 JAXB(IBM build 2.1.3)将一对模式文件编译到同一个包中。每个都会单独编译,但是当尝试将它们编译在一起时,由于包含而出现元素命名冲突。我的问题是;有没有办法通过外部绑定指定命名冲突的解决方案。
示例文件如下。在示例中,有问题的元素称为“Common”,它在 incA 和 incB 中均定义:
incA.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.example.org/"
xmlns:tns="http://www.example.org/" elementFormDefault="qualified">
<complexType name="TypeA">
<sequence>
<element name="ElementA" type="string"></element>
</sequence>
</complexType>
<!-- Conflicting element -->
<element name="Common" type="tns:TypeA"></element>
</schema>
incB.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.example.org/"
xmlns:tns="http://www.example.org/" elementFormDefault="qualified">
<complexType name="TypeB">
<sequence>
<element name="ElementB" type="int"></element>
</sequence>
</complexType>
<!-- Conflicting element -->
<element name="Common" type="tns:TypeB"></element>
</schema>
A.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.example.org/"
elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:tns="http://www.example.org/">
<include schemaLocation="incA.xsd"></include>
<complexType name="A">
<sequence>
<element ref="tns:Common"></element>
</sequence>
</complexType>
</schema>
B.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.example.org/"
elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:tns="http://www.example.org/">
<include schemaLocation="incB.xsd"></include>
<complexType name="B">
<sequence>
<element ref="tns:Common"></element>
</sequence>
</complexType>
</schema>
当两者都是从 xjb 的一次调用编译时,会出现编译器错误:(
[ERROR] 'Common' is already defined line 9 of file:/C:/temp/incB.xsd [ERROR] (related to above error) the first definition appears here line 9 of file:/C:/temp/incA.xsd
作为参考,此是解决编译 OAGIS8 SP3 包问题的概括)
I am currently trying to compile with JAXB (IBM build 2.1.3) a pair of schema files into the same package. Each will compile on it's own, but when trying to compile them together i get a element naming conflict due to includes. My question is; is there a way to specify with an external binding a resolution to the naming collision.
Example files follow. In the example the offending element is called "Common", which is defined in both incA and incB:
incA.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.example.org/"
xmlns:tns="http://www.example.org/" elementFormDefault="qualified">
<complexType name="TypeA">
<sequence>
<element name="ElementA" type="string"></element>
</sequence>
</complexType>
<!-- Conflicting element -->
<element name="Common" type="tns:TypeA"></element>
</schema>
incB.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.example.org/"
xmlns:tns="http://www.example.org/" elementFormDefault="qualified">
<complexType name="TypeB">
<sequence>
<element name="ElementB" type="int"></element>
</sequence>
</complexType>
<!-- Conflicting element -->
<element name="Common" type="tns:TypeB"></element>
</schema>
A.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.example.org/"
elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:tns="http://www.example.org/">
<include schemaLocation="incA.xsd"></include>
<complexType name="A">
<sequence>
<element ref="tns:Common"></element>
</sequence>
</complexType>
</schema>
B.xsd
<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.example.org/"
elementFormDefault="qualified" xmlns="http://www.w3.org/2001/XMLSchema"
xmlns:tns="http://www.example.org/">
<include schemaLocation="incB.xsd"></include>
<complexType name="B">
<sequence>
<element ref="tns:Common"></element>
</sequence>
</complexType>
</schema>
Compiler error when both are compiled from one evocation of xjb:
[ERROR] 'Common' is already defined line 9 of file:/C:/temp/incB.xsd [ERROR] (related to above error) the first definition appears here line 9 of file:/C:/temp/incA.xsd
(For reference, this is a generalization to resolve an issue with compiling the OAGIS8 SP3 package)
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通过进一步的研究,我已经确定,由于名称空间冲突,尝试一次编译所有这些片段是不可能的。我决定的解决方法是将每组模式子集编译到它们自己的包中,并在尝试解组之前对传入的 XML 执行启发式测试。
I have determined though further research that trying to compile all these fragments at once is impossible, due to the name-space collision. The work around I decided upon was to compile each set of schema subsets into their own packages, and perform a heuristic test on the incoming XML before attempting to unmarshal it.