有没有办法处理 JAXB 中多个 .xsd 文件中的重复元素定义?

2022-01-19 00:00:00 java maven jaxb maven-jaxb2-plugin maven-plugin

我有几十个 .xsd 文件要为其自动生成代码.当我尝试同时生成所有文件时，其中一些文件的名称会发生​​冲突.

I have dozens and dozens .xsd files that I want to auto-generate code for. A couple of the files have duplicate names that clash when I try to generate all of them at the same time.

我只专注于尝试让其中 2 个发挥作用.

I am focusing on just trying to get 2 of these to work.

当我得到这 2 个工作时，我会解决其余的问题.但我现在只关注其中两个文件.我无法控制它们，它们来自供应商并遵循标准"，因此出于多种原因编辑它们不是一种选择.

When I get these 2 working I will fix the rest. But I am just focusing on 2 of these files for now. I am not in control of them, they are from a vendor and follow a "standard", so editing them is not an option for multiple reasons.

我正在使用 maven-jaxb2-plugin 来处理这些文件.

I am using the maven-jaxb2-plugin to process these files.

我添加了一个 binding.xjb 文件，如 mat b 的答案中的链接和我在网上找到的其他说明中所建议的那样.但是我收到以下错误，没有输出.

I added a binding.xjb file as suggested in the link in mat b's answer and other instructions I have found on the web. But I am getting the following errors, an no output.

<?xml version="1.0" encoding="UTF-8"?>
<jxb:bindings version="2.1"
              xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance"
              xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc"
              xmlns:jxb="http://java.sun.com/xml/ns/jaxb"
              xmlns:xs="http://www.w3.org/2001/XMLSchema"
              xsi:schemaLocation=" http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd">
  <jxb:bindings schemaLocation="mac-3.4.xsd">
    <jxb:schemaBindings>
      <jxb:package name="my.company.mac"/>
    </jxb:schemaBindings>
  </jxb:bindings>
  <jxb:bindings schemaLocation="mac-stylesheet-3.4.xsd">
    <jxb:schemaBindings>
      <jxb:package name="my.company.stylesheet"/>
    </jxb:schemaBindings>
  </jxb:bindings>
</jxb:bindings>

出现以下错误

[ERROR] Error while parsing schema(s).Location [ file:/C:/Users/Jarrod%20Roberson/Projects/spa-tools/spa-lib/src/main/sc
hema/mac-stylesheet-3.4.xsd{165,33}].
org.xml.sax.SAXParseException: 'halign' is already defined

有问题的元素是:(还有很多其他的，这只是第一个冲突的)

The offending element is : ( there are many others this is just the first one that clashes )

<xsd:simpleType name="halign">
  <xsd:restriction base="xsd:string">
    <xsd:enumeration value="left" />
    <xsd:enumeration value="center" />
    <xsd:enumeration value="right" />
  </xsd:restriction>
</xsd:simpleType>

并且在每个 .xsd 文件中都是相同的，我如何解决这种重复问题，要么只生成一个类，要么将每个类都生成到它们自己的包命名空间中?

And is identical in each of the .xsd files, how do I resolve this duplication with either only one class being generated or each one being generated in to their own package namespace?

这不是唯一一个像这样的重复元素，它们有很多，所以仅仅尝试从文件中删除它们也不是一种选择.

This isn't the only duplicate element like this there are lots of them, so just trying to remove them from the files isn't a option either.

这个 halign 位于多个 .xsd 文件中，我想将它们放在各自的包中，或者能够告诉编译器使用第一个生成了.

This halign is in multiple .xsd files and I want to either put them in their individual packages, or be able to tell the compiler to use the first one that was generated.

这是我在尝试外部 .xjb 文件之前开始的地方，只需在 pom.xml 中指定 package.

This is where I started off before I tried an external .xjb file, by just specifying the package in the pom.xml.

如何将绑定配置为忽略重复配置、将它们映射到单独的包或将它们映射到现有实现?

推荐答案

我对此有一个中途的解决方案，但它非常耗时.我必须为每个具有重复条目的文件创建一个单独的 <execution/>.

I have a half-way workaround solution to this, but it is very time intensive. I had to create a separate <execution/> for every one of the files that has duplicate entries.

<executions>
  <execution>
    <id>jaxb-mac</id>
    <phase>generate-sources</phase>
    <goals>
      <goal>generate</goal>
    </goals>
    <configuration>
      <forceRegenerate>true</forceRegenerate>
      <generatePackage>my.company.mac</generatePackage>
      <schemaDirectory>src/main/schema</schemaDirectory>
      <schemaIncludes>
        <include>mac-3.4.xsd</include>
      </schemaIncludes>
    </configuration>
  </execution>
  <execution>
    <id>jaxb-stylesheet</id>
    <phase>generate-sources</phase>
    <goals>
      <goal>generate</goal>
    </goals>
    <configuration>
      <forceRegenerate>true</forceRegenerate>
      <generatePackage>my.company.stylesheet</generatePackage>
      <schemaDirectory>src/main/schema</schemaDirectory>
      <schemaIncludes>
        <include>mac-stylesheet-3.4.xsd</include>
      </schemaIncludes>
    </configuration>
  </execution>

<forceRegenerate>true</forceRegenerate> 很重要，否则只有第一个 <execution/> 会运行，其余的会认为没有需要运行，因为我正在生成到同一个目录.

The <forceRegenerate>true</forceRegenerate> is important or only the first <execution/> will run and the rest will think that there is no need to run because I am generating into the same directory.

我仍然想要一种劳动强度较低的解决方案来处理重复项.

I would still like a less labor intensive solution to deal with the duplicates.

我认为，如果我将第一个主 .xsd 设为一个单独的模块，并构建到它自己的 .jar 文件中，那么我可以使用 <episode/> 标记并让它跳过生成一遍又一遍地重复相同的元素，因为它们在定义上是相同的.

I think if I make the first master .xsd a separate module that builds into its own .jar file, I could then use the <episode/> tag and have it skip generating the same duplicate elements over and over, since they are identical in definition.

我已经决定尽可能放弃 XML 和完全的 JAXB.截至本次编辑，有更新更好的方法来解析 XML 并将其映射到对象.

相关文章