jaxb2 简化具有相同类型的 xs:choice 的插件

Question

我正在尝试使用 jaxb2 basics simplify 插件将我的模式转换为 JAXB。它适用于如下所示的复杂类型。 xs:choice里面定义的每个元素都有不同的类型（type1和type2）。

sample.xsd（不同类型的复选类型）

<xs:complexType name="doclist">
    <xs:sequence>
        <xs:choice minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
                <xs:appinfo>
                    <simplify:as-element-property />
                </xs:appinfo>
            </xs:annotation>
            <xs:element name="document1" type="type1" />
            <xs:element name="document2" type="type2" />
        </xs:choice>
    </xs:sequence>
    <xs:attribute name="heading" type="xs:string" />
</xs:complexType>

但是如果复杂类型包含多个相同类型的元素（xs:string），如下所示，那么 maven install 会抛出错误。

sample.xsd（复选类型同类型）

<xs:complexType name="addressTEST">
    <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:annotation>
            <xs:appinfo>
                <simplify:as-element-property />
            </xs:appinfo>
        </xs:annotation>
        <xs:element name="street" type="xs:string" />
        <xs:element name="city" type="xs:string" />
    </xs:choice>
</xs:complexType>

如果我对多个元素使用相同的类型，jaxb2 simplify 是否不起作用？

[ERROR] Error while parsing schema(s).Location [ file:/D:/workspace/trunk/sampmes/src/main/resources/sample.xsd{1099,38}].
com.sun.istack.SAXParseException2: compiler was unable to honor this as-element-property customization. It is attached to a wrong place, or its inconsistent with other bindings.
    at com.sun.tools.xjc.ErrorReceiver.error(ErrorReceiver.java:82)
    at com.sun.tools.xjc.reader.xmlschema.ErrorReporter.error(ErrorReporter.java:79)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.check(UnusedCustomizationChecker.java:144)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.check(UnusedCustomizationChecker.java:122)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.modelGroup(UnusedCustomizationChecker.java:220)
    at com.sun.xml.xsom.impl.ModelGroupImpl.visit(ModelGroupImpl.java:125)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.particle(UnusedCustomizationChecker.java:241)
    at com.sun.xml.xsom.impl.ParticleImpl.visit(ParticleImpl.java:124)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.complexType(UnusedCustomizationChecker.java:182)
    at com.sun.xml.xsom.impl.ComplexTypeImpl.visit(ComplexTypeImpl.java:295)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.run(UnusedCustomizationChecker.java:108)
    at com.sun.tools.xjc.reader.xmlschema.UnusedCustomizationChecker.run(UnusedCustomizationChecker.java:98)
    at com.sun.tools.xjc.reader.xmlschema.BGMBuilder._build(BGMBuilder.java:187)
    at com.sun.tools.xjc.reader.xmlschema.BGMBuilder.build(BGMBuilder.java:116)
    at com.sun.tools.xjc.ModelLoader.annotateXMLSchema(ModelLoader.java:415)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:167)
    at com.sun.tools.xjc.ModelLoader.load(ModelLoader.java:113)
    at org.jvnet.mjiip.v_2_1.XJC21Mojo.loadModel(XJC21Mojo.java:50)
    at org.jvnet.mjiip.v_2_1.XJC21Mojo.doExecute(XJC21Mojo.java:40)
    at org.jvnet.mjiip.v_2_1.XJC21Mojo.doExecute(XJC21Mojo.java:28)
    at org.jvnet.jaxb2.maven2.RawXJC2Mojo.doExecute(RawXJC2Mojo.java:505)
    at org.jvnet.jaxb2.maven2.RawXJC2Mojo.execute(RawXJC2Mojo.java:328)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke(Method.java:597)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)

Answer 1

应该可以，但请尝试自定义 xs:element 之一。

根据生成的属性类型，您需要自定义 xs:choice 或其中一个子 xs:elements.

如果您获得 "elements" 属性，请自定义 xs:choice。参见 the documentation。这就是第一种情况。

如果您获得 "element references" 属性，请自定义其中一个 xs:elements。参见 the documentation。这就是第二种情况。

jaxb2 简化具有相同类型的 xs:choice 的插件

jaxb2 simplify plugin for xs:choice having same types

jaxb2-maven-plugin

jaxb2-basics

jaxb2-simplify-plugin