jaxb2 simplify plugin for xs:choice having same types

Question

I'm trying to use jaxb2 basics simplify plugin for my schema to JAXB conversion. It works fine for the complex types like below. Each element is defined inside the xs:choice has different types (type1 and type2).

sample.xsd (complex choice type with different type)

<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>

But if the complex type contains more than one element with same type (xs:string), as shown below, then maven install throws error.

sample.xsd (complex choice type with same type)

<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>

Does jaxb2 simplify will not work if I have same types for more than one elements ?

[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

It should work, but try customizing one of the xs:elements instead.

Depending on the property type produced, you'll need to customize either xs:choice or one of the child xs:elements.

If you get an "elements" property, customize xs:choice. See the documentation. This is what you have in the first case.

If you get an "element references" property, customize one of the xs:elements. See the documentation. This is what you have in the second case.