Property 'XXXX' is already defined. Use <jaxb:property> to resolve this conflict.

[martosoler]

I'm trying to generate the Java classes from a zip file with a bunch of schemas files plus some binding files.
My gradle build file is as follows:

dependencies {
    jaxb 'com.sun.xml.bind:jaxb-xjc:2.2.7-b41' //jaxws 2.2.6 uses jaxb 2.2.5, but can't dL 2.2.5 from maven the pom is off TODO
    jaxb 'com.sun.xml.bind:jaxb-impl:2.2.7-b41'
    jaxb 'javax.xml.bind:jaxb-api:2.2.7'

    jaxb "org.jvnet.jaxb2_commons:jaxb2-basics-ant:0.6.5"
    jaxb "org.jvnet.jaxb2_commons:jaxb2-basics-annotate:0.6.5"
}

jaxb {
    xsdDir = "/src/main/resources/schema"
    bindings = ["bindings.xjc","bindings2.xjc"]
    xjc {
        taskClassname      = "org.jvnet.jaxb2_commons.xjc.XJC2Task"
        generatePackage    = "com.soler.xsd"
        args               = ["-Xannotate"]
    }
}

When I execute gradle xjc, I'm getting the following error:

14:02:32.917 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc] [ERROR] Property "Type" is already defined. Use <jaxb:property> to resolve this conflict.
14:02:32.921 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc]   line 494 of file:/C:/dev/XXX/src/main/resources/schema/external/YYY/ZZZ.xsd
14:02:32.922 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc]
14:02:32.923 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc] [ERROR] The following location is relevant to the above error
14:02:32.923 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc]   line 540 of file:/C:/dev/XXX/src/main/resources/schema/external/YYY/ZZZ.xsd
14:02:32.924 [ERROR] [org.gradle.api.internal.project.ant.AntLoggingAdapter] [ant:xjc]
14:02:32.941 [ERROR] [org.gradle.BuildExceptionReporter]
14:02:32.942 [ERROR] [org.gradle.BuildExceptionReporter] FAILURE: Build failed with an exception.
14:02:32.944 [ERROR] [org.gradle.BuildExceptionReporter]
14:02:32.945 [ERROR] [org.gradle.BuildExceptionReporter] * What went wrong:
14:02:32.945 [ERROR] [org.gradle.BuildExceptionReporter] Execution failed for task ':ext/stix:xjc'.
14:02:32.946 [ERROR] [org.gradle.BuildExceptionReporter] > unable to parse the schema. Error messages should have been provided
14:02:32.948 [ERROR] [org.gradle.BuildExceptionReporter]
14:02:32.949 [ERROR] [org.gradle.BuildExceptionReporter] * Try:
14:02:32.950 [ERROR] [org.gradle.BuildExceptionReporter] Run with --stacktrace option to get the stack trace.

Many places recommend the following link Dealing with errors but I'm not sure how that applies to this plugin.

Thanks

[tkent]

@martosoler you may have already realized this, given the age of this post, but the cause of your issue isn't this plugin. It's a legit problem that is causing xjc to be unable to create a class for an element.

The most likely culprit, in my experience, is that a child element and attribute have the same name (if a case-insensitive match is done). These happen often and are short work to square up using and xjb file to ensure distinct names. For example

...
  <jaxb:bindings schemaLocation="file:/C:/dev/XXX/src/main/resources/schema/external/YYY/ZZZ.xsd">
    <jaxb:schemaBindings>
      <jaxb:package name="com.soler.xsd"/>
    </jaxb:schemaBindings>
    <!-- Used to avoid the duplicate element/attribute name conflict -->
    <jaxb:bindings node="//xsd:attribute[@name='dataSource']">
      <jaxb:property name="typeAttr"/>
    </jaxb:bindings>
  </jaxb:bindings>
...

[wdschei]

@martosoler & @tkent

The OpenRepose.org updated version of this plugin is now available in the Gradle Plugins repository and is compatible with JSE7.