java - 使用 jaxb-ri-2.2.7 的 ant schemagen 任务中的 ClassCastException

Question

我正在尝试使用来自 JAXB-RI 2.2.7 的 schemagen ant 任务，但我在 build.xml 中的 schemagen 任务上不断收到“BUILD FAILED .... Error starting ap”。相关节如下:

<taskdef name="schemagen" classname="com.sun.tools.jxc.SchemaGenTask">
  <classpath refid="compile.classpath"/>
</taskdef>

<target name="schemas" description="Compile all Java source files">
 <mkdir dir="${schemas.dir}" />
 <schemagen destdir="${schemas.dir}">
  <src path="${src.dir}"/>
  <classpath refid="compile.classpath" />
 </schemagen>
</target>

使用 -verbose，我得到下面的堆栈跟踪。我尝试使用谷歌搜索 ClassCastException 的详细信息，但没有找到任何内容。有什么建议么？

谢谢，亚当

BUILD FAILED
/home/adam/sandboxes/adam/sensei/code/trunk/repository/build.xml:99: Error starting ap
    at com.sun.tools.jxc.ApBasedTask$InternalApAdapter.execute(ApBasedTask.java:131)
    at com.sun.tools.jxc.ApBasedTask.compile(ApBasedTask.java:170)
    at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:930)
    at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
    at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
    at org.apache.tools.ant.Task.perform(Task.java:348)
    at org.apache.tools.ant.Target.execute(Target.java:435)
    at org.apache.tools.ant.Target.performTasks(Target.java:456)
    at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
    at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
    at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
    at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
    at org.apache.tools.ant.Main.runBuild(Main.java:851)
    at org.apache.tools.ant.Main.startAnt(Main.java:235)
    at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
    at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.RuntimeException: java.lang.AssertionError: java.lang.ClassCastException: com.sun.tools.javac.api.JavacTrees cannot be cast to com.sun.source.util.Trees
    at com.sun.tools.javac.main.Main.compile(Main.java:469)
    at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:132)
    at com.sun.tools.jxc.ApBasedTask$InternalApAdapter.execute(ApBasedTask.java:127)
    ... 18 more
Caused by: java.lang.AssertionError: java.lang.ClassCastException: com.sun.tools.javac.api.JavacTrees cannot be cast to com.sun.source.util.Trees
    at com.sun.source.util.Trees.getJavacTrees(Trees.java:84)
    at com.sun.source.util.Trees.instance(Trees.java:73)
    at com.sun.tools.jxc.model.nav.ApNavigator.getClassLocation(ApNavigator.java:410)
    at com.sun.tools.jxc.model.nav.ApNavigator.getClassLocation(ApNavigator.java:83)
    at com.sun.xml.bind.v2.model.impl.ClassInfoImpl.getLocation(ClassInfoImpl.java:1284)
    at com.sun.xml.bind.v2.runtime.IllegalAnnotationException.convert(IllegalAnnotationException.java:122)
    at com.sun.xml.bind.v2.runtime.IllegalAnnotationException.build(IllegalAnnotationException.java:106)
    at com.sun.xml.bind.v2.runtime.IllegalAnnotationException.<init>(IllegalAnnotationException.java:70)
    at com.sun.xml.bind.v2.model.impl.ClassInfoImpl.<init>(ClassInfoImpl.java:211)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.createClassInfo(ModelBuilder.java:399)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:257)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getClassInfo(ModelBuilder.java:227)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:375)
    at com.sun.xml.bind.v2.model.impl.ModelBuilder.getTypeInfo(ModelBuilder.java:390)
    at com.sun.tools.jxc.api.impl.j2s.JavaCompilerImpl.bind(JavaCompilerImpl.java:95)
    at com.sun.tools.jxc.ap.SchemaGenerator.process(SchemaGenerator.java:110)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:793)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:722)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1700(JavacProcessingEnvironment.java:97)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1029)
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1163)
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1108)
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:824)
    at com.sun.tools.javac.main.Main.compile(Main.java:439)
    ... 20 more
Caused by: java.lang.ClassCastException: com.sun.tools.javac.api.JavacTrees cannot be cast to com.sun.source.util.Trees
    at com.sun.source.util.Trees.getJavacTrees(Trees.java:82)
    ... 43 more

Answer 1

同样的问题。从堆栈跟踪我会说这是 JAXB 注释中的一些错误，但是当 xjc 尝试处理该异常时它因另一个异常而失败并且无法知道问题出在哪个类和属性中。