Autotype ant task and java source file having method which returns hashmap

Hi Friends,
I am using autotype ant task to generate types.xml and supporting java classes.
The task is defined as follows .
<target name="std">
<source2wsdd javaSource="HelloWorld.java"
typesInfo="types.xml"
ddFile="ddfiles/web-services.xml"
serviceURI="/HelloWorldService"/>
</target>
In my java source i have method which is returning an HashMap. In this scenario I am getting error when i run the task. The error is as follows
C:\test-ws\javaclass>ant auto
Buildfile: build.xml
auto:
[autotype] Autotyping for javaTypes TestBean
[autotype] weblogic.xml.schema.binding.BindingException: Invalid class received
: interface java.util.Map loaded from file:/C:/bea/jdk142_05/jre/lib/rt.jar!/jav
a/util/Map.class. All classes that will be serialized or deserialized must be n
on-interface, non-abstract classes that provide a public default constructor
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.en
sureValidClass(JavaInspector.java:1050)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.fi
llDescriptor(JavaInspector.java:174)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.ge
tDescriptor(JavaInspector.java:139)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.cr
eateBeanProperty(JavaInspector.java:927)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.cr
eateBeanProperty(JavaInspector.java:905)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.ad
dPropertiesToScalar(JavaInspector.java:834)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.fi
llDescriptor(JavaInspector.java:209)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.ge
tDescriptor(JavaInspector.java:139)
[autotype] at weblogic.xml.schema.binding.internal.codegen.JavaInspector.cr
eateDescriptorForClass(JavaInspector.java:106)
[autotype] at weblogic.xml.schema.binding.internal.codegen.Compiler.compile
(Compiler.java:106)
[autotype] at weblogic.xml.schema.binding.internal.XSDTypeMappingBuilder.ma
pClass(XSDTypeMappingBuilder.java:89)
[autotype] at weblogic.xml.schema.binding.internal.XSDTypeMappingBuilder.ma
pClass(XSDTypeMappingBuilder.java:102)
[autotype] at weblogic.xml.schema.binding.internal.TypeMappingBuilderBase.a
ddMapping(TypeMappingBuilderBase.java:180)
[autotype] at weblogic.webservice.tools.build.internal.Java2SchemaImpl.doTy
peMapping(Java2SchemaImpl.java:267)
[autotype] at weblogic.webservice.tools.build.internal.Java2SchemaImpl.run(
Java2SchemaImpl.java:167)
[autotype] at weblogic.ant.taskdefs.webservices.javaschema.JavaSchema.doJav
a2Schema(JavaSchema.java:302)
[autotype] at weblogic.ant.taskdefs.webservices.javaschema.JavaSchema.execu
te(JavaSchema.java:184)
[autotype] at org.apache.tools.ant.Task.perform(Task.java:341)
[autotype] at org.apache.tools.ant.Target.execute(Target.java:309)
[autotype] at org.apache.tools.ant.Target.performTasks(Target.java:336)
[autotype] at org.apache.tools.ant.Project.executeTarget(Project.java:1339)
[autotype] at org.apache.tools.ant.Project.executeTargets(Project.java:1255
[autotype] at org.apache.tools.ant.Main.runBuild(Main.java:609)
[autotype] at org.apache.tools.ant.Main.start(Main.java:196)
[autotype] at org.apache.tools.ant.Main.main(Main.java:235)
BUILD FAILED
file:C:/test-ws/javaclass/build.xml:62: weblogic.webservice.tools.build.WSBuildE
xception: Failed to do type mapping - with nested exception:
[weblogic.xml.schema.binding.BindingException: Invalid class received: interface
java.util.Map loaded from file:/C:/bea/jdk142_05/jre/lib/rt.jar!/java/util/Map.
class. All classes that will be serialized or deserialized must be non-interfac
e, non-abstract classes that provide a public default constructor]
Can any one provide the solution for this
Thanks
Anantha

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