Using xStream_1_4_20, Not able to convert AtomicReference atomicRef = new AtomicReference(); with default value. It is giving NullpointerException.

[ajaysharma2]

It should handle NullpointerException
https://github.com/x-stream/xstream/blob/master/xstream/src/java/com/thoughtworks/xstream/converters/extended/AtomicReferenceConverter.java#L48

[ajaysharma2]

Issue can be tested with existing test case by adding AtomicReference atomicRef = new AtomicReference()
https://github.com/x-stream/xstream/blob/master/xstream/src/test/com/thoughtworks/acceptance/ConcurrentTypesTest.java#L101

Current Class for converter lookup...java.util.concurrent.atomic.AtomicReference cachedConverter .... null marshal source ..... null marshal source getting object .....ref.get() null Exception occured .... null ... null java.lang.NullPointerException at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:50) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller$1.convertAnother(AbstractReferenceMarshaller.java:87) at com.thoughtworks.xstream.converters.extended.AtomicReferenceConverter.marshal(AtomicReferenceConverter.java:50) at com.thoughtworks.xstream.core.AbstractReferenceMarshaller.convert(AbstractReferenceMarshaller.java:68) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:60) at com.thoughtworks.xstream.core.TreeMarshaller.convertAnother(TreeMarshaller.java:44) at com.thoughtworks.xstream.core.TreeMarshaller.start(TreeMarshaller.java:89) at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.marshal(AbstractTreeMarshallingStrategy.java:37) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1303) at com.thoughtworks.xstream.XStream.marshal(XStream.java:1292) at com.thoughtworks.xstream.XStream.toXML(XStream.java:1265) at com.thoughtworks.xstream.XStream.toXML(XStream.java:1252) at com.thoughtworks.acceptance.AbstractAcceptanceTest.toXML(AbstractAcceptanceTest.java:190) at com.thoughtworks.acceptance.AbstractAcceptanceTest.assertBothWays(AbstractAcceptanceTest.java:102) at com.thoughtworks.acceptance.Concurrent15TypesTest.testAtomicReference(Concurrent15TypesTest.java:107) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118)