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POXml Deserilization is not working using Xstream
 

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  1. POXml Deserilization is not working using Xstream
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    <p>I have a following class which is serializing </p> <blockquote> <p>org.springframework.integration.core.Message</p> </blockquote> <p>into file as follows:</p> <p><strong>Sample.java</strong></p> <pre><code>public static void receive(Message&lt;?&gt; message) throws IOException, MessagingException { XStream xStream = new XStream(); File file = new File("c:/temp/temp.xml"); FileOutputStream fileOutputStream = new FileOutputStream(file); xStream.toXML(message,fileOutputStream); } </code></pre> <p><strong>UnMarshall.java</strong></p> <pre><code>public static void main(String[] args) throws IOException, MessagingException, ClassNotFoundException { XStream xStream = new XStream(); File file = new File("c:/temp/temp.xml"); FileInputStream fileOutputStream = new FileInputStream(file); Message message = (Message) xStream.fromXML(fileOutputStream); } </code></pre> <p>If I run UnMarshall.java then I am getting the following exception:</p> <p><strong>Question</strong></p> <ul> <li>Is it possible to do serialize/deserialize Message object with XStream?</li> <li><p>If not what other options I have?</p> <p>Exception in thread "main" com.thoughtworks.xstream.converters.ConversionException: Cannot construct class java.lang.Class ---- Debugging information ---- message : Cannot construct class java.lang.Class cause-exception : java.lang.InstantiationException cause-message : javax.activation.ActivationDataFlavor class : org.springframework.integration.message.GenericMessage required-type : javax.activation.ActivationDataFlavor path : /org.springframework.integration.message.GenericMessage/payload/dh/dataContentHandler/dch/myDF line number : 14 ------------------------------- at com.thoughtworks.xstream.converters.reflection.ExternalizableConverter.unmarshal(ExternalizableConverter.java:110) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.annotations.AnnotationReflectionConverter.unmarshallField(AnnotationReflectionConverter.java:66) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:188) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.annotations.AnnotationReflectionConverter.unmarshallField(AnnotationReflectionConverter.java:66) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:188) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.annotations.AnnotationReflectionConverter.unmarshallField(AnnotationReflectionConverter.java:66) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:188) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.annotations.AnnotationReflectionConverter.unmarshallField(AnnotationReflectionConverter.java:66) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:188) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.annotations.AnnotationReflectionConverter.unmarshallField(AnnotationReflectionConverter.java:66) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:188) at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125) at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56) at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45) at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46) at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117) at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:29) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:846) at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:833) at com.thoughtworks.xstream.XStream.fromXML(XStream.java:789) at org.springframework.integration.samples.mail.imapidle.DefaultEmailReceiverUtilService.main(DefaultEmailReceiverUtilService.java:103) Caused by: java.lang.InstantiationException: javax.activation.ActivationDataFlavor at java.lang.Class.newInstance0(Class.java:340) at java.lang.Class.newInstance(Class.java:308) at com.thoughtworks.xstream.converters.reflection.ExternalizableConverter.unmarshal(ExternalizableConverter.java:80) ... 39 more</p></li> </ul>
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    1. PTQuestion
    1. USMahendran
    1. USMahendran
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      1. VTUpMod
    1. COWell, `Message` is just an interface containing two methods. So without knowing what you are actually trying to (un)serialize it is hard to answer. Do you have an example of the xml generated?
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      1. USatomman
 

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