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  1. PO
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    <p>The <a href="https://stackoverflow.com/questions/6084895/xmlelements-marked-with-xmljavatypeadapters/6103442#6103442">answer given by bamana</a> is correct, however the exception you are seeing is due to a bug in the JAXB reference implementation. This bug also existed in <a href="http://www.eclipse.org/eclipselink/moxy.php" rel="nofollow noreferrer">EclipseLink JAXB (MOXy)</a> but has been fixed in the 2.3.0 stream, a nighty download can be obtained here:</p> <ul> <li><a href="http://www.eclipse.org/eclipselink/downloads/nightly.php" rel="nofollow noreferrer">http://www.eclipse.org/eclipselink/downloads/nightly.php</a></li> </ul> <p>As a workaround you could use the XmlAdapter approach that was in your original question:</p> <p><strong>SimpleAdapter</strong></p> <pre><code>import javax.xml.bind.annotation.adapters.XmlAdapter; public class SimpleAdapter extends XmlAdapter&lt;String, Simple&gt; { @Override public Simple unmarshal(String v) throws Exception { Simple simple = new Simple(); simple.setSimple(v); return simple; } @Override public String marshal(Simple v) throws Exception { return v.getSimple(); } } </code></pre> <p><strong>Simple</strong></p> <pre><code>import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter; @XmlJavaTypeAdapter(SimpleAdapter.class) public class Simple extends Value { private java.lang.String simple; public java.lang.String getSimple() { return simple; } public void setSimple(java.lang.String simple) { this.simple = simple; } } </code></pre> <p><strong>Compound</strong></p> <pre><code>import java.util.List; import javax.xml.bind.annotation.*; @XmlRootElement(name = "compound") @XmlAccessorType(XmlAccessType.FIELD) public class Compound extends Value { @XmlElements({ @XmlElement(name = "simple", type = Simple.class), @XmlElement(name = "compound", type = Compound.class) }) protected List&lt;Value&gt; value; public List&lt;Value&gt; getValue() { return value; } public void setValue(List&lt;Value&gt; value) { this.value = value; } } </code></pre> <p><strong>Value</strong></p> <pre><code>import java.io.Serializable; public abstract class Value implements Serializable {} </code></pre> <p><strong>Demo</strong></p> <pre><code>import java.io.File; import javax.xml.bind.JAXBContext; import javax.xml.bind.Marshaller; import javax.xml.bind.Unmarshaller; public class Demo { public static void main(String[] args) throws Exception { JAXBContext jc = JAXBContext.newInstance(Compound.class); Unmarshaller unmarshaller = jc.createUnmarshaller(); Compound compound = (Compound) unmarshaller.unmarshal(new File("input.xml")); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(compound, System.out); } } </code></pre> <p><strong>input.xml</strong></p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt; &lt;compound&gt; &lt;simple&gt; &lt;simple&gt;FOO&lt;/simple&gt; &lt;/simple&gt; &lt;compound/&gt; &lt;/compound&gt; </code></pre>
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    1. PO@XmlElements marked with @XmlJavaTypeAdapters?
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    1. USCommunity
    1. USBlaise Doughan
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    1. COThat was exactly my original idea, but i don't want a simple to be marshalled like your input file, without that inner <simple> wrapper.
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      1. USAndrea Boscolo
    2. CO@ciosbel - I believe the behaviour you are seeing is a bug, I am currently trying to fix this behaviour in EclipseLink JAXB (MOXy). However if you do use MOXy you can just use the `@XmlValue` without the `@XmlJavaTypeAdapter` anyways.
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      1. USBlaise Doughan
    3. CO@ciosbel - You can track the progress of this issue in EclipseLink JAXB (MOXy) via the following bug: https://bugs.eclipse.org/347026
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      1. USBlaise Doughan
 

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