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POJAXB ignores HashMap properties?
 

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    <p>I'm using the JAXB implementation that comes with J2SE to serialize a bean that contains a HashMap property. I would assume that this should work out of the box since <a href="http://jaxb.java.net/guide/Mapping_your_favorite_class.html" rel="nofollow">this</a> states</p> <blockquote> <p>JAXB spec defines a special handling for Map when it's used as a propety of a bean. For example, the following bean would produce XMLs like the following: ...</p> </blockquote> <p>This more or less works unless the structure has more than one level, i.e. the HashMap is a property of a bean that is a property of a bean - like this:</p> <pre><code>import java.util.HashMap; import javax.xml.bind.annotation.XmlRootElement; import javax.xml.bind.annotation.XmlElement; import javax.xml.bind.JAXB; class bean { @XmlElement public HashMap&lt;String,String&gt; map; } @XmlRootElement class b2 { @XmlElement public bean b; } class foo { public static void main(String args[]) { try { bean b = new bean(); b.map = new HashMap&lt;String,String&gt;(); b.map.put("a","b"); b2 two = new b2(); two.b=b; JAXB.marshal(two, System.out); } catch (Exception e) { System.out.println("Exception: " + e.toString()); } } } </code></pre> <p>This outputs <code>&lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt;&lt;b2&gt;&lt;b&gt;&lt;map/&gt;&lt;/b&gt;&lt;/b2&gt;</code> instead of a correctly formatted HashMap. It works if I annotate <code>bean</code> with <code>@XmlRootElement</code> and remove the <code>@XmlElement</code> from <code>map</code>, but I don't see why that should be necessary. Is it supposed to be like that? </p>
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