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POJSON marshaling of object arrays with JAXB
 

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    <p>Using MOXy I'm trying to marshal a java class like this to JSON:</p> <pre class="lang-java prettyprint-override"><code>@XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) public class Request { String method; @XmlAnyElement(lax=true) Object[] arguments; } </code></pre> <p>I would expect something like:</p> <pre class="lang-json prettyprint-override"><code>{ "method": "test", "arguments": ["a", "b"] } </code></pre> <p>but the JSON output results to:</p> <pre class="lang-json prettyprint-override"><code>{ "method": "test", "value": ["a", "b"] } </code></pre> <p>Where is the <code>value</code> coming from? </p> <p>If I put a <code>@XmlElementWrapper</code> over the arguments field, it gets even worse:</p> <pre class="lang-json prettyprint-override"><code>{ "method":"test", "arguments":"a""value":["b"] } </code></pre> <p>My JUnit <code>TestCase</code> looks like this:</p> <pre class="lang-java prettyprint-override"><code>import static org.junit.Assert.assertEquals; import java.io.StringWriter; import java.util.HashMap; import java.util.Map; import javax.xml.bind.*; import javax.xml.bind.annotation.*; import org.junit.Test; public class JsonRequestTest { @XmlRootElement @XmlAccessorType(XmlAccessType.FIELD) public static class Request { String method; @XmlAnyElement(lax=true) Object[] arguments; } // InvocationRequest @Test public void testObjectArray() throws JAXBException { System.setProperty(JAXBContext.class.getName(), "org.eclipse.persistence.jaxb.JAXBContextFactory"); Map&lt;String, Object&gt; props= new HashMap&lt;String, Object&gt;(); props.put("eclipselink.media-type", "application/json"); props.put("eclipselink.json.include-root", false); JAXBContext ctx = JAXBContext.newInstance(new Class&lt;?&gt;[]{Request.class},props); Marshaller m = ctx.createMarshaller(); StringWriter writer = new StringWriter(); Request req = new Request(); req.method="test"; req.arguments = new Object[]{"a","b"}; m.marshal(req, writer); assertEquals("{\"method\":\"test\", \"arguments\":[\"a\",\"b\"]}", writer.toString()); } } // class JsonRequestTest </code></pre>
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    1. COIn the case of string arguments, I was able to get, what I need, by adding @XmlElements(@XmlElement(name="arguments")) to the arguments. This does not work however, if I use non-string arguments, i.e. some annotated bean.
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