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POxmlElements with same name and different types
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  1. POxmlElements with same name and different types
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    copied!<p>) </p> <p>I have an xmlelement which can be from different Types. Independent of the type it has the same name. It can be an object or just a reference via URI to an existing object. I thought xmlElements could be the solution. Marshalling works fine but by unmarshalling it, it chooses everytime the last given class type.</p> <p>The Class Flower which contains the Element</p> <pre><code>@XmlRootElement(name = "Flower") @XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "", propOrder = { "id", "name", "refName", "description", "created", "updated", "color", "seed") public class Flower extends CommonElements{ private string color; @XmlElements({ @XmlElement(name="seed", type=Seed.class), @XmlElement(name="seed", type=Reference.class) }) public Object seed; } </code></pre> <p>The class seed which is one of the Types the element can contain</p> <pre><code>@XmlRootElement(name = "Seed") @XmlAccessorType(XmlAccessType.FIELD) @XmlType(propOrder = { "id", "name", "refName", "description", "created", "updated", "category", "country"}) public class Seed extends CommonElements{ protected String category = ""; protected String country = ""; } </code></pre> <p>And the other class which can be contained by the element </p> <pre><code>@XmlRootElement @XmlAccessorType(XmlAccessType.NONE) public class Reference { @XmlAttribute(name="href") protected URI href; } </code></pre> <p>In CommonElements are just some generic elements like id, refName, description etc.. The XML can look like</p> <pre><code>&lt;Flower&gt; &lt;id&gt;http://localhost/test/flowers/1&lt;/id&gt; &lt;refName&gt;redRose&lt;/refName&gt; &lt;description&gt;classical red rose &lt;/description&gt; &lt;color&gt;red&lt;/color&gt; &lt;seed href="http://localhost/test/seeds/1" /&gt; &lt;/Flower&gt; </code></pre> <p>Or like</p> <pre><code>&lt;Flower&gt; &lt;id&gt;http://localhost/test/flowers/1&lt;/id&gt; &lt;refName&gt;redRose&lt;/refName&gt; &lt;description&gt;classical red rose &lt;/description&gt; &lt;color&gt;red&lt;/color&gt; &lt;seed&gt; &lt;id&gt;http://localhost/test/seeds/1&lt;/id&gt; &lt;refName&gt;wildrose&lt;/refName&gt; &lt;description&gt;Special Seed for beautiful wild roses&lt;/description&gt; &lt;category&gt;wildrose&lt;/category&gt; &lt;country&gt;china&lt;/country&gt; &lt;/seed&gt; &lt;/Flower&gt; </code></pre> <p>I assumed that the different structure of the classes are enough for jaxb to distinguish the objects. I am afraid I have to use adapters but I hope someone has another great idea.</p> <p>I know there is one Topic similiar to mine. But the types in the topic looks alike so jaxb can't distinguish them. (<a href="https://stackoverflow.com/questions/5007516/jaxb-xmlelements-different-types-but-same-name">JAXB @XmlElements, different types but same name?</a>)</p> <p>Thanks and sorry for my bad english.</p> <p>Edit: Is there a way to add the type by marshalling, that jaxb knows exactly which type it is for unmarshalling? </p>
 

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