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PODatanucleus JDO Mongodb - Child of abstract in map value not persisted
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  1. PODatanucleus JDO Mongodb - Child of abstract in map value not persisted
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    copied!<p>I am using Datanucleus/JDO to persist objects in a MongoDB DB. I try to persist an object containing a Map, which value type is an abstract class.</p> <p>When I try to persist an instance of that object, fields of the abstract class are persisted, but not those of the child class.</p> <p>Below is some code as an example.</p> <p><strong>Zoo.java</strong></p> <pre><code> @PersistenceCapable public class Zoo { @Persistent private String fieldZoo; @Persistent private Map&lt;String, Animal&gt; mapStringAnimal; // etc... basic constructor... } </code></pre> <p><strong>Animal.java</strong></p> <pre><code> @PersistenceCapable(embeddedOnly = "true") public abstract class Animal { @Persistent private String fieldAnimal; } </code></pre> <p><strong>Dog.java</strong></p> <pre><code> @PersistenceCapable(embeddedOnly = "true") public class Dog extends Animal { @Persistent private String fieldDog; } </code></pre> <p><strong>Test.java</strong></p> <pre><code> public static void main(String[] args) { Map&lt;String, Animal&gt; mapStringAnimal = new HashMap&lt;String, Animal&gt;(); Dog dog = new Dog("valueFieldAnimal", "valueFieldDog"); mapStringAnimal.put("dogKey", dog); Zoo zoo = new Zoo("valueFieldZoo", mapStringAnimal); Properties properties = new Properties(); properties.setProperty("javax.jdo.PersistenceManagerFactoryClass", "org.datanucleus.api.jdo.JDOPersistenceManagerFactory"); properties.setProperty("javax.jdo.option.ConnectionURL", "mongodb:/dbtest"); properties.setProperty("javax.jdo.option.Mapping", "mongodb"); properties.setProperty("datanucleus.autoCreateSchema", "true"); PersistenceManagerFactory pmf = JDOHelper.getPersistenceManagerFactory(properties); PersistenceManager pm = pmf.getPersistenceManager(); pm.makePersistent(zoo); pm.close(); } </code></pre> <p>And when I look at MongoDB:</p> <pre><code> &gt; db.Zoo.find().pretty(); { "_id" : ObjectId("50d2f5f7e4b0cae285990b2d"), "fieldZoo" : "valueFieldZoo", "mapStringAnimal" : [ { "key" : "dogKey", "value" : { "fieldAnimal" : "valueFieldAnimal" } } ] } </code></pre>
 

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