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  1. Java Driver
  2. JAVA-4578

Java driver cannot handle Deeper Polymorphic trees

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    • Type: Icon: Improvement Improvement
    • Resolution: Unresolved
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 4.3.4
    • Component/s: BSON, Codecs, POJO
    • Labels:
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      1. What would you like to communicate to the user about this feature?
      2. Would you like the user to see examples of the syntax and/or executable code and its output?
      3. Which versions of the driver/connector does this apply to?

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      1. What would you like to communicate to the user about this feature? 2. Would you like the user to see examples of the syntax and/or executable code and its output? 3. Which versions of the driver/connector does this apply to?

      The Pojo codec is limited in handling multiple level generic types that are passed through the class heirarchy.

      Take the following classes:

      abstract class GenericBaseModel<A, B, C> {

    private A alpha;
    private B bravo;
    private C charlie;
   
   // ... getters & setters
}

public abstract class GenericPassThroughModel<A, B, C> extends GenericBaseModel<C, B, A> {

}

public final class GenericPassThroughModelImpl extends GenericPassThroughModel<List<String>, Integer, String> {

}

      The concrete types of GenericPassThroughModelImpl are lost due to the PojoCodecs type detection.

      See first comment for the previous description.

            Assignee:
            ross@mongodb.com Ross Lawley
            Reporter:
            contact@gjstewart.net Greg Stewart
            Votes:
            1 Vote for this issue
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            5 Start watching this issue

              Created:
              Updated: