Morphia Customer decode method not called

Error message and Stack overflow

play.exceptions.JavaExecutionException: java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to com.mongodb.DBObject
        at play.mvc.ActionInvoker.invoke(ActionInvoker.java:237)
        at Invocation.HTTP Request(Play!)
Caused by: java.lang.RuntimeException: java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to com.mongodb.DBObject
        at com.google.code.morphia.mapping.Mapper.fromDb(Mapper.java:487)
        at com.google.code.morphia.mapping.Mapper.fromDBObject(Mapper.java:267)
        at com.google.code.morphia.query.MorphiaIterator.convertItem(MorphiaIterator.java:66)
        at com.google.code.morphia.query.MorphiaIterator.processItem(MorphiaIterator.java:53)
        at com.google.code.morphia.query.MorphiaIterator.next(MorphiaIterator.java:48)
        at com.google.code.morphia.query.QueryImpl.get(QueryImpl.java:365)
        at play.modules.morphia.Model$MorphiaQuery.get(Model.java:1400)
        at controllers.Test.test4(Test.java:21)
        at play.mvc.ActionInvoker.invokeWithContinuation(ActionInvoker.java:557)
        at play.mvc.ActionInvoker.invoke(ActionInvoker.java:508)
        at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:484)
        at play.mvc.ActionInvoker.invokeControllerMethod(ActionInvoker.java:479)
        at play.mvc.ActionInvoker.invoke(ActionInvoker.java:161)
        ... 1 more
Caused by: java.lang.RuntimeException: java.lang.ClassCastException: java.lang.String cannot be cast to com.mongodb.DBObject
        at com.google.code.morphia.mapping.EmbeddedMapper.fromDBObject(EmbeddedMapper.java:146)
        at com.google.code.morphia.mapping.Mapper.readMappedField(Mapper.java:507)
        at com.google.code.morphia.mapping.Mapper.fromDb(Mapper.java:484)
        ... 13 more
Caused by: java.lang.ClassCastException: java.lang.String cannot be cast to com.mongodb.DBObject
        at com.google.code.morphia.mapping.EmbeddedMapper.fromDBObject(EmbeddedMapper.java:136)
        ... 15 more

MyModel.java

@Entity
@Converters({PeriodConverter.class})
public class MyModel {
    public Period period = Period.all;
}

Period.java

public enum Period {
    day("s"), week("w"), month("m"), all("a");

    private String shortName;

    private Period(){}

    private Period(String s) {
        shortName = s;
    }

    public String getShortName() {
        return shortName;
    }

    public String shortName() {
        return shortName;
    }

    public static Period parseStr(String s) {
        for (Period p: Period.values()) {
            if (p.name().equals(s)) return p;
            else if (p.getShortName().equals(s)) return p;
        }
        throw new IllegalArgumentException("No enum const Period." + s);
    }
}

PeriodConverter.java

    public class PeriodConverter extends TypeConverter {
        public PeriodConverter() {
            super(com.pixolut.pxtrack.prl.Period.class);
        }

        @Override
        public Object decode(Class targetClass, Object fromDBObject, MappedField optionalExtraInfo) throws MappingException {
            // This method never get called!
            return com.pixolut.pxtrack.prl.Period.parseStr((String) fromDBObject);
        }

        @Override
        public Object encode(Object value, MappedField optionalExtraInfo) {
            return ((com.pixolut.pxtrack.prl.Period)value).shortName();
        }
    }

Run into the same problem. Did you ever find a solution to the problem?

Me too :(

It's janky, but I was able to get it working when my TypeConverter implemented SimpleValueConverter (even though I wasn't doing a simple value conversion). Give it a go!