CODEWITHSUNDEEP
javagoogle-app-enginejodatimeobjectifygoogle-cloud-datastore
pgiecek
pgiecek

Reputation: 8210

Does Objectify support Joda-Time Interval class?

We use Objectify 5 to access Google Cloud Datastore. We have an entity with a property of type Interval from Joda-Time library. When we try to save such an entity, we get the error below. It seems that Objectify has problem with Chronology and its subclasses.

com.googlecode.objectify.SaveException: Error saving MyEntity(null): Class 'class org.joda.time.chrono.ISOChronology' is not a registered @Subclass
    at com.googlecode.objectify.impl.EntityMetadata.save(EntityMetadata.java:95)
    at com.googlecode.objectify.impl.WriteEngine.save(WriteEngine.java:75)
    at com.googlecode.objectify.impl.SaverImpl.entities(SaverImpl.java:60)
    at com.googlecode.objectify.impl.SaverImpl.entity(SaverImpl.java:35)
...

We registered Joda-Time translators in Objectify along with our entities as follows.

...

// Joda-Time translators
JodaTimeTranslators.add(ObjectifyService.factory());

// persistent entities
ObjectifyService.register(MyEntity.class);

...

When we use DateTime instead of Interval, it works perfectly OK. Did we miss something? Does Objectify support Joda-Time Interval out-of-the-box?

Upvotes: 2

Views: 745

Answers (1)

Meno Hochschild
Meno Hochschild

Reputation: 44061

If you look at the source code, obviously not. Supported types are:

DateTimeZone
LocalDate
LocalDateTime
DateTime (via ReadableInstant)

Maybe you can learn from the source code and write your own translator/adapter, see for example the source code of LocalDateTranslatorFactory It does not seem to be so difficult. But you have probably to register your own adapter anyway.

Upvotes: 3

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