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傑克遜scala模塊：序列化枚舉失敗

2013-04-08 32 views
1

有人可以解釋爲什麼這不起作用嗎？我與傑克遜一起使用Scala模組。傑克遜scala模塊：序列化枚舉失敗

我的依賴是"com.fasterxml.jackson.module" %% "jackson-module-scala" % "2.1.3"

我的串行是：

import org.bson.types.ObjectId 
import com.fasterxml.jackson.databind.module.SimpleModule 
import com.fasterxml.jackson.databind.ObjectMapper 
import com.fasterxml.jackson.module.scala.DefaultScalaModule 

object CustomSerializer { 

    val objectMapper = new ObjectMapper() 

    val module = new SimpleModule("CustomSerializer") 
    module.addSerializer(classOf[Throwable], new ThrowableSerializer) 
    module.addSerializer(classOf[ObjectId], new ObjectIdSerializer) 
    module.addDeserializer(classOf[ObjectId], new ObjectIdDeserializer) 
    val scalaModule = DefaultScalaModule 

    objectMapper.registerModule(scalaModule) 
    objectMapper.registerModule(module) 

    def serialize(obj: AnyRef): String = { 
    objectMapper.writeValueAsString(obj) 
    } 

}

沒有真正看中的，我只是斯卡拉模塊添加到默認的序列+一些串行MongoDB的類的ObjectId。

這裏是我的簡單的測試代碼：

@JsonIgnoreProperties(ignoreUnknown = true) 
case class Relationship(
         @Key("_id") id: ObjectId = new ObjectId, 
         fromUserId: ObjectId, 
         fromUserConfiguration: RelationshipConfiguration = new RelationshipConfiguration, 
         toUserId: ObjectId, 
         toUserConfiguration: RelationshipConfiguration = new RelationshipConfiguration, 
         status: RelationshipStatus.Value, 
         ) extends IdentifiableModel[Relationship] { 

    ... some methods here 
} 

    case class SimpleCaseClass(string: String) 
    case class SimpleCaseClassWithEnum(string: String,status: RelationshipStatus.Value) 

    println(
     CustomSerializer.serialize(SimpleCaseClass("someString")) 
    ) 
    println(
     CustomSerializer.serialize(SimpleCaseClassWithEnum("someString",RelationshipStatus.ACCEPTED)) 
    ) 

    println(
     CustomSerializer.serialize(
     Relationship(
      fromUserId = new ObjectId("510f9398ed5080cb1265c8c2"), 
      toUserId = new ObjectId("510f9398ed5080cb1265c8c2"), 
      status = RelationshipStatus.ACCEPTED 
     ) 
    ) 
    )

這將產生輸出：

{"string":"someString"} 
{"string":"someString","status":{"enumClass":"models.RelationshipStatus","value":"ACCEPTED"}} 
[21:35:58] ERROR application - 

! @6e03dp6pp - Internal server error, for (GET) [/me] -> 

play.api.UnexpectedException: Unexpected exception[RuntimeException: Cannot resolve type alias Value in models.RelationshipStatus] 
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$1.apply(ApplicationProvider.scala:142) ~[play_2.10.jar:2.1.0] 
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$1.apply(ApplicationProvider.scala:106) ~[play_2.10.jar:2.1.0] 
    at scala.Option.map(Option.scala:145) ~[scala-library.jar:na] 
    at play.core.ReloadableApplication$$anonfun$get$1.apply(ApplicationProvider.scala:106) ~[play_2.10.jar:2.1.0] 
    at play.core.ReloadableApplication$$anonfun$get$1.apply(ApplicationProvider.scala:104) ~[play_2.10.jar:2.1.0] 
    at scala.util.Either$RightProjection.flatMap(Either.scala:523) [scala-library.jar:na] 
    at play.core.ReloadableApplication.get(ApplicationProvider.scala:104) ~[play_2.10.jar:2.1.0] 
    at play.core.server.Server$class.sendHandler$1(Server.scala:56) [play_2.10.jar:2.1.0] 
    at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:88) [play_2.10.jar:2.1.0] 
    at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:87) [play_2.10.jar:2.1.0] 
    at scala.util.Either$RightProjection.flatMap(Either.scala:523) [scala-library.jar:na] 
    at play.core.server.Server$class.getHandlerFor(Server.scala:87) [play_2.10.jar:2.1.0] 
    at play.core.server.NettyServer.getHandlerFor(NettyServer.scala:34) [play_2.10.jar:2.1.0] 
    at play.core.server.netty.PlayDefaultUpstreamHandler.messageReceived(PlayDefaultUpstreamHandler.scala:103) [play_2.10.jar:2.1.0] 
    at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:565) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:793) [netty.jar:na] 
    at org.jboss.netty.handler.codec.http.HttpContentDecoder.messageReceived(HttpContentDecoder.java:104) [netty.jar:na] 
    at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:565) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:793) [netty.jar:na] 
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296) [netty.jar:na] 
    at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:455) [netty.jar:na] 
    at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:538) [netty.jar:na] 
    at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:437) [netty.jar:na] 
    at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:75) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:565) [netty.jar:na] 
    at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560) [netty.jar:na] 
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268) [netty.jar:na] 
    at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255) [netty.jar:na] 
    at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:84) [netty.jar:na] 
    at org.jboss.netty.channel.socket.nio.AbstractNioWorker.processSelectedKeys(AbstractNioWorker.java:472) [netty.jar:na] 
    at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:333) [netty.jar:na] 
    at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:35) [netty.jar:na] 
    at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:102) [netty.jar:na] 
    at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42) [netty.jar:na] 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [na:1.7.0_01] 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [na:1.7.0_01] 
    at java.lang.Thread.run(Thread.java:722) [na:1.7.0_01] 
Caused by: java.lang.RuntimeException: Cannot resolve type alias Value in models.RelationshipStatus 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler.resolveTypeAlias(ScalaTypeCompiler.scala:202) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler.getTypeDecl$1(ScalaTypeCompiler.scala:159) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler.resolveScalaType(ScalaTypeCompiler.scala:167) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$3.apply(ScalaTypeCompiler.scala:146) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$3.apply(ScalaTypeCompiler.scala:145) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) ~[scala-library.jar:na] 
    at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.AbstractTraversable.map(Traversable.scala:105) ~[scala-library.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler.compile(ScalaTypeCompiler.scala:145) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$1$$anonfun$apply$2.apply(ScalaTypeCompiler.scala:51) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$1$$anonfun$apply$2.apply(ScalaTypeCompiler.scala:48) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.Option$WithFilter.map(Option.scala:206) ~[scala-library.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$1.apply(ScalaTypeCompiler.scala:48) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$$anonfun$1.apply(ScalaTypeCompiler.scala:47) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.Option.flatMap(Option.scala:170) ~[scala-library.jar:na] 
    at org.scalastuff.scalabeans.sig.ScalaTypeCompiler$.classInfoOf(ScalaTypeCompiler.scala:47) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.PropertyDescriptor$$anonfun$4.apply(PropertyDescriptor.scala:225) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at org.scalastuff.scalabeans.PropertyDescriptor$$anonfun$4.apply(PropertyDescriptor.scala:224) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.Option.flatMap(Option.scala:170) ~[scala-library.jar:na] 
    at org.scalastuff.scalabeans.PropertyDescriptor$.apply(PropertyDescriptor.scala:224) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$.com$fasterxml$jackson$module$scala$util$SmarterBeanIntrospector$$createPropertyDescriptor$1(ScalaBeansUtil.scala:68) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$$anonfun$5$$anonfun$apply$5.apply(ScalaBeansUtil.scala:103) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$$anonfun$5$$anonfun$apply$5.apply(ScalaBeansUtil.scala:94) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33) ~[scala-library.jar:na] 
    at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:105) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:244) ~[scala-library.jar:na] 
    at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:105) ~[scala-library.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$$anonfun$5.apply(ScalaBeansUtil.scala:94) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$$anonfun$5.apply(ScalaBeansUtil.scala:93) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251) ~[scala-library.jar:na] 
    at scala.collection.immutable.List.foreach(List.scala:309) ~[scala-library.jar:na] 
    at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251) ~[scala-library.jar:na] 
    at scala.collection.AbstractTraversable.flatMap(Traversable.scala:105) ~[scala-library.jar:na] 
    at com.fasterxml.jackson.module.scala.util.SmarterBeanIntrospector$.apply(ScalaBeansUtil.scala:93) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.util.ScalaBeansUtil$.propertiesOf(ScalaBeansUtil.scala:166) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.deser.CaseClassAnnotationIntrospector$.findConstructorParamName(CaseClassDeserializerModule.scala:51) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.module.scala.deser.CaseClassAnnotationIntrospector$.findDeserializationName(CaseClassDeserializerModule.scala:41) ~[jackson-module-scala_2.10-2.1.3.jar:na] 
    at com.fasterxml.jackson.databind.AnnotationIntrospector.findNameForDeserialization(AnnotationIntrospector.java:915) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.AnnotationIntrospectorPair.findNameForDeserialization(AnnotationIntrospectorPair.java:606) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector._addCreators(POJOPropertiesCollector.java:405) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.POJOPropertiesCollector.collect(POJOPropertiesCollector.java:233) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.BasicClassIntrospector.collectProperties(BasicClassIntrospector.java:142) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.BasicClassIntrospector.forSerialization(BasicClassIntrospector.java:68) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.introspect.BasicClassIntrospector.forSerialization(BasicClassIntrospector.java:11) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.SerializationConfig.introspect(SerializationConfig.java:490) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.ser.BeanSerializerFactory.createSerializer(BeanSerializerFactory.java:131) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.ser.SerializerFactory.createSerializer(SerializerFactory.java:53) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.SerializerProvider._createUntypedSerializer(SerializerProvider.java:935) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.SerializerProvider._createAndCacheUntypedSerializer(SerializerProvider.java:892) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.SerializerProvider.findValueSerializer(SerializerProvider.java:429) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.SerializerProvider.findTypedValueSerializer(SerializerProvider.java:520) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:99) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.ObjectMapper._configAndWriteValue(ObjectMapper.java:2627) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at com.fasterxml.jackson.databind.ObjectMapper.writeValueAsString(ObjectMapper.java:2119) ~[jackson-databind-2.1.2.jar:2.1.2] 
    at utils.CustomSerializer$.serialize(CustomSerializer.scala:24) ~[na:na] 
    at Global$.onStart(Global.scala:36) ~[na:na] 
    at play.api.GlobalPlugin.onStart(GlobalSettings.scala:175) ~[play_2.10.jar:2.1.0] 
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:63) ~[play_2.10.jar:2.1.0] 
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:63) ~[play_2.10.jar:2.1.0] 
    at scala.collection.immutable.List.foreach(List.scala:309) ~[scala-library.jar:na] 
    at play.api.Play$$anonfun$start$1.apply$mcV$sp(Play.scala:63) ~[play_2.10.jar:2.1.0] 
    at play.api.Play$$anonfun$start$1.apply(Play.scala:63) ~[play_2.10.jar:2.1.0] 
    at play.api.Play$$anonfun$start$1.apply(Play.scala:63) ~[play_2.10.jar:2.1.0] 
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18) ~[play_2.10.jar:2.1.0] 
    at play.api.Play$.start(Play.scala:62) ~[play_2.10.jar:2.1.0] 
    at play.core.ReloadableApplication$$anonfun$get$1$$anonfun$1.apply(ApplicationProvider.scala:133) ~[play_2.10.jar:2.1.0] 
    ... 38 common frames omitted

因此，只有第三序列化失敗。

我的枚舉是基本的：

object RelationshipStatus extends Enumeration { 
    val PENDING = Value("PENDING") 
    val ACCEPTED = Value("ACCEPTED") 
    val REJECTED = Value("REJECTED") 
    val IGNORED = Value("IGNORED") 
}

任何想法??? 我沒有在枚舉中定義任何類型的別名，那麼爲什麼會出現這個錯誤？爲什麼在第三次嘗試而不是第二次有相同的枚舉？

順便說一句，是有可能有：

{"string":"someString","status":"ACCEPTED"}

相反的：

{"string":"someString","status":{"enumClass":"models.RelationshipStatus","value":"ACCEPTED"}}

來源

2013-04-08 Sebastien Lorber

+0

這可能是固定在每晚構建：https://github.com/FasterXML/jackson-module-scala/wiki/Enumerations – 2013-04-13 03:19:37

回答

1

你有兩個不同的問題：

  1. 爲什麼這個代碼拋出例外？

    我不知道，除了說傑克遜Scala模塊的2.1系列所依賴的庫，scalabeans，看起來像Enumerations有問題，可能特別是在Scala 2.10下。我將跟蹤related github issue中的這個缺陷。

  2. 枚舉在序列化時是否需要傳遞它們的類型？

    還沒有。詳情爲什麼在relevant github issue;要點是因爲枚舉的值類型只是類型別名而不是類型，所以每個枚舉派生類的每個值在Java擦除下都具有相同的運行時類型。

來源

2013-04-10 22:20:46

+0

問題是由固定升級2.2.0感謝 – 2013-04-14 17:01:14

+1

HTTPS：/ /github.com/FasterXML/jackson-module-scala/wiki/Enumerations – 2013-06-03 16:19:52

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