大气没有绑定发布参数到正确的子类

我使用配置使用servlet的气氛运动衫，在我的大气后处理程序我收到不同类型命令的抽象对象，基于类类型我正在重定向到工人。大气没有绑定发布参数到正确的子类

我有一个抽象类，指挥和我的不同的指令扩展从中

开始
继续
结束

在我想路由到不同的工人

后

@POST 
def incoming(@PathParam("topic") topic: String, cmd: Command) { 
    cmd.getCmdType match { 
    case "Start" => 
    cmd.asInstanceOf[Start] 
    // 
    case "Continue" => 
    cmd.asInstanceOf[Continue] 
    case "End" => 
    cmd.asInstanceOf[End] 
}

Command.java

@XmlRoot 
@JsonTypeInfo(
    use = JsonTypeInfo.Id.NAME, 
    include = JsonTypeInfo.As.WRAPPER_OBJECT, 
    property = "type") 
@JsonSubTypes({ 
    @Type(value = Start.class, name = "Start"), 
    @Type(value = Continue.class, name = "Continue"), 
    @Type(value = End.class, name = "End")}) 
public abstract class Command

我配置的球衣

<init-param> 
    <param-name>com.sun.jersey.config.property.packages</param-name> 
    <param-value>com.mypackage</param-value> 
    </init-param> 
    <init-param> 
    <param-name>org.atmosphere.websocket.messageContentType</param-name> 
    <param-value>application/json</param-value> 
    </init-param>

但是，当我试图推到插座

var msgJson = {user: userId, eventCode: event, type: "Start"}; 
    var msg = JSON.stringify(msgJson); 
    subSocket.push(msg);

诉说说法不知道如何实例化一个抽象类。所以它忽略了我的亚型注释

Caused by: javax.xml.bind.UnmarshalException: null 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.handleStreamException(UnmarshallerImpl.java:431) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:368) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:345) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalJAXBElementFromJSON(BaseJSONUnmarshaller.java:111) ~[jersey-json-1.14.jar:1.14] 
    at com.sun.jersey.json.impl.BaseJSONUnmarshaller.unmarshalFromJSON(BaseJSONUnmarshaller.java:100) ~[jersey-json-1.14.jar:1.14] 
    at com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider.readFrom(JSONRootElementProvider.java:129) ~[jersey-json-1.14.jar:1.14] 
    at com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider.readFrom(AbstractRootElementProvider.java:111) ~[jersey-core-1.14.jar:1.14] 
    ... 41 common frames omitted 
Caused by: com.sun.istack.SAXParseException2: Unable to create an instance of mypackage.Command 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.handleEvent(UnmarshallingContext.java:647) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.Loader.reportError(Loader.java:258) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:614) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.StructureLoader.startElement(StructureLoader.java:185) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.XsiTypeLoader.startElement(XsiTypeLoader.java:80) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.ProxyLoader.startElement(ProxyLoader.java:60) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext._startElement(UnmarshallingContext.java:486) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.startElement(UnmarshallingContext.java:464) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.InterningXmlVisitor.startElement(InterningXmlVisitor.java:75) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.handleStartElement(StAXStreamConnector.java:247) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.StAXStreamConnector.bridge(StAXStreamConnector.java:181) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:366) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    ... 46 common frames omitted 
Caused by: javax.xml.bind.UnmarshalException: Unable to create an instance of mypackage.AbstractCommand 
    ... 58 common frames omitted 
Caused by: java.lang.InstantiationException: null 
    at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:48) ~[na:1.7.0_15] 
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525) ~[na:1.7.0_15] 
    at com.sun.xml.bind.v2.ClassFactory.create0(ClassFactory.java:122) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.ClassBeanInfoImpl.createInstance(ClassBeanInfoImpl.java:269) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    at com.sun.xml.bind.v2.runtime.unmarshaller.UnmarshallingContext.createInstance(UnmarshallingContext.java:608) ~[jaxb-impl-2.2.3-1.jar:2.2.3] 
    ... 55 common frames omitted

来源

2013-07-15 Luis Ramirez-Monterosa

原来，使用JAXB和杰克逊混淆了球衣。混乱的东西，无法使用@XmlAlsoSee等工作。我找到了一种方法只用杰克逊注释和它的作品

删除JAXB注释

@JsonTypeInfo(
    use = JsonTypeInfo.Id.NAME, 
    include = JsonTypeInfo.As.WRAPPER_OBJECT, 
    property = "type") 
@JsonSubTypes({ 
    @Type(value = Start.class, name = "Start"), 
    @Type(value = Continue.class, name = "Continue"), 
    @Type(value = End.class, name = "End")}) 
public abstract class Command

添加额外的参数在web.xml中Servlet这告诉只能使用杰克逊和工程就像一个魅力

<init-param> 
    <param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name> 
    <param-value>true</param-value> 
    </init-param>

来源

2013-07-17 13:32:20

大气没有绑定发布参数到正确的子类

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