Hi,
Running into issue while deserializing a class with value of type Object.
Java class is as following.
public final class Message {
private final MessageHeader header;
private final Object body;
@JsonCreator
public <T> Message(@JsonProperty("header") MessageHeader header,
@JsonProperty("body") T body) {
this.header = header;
this.body = body;
}
public MessageHeader getHeader() {
return header;
}
public Object getBody() {
return body;
}
@JsonIgnore
public <T> T getBody(Class<T> objectType) {
if(objectType.isInstance(this.body)) {
return objectType.cast(this.body);
}
throw new Exception("Message body is not of type
"+objectType.toString());
}}
Using Jackson 2.8.4 for serializing and deserializing the object in JSON
format using a mapper enabled with DefaultTyping
(mapper.enableDefaultTyping()). Running into problems while trying to
retrieve the message body part using generic version of getBody method.
Getting object of type java.util.ArrayList instead of the actual object
type passed. Any suggestions on what is missing mapper configuration or any
other ?
Message.getBody is invoked as following.
DataSet data = getDataSet();Message message = new
Message(header,data);...DataSet data = message.getBody(DataSet.class);
JSON message is as following which when attempted to deserialize is giving
problem.
{
"header" : {
"hostId" : "XYZ",
"hostname" : "X-123456789",
"systemType" : "ABC"
},"
"body" : [ "com.foo.DataSet", {
"createTimestamp" : 1502859923155,
"records" : [ "java.util.ArrayList", [ {
"name" : "Running",
"timestamp" : 1502859923162,
"value" : true
}, {
"name" : "Command",
"timestamp" : 1502859923162,
"value" : false
} ] ]
} ]}
[1] -
https://stackoverflow.com/questions/45675200/json-deserialization-using-jackson-for-java-lang-object-returns-java-lang-arrayl
Regards
Vinu
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