Bug in polymorphic deserialization with @JsonCreator, @JsonAnySetter, JsonTypeInfo.As.EXTERNAL_PROPERTY #3045
Description
I'm using Jackson for a while in simply way. I've just tried some more difficult tricks and I found a strange behaviour.
When I've combined JsonCreator annotation with a JsonTypeInfo.As.EXTERNAL_PROPERTY resolver, then the result is not the same than if I had not put the @JsonCreator.
My example is simple : I want to deserialize this String :
{ "time":345,
"type":"track",
"data":{"data-internal":"toto"}
}
My classes are
public static class MyData {
@JsonAnySetter
public HashMap data = new HashMap();
@Override
public String toString() {
StringBuilder buf = new StringBuilder();
buf.append("[");
Set<Entry> entrySet = data.entrySet();
for (Entry e : entrySet) {
buf.append("[").append(e.getKey()).append("=").append(e.getValue()).append("]");
}
buf.append("]");
return buf.toString();
}
}
public static class MyJson {
private long time;
private String type;
private Object data;
public MyJson() {
}
public long getTime() {
return time;
}
public void setTime(long time) {
this.time = time;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Object getData() {
return data;
}
@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type")
@JsonTypeIdResolver(ChildBaseByParentTypeResolver.class)
public void setData(Object data) {
this.data = data;
}
}
public static class MyJson2 {
private final long time;
private String type;
private Object data;
@JsonCreator
public MyJson2(@JsonProperty("time") long t) {
System.out.println("MyJson2<init>");
time = t;
}
public long getTime() {
return time;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Object getData() {
return data;
}
@JsonTypeInfo(use = JsonTypeInfo.Id.CLASS, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type")
@JsonTypeIdResolver(ChildBaseByParentTypeResolver.class)
public void setData(Object data) {
this.data = data;
}
}
When I launch the the two deserialization, I have the next results
content = {"time":345,"type":"track","data":{"data-internal":"toto"}}
MyJson result
time=345
type=track
data=class com.navalgroup.sdms.ac.model.impl.test.TestDeserialisation$MyData ; [[data-internal=toto]]
MyJson2 result
time=345
type=null
data=null
When I've got the sources and I've tried to debug the unexpected MyJson2 result, I've lost myself in BeanDeserializer.deserializeUsingPropertyBasedWithExternalTypeId. The Json datas seem to be put in TokenBuffer which doesn't seem used.
I attached a fully executed Java File with my test classes.
TestDeserialisation.zip
Thanks for your attention