I am getting an exception with jackson databind version 2.8.0 and later,
everything works fine with any version below 2.8.0.
Issue is, if I have a property name with an underscore and the letter after it
is NOT the same as the first letter, then things blow up.
For example I have a Person class which contains a Set<Person> which has the
name as "person_z" which fails.
But if I rename it to "person_p" it works.
public class Person {
@JsonProperty("name")
private String name;
@JsonProperty("person_z") // renaming this to person_p works
@JsonIgnoreProperties(value = {"person_z"}) // renaming this to person_p
works
private Set<Person> personZ;
}
public class TestJackson {
public static void main(String[] args) throws IOException {
String st =" [ {\n"
+ " \"name\": \"admin\",\n"
+ " \"person_z\": [" // renaming this to person_p works
+ " {"
+ " \"name\": \"admin\""
+ " }"
+ " ]"
+ " }]";
ObjectMapper mapper = new ObjectMapper();
mapper.readValue(st,
mapper.getTypeFactory().constructCollectionType(List.class, Person.class));
}
}
Exception in thread "main" com.fasterxml.jackson.databind.JsonMappingException:
No _valueDeserializer assigned
at [Source: [ {
"name": "admin",
"person_z": [ { "name": "admin" } ] }]; line: 3,
column: 41] (through reference chain:
java.util.ArrayList[0]->com.example.Person["person_z"]->java.util.HashSet[0]->com.example.Person["name"])
at
com.fasterxml.jackson.databind.JsonMappingException.from(JsonMappingException.java:261)
at
com.fasterxml.jackson.databind.DeserializationContext.reportMappingException(DeserializationContext.java:1233)
at
com.fasterxml.jackson.databind.deser.impl.FailingDeserializer.deserialize(FailingDeserializer.java:27)
at
com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:490)
at
com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:101)
at
com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:276)
at
com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:277)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:249)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:26)
at
com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:490)
at
com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:101)
at
com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:276)
at
com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:140)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:277)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:249)
at
com.fasterxml.jackson.databind.deser.std.CollectionDeserializer.deserialize(CollectionDeserializer.java:26)
at
com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3789)
at
com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2871)
at com.example.TestJackson.main(TestJackson.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
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