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toJson() fails when trying to serialize an object of DoublyLinkedList<Record>

See original GitHub issue

I have a DoublyLinkedList<Record> object I want to jsonify with Gson, but when doing so I get this common infinite loop error even when I have done everything by the books:

at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245)
    at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245)

Record.java

class Record {

private String objectName;
private Object object;

Record(String objectName, Object object) {
    this.objectName = objectName;
    this.object = object;
}

Object getObject() {
    return object;
}
String getObjectName() {
    return objectName;
  }
}

Gson Deserializing:

  Type classType = new TypeToken<DoublyLinkedList<Record>>() {}.getType();
  DoublyLinkedList<Record> linkedList = new Gson().fromJson(json, classType);

Gson Serializing:

  Type classType = new TypeToken<DoublyLinkedList<Record>>() {}.getType();
  String json = gson.toJson(list,classType);

Issue Analytics

State:
Created 5 years ago
Comments:10 (4 by maintainers)

Top GitHub Comments

2reactions

JakeWhartoncommented, Nov 12, 2018

I can’t tell if you have a really deeply nested tree or a cyclic reference (or both). Can you provide an executable sample that demonstrates the problem?

0reactions

Muddzcommented, Nov 29, 2018

@JakeWharton Yes. Thank you for your time.

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