pojo parse gson with invalid java names

Question

i\'m working with the youtube json from google-api-client :

{
    \"apiVersion\": \"2.0\",
    \"data\": {
        \"updated\": \"2011-01-05T13:48:33.146Z\",         


        

Answer 1

Just say it from my personal experience, @Key may not work on serialization/de-serialization when choosing the wrong Json parser.

(1) When you use Gson parser, like below :

GsonBuilder gsb = new GsonBuilder();
Gson gson = gsb.create();
OneDriveItem oneDriveItem = gson.fromJson(jasonData1, OneDriveItem.class);

@Key does not work, you should use @SerializedName to annotate the field name.

(2) When you use JsonFactory from the package com.google.api.client.json, like below :

 JacksonFactory jsonFactory=new JacksonFactory();

@Key should work.

Answer 2

If you're using the @Key annotation for your mapped fields, you just need to make use of a custom value that can be passed to this annotation. So choose a legal name for your field and map it as @Key("default"):

@Key("default")
private String defaultUrl;

Answer 3

I believe your answer lies in the JSON Field Naming Support:

Gson supports some pre-defined field naming policies to convert the standard Java field names (i.e. camel cased names starting with lower case --- "sampleFieldNameInJava") to a Json field name (i.e. sample_field_name_in_java or SampleFieldNameInJava).

See for instance the following example:

private class SomeObject {
  @SerializedName("custom_naming") private final String someField;
  private final String someOtherField;

  public SomeObject(String a, String b) {
    this.someField = a;
    this.someOtherField = b;
  }
}

So you should be able to define the field mapping to the default value like this:

@SerializedName("default")
private final String someOtherNameThanDefault;