ig-json-parser
Fast JSON parser for java projects
Getting started
The easiest way to get started is to look at the unit tests or the demo.
Requirements for model classes
There should be a package-visible no-argument constructor for each of your model classes. The fields also need to be package-visible.
Each class that needs a serializer/deserializer generated should be
annotated with @JsonType. Each field that needs to be mapped to/from
JSON should be annotated with @JsonField. The @JsonField annotation
has one mandatory argument, which is the fieldname for the field in the
JSON.
The following is an example of a very simple model class:
@JsonType
class Dessert {
@JsonField(fieldName="type")
String type;
@JsonField(fieldName="rating")
float rating;
}
Supported data types
The following scalar types are supported:
- String
- boolean/Boolean
- int/Integer
- long/Long
- float/Float
- double/Double
If a json field is another dictionary, it can be represented by another
model class. That model class must also have the @JsonType annotation.
Lists of objects are supported either as Java Lists or Queues.
Advanced features
Postprocessing
TODO: Document this. See the documentation in common/src/main/java/com/instagram/common/json/annotation/JsonType.java in the meanwhile.
Customized parsing code
TODO: Document this. See the documentation in common/src/main/java/com/instagram/common/json/annotation/JsonField.java in the meanwhile.