Hi All,
We are in a process of evaluating the libraries to process JSON schema
(read and write) and we found few libraries as listed below:
- Jackson [1]
- JSON.simple [2]
- Gson
Based on the findings when comparing the GSON and Jackson [3], it seems
Jackson has more complete support than Gson
- Streaming (Streaming API) reading, writing, for ultra-high performance
(or memory-limited) use cases
- Tree model (DOM-like access),can convert between various models (tree <->
java object <-> stream)
- Can use any constructors (or static factory methods), not just default
constructor
- Field and getter/setter access
- Interoperability: can also use JAXB annotations, has support/work-arounds
for common packages
- Support for deserializing polymorphic types (Jackson 1.5),can serialize
AND deserialize things like List correctly (with additional type
information)
When considering the JSON.simple[4], it is a simple Java library for JSON
processing, read and write JSON data and it is full compliance with json
specification. If we compare this with other two libraries [5], If we are
dealing with both small and large schema files,neither Jackson nor GSON
perform well across multiple files sizes as JSON.simple does. ( Jackson
support well for large files only)
If we consider the implementation for read JSON schema and generating the
schema, below things can be highlighted
- Jackson - We can use
an ObjectMapper(com.fasterxml.jackson.databind.ObjectMapper) object and
read the values of the fields in the schema (Tree Model) using
fieldNames(), isObject(), isArray() etc and also can use methods like
createArrayNode(), createObjectNode() in generating the JSON schema.
- JSON.Simple - We can use JSONObject (org.json.simple.JSONObject) and
JSONArray (org.json.simple.JSONArray) to read and write values to/from
JSON schema
AFAIU, implementation wise we can use either Jackson or JSON.simple and
when comparing the performance it seems both are better than GSON
But, when considering selecting the best library i feel JSON.simple would
be better since it has following features
-Full compliance with JSON specification and reliable
-Provides multiple functionalities such as encode, decode/parse and escape
JSON text while keeping the library lightweight
-Flexible, simple and easy to use by reusing Map and List interfaces
-Supports streaming output of JSON text
- High performance
- No dependency on external libraries
Shall we proceed with JSON.simple? WDYT?
[1] http://wiki.fasterxml.com/JacksonInFiveMinutes
[2] https://code.google.com/archive/p/json-simple/
[3] http://stackoverflow.com/questions/2378402/jackson-vs-gson
[4] https://code.google.com/archive/p/json-simple/
[5]
http://blog.takipi.com/the-ultimate-json-library-json-simple-vs-gson-vs-jackson-vs-json/
Thanks,
Sohani
Sohani Weerasinghe
Software Engineer
WSO2, Inc: http://wso2.com
Mobile : +94 716439774
Blog :http://christinetechtips.blogspot.com/
Twitter : https://twitter.com/sohanichristine
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