+1 very nicely thought thru! You may also want to review how ADB serializes Java onto the wire without going to an in-memory XML form first .. you should be able to do something similar for JSON.
Sanjiva. On Mon, Dec 26, 2011 at 11:19 AM, Amila Suriarachchi < amilasuriarach...@gmail.com> wrote: > looks good. > > thanks, > Amila. > > > On Sun, Dec 25, 2011 at 7:39 PM, Shameera Rathnayaka < > shameerai...@gmail.com> wrote: > >> Hi devs, >> >> I hope to select an axis2 related project to do in 2012 GSOC. Therefore i >> did some basic research about Axis2 and found that Current Json support in >> Axis2 can be improved using a rich library such as google-gson to use >> normal JSON object to communicate with java services without converting it >> to Badgerfish. >> >> Here is my proposal in brief. >> >> There are two ways that xml string can be converted into JSON string, >> Badgerfish and Mapped . Current Axis2 with JSON module completely supports >> Badgerfish convention[1] while partialy supports Mapped convention[1] as >> Mapped formatted JSON with namespaces are not supported in Axis2. Therefore >> if the client side java-script code needs to talk with java service which >> is deployed in Axis2, it should be sent as Badgerfish convention. It is >> cumbersome to generate Badgerfish convention of JSON string again and again >> to call services if there is no xml representation string in client side. >> >> If java script client can send JSON object to relevant java service in >> Axis2, defining service and operation in request url, without doing any >> modifications to JSON objects, then it would be very helpful for >> Java-Script users at client side. >> >> Here i propose a solution to implement this with some limitations by >> using google-gson [2] <http://code.google.com/p/google-gson/> library >> which is a rich library to convert JSON string to Java object and >> vice-versa and also it is released under Apache license. Using this library >> we can improve JSON support in Axis2 to overcome above problem. Following >> are some advantages of using gson to convert JSON to Java object and >> vice-versa. >> >> - Provide simple toJson() and fromJson() methods to convert Java >> objects to JSON and vice-versa >> - Allow pre-existing unmodifiable objects to be converted to and from >> JSON >> - Extensive support of Java Generics >> - Allow custom representations for objects >> - Support arbitrarily complex objects (with deep inheritance >> hierarchies and extensive use of generic types) >> >> As i mentioned there are several limitations because we are not using >> namespace mapping. As an example if wsdl has two methods with same name but >> different namespace then this method will fail,But there are ways we can >> find a solution to fix this to some extent. >> >> Also i have some basic idea about how to implement this improvement, as >> follows. Here i have assumed that service name and operation name can be >> read from request URL. Then incoming message can be dispatched to correct >> operation. >> >> >> 1. write a jsonMessagebuilder to read incoming json string under specific >> content type. >> >> 2. store json string without doing any process untill it reaches >> JsonMessageReceiver. JsonMessageReceiver is a new Message Receiver which >> use gson to convert json to java objects, call relevant operation and get >> result. >> >> >> 3. write a jsonMessageFormatter to write output stream according to >> content type. >> >> >> I would like to know that whether this is a good idea and will it be >> allright to do this as GSOC project. >> >> [1]http://wso2.org/library/768 <http://wso2.org/library/768> >> [2]http://code.google.com/p/google-gson/<http://code.google.com/p/google-gson/> >> >> Thanks >> Shameera. >> >> -- >> Shameera Rathnayaka >> Undergraduate >> Department of Computer Science and Engineering >> University of Moratuwa. >> Sri Lanka. >> >> Blog : http://shameerarathnayaka.blogspot.com/ >> >> > > > -- > Amila Suriarachchi > WSO2 Inc. > blog: http://amilachinthaka.blogspot.com/ > -- Sanjiva Weerawarana, Ph.D. Founder, Director & Chief Scientist; Lanka Software Foundation; http://www.opensource.lk/ Founder, Chairman & CEO; WSO2; http://wso2.com/ Founder & Director; Thinkcube Systems; http://www.thinkcube.com/ Member; Apache Software Foundation; http://www.apache.org/ Visiting Lecturer; University of Moratuwa; http://www.cse.mrt.ac.lk/ Blog: http://sanjiva.weerawarana.org/
