/**

• Usecase:

• A web service to get the list of channels available on a set-top box. The implementation of this web service is as follows,

•  <li> make a remote call to get the list of ordered channels available on a set-top box in JSON format
  

•  <li> insert an attribute "channel_number" to each element in the collection and set with the value of "channel" attribute
  

•  <li> return the channels list by preserving the order
  

• Approach:

• Using Jackson for JSON parsing. If Jackson is not required this could be replaced by

•  hand-written parser using StringTokenizer and other String utilities.
  

• Using Jackson treaming API as Pull parser to effectively nullify memory foot print.

•  Pull parsers iterate over input source with memory foot print of current curser.
  

• Writing output as json to channels_output.json
• Alternate approach for parsing:
• 1. Current parsing adopted is bit of hard-coded json structure. As JSON given is not exactly in object - array format i used this.
• Compiled on : JDK 1.8
• @author Dileep Kalidindi.

*/