A simple statically-typed way to access JSON Data from Java.
Let’s take data from Yahoo as an example. The data contains the most popular new album releases. Here's the first album:
{
"query": {
"count": 24,
"created": "2013-03-21T20:13:42Z",
"lang": "en-US",
"results": {
"Release": [
{
"UPC": "602527291567",
"explicit": "0",
"flags": "2",
"id": "218641405",
"label": "Streamline/Interscope/Kon Live",
"rating": "-1",
"releaseDate": "2009-11-23T08:00:00Z",
"releaseYear": "2009",
"rights": "160",
"title": "The Fame Monster",
"typeID": "2",
"url": "http://new.music.yahoo.com/lady-gaga/albums/fame-monster--218641405",
"Artist": {
"catzillaID": "0",
"flags": "115202",
"hotzillaID": "1810013384",
"id": "58959115",
"name": "Lady Gaga",
"rating": "-1",
"trackCount": "172",
"url": "http://new.music.yahoo.com/lady-gaga/",
"website": "http://www.ladygaga.com/"
},
"ItemInfo": {
"ChartPosition": {
"last": "1",
"this": "1"
}
}
},
....
}Jsonized makes use of Xtend's active annotations, which is a compile-time macros system. The @Jsonized annotation will generate Java classes with the respective accessor methods for the given JSON example.
@Jsonized('{
"query": {
"count": 24,
"created": "2013-03-21T20:13:42Z",
"lang": "en-US",
"results": {
"Release": [
{
"UPC": "602527291567",
"explicit": "0",
"flags": "2",
"id": "218641405",
"label": "Streamline/Interscope/Kon Live",
"rating": "-1",
"releaseDate": "2009-11-23T08:00:00Z",
"releaseYear": "2009",
"rights": "160",
"title": "The Fame Monster",
"typeID": "2",
"url": "http://new.music.yahoo.com/lady-gaga/albums/fame-monster--218641405",
"Artist": {
"catzillaID": "0",
"flags": "115202",
"hotzillaID": "1810013384",
"id": "58959115",
"name": "Lady Gaga",
"rating": "-1",
"trackCount": "172",
"url": "http://new.music.yahoo.com/lady-gaga/",
"website": "http://www.ladygaga.com/"
},
"ItemInfo": {
"ChartPosition": {
"last": "1",
"now": "1"
}
}
}]
}
}
}')
class MusicReleases {
// empty
}Now from Java (or Xtend) you can simply work with the Json Data in a statically typed way. And it's just a super thin layer so you have full access to the underlying JsonObject if you want to go more dynamic.
Have fun!
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