Create RESTful Applications - JavaFX: Developing Rich Internet Applications - page 276

Note that because some fields differ in their value types (i.e., String , Number ,
and Integer ), Java classes such as Double and Integer are used to get the
proper values from the JSON text.

Listing 10.10 The Weather JSON Data Parser

var weatherInput: InputStream;
var weatherParser = PullParser {
documentType: PullParser.JSON;
input: bind weatherInput
onEvent: function(event: Event) {
// Parse the JSON Weather data and
// populate the Weather object
if(event.type == PullParser.END_VALUE) {
if(event.name == "clouds") {
weather.clouds = event.text;
}else if (event.name == "stationName") {
weather.station = event.text;
}else if (event.name == "windDirection") {
weather.windDirection = event.integerValue;
}else if (event.name == "windSpeed") {
weather.windSpeed = Double.valueOf(event.text);
}else if (event.name == "temperature") {
weather.temperature = Double.valueOf(event.text);
}else if (event.name == "dewPoint") {
weather.dewPoint = Double.valueOf(event.text);
}else if (event.name == "humidity") {
weather.humidity = event.integerValue;
}else if (event.name == "seaLevelPressure") {
weather.seaLevelPressure = event.numberValue;
} else if (event.name == "observation") {
weather.observation = event.text;
}
}
}
}

As with the request to Yahoo! for the location data, since weatherParser 's
member variable, input , is bound to the weatherInput variable, this code is
invoked when the input stream is updated and parse is called. This is triggered
when the location data is completely received. When all of the weather data is
received, and the Weather class' member variables have been set, the JavaFX
Text components that are bound to them are automatically updated. This completes
the weather widget's request, update, and display processes. When compared to
implementing the same functionality with plain Java code, the power of JavaFX
object binding greatly simplifies the entire process.