Enums where added to Java in its version 1.5 and it is straightforward to use the:
public enum ChannelStates
{
CONNECTED,
CONNECTING,
DISCONNECTED,
RECONNECTING
}
Since JavaScript is becoming more and more important, at least when you are building a pretty rich ui framework, like ADF Faces, you may run into the situation where you want the same in JavaScript. It isn’t really that hard at all. Take a look at the following JS/JSON object:
ChannelStates = {
CONNECTED : 0,
CONNECTING : 1,
DISCONNECTED : 2,
RECONNECTING : 3
};
That’s all you need. However, usually, you want this object, or “enum”, to be available as a global JS object, e.g:
...
ConnectionChannel.ChannelStates = {
CONNECTED : 0,
CONNECTING : 1,
DISCONNECTED : 2,
RECONNECTING : 3
};
...
ConnectionChannel.prototype.getChannelState = function()
...
This now did make the enum part of the “ConnectionChannel” class. The usage of this enum is simple too:
...
var myChannelObject = ...
if(channelObject.getChannelState() == ConnectionChannel.ChannelStates.CONNECTED)
{
// do some work here...
}
else
...
