/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.google.gwt.websockets.client;
import com.google.gwt.core.client.JavaScriptObject;
public class WebSocket {
private final static class WebSocketImpl extends JavaScriptObject {
public static native WebSocketImpl create(WebSocket client, String server)
/*-{
var ws = new WebSocket(server);
ws.onopen = $entry(function() {
client.@com.google.gwt.websockets.client.WebSocket::onOpen()();
});
ws.onmessage = $entry(function(response) {
client.@com.google.gwt.websockets.client.WebSocket::onMessage(Ljava/lang/String;)(response.data);
});
ws.onclose = $entry(function() {
client.@com.google.gwt.websockets.client.WebSocket::onClose()();
});
return ws;
}-*/;
public static native boolean isSupported() /*-{return !!window.WebSocket;}-*/;
protected WebSocketImpl() {
}
public native void close() /*-{this.close();}-*/;
public native void send(String data) /*-{this.send(data);}-*/;
}
private final WebSocketCallback callback;
private WebSocketImpl webSocket;
public WebSocket(WebSocketCallback callback) {
this.callback = callback;
}
public void close() {
if (webSocket == null) {
throw new IllegalStateException("Not connected");
}
webSocket.close();
webSocket = null;
}
public void connect(String server) {
if (!WebSocketImpl.isSupported()) {
throw new RuntimeException("No WebSocket support");
}
webSocket = WebSocketImpl.create(this, server);
}
public void send(String data) {
if (webSocket == null) {
throw new IllegalStateException("Not connected");
}
webSocket.send(data);
}
@SuppressWarnings("unused")
private void onClose() {
callback.onDisconnect();
}
@SuppressWarnings("unused")
private void onMessage(String message) {
callback.onMessage(message);
}
@SuppressWarnings("unused")
private void onOpen() {
callback.onConnect();
}
}