rwt.remote.MessageWriter.js Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2012 EclipseSource and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* EclipseSource - initial API and implementation
******************************************************************************/
namespace( "rwt.remote" );
rwt.remote.MessageWriter = function() {
this._head = {};
this._operations = [];
this._currentSetOperation = null;
this._disposed = false;
};
rwt.remote.MessageWriter.prototype = {
dispose : function() {
this._operations = null;
this._head = null;
this._disposed = true;
},
hasOperations : function() {
return this._operations.length > 0;
},
createMessage : function() {
if( this._disposed ) {
throw new Error( "Protocol message writer already disposed!" );
}
var message = {
"head" : this._head,
"operations" : this._operations
};
return JSON.stringify( message );
},
appendHead : function( property, value ) {
this._head[ property ] = value;
},
appendSet : function( targetId, property, value ) {
var properties = this._getPropertiesObjectFor( targetId );
properties[ property ] = value;
},
appendNotify : function( targetId, eventName, properties ) {
this._currentSetOperation = null;
this._operations.push( [ "notify", targetId, eventName, properties ] );
},
appendCall : function( targetId, methodName, properties ) {
this._currentSetOperation = null;
this._operations.push( [ "call", targetId, methodName, properties ] );
},
_getPropertiesObjectFor : function( targetId ) {
if( this._currentSetOperation === null || this._currentSetOperation[ 1 ] !== targetId ) {
this._currentSetOperation = [ "set", targetId, {} ];
this._operations.push( this._currentSetOperation );
}
return this._currentSetOperation[ 2 ];
}
};