wp/nwyj/.svn/pristine/3e/3ea08a9bef18dd7e2bf8a02a3529051fbc5fe162.svn-base

if (!dojo._hasResource["dojox.wire.ml.Invocation"]) { // _hasResource checks
														// added by build. Do
														// not use _hasResource
														// directly in your
														// code.
	dojo._hasResource["dojox.wire.ml.Invocation"] = true;
	dojo.provide("dojox.wire.ml.Invocation");

	dojo.require("dojox.wire.ml.Action");

	dojo.declare("dojox.wire.ml.Invocation", dojox.wire.ml.Action, {
		// summary:
		// A widget to invoke a method or publish a topic
		// description:
		// This widget represents a controller task to invoke a method or
		// publish a topic when an event (a function) or a topic is issued.
		// object:
		// A scope of a method to invoke
		// method:
		// A name of a method to invoke
		// topic:
		// A name of a topic to publish
		// parameters:
		// Arguments for the method or the topic
		// result:
		// A property to store a return value of the method call
		// error:
		// A property to store an error on the method call
		object : "",
		method : "",
		topic : "",
		parameters : "",
		result : "",
		error : "",

		_run : function() {
			// summary:
			// Invoke a method or publish a topic
			// description:
			// If 'topic' is specified, the topic is published with arguments
			// specified to 'parameters'.
			// If 'method' and 'object' are specified, the method is invoked
			// with arguments specified to 'parameters' and set the return
			// value to a property specified to 'result'.
			// 'object', 'parameters' and 'result' can specify properties of
			// a widget or an DOM element with the dotted notation.
			// If 'parameters' are omitted, the arguments to this method are
			// passed as is.
			if (this.topic) {
				var args = this._getParameters(arguments);
				try {
					dojo.publish(this.topic, args);
					this.onComplete();
				} catch (e) {
					this.onError(e);
				}
			} else if (this.method) {
				var scope = (this.object
						? dojox.wire.ml._getValue(this.object)
						: dojo.global);
				if (!scope) {
					return; // undefined
				}
				var args = this._getParameters(arguments);
				var func = scope[this.method];
				if (!func) {
					func = scope.callMethod;
					if (!func) {
						return; // undefined
					}
					args = [this.method, args];
				}
				try {
					var connected = false;
					if (scope.getFeatures) {
						var features = scope.getFeatures();
						if ((this.method == "fetch" && features["dojo.data.api.Read"])
								|| (this.method == "save" && features["dojo.data.api.Write"])) {
							var arg = args[0];
							if (!arg.onComplete) {
								arg.onComplete = function() {
								};
							}
							// dojo.connect(arg, "onComplete", this,
							// "onComplete");
							this.connect(arg, "onComplete", "onComplete");
							if (!arg.onError) {
								arg.onError = function() {
								};
							}
							// dojo.connect(arg, "onError", this, "onError");
							this.connect(arg, "onError", "onError");
							connected = true;
						}
					}
					var r = func.apply(scope, args);
					if (!connected) {
						if (r && (r instanceof dojo.Deferred)) {
							var self = this;
							r.addCallbacks(function(result) {
										self.onComplete(result);
									}, function(error) {
										self.onError(error);
									});
						} else {
							this.onComplete(r);
						}
					}
				} catch (e) {
					this.onError(e);
				}
			}
		},

		onComplete : function(/* anything */result) {
			// summary:
			// A function called when the method or the topic publish
			// completed
			// description:
			// If 'result' attribute is specified, the result object also set
			// to the specified property.
			// result:
			// The return value of a method or undefined for a topic
			if (this.result) {
				dojox.wire.ml._setValue(this.result, result);
			}
			if (this.error) { // clear error
				dojox.wire.ml._setValue(this.error, "");
			}
		},

		onError : function(/* anything */error) {
			// summary:
			// A function called on an error occurs
			// description:
			// If 'error' attribute is specified, the error object also set to
			// the specified property.
			// error:
			// The exception or error occurred
			if (this.error) {
				if (error && error.message) {
					error = error.message;
				}
				dojox.wire.ml._setValue(this.error, error);
			}
		},

		_getParameters : function(/* Array */args) {
			// summary:
			// Returns arguments to a method or topic to invoke
			// description:
			// This method retunrs an array of arguments specified by
			// 'parameters' attribute, a comma-separated list of IDs and
			// their properties in a dotted notation.
			// If 'parameters' are omitted, the original arguments are
			// used.
			// args:
			// Arguments to a trigger event or topic
			if (!this.parameters) {
				// use arguments as is
				return args; // Array
			}
			var parameters = [];
			var list = this.parameters.split(",");
			if (list.length == 1) {
				var parameter = dojox.wire.ml._getValue(list[0], args);
				if (dojo.isArray(parameter)) {
					parameters = parameter;
				} else {
					parameters.push(parameter);
				}
			} else {
				for (var i in list) {
					parameters.push(dojox.wire.ml._getValue(list[i], args));
				}
			}
			return parameters; // Array
		}
	});

}