Common Methods

Taking Input Values From a Request

The takeValuesFromRequest:inContext: method is invoked during the first phase of the request-response loop, immediately after all of the objects involved in the request have performed their awake methods. When this phase concludes, the request component has been initialized with the bindings made in WebObjects Builder.

Override takeValuesFromRequest:inContext: when you want to do one of the following:

Access information from the request or context object.
Perform postprocessing on user input.

In the first case, you can place your code before the message to super. In the second case, you must place your code after the message to super. For example, the following implementation of takeValuesFromRequest:inContext: records the kinds of browsers-user agents-from which requests are made:

	// WebScript example
	- takeValuesFromRequest:request inContext:context {
		id userAgent = [request headerForKey:@"user-agent"];
		[self recordUserAgent:userAgent]; 
		[super takeValuesFromRequest:request inContext:context];
	}

The following example performs postprocessing. It takes the values for the street, city, state, and zipCode variables and stores them in the address variable formatted as a standard mailing address.

	// WebScript example
	- takeValuesFromRequest:request inContext:context {
	[super takeValuesFromRequest:request inContext:context];
	address = [NSString stringWithFormat:@"%@\n%@, %@  %@",
		street, city, state, zipCode];
	}
	// Java example
	public void takeValuesFromRequest(Request request, Context context) {
	super.takeValuesFromRequest(request, context);
	address = street + city + state + zipCode;
	}

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