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Visitor 3 (Interpreter) [80, 0, 100, 100, 85, 51, 52, 50, 57, 56] = 56.15 [87, 95, 100, 100, 77, 70, 99, 100, 75, 94] = 89.88 [0, 55, 100, 65, 55, 75, 73, 74, 71, 72] = 70.8 */

When using ASP .NET AJAX, you now have access to the Sys.Services.ProfileService service from JavaScript. In the next sections, you ll see how to use this to access your custom properties.

public PortletContext getPortletContext()

See the following code for another example of the Intrepreter Pattern:

Because we covered the portlet context in 4, we are not going to cover the same material in this chapter. Some functionality on the portlet context, such as context attributes and the portlet API version, is relevant to portlet configuration. For instance, the getServerInfo() method on the PortletContext interface returns the portlet container s name and version number. You could use this in case some portlet containers are released with bugs that need workarounds.

The Profile service offers a load method that you use to read in the properties from the property store. This is usually called as part of the Login callback, which makes sense you want to authenticate the user, and then use their validated credentials to load their profile data. This takes a number of properties:

Initialization parameters specify configuration data for the portlet. You use them to provide default values for file paths, connection data, or other deployment-specific details. One point to note is that these are initialization parameters for all of the

using using using using using using System; System.Xml; System.Reflection; System.Collections; System.Collections.Generic; System.Windows.Forms;

propertyNames: String array containing the names of profile properties to load loadCompletedCallback: Callback function to call upon profile loading failedCallback: Callback function to call upon failure of profile loading userContext: String information to pass to the callback functions

users of the portlet. User-specific configuration should be done with portlet preferences, which we discuss at the end of this chapter. The initialization parameters are stored in the portlet.xml deployment descriptor. Each portlet could have zero or more initialization parameters. Each parameter consists of a name, a value, and an optional description. String objects represent both the name and the value. Each <init-param> element in the portlet deployment descriptor represents one initialization parameter. The <init-param> elements are children of the <portlet> element. The initialization parameters section of a portlet deployment descriptor follows:

public class Mirror { // // // // // // Mirrors Hans Lombard June 2006, revised Sept 2007 Based on Views and Views-2 by Nigel Horspool, Judith Bishop, and D-J Miller A general-purpose interpreter for any .NET API Reads XML and executes the methods it represents This example assumes the Windows Form API only in the final line where Application.Run is called

<portlet-app> <portlet> ... <init-param> <name>connectionPort</name> <value>9001</value> </init-param> <init-param> <name>connectionServer</name> <value>127.0.0.1</value> </init-param> ... </portlet> </portlet-app>

For example, a simple call to load will look like this:

A portlet accesses its initialization parameters through the PortletConfig object. The getInitParameter(String name) method takes the name of the initialization parameter as its argument, and returns the value of the initialization parameter as a String object. If the parameter does not exist in the deployment descriptor, the method will return a null value. If the name passed in as an argument is null, the method will throw an IllegalArgumentException.

Stack objectStack; List<Command> commands; public object CurrentObject { get { return objectStack.Peek( ); } } public XmlTextReader Reader { get; set; } public object LastObject { get; set; } public Mirror(string spec) { objectStack = new Stack( ); objectStack.Push(null); // Register the commands commands = new List<Command>( ); commands.Add(new ElementCommand( )); commands.Add(new EndElementCommand( )); commands.Add(new AttributeCommand( )); Reader = new XmlTextReader(spec); while (Reader.Read( )) { InterpretCommands( ); bool b = Reader.IsEmptyElement; if (Reader.HasAttributes) { for (int i = 0; i < Reader.AttributeCount; i++) { Reader.MoveToAttribute(i); InterpretCommands( ); } }

Sys.Services.ProfileService.load(null, OnProfileLoadComplete, null, null);

public String getInitParameter(String name)