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Obviously, the business developer may periodically interact with other classes as well, but these are the ones that will be at the center of most activity. Classes or methods that the business developer shouldn t have access to will be scoped to prevent accidental use. Table 2-1 summarizes each class and its intended purpose.

The argument to the annotation is an array of strings hence the extra set of {}s in there. If instead of suppressing warnings related to generics you want to avoid the warning generated by compiling the source in Listing 10-1, you would add an @SuppressWarnings({"deprecation"}) annotation to where the deprecated method call was made. Listing 10-2 shows an updated DeprecatedUsage class.

The is keyword is used as an operator and returns true if an object is of the specified type. The as keyword will return the object cast to the target type only if it is legal to do so; otherwise, null will be returned.

NSString *kCellIdentifier = @"TableRow"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:kCellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:kCellIdentifier] autorelease]; } // put service name as cell text cell.text = [[services objectAtIndex:indexPath.row] name]; cell.accessoryView = nil; return cell; } - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { // user chose a service from table start resolving it NSNetService *resolveService = [services objectAtIndex:indexPath.row]; [resolveService setDelegate:self]; [resolveService resolveWithTimeout:0.0]; [[tableView cellForRowAtIndexPath:indexPath] setSelected:NO]; } #pragma mark cleaning up -(void)stopService { [service stop]; [service removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes]; [service release]; service = nil; } -(void)stopBrowsing { [serviceBrowser stop]; [serviceBrowser release]; serviceBrowser = nil; }

You want to create a mirror in your scene, for example, to create a rear mirror for a racing game. You can also use this technique to create a reflection map.

The execution environment, however, always has access to Main, regardless of its declared access level or the declared access level of the class or struct in which it is declared. By default, when Visual Studio creates a project, it creates a program outline where Main is implicitly private. You can always add the public modifier if you need to do so.

The Update() method is more complex. Remember that the Update() process adapts itself to the type of business object being updated, so it checks to see if the object is a subclass of BusinessBase or CommandBase and behaves appropriately. Also recall that the actual business object is passed as a parameter to Update(), so this method doesn t need to create an instance of the business object at all.

That s a typical web services client. You can either build up the SOAP message with the previously described javax.xml.soap package, or, as the program does, just place the XML for the SOAP request in a file (with your Google key) as part of the SOAP message. Then, you can query Google from your program.

Listing 12-23. Exposing an STL/CLR Container to a C# Program // stlclr_exposedtocs.cpp // compile with: stlclr_exposedtocs.cpp /clr:pure /LD #include <cliext\vector> using namespace cliext; using namespace System; using namespace System::Collections::Generic; namespace N { public ref class R { private: vector<int>^ m_vec; public: R(int initial_size) { // Create a vector m_vec = gcnew vector<int>(initial_size); // Populate it for (int i = 0; i < initial_size; i++) { m_vec[i] = i; } } // The property to be accessed from C# cannot directly be the STL/CLR // vector type, // since that type is assembly-private and cannot be used in a public interface property IList<int>^ Vec { IList<int>^ get() { return m_vec; } } }; } Now in the C# program in Listing 12-24, create the C++/CLI public type and use the .NET generic interfaces.

The second step is to call the Start method. The TcpListener object has been created, but until you call the Start method, you won t get any client connections. Here is the relevant statement from Listing 21-6:

shown in Figure 4-19.