PHP Objects, Patterns, and Practice, Third Edition

CHAPTER 12 ■ ENTERPRISE PATTERNS

251

Recall this fragment:

<command name="AddVenue">

<view>addvenue</view>

<status value="CMD_OK">

<forward>AddSpace</forward>

</status>

</command>

Here is the call the parse code will make to add the correct element to the $viewMap property:

$map->addView( 'AddVenue', 0, 'addvenue' );

and here is the call for populating the $forwardMap property:

$map->addForward( 'AddVenue', 1, 'AddSpace' );

The application controller class uses these combinations in a particular search order. Let’s say the

AddVenue command has returned CMD_OK (which maps to 1, while 0 is CMD_DEFAULT). The application

controller will search the $forwardMap array from the most specific combination of Command and status

flag to the most ...