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Obtaining instances of Zend_Gdata classes

The Zend Framework naming standards require that all classes be named based upon the directory structure in which they are located. For instance, extensions related to Spreadsheets are stored in: Zend/Gdata/Spreadsheets/Extension/... and, as a result of this, are named Zend_Gdata_Spreadsheets_Extension_.... This causes a lot of typing if you're trying to construct a new instance of a spreadsheet cell element!

We've implemented a magic factory method in all service classes (such as Zend_Gdata_App, Zend_Gdata, Zend_Gdata_Spreadsheets) that should make constructing new instances of data model, query and other classes much easier. This magic factory is implemented by using the magic __call() method to intercept all attempts to call $service->newXXX(arg1, arg2, ...). Based off the value of XXX, a search is performed in all registered 'packages' for the desired class. Here's some examples:

= new Zend_Gdata_Spreadsheets();

// creates a Zend_Gdata_App_Spreadsheets_CellEntry
$entry $ss->newCellEntry();

// creates a Zend_Gdata_App_Spreadsheets_Extension_Cell
$cell $ss->newCell();
$cell->setText('My cell value');
$entry->cell $cell;

// ... $entry can then be used to send an update to a Google Spreadsheet

Each service class in the inheritance tree is responsible for registering the appropriate 'packages' (directories) which are to be searched when calling the magic factory method.

Zend Framework