Source for file Callback.php
Documentation is available at Callback.php
* This file contains the interface XML_Query2XML_Callback.
* @author Lukas Feiler <lukas.feiler@lukasfeiler.com>
* @copyright 2007 Lukas Feiler
* @license http://www.gnu.org/copyleft/lesser.html LGPL Version 2.1
* @version CVS: $Id: Callback.php 276639 2009-03-01 13:17:08Z lukasfeiler $
* @link http://pear.php.net/package/XML_Query2XML
* If you want to use a non-static method as a callback for XML_Query2XML
* you have to use an instance of a class that implements this interface.
* Your command class (read more about the command pattern
* {@link http://en.wikipedia.org/wiki/Command_pattern here}) therefore
* has to implement a public method that is named "execute" and accepts an
* array as its first argument. Here goes an example:
* require_once 'XML/Query2XML/Callback.php';
* class MyCallback implements XML_Query2XML_Callback
* public function execute(array $record)
* $data = $record['some_column'];
* // do some really complex things with $data
* $myCallback = new MyCallback();
* XML_Query2XML will always invoke the execute() method and will pass
* the current record as an associative array as the first and only argument.
* A command object can be used for
* - Simple Element Specifications
* - Complex Element Specifications ($options['value')
* - Simple Attribute Specifications
* - Complex Attribute Specifications ($options['value')
* - $options['condition']
* - $options['sql']['data']
* If you want to use the same command class for different columns, I suggest
* you pass the column name to the constructor:
* require_once 'XML/Query2XML/Callback.php';
* class MyCallback implements XML_Query2XML_Callback
* private $_columnName = '';
* public function __construct($columnName)
* $this->_columnName = $columnName;
* public function execute(array $record)
* if (!isset($record[$this->_columnName])) {
* // throw an exception here
* $data = $record[$this->_columnName];
* // do some really complex things with $data
* $myCallback = new MyCallback('some_column_name');
* @author Lukas Feiler <lukas.feiler@lukasfeiler.com>
* @copyright 2006 Lukas Feiler
* @license http://www.gnu.org/copyleft/lesser.html LGPL Version 2.1
* @version Release: 1.7.2
* @link http://pear.php.net/package/XML_Query2XML
* This method will be called by XML_Query2XML.
* This method has to return a value that can be cast to a string
* or if used within a Complex Element Specification, an instance
* @param array $record A record as an associative array.
* @return mixed A value that can be cast to a string or an instance of DOMNode.
public function execute(array $record);
Documentation generated on Sun, 03 Apr 2011 13:13:07 +0200 by phpDocumentor 1.4.1