[PHP] Adapter Pattern Example

PatternAdapter_Error.php

<?php

class errorObject{
	private $__error;
	
	public function __construct($error){
		$this->__error = $error;
	}

	public function getError(){
		return $this->__error;
	}
}

class logToConsole{
	private $__errorObject;
	
	public function __construct($errorObject){
		$this->__errorObject = $errorObject;
	}
	
	public function write(){
		fwrite(STDERR,$this->__errorObject->getError());
	}
}

class logToCSV{
	const CSV_LOCATION = "log.csv";	
	private $__errorObject;
	
	public function __construct($errorObject){
		$this->__errorObject = $errorObject;
	}

	public function write(){
		$line = $this->__errorObject->getErrorNumber();
		$line .= ',';
		$line .= $this->__errorObject->getErrorText();
		$line .= "\n";
		file_put_contents(self::CSV_LOCATION, $line, FILE_APPEND);
	}
}

class logToCSVAdapter extends errorObject{
	private $__errorNumber, $__errorText;
	
	public function __construct($error){
		parent::__construct($error);
		$parts = explode(':', $this->getError());
		$this->__errorNumber = $parts[0];
		$this->__errorText = $parts[1];
	}

	public function getErrorNumber(){
		return $this->__errorNumber;
	}
	
	public function getErrorText(){
		return $this->__errorText;
	}
}

/** create the new 404 error object **/
// $error = new errorObject("404:Not Found");
$error = new logToCSVAdapter("404:Not Found");

/** write the error to the console **/
// $log = new logToConsole($error);
// $log = new logToCSVAdapter($error);
$log = new logToCSV($error);
$log->write();

?>