:octocat: make datamode field static

src/Data/AlphaNum.php

@@ -38,7 +38,7 @@ final class AlphaNum extends QRDataModeAbstract{
 		'+' => 40, '-' => 41, '.' => 42, '/' => 43, ':' => 44,
 	];
 
-	protected int $datamode = Mode::DATA_ALPHANUM;
+	protected static int $datamode = Mode::DATA_ALPHANUM;
 
 	/**
 	 * @inheritdoc
@@ -68,8 +68,8 @@ final class AlphaNum extends QRDataModeAbstract{
 		$len = $this->getCharCount();
 
 		$bitBuffer
-			->put($this->datamode, 4)
-			->put($len, Mode::getLengthBitsForVersion($this->datamode, $versionNumber))
+			->put($this::$datamode, 4)
+			->put($len, Mode::getLengthBitsForVersion($this::$datamode, $versionNumber))
 		;
 
 		// encode 2 characters in 11 bits

src/Data/Byte.php

@@ -24,7 +24,7 @@ use function ord;
  */
 final class Byte extends QRDataModeAbstract{
 
-	protected int $datamode = Mode::DATA_BYTE;
+	protected static int $datamode = Mode::DATA_BYTE;
 
 	/**
 	 * @inheritdoc
@@ -47,8 +47,8 @@ final class Byte extends QRDataModeAbstract{
 		$len = $this->getCharCount();
 
 		$bitBuffer
-			->put($this->datamode, 4)
-			->put($len, Mode::getLengthBitsForVersion($this->datamode, $versionNumber))
+			->put($this::$datamode, 4)
+			->put($len, Mode::getLengthBitsForVersion($this::$datamode, $versionNumber))
 		;
 
 		$i = 0;

src/Data/ECI.php

@@ -21,7 +21,7 @@ use chillerlan\QRCode\Common\{BitBuffer, Mode};
  */
 final class ECI extends QRDataModeAbstract{
 
-	protected int $datamode = Mode::DATA_ECI;
+	protected static int $datamode = Mode::DATA_ECI;
 
 	/**
 	 * The current ECI encoding id
@@ -58,7 +58,7 @@ final class ECI extends QRDataModeAbstract{
 	 */
 	public function write(BitBuffer $bitBuffer, int $versionNumber):void{
 		$bitBuffer
-			->put($this->datamode, 4)
+			->put($this::$datamode, 4)
 			->put($this->encoding, 8)
 		;
 	}

src/Data/Kanji.php

@@ -24,7 +24,7 @@ use function mb_convert_encoding, mb_detect_encoding, mb_strlen, ord, sprintf, s
  */
 final class Kanji extends QRDataModeAbstract{
 
-	protected int $datamode = Mode::DATA_KANJI;
+	protected static int $datamode = Mode::DATA_KANJI;
 
 	public function __construct(string $data){
 		parent::__construct($data);
@@ -75,8 +75,8 @@ final class Kanji extends QRDataModeAbstract{
 	public function write(BitBuffer $bitBuffer, int $versionNumber):void{
 
 		$bitBuffer
-			->put($this->datamode, 4)
-			->put($this->getCharCount(), Mode::getLengthBitsForVersion($this->datamode, $versionNumber))
+			->put($this::$datamode, 4)
+			->put($this->getCharCount(), Mode::getLengthBitsForVersion($this::$datamode, $versionNumber))
 		;
 
 		$len = strlen($this->data);

src/Data/Number.php

@@ -31,7 +31,7 @@ final class Number extends QRDataModeAbstract{
 		'0' => 0, '1' => 1, '2' => 2, '3' => 3, '4' => 4, '5' => 5, '6' => 6, '7' => 7, '8' => 8, '9' => 9,
 	];
 
-	protected int $datamode = Mode::DATA_NUMBER;
+	protected static int $datamode = Mode::DATA_NUMBER;
 
 	/**
 	 * @inheritdoc
@@ -61,8 +61,8 @@ final class Number extends QRDataModeAbstract{
 		$len = $this->getCharCount();
 
 		$bitBuffer
-			->put($this->datamode, 4)
-			->put($len, Mode::getLengthBitsForVersion($this->datamode, $versionNumber))
+			->put($this::$datamode, 4)
+			->put($len, Mode::getLengthBitsForVersion($this::$datamode, $versionNumber))
 		;
 
 		$i = 0;

src/Data/QRDataModeAbstract.php

@@ -19,7 +19,7 @@ abstract class QRDataModeAbstract implements QRDataModeInterface{
 	/**
 	 * the current data mode: Num, Alphanum, Kanji, Byte
 	 */
-	protected int $datamode;
+	protected static int $datamode;
 
 	/**
 	 * The data to write
@@ -44,7 +44,7 @@ abstract class QRDataModeAbstract implements QRDataModeInterface{
 	 * @inheritDoc
 	 */
 	public function getDataMode():int{
-		return $this->datamode;
+		return $this::$datamode;
 	}
 
 }