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<?php abstract class WorkUnitDataType { //============================================== // consts / vars //============================================== const NoneDataType = 0; const BoolDataType = 1; const NumericDataType = 2; const StringDataType = 3; const ArrayDataType = 4; const JsonDataType = 5; const UrlDataType = 6; const FileDataType = 7; private static $cachedConstantArr; private $value; private $name; //============================================== // construct //============================================== final public function __construct() { $name = get_class($this); $this->value = WorkUnitDataType::getValueFromName($name); $this->name = $name; } //============================================== // accessing //============================================== final public function getName() { return $this->name; } final public function getValue() { return $this->value; } //============================================== // convenience //============================================== final public static function NoneDataType() { return new NoneDataType();} final public static function BoolDataType() { return new BoolDataType();} final public static function NumericDataType(){ return new NumericDataType();} final public static function StringDataType() { return new StringDataType();} final public static function ArrayDataType() { return new ArrayDataType();} final public static function JsonDataType() { return new JsonDataType();} final public static function UrlDataType() { return new UrlDataType();} final public static function FileDataType() { return new FileDataType();} final public static function equals($class) { if( is_subclass_of($class, 'WorkUnitDataType')) { return $this->getValue() == $class->getValue(); } return False; } //============================================== // utility //============================================== final private static function getConstants() { if (self::$cachedConstantArr == NULL) { self::$cachedConstantArr = array(); } $calledClass = get_called_class(); if (!array_key_exists($calledClass, self::$cachedConstantArr)) { $reflect = new ReflectionClass($calledClass); self::$cachedConstantArr[$calledClass] = $reflect->getConstants(); } return self::$cachedConstantArr[$calledClass]; } final public static function isValidName($name, $strict = false) { $constants = self::getConstants(); if ($strict) { return array_key_exists($name, $constants); } $keys = array_map('strtolower', array_keys($constants)); return in_array(strtolower($name), $keys); } final public static function isValidValue($value) { $values = array_values(self::getConstants()); return in_array($value, $values, $strict = true); } final public static function getNameFromValue($const) { foreach (self::getConstants() as $name => $value) { if ($value == $const) { return $name; } } return Null; } final public static function getValueFromName($text) { foreach (self::getConstants() as $name => $value) { if ($name == $text) { return $value; } } return -1; } } class NoneDataType extends WorkUnitDataType {} class BoolDataType extends WorkUnitDataType {} class NumericDataType extends WorkUnitDataType {} class StringDataType extends WorkUnitDataType {} class ArrayDataType extends WorkUnitDataType {} class JsonDataType extends WorkUnitDataType {} class UrlDataType extends WorkUnitDataType {} class FileDataType extends WorkUnitDataType {} $a = WorkUnitDataType::NumericDataType(); var_dump($a); echo "\n"; echo $a->getName() . "\n"; echo $a->getValue() . "\n"; echo "\n\n"; $a = WorkUnitDataType::BoolDataType(); var_dump($a); echo "\n"; echo $a->getName() . "\n"; echo $a->getValue() . "\n"; echo "\n\n"; echo $a->equals(WorkUnitDataType::NumericDataType()) . "\n" echo $a->equals(WorkUnitDataType::BoolDataType()) . "\n"

Version	System time (s)	User time (s)	Memory (MiB)
7.0.1	0.007	0.053	20.22
7.0.0	0.003	0.050	20.19
5.6.16	0.010	0.037	20.54
5.6.15	0.010	0.083	18.23
5.6.14	0.003	0.040	18.16
5.6.13	0.007	0.047	18.24
5.6.12	0.010	0.070	21.21
5.6.11	0.010	0.083	21.18
5.6.10	0.013	0.077	21.05
5.6.9	0.003	0.050	21.11
5.6.8	0.010	0.073	20.47
5.5.30	0.007	0.067	18.08
5.5.29	0.007	0.087	18.13
5.5.28	0.010	0.047	21.07
5.5.27	0.010	0.080	20.93
5.5.26	0.013	0.057	20.86
5.5.25	0.007	0.070	20.68
5.5.24	0.010	0.073	20.25