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<?php |
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/** |
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* spindle/types |
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* |
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* @license CC0-1.0 (Public Domain) https://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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namespace Spindle\Types; |
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/** |
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* プロパティの型を保証するオブジェクト |
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*/ |
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abstract class TypedObject implements |
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Internal\TypedObjectInterface, |
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\IteratorAggregate, |
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\Countable |
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{ |
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private $_storage = array(); |
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private static $_schemaCache = array(); |
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private static $_defaultCache = array(); |
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public static $preventExtensions = true; |
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public static $casting = false; |
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final function __construct() |
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{ |
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$class = get_class($this); |
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if (isset(self::$_schemaCache[$class])) { |
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$this->_storage = self::$_defaultCache[$class]; |
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goto initialize; |
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} |
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$schema = $this->schema(); |
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if (! is_array($schema)) |
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throw new \DomainException("$class::schema() must return an array."); |
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foreach ($schema as $key => $type) { |
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if (is_int($key)) { |
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if (empty($lastKey)) |
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throw new \DomainException("$class::schema() is invalid."); |
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$this->_storage[$lastKey] = $type; |
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continue; |
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} else { |
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switch ($type) { |
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case self::STR: case self::BOOL: case self::INT: case self::OBJ: |
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case self::ARR: case self::RES: case self::DBL: case self::CALL: |
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case self::MIX: |
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break; |
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default: |
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if (!class_exists($type)) |
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throw new \DomainException("$class::schema()[$key] class not found."); |
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} |
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$this->_storage[$key] = null; |
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} |
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$lastKey = $key; |
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} |
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//スキーマをキャッシュする |
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self::$_schemaCache[$class] = $schema; |
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//デフォルト値をキャッシュする |
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self::$_defaultCache[$class] = $this->_storage; |
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initialize: |
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$initializer = array($this, 'initialize'); |
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if (is_callable($initializer)) { |
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$args = func_get_args(); |
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//func_get_args()の結果を直接渡すとエラーになる |
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call_user_func_array($initializer, $args); |
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} |
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} |
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/** |
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* template method |
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* function initialize() |
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* { |
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* } |
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*/ |
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/** |
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* schema()の定義を継承拡張する |
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* |
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* @param array $parent parent::schema()の結果 |
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* @param array $child 拡張するschema定義 |
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* @return array 継承拡張されたschema定義 |
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*/ |
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final static function extend(array $parent, array $child) |
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{ |
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//parent側を整理 |
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$parentSchema = array(); |
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$lastKey = null; |
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View Code Duplication |
foreach ($parent as $key => $val) { |
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if (is_int($key)) { |
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$parentSchema[$lastKey][] = $val; |
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} else { |
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$parentSchema[$key][] = $val; |
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} |
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$lastKey = $key; |
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} |
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//child側を整理 |
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$childSchema = array(); |
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$lastKey = null; |
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View Code Duplication |
foreach ($child as $key => $val) { |
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if (is_int($key)) { |
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$parentSchema[$lastKey][] = $val; |
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} else { |
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$parentSchema[$key][] = $val; |
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} |
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$lastKey = $key; |
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} |
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//マージ |
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$mergedSchema = $childSchema + $parentSchema; |
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//schemaの形式に復元 |
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$merged = array(); |
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foreach ($mergedSchema as $key => $val) { |
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$merged[$key] = $val[0]; |
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if (isset($val[1])) { |
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$merged[] = $val[1]; |
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} |
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} |
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return $merged; |
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} |
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final function __get($name) |
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{ |
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if (array_key_exists($name, $this->_storage)) { |
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return $this->_storage[$name]; |
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} |
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if (static::$preventExtensions) { |
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throw new \OutOfRangeException(get_class($this) . "->$name is not defined."); |
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} |
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return null; |
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} |
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final function __isset($name) |
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{ |
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return isset($this->_storage[$name]); |
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} |
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final function __unset($name) |
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{ |
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if (isset($this->_storage[$name])) { |
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$this->_storage[$name] = null; |
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} |
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} |
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final function __set($name, $value) |
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{ |
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$class = get_class($this); |
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$schema = self::$_schemaCache[$class]; |
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if (! array_key_exists($name, $schema)) { |
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if (static::$preventExtensions) { |
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throw new \OutOfRangeException("$class->$name is not defined."); |
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} else { |
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$this->_storage[$name] = $value; |
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return; |
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} |
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} |
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$type = $schema[$name]; |
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switch ($type) { |
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case self::CALL: |
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if (is_callable($value)) { |
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$this->_storage[$name] = $value; |
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return; |
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} |
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break; |
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case self::BOOL: case self::INT: case self::DBL: case self::STR: |
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case self::ARR: case self::OBJ: case self::RES: |
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if (gettype($value) === $type) { |
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$this->_storage[$name] = $value; |
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return; |
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} elseif (static::$casting) { |
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settype($value, $type); |
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$this->_storage[$name] = $value; |
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return; |
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} |
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break; |
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case self::MIX: |
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$this->_storage[$name] = $value; |
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return; |
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default: |
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if ($value instanceof $type) { |
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$this->_storage[$name] = $value; |
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return; |
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} elseif (static::$casting) { |
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$value = new $type($value); |
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$this->_storage[$name] = $value; |
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return; |
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} |
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} |
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throw new \InvalidArgumentException("$class->$name must be $type."); |
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} |
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/** |
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* エラーチェックのためのメソッド。 |
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* 要素間の関連であったり、null許可のチェックなどに使ってください。 |
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* |
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* ここではデフォルトとしてnullチェックを行います。 |
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*/ |
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function checkErrors() |
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{ |
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$errors = array(); |
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foreach ($this as $name => $val) { |
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if ($val === null) { |
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$errors[$name][] = 'value is null'; |
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} |
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} |
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return $errors; |
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} |
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/** |
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* クラスが持っている属性の一覧を取得します。 |
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* |
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* @return array |
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*/ |
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function keys() |
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{ |
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return array_keys($this->_storage); |
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} |
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/** |
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* クラス名を返します。 |
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* |
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* @return string |
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*/ |
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static function className() |
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{ |
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return get_called_class(); |
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} |
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/** |
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* override \IteratorAggregate::getIterator |
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*/ |
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function getIterator() |
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{ |
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return new \ArrayIterator($this->_storage); |
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} |
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/** |
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* override \Countable::count |
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*/ |
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function count() |
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{ |
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return count($this->_storage); |
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} |
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/** |
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* @param array $arr |
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* @return TypedObject |
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*/ |
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static function fromArray(array $arr) |
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{ |
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$self = new static; |
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foreach ($arr as $key => $val) { |
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$self->__set($key, $val); |
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} |
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return $self; |
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} |
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/** |
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* @return array; |
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*/ |
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function toArray() |
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{ |
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return $this->_storage; |
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} |
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} |
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Adding explicit visibility (
private
,protected
, orpublic
) is generally recommend to communicate to other developers how, and from where this method is intended to be used.