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<?php |
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/* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* The software is based on the Axon Framework project which is |
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* licensed under the Apache 2.0 license. For more information on the Axon Framework |
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* see <http://www.axonframework.org/>. |
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* |
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* This software consists of voluntary contributions made by many individuals |
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* and is licensed under the MIT license. For more information, see |
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* <http://www.governor-framework.org/>. |
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*/ |
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namespace Governor\Framework\Domain; |
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use JMS\Serializer\Annotation\Type; |
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use JMS\Serializer\Annotation\Exclude; |
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/** |
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* The object holds meta data information attached to a {@see MessageInterface} |
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* |
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* @author "David Kalosi" <[email protected]> |
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* @license <a href="http://www.opensource.org/licenses/mit-license.php">MIT License</a> |
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*/ |
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class MetaData implements \IteratorAggregate, \Countable |
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{ |
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/** |
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* @Exclude |
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* @var MetaData |
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*/ |
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private static $emptyInstance; |
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const METADATA_IMMUTABLE = 'The MetaData object is immutable'; |
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/** |
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* Metadata storage. |
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* |
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* @Type ("array") |
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* @var array |
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*/ |
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private $metadata = []; |
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/** |
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* Constructor. |
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* |
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* @param array $metadata |
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*/ |
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public function __construct(array $metadata = []) |
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{ |
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$this->metadata = $metadata; |
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} |
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/** |
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* Returns the metadata. |
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* |
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* @return array An array of metadata |
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* |
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* @api |
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*/ |
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public function all() |
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{ |
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return $this->metadata; |
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} |
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/** |
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* Returns the metadata keys. |
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* |
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* @return array An array of metadata keys |
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* |
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* @api |
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*/ |
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public function keys() |
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{ |
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return array_keys($this->metadata); |
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} |
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/** |
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* Returns a metadadta. |
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* |
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* @param string $key The metadadta key |
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* |
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* @return mixed |
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*/ |
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public function get($key) |
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{ |
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return isset($this->metadata[$key]) ? $this->metadata[$key] : null; |
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} |
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/** |
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* Adds metadata. |
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* |
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* @param array $metadata An array of metadata |
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* @return \Governor\Framework\Domain\MetaData |
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*/ |
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public function mergeWith(array $metadata = []) |
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{ |
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if (empty($metadata)) { |
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return $this; |
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} |
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return new MetaData(array_replace($this->metadata, $metadata)); |
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} |
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/** |
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* |
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* @param array $keys |
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* @return \Governor\Framework\Domain\MetaData |
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*/ |
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public function withoutKeys(array $keys = []) |
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{ |
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if (empty($keys)) { |
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return $this; |
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} |
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1 |
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$newMetadata = $this->metadata; |
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foreach ($keys as $key) { |
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if (isset($newMetadata[$key])) { |
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unset($newMetadata[$key]); |
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} |
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} |
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return new MetaData($newMetadata); |
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} |
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/** |
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* |
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* @return boolean |
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*/ |
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public function isEmpty() |
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{ |
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return empty($this->metadata); |
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} |
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/** |
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* Returns true if the key is defined. |
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* |
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* @param string $key The key |
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* |
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* @return Boolean true if the parameter exists, false otherwise |
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* |
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* @api |
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*/ |
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public function has($key) |
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{ |
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return isset($this->metadata[$key]); |
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} |
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/** |
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* Returns the number of metadata entries. |
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* |
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* @return integer Element count |
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*/ |
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public function count() |
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{ |
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return count($this->metadata); |
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} |
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/** |
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* Returns an iterator, |
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* |
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* @return \ArrayIterator |
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*/ |
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1 |
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public function getIterator() |
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{ |
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return new \ArrayIterator($this->metadata); |
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} |
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/** |
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* |
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* @return MetaData |
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*/ |
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138 |
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public static function emptyInstance() |
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{ |
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if (!isset(self::$emptyInstance)) { |
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self::$emptyInstance = new MetaData(); |
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1 |
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} |
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return self::$emptyInstance; |
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} |
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/** |
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* @param mixed $other |
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* @return bool |
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*/ |
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public function isEqualTo($other) |
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{ |
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if (is_array($other)) { |
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return $this->metadata == $other; |
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} |
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if (is_object($other)) { |
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return $this == $other; |
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} |
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return false; |
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} |
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} |
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