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<?php |
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/** |
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* An easily serializable class |
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* |
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* This file describes a serializable object |
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* |
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* PHP version 5 and 7 |
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* |
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* @author Patrick Boyd / [email protected] |
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* @copyright Copyright (c) 2015, Austin Artistic Reconstruction |
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* @license http://www.apache.org/licenses/ Apache 2.0 License |
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*/ |
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/** |
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* An object that can be serialized and accessed as an array. |
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* |
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* This class can be serialized to various formats |
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*/ |
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class SerializableObject implements ArrayAccess, JsonSerializable |
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{ |
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/** |
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* Create the object from an array |
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* |
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* @param array $array The array of object properties |
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*/ |
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public function __construct($array = false) |
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{ |
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if($array !== false) |
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{ |
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if(is_object($array)) |
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{ |
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$array = get_object_vars($array); |
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} |
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if(is_array($array)) |
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{ |
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foreach($array as $key => $value) |
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{ |
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$this->{$key} = $value; |
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} |
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} |
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} |
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} |
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/** |
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* Serialize the object into a format consumable by json_encode |
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* |
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* @return array The object in a more serialized format |
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*/ |
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public function jsonSerialize() |
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{ |
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return (array)$this; |
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} |
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/** |
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* Convert the object into an XML string |
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* |
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* @return string The XML format of the object |
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*/ |
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public function xmlSerialize() |
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{ |
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$xml = new XmlWriter(); |
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$xml->openMemory(); |
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$xml->startDocument('1.0'); |
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if(version_compare(PHP_VERSION, '7.0.0', '>=')) |
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{ |
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$this->php7XmlSerialize($xml); |
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} |
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else |
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{ |
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$this->oldPhpSerialize($xml); |
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} |
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$xml->endElement(); |
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return $xml->outputMemory(true); |
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} |
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private function php7XmlSerialize(XMLWriter $xml) |
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{ |
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if(isset($this[0])) |
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{ |
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$xml->startElement('Array'); |
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$this->array2XML($xml, 'Entity', get_object_vars($this)); |
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$xml->endElement(); |
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} |
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else |
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{ |
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$this->object2XML($xml, $this); |
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} |
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} |
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private function oldPhpSerialize(XMLWriter $xml) |
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{ |
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$tmp = json_decode(json_encode($this), false); |
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$tmpA = $tmp; |
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if(is_object($tmp)) |
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{ |
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$tmpA = get_object_vars($tmp); |
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} |
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if(isset($tmpA[0])) |
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{ |
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$xml->startElement('Array'); |
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$this->array2XML($xml, 'Entity', $tmpA); |
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$xml->endElement(); |
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} |
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else |
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{ |
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$this->object2XML($xml, $tmp); |
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} |
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} |
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/** |
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* Convert an object to XML without document tags |
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* |
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* @param XmlWriter $xml The XMLWriter to write the object to |
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* @param mixed $data The data to serialze to XML |
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*/ |
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private function object2XML(XMLWriter $xml, $data) |
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{ |
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foreach($data as $key => $value) |
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{ |
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if(is_array($value) || is_numeric($key)) |
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{ |
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$this->array2XML($xml, $key, (array)$value); |
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} |
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else if(is_object($value)) |
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{ |
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$xml->startElement($key); |
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$this->object2XML($xml, $value); |
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$xml->endElement(); |
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} |
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else |
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{ |
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if($key[0] === '$') |
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{ |
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$xml->writeElement(substr($key, 1), $value); |
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} |
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else |
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{ |
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$key = strtr($key, array(' '=>'', ','=>'')); |
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$xml->writeElement($key, $value); |
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} |
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} |
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} |
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} |
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/** |
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* Determine if an array has any string keys |
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* |
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* @param array $array The array to test |
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* |
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* @return boolean True if the array has string keys, false otherwise |
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*/ |
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private function arrayHasStringKeys(array $array) |
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{ |
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return count(array_filter(array_keys($array), 'is_string')) > 0; |
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} |
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/** |
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* Convert an array to XML without document tags |
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* |
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* @param XmlWriter $xml The XMLWriter to write the object to |
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* @param string $keyParent The key of the parent object |
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* @param mixed $data The data to serialze to XML |
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*/ |
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private function array2XML(XMLWriter $xml, $keyParent, $data) |
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{ |
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$data = array_values($data); |
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$count = count($data); |
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for($i = 0; $i < $count; $i++) |
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{ |
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$value = $data[$i]; |
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if(is_array($value) && isset($value[0])) |
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{ |
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$xml->startElement($keyParent); |
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$this->array2XML($xml, 'Child', $value); |
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$xml->endElement(); |
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} |
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else if(is_array($value) && $this->arrayHasStringKeys($value)) |
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{ |
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$xml->startElement($keyParent); |
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$this->object2XML($xml, $value); |
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$xml->endElement(); |
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} |
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else if(is_object($value)) |
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{ |
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$xml->startElement($keyParent); |
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$this->object2XML($xml, $value); |
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$xml->endElement(); |
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} |
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else |
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{ |
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$xml->writeElement($keyParent, $value); |
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} |
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} |
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} |
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/** |
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* Convert json back to an object |
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* |
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* @param string $json The JSON string to deserialize back into an object |
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* |
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* @return SerializableObject The object the json deserializes into |
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*/ |
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public static function jsonDeserialize($json) |
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{ |
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$array = json_decode($json, true); |
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return new self($array); |
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} |
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/** |
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* Convert the object to a serizlized string |
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* |
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* @param string $fmt The format to serialize into |
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* @param array|false $select Which fields to include |
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* |
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* @return string The object in string format |
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*/ |
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public function serializeObject($fmt = 'json', $select = false) |
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{ |
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$copy = $this; |
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if($select !== false) |
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{ |
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$copy = new self(); |
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$count = count($select); |
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for($i = 0; $i < $count; $i++) |
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{ |
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$copy->{$select[$i]} = $this->offsetGet($select[$i]); |
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} |
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} |
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switch($fmt) |
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{ |
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case 'json': |
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return json_encode($copy); |
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default: |
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throw new Exception('Unsupported fmt '.$fmt); |
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} |
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} |
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/** |
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* Function to allow the caller to set a value in the object via object[offset] = value |
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* |
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* @param string $offset The key to set |
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* @param mixed $value The value for the key |
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*/ |
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public function offsetSet($offset, $value) |
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{ |
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$this->{$offset} = $value; |
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} |
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/** |
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* Function to allow the caller to determin if a value in the object is set |
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* |
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* @param string $offset The key to determine if it has a value |
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* |
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* @return boolean Does the key have a value? |
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*/ |
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public function offsetExists($offset) |
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{ |
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return isset($this->{$offset}); |
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} |
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/** |
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* Function to allow the caller to delete the value in the object for a key |
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* |
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* @param string $offset The key to unset |
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*/ |
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public function offsetUnset($offset) |
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{ |
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unset($this->{$offset}); |
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} |
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/** |
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* Function to allow the caller to obtain the value for a key |
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* |
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* @param string $offset The key to return the value for |
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* |
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* @return mixed the value in the key |
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*/ |
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public function offsetGet($offset) |
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{ |
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return $this->{$offset}; |
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} |
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} |
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/* vim: set tabstop=4 shiftwidth=4 expandtab: */ |
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