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<?php |
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/****************************************************************************** |
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* An implementation of dicto (scg.unibe.ch/dicto) in and for PHP. |
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* |
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* Copyright (c) 2016 Richard Klees <[email protected]> |
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* |
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* This software is licensed under The MIT License. You should have received |
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* a copy of the license along with the code. |
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*/ |
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namespace Lechimp\Dicto\Graph; |
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/** |
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* An entity in the graph has a type and stores key value pairs as properties. |
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* It will be concretized to a node or a relation. |
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*/ |
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abstract class Entity { |
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/** |
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* @var string |
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*/ |
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private $type; |
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/** |
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* @var array<string,mixed>|null |
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*/ |
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private $properties = []; |
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/** |
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* @param string $type |
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* @param array<string,mixed>|null $properties |
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*/ |
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public function __construct($type, array $properties = null) { |
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assert('is_string($type)'); |
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$this->type = $type; |
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if ($properties !== null) { |
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foreach ($properties as $key => $value) { |
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$this->set_property($key, $value); |
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} |
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} |
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} |
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/** |
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* Get the type. |
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* |
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* @return string |
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*/ |
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public function type() { |
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return $this->type; |
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} |
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/** |
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* Set a property. |
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* |
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* @param string $key |
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* @param mixed $value |
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* @return null |
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*/ |
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private function set_property($key, $value) { |
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assert('is_string($key)'); |
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$this->properties[$key] = $value; |
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} |
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/** |
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* Get the properties. |
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* |
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* @return array<string,mixed> |
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*/ |
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public function properties() { |
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if ($this->properties === null) { |
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return []; |
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} |
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return $this->properties; |
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} |
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/** |
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* Get one property. |
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* |
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* @param string $name |
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* @throws \InvalidArgumentException if named propery does not exist |
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* @return mixed |
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*/ |
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public function property($name) { |
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if (!$this->has_property($name)) { |
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$type = $this->type; |
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throw new \InvalidArgumentException( |
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"Unknown property '$name' for entity with type '$type'"); |
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} |
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return $this->properties[$name]; |
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} |
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/** |
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* Check if entity has a property. |
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* |
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* @param string $name |
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* @return bool |
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*/ |
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public function has_property($name) { |
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return array_key_exists($name, $this->properties); |
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} |
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} |
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lechimp-p /
dicto.php
