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<?php |
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declare(strict_types=1); |
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namespace JsonStreamParser; |
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use JsonStreamParser\Decoder\Element; |
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/** |
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* @author Stefan Pöhner <[email protected]> |
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* @license MIT |
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* |
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* @package JsonStreamParser |
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*/ |
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class Decoder |
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{ |
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/** |
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* @var mixed |
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*/ |
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private $result; |
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/** |
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* @var Element |
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*/ |
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private $current; |
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public function endOfStream() |
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{ |
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} |
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public function beginObject() |
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{ |
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$this->createChild(Element::TYPE_OBJECT, new \stdClass()); |
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} |
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public function endObject() |
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{ |
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if ($this->current->type != Element::TYPE_OBJECT) { |
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throw new \UnexpectedValueException('There is no object to end.'); |
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} |
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$this->moveUp(); |
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} |
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public function beginArray() |
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{ |
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$this->createChild(Element::TYPE_ARRAY, []); |
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} |
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public function endArray() |
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{ |
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if ($this->current->type != Element::TYPE_ARRAY) { |
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throw new \UnexpectedValueException('There is no array to end.'); |
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} |
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$this->moveUp(); |
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} |
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/** |
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* @param mixed $value |
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*/ |
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public function appendValue($value) |
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{ |
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if ($this->current instanceof Element) { |
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if ($this->current->type == Element::TYPE_ARRAY) { |
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$this->current->value[] = $value; |
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} elseif ($this->current->type == Element::TYPE_OBJECT) { |
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$this->createChild(Element::TYPE_KEY, $value); |
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} elseif ($this->current->type == Element::TYPE_KEY) { |
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// get the key back |
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$key = $this->current->value; |
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// move up to object |
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$this->current = $this->current->parent; |
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// append key value pair |
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$this->current->value->$key = $value; |
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} |
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} else { |
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$this->result = $value; |
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} |
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} |
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public function whitespace($char) |
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{ |
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} |
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public function keyValueSeparator() |
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{ |
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if (!$this->current instanceof Element || $this->current->type != Element::TYPE_KEY) { |
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throw new \UnexpectedValueException('Not in object context.'); |
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} |
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} |
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public function arraySeparator() |
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{ |
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if (!$this->current instanceof Element || !in_array($this->current->type, [Element::TYPE_ARRAY, Element::TYPE_OBJECT])) { |
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throw new \UnexpectedValueException('Not in array or object context.'); |
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} |
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} |
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/** |
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* @return mixed |
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*/ |
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public function getResult() |
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{ |
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return $this->result; |
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} |
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/** |
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* Move up the tree. |
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*/ |
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private function moveUp() |
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{ |
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$value = $this->current->value; |
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if ($this->current->parent) { |
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$this->current = $this->current->parent; |
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} else { |
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$this->current = null; |
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} |
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$this->appendValue($value); |
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} |
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/** |
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* @param int $type |
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* @param mixed $value |
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*/ |
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private function createChild(int $type, $value) |
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{ |
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$element = new Element($type); |
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$element->parent = $this->current; |
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$element->value = $value; |
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$this->current = $element; |
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} |
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} |
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spoehner /
jsonstreamparser
This check looks from parameters that have been defined for a function or method, but which are not used in the method body.