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<?php |
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declare(strict_types=1); |
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/* |
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* Copyright 2016 Johannes M. Schmitt <[email protected]> |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace JMS\Serializer; |
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use JMS\Serializer\Accessor\AccessorStrategyInterface; |
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use JMS\Serializer\Exception\NotAcceptableException; |
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use JMS\Serializer\Exception\RuntimeException; |
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use JMS\Serializer\Metadata\ClassMetadata; |
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use JMS\Serializer\Metadata\PropertyMetadata; |
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class JsonSerializationVisitor extends AbstractVisitor implements SerializationVisitorInterface |
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{ |
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private $options = JSON_PRESERVE_ZERO_FRACTION; |
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private $dataStack; |
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private $data; |
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public function __construct( |
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GraphNavigatorInterface $navigator, |
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SerializationContext $context, |
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int $options = JSON_PRESERVE_ZERO_FRACTION) |
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{ |
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parent::__construct($navigator, $context); |
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$this->dataStack = new \SplStack; |
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$this->options = $options; |
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} |
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public function visitNull($data, array $type) |
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{ |
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return null; |
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} |
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public function visitString(string $data, array $type) |
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{ |
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return $data; |
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} |
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public function visitBoolean(bool $data, array $type) |
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{ |
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return $data; |
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} |
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public function visitInteger(int $data, array $type) |
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{ |
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return $data; |
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} |
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public function visitDouble(float $data, array $type) |
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{ |
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return $data; |
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} |
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/** |
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* @param array $data |
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* @param array $type |
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* @param SerializationContext $context |
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* @return mixed |
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*/ |
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public function visitArray(array $data, array $type) |
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{ |
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$this->dataStack->push($data); |
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$rs = isset($type['params'][1]) ? new \ArrayObject() : array(); |
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$isList = isset($type['params'][0]) && !isset($type['params'][1]); |
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$elType = $this->getElementType($type); |
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foreach ($data as $k => $v) { |
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try { |
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$v = $this->navigator->accept($v, $elType, $this->context); |
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} catch (NotAcceptableException $e) { |
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continue; |
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} |
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if ($isList) { |
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$rs[] = $v; |
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} else { |
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$rs[$k] = $v; |
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} |
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} |
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$this->dataStack->pop(); |
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return $rs; |
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} |
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public function startVisitingObject(ClassMetadata $metadata, object $data, array $type): void |
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{ |
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$this->dataStack->push($this->data); |
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$this->data = array(); |
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} |
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public function endVisitingObject(ClassMetadata $metadata, object $data, array $type) |
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{ |
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$rs = $this->data; |
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$this->data = $this->dataStack->pop(); |
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// Force JSON output to "{}" instead of "[]" if it contains either no properties or all properties are null. |
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if (empty($rs)) { |
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$rs = new \ArrayObject(); |
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} |
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return $rs; |
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} |
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public function visitProperty(PropertyMetadata $metadata, $v): void |
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{ |
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try { |
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$v = $this->navigator->accept($v, $metadata->type, $this->context); |
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} catch (NotAcceptableException $e) { |
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return; |
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} |
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if (true === $metadata->skipWhenEmpty && ($v instanceof \ArrayObject || \is_array($v)) && 0 === count($v)) { |
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return; |
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} |
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if ($metadata->inline) { |
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if (\is_array($v) || ($v instanceof \ArrayObject)) { |
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$this->data = array_merge($this->data, (array)$v); |
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} |
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} else { |
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$this->data[$metadata->serializedName] = $v; |
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} |
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} |
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/** |
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* Checks if some data key exists. |
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* |
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* @param string $key |
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* @return boolean |
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*/ |
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public function hasData($key) |
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{ |
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return isset($this->data[$key]); |
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} |
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/** |
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* Allows you to replace existing data on the current object/root element. |
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* |
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* @param string $key |
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* @param integer|float|boolean|string|array|null $value This value must either be a regular scalar, or an array. |
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* It must not contain any objects anymore. |
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*/ |
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public function setData($key, $value) |
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{ |
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$this->data[$key] = $value; |
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} |
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public function getResult($data) |
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{ |
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$result = @json_encode($data, $this->options); |
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switch (json_last_error()) { |
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case JSON_ERROR_NONE: |
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return $result; |
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case JSON_ERROR_UTF8: |
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throw new RuntimeException('Your data could not be encoded because it contains invalid UTF8 characters.'); |
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default: |
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throw new RuntimeException(sprintf('An error occurred while encoding your data (error code %d).', json_last_error())); |
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} |
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} |
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} |
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schmittjoh /
serializer
