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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\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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use JMS\Serializer\Visitor\SerializationVisitorInterface; |
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final 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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/** |
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* @var \ArrayObject |
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*/ |
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private $data; |
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public function __construct( |
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int $options = JSON_PRESERVE_ZERO_FRACTION) |
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{ |
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$this->dataStack = []; |
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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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* @return mixed |
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*/ |
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public function visitArray(array $data, array $type) |
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{ |
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\array_push($this->dataStack, $data); |
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$rs = isset($type['params'][1]) ? new \ArrayObject() : []; |
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$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); |
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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] = $v; |
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} |
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} |
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\array_pop($this->dataStack); |
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return $rs; |
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} |
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public function startVisitingObject(ClassMetadata $metadata, object $data, array $type): void |
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{ |
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\array_push($this->dataStack, $this->data); |
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$this->data = $metadata->isMap === true ? new \ArrayObject() : []; |
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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 = \array_pop($this->dataStack); |
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if ($metadata->isList !== true && empty($rs)) { |
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return 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); |
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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) || ($v instanceof \ArrayObject)) { |
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// concatenate the two array-like structures |
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// is there anything faster? |
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foreach ($v as $key => $value) { |
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$this->data[$key] = $value; |
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} |
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} |
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} else { |
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$this->data[$metadata->serializedName] = $v; |
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} |
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} |
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/** |
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* @deprecated Will be removed in 3.0 |
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* |
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* Checks if some data key exists. |
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* @param string $key |
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* @return boolean |
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*/ |
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public function hasData(string $key): bool |
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{ |
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return isset($this->data[$key]); |
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} |
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/** |
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* @deprecated Use visitProperty(new StaticPropertyMetadata(null, 'name', 'value'), null) instead |
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* |
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* Allows you to replace existing data on the current object element. |
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* |
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* @param string $key |
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* @param mixed $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(string $key, $value): void |
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{ |
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$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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Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a mixed type is assigned to a property that is type hinted more strictly.
For example, imagine you have a variable
$accountIdthat can either hold an Id object or false (if there is no account id yet). Your code now assigns that value to theidproperty of an instance of theAccountclass. This class holds a proper account, so the id value must no longer be false.Either this assignment is in error or a type check should be added for that assignment.