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99 lines
2.6 KiB
PHP
99 lines
2.6 KiB
PHP
<?php
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/**
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* @link http://www.yiiframework.com/
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* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db;
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use yii\base\InvalidConfigException;
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/**
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* Class JsonExpression represents data that should be encoded to JSON.
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*
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* For example:
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*
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* ```php
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* new JsonExpression(['a' => 1, 'b' => 2]); // will be encoded to '{"a": 1, "b": 2}'
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* ```
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*
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* @author Dmytro Naumenko <d.naumenko.a@gmail.com>
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* @since 2.0.14
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*/
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class JsonExpression implements ExpressionInterface, \JsonSerializable
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{
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const TYPE_JSON = 'json';
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const TYPE_JSONB = 'jsonb';
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/**
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* @var mixed the value to be encoded to JSON.
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* The value must be compatible with [\yii\helpers\Json::encode()|Json::encode()]] input requirements.
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*/
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protected $value;
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/**
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* @var string|null Type of JSON, expression should be casted to. Defaults to `null`, meaning
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* no explicit casting will be performed.
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* This property will be encountered only for DBMSs that support different types of JSON.
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* For example, PostgreSQL has `json` and `jsonb` types.
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*/
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protected $type;
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/**
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* JsonExpression constructor.
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*
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* @param mixed $value the value to be encoded to JSON.
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* The value must be compatible with [\yii\helpers\Json::encode()|Json::encode()]] requirements.
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* @param string|null $type the type of the JSON. See [[JsonExpression::type]]
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*
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* @see type
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*/
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public function __construct($value, $type = null)
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{
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if ($value instanceof self) {
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$value = $value->getValue();
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}
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$this->value = $value;
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$this->type = $type;
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}
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/**
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* @return mixed
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* @see value
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*/
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public function getValue()
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{
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return $this->value;
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}
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/**
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* @return null|string the type of JSON
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* @see type
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*/
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public function getType()
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{
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return $this->type;
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}
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/**
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* Specify data which should be serialized to JSON
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*
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* @link http://php.net/manual/en/jsonserializable.jsonserialize.php
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* @return mixed data which can be serialized by <b>json_encode</b>,
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* which is a value of any type other than a resource.
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* @since 2.0.14.2
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* @throws InvalidConfigException when JsonExpression contains QueryInterface object
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*/
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public function jsonSerialize()
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{
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$value = $this->getValue();
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if ($value instanceof QueryInterface) {
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throw new InvalidConfigException('The JsonExpression class can not be serialized to JSON when the value is a QueryInterface object');
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}
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return $value;
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}
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}
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