vendor/guzzle/guzzle/src/Guzzle/Service/Description/SchemaValidator.php

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<?php

namespace Guzzle\Service\Description;

use Guzzle\Common\ToArrayInterface;

/**
 * Default parameter validator
 */
class SchemaValidator implements ValidatorInterface
{
    /** @var self Cache instance of the object */
    protected static $instance;

    /** @var bool Whether or not integers are converted to strings when an integer is received for a string input */
    protected $castIntegerToStringType;

    /** @var array Errors encountered while validating */
    protected $errors;

    /**
     * @return self
     * @codeCoverageIgnore
     */
    public static function getInstance()
    {
        if (!self::$instance) {
            self::$instance = new self();
        }

        return self::$instance;
    }

    /**
     * @param bool $castIntegerToStringType Set to true to convert integers into strings when a required type is a
     *                                      string and the input value is an integer. Defaults to true.
     */
    public function __construct($castIntegerToStringType = true)
    {
        $this->castIntegerToStringType = $castIntegerToStringType;
    }

    public function validate(Parameter $param, &$value)
    {
        $this->errors = array();
        $this->recursiveProcess($param, $value);

        if (empty($this->errors)) {
            return true;
        } else {
            sort($this->errors);
            return false;
        }
    }

    /**
     * Get the errors encountered while validating
     *
     * @return array
     */