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<?php
/* ============================================================================
 * Copyright 2020 Zindex Software
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ============================================================================ */

namespace Opis\JsonSchema\KeywordValidators;

use Opis\JsonSchema\{ValidationContext, KeywordValidator};
use Opis\JsonSchema\Errors\ValidationError;

final class CallbackKeywordValidator implements KeywordValidator
{
    /** @var callable */
    private $callback;

/**
     * @param callable $callback
     */
    public function __construct(callable $callback)
    {
        $this->callback = $callback;
    }

/**
     * @inheritDoc
     */
    public function validate(ValidationContext $context): ?ValidationError
    {
        return ($this->callback)($context);
    }

/**
     * @inheritDoc
     */
    public function next(): ?KeywordValidator
    {
        return null;
    }

/**
     * @inheritDoc
     */
    public function setNext(?KeywordValidator $next): KeywordValidator
    {
        return $this;
    }
}