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<?php
/*
* Copyright 2017 Google LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
namespace Google\ApiCore;
/**
* @internal
*/
trait ValidationTrait
{
/**
* @param array $arr Associative array
* @param array $requiredKeys List of keys to check for in $arr
* @return array Returns $arr for fluent use
*/
public static function validate(array $arr, array $requiredKeys)
{
return self::validateImpl($arr, $requiredKeys, true);
}
/**
* @param array $arr Associative array
* @param array $requiredKeys List of keys to check for in $arr
* @return array Returns $arr for fluent use
*/
public static function validateNotNull(array $arr, array $requiredKeys)
{
return self::validateImpl($arr, $requiredKeys, false);
}
private static function validateImpl($arr, $requiredKeys, $allowNull)
{
foreach ($requiredKeys as $requiredKey) {
$valid = array_key_exists($requiredKey, $arr)
&& ($allowNull || !is_null($arr[$requiredKey]));
if (!$valid) {
throw new ValidationException("Missing required argument $requiredKey");
}
}
return $arr;
}
/**
* @param string $filePath
* @throws ValidationException
*/
private static function validateFileExists(string $filePath)
{
if (!file_exists($filePath)) {
throw new ValidationException("Could not find specified file: $filePath");
}
}
}
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