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<?php
/**
* Copyright 2016 Google Inc.
*
* 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 Google\Cloud\Core;
use InvalidArgumentException;
/**
* Methods for validating and verifying data
*/
trait ValidateTrait
{
/**
* Check that each member of $input array is of type $type.
*
* @param array $input The input to validate.
* @param string $type The type to check.
* @param callable [optional] An additional check for each element of $input.
* This will be run count($input) times, so use with care.
* @return void
* @throws \InvalidArgumentException
*/
private function validateBatch(
array $input,
$type,
callable $additionalCheck = null
) {
foreach ($input as $element) {
if (!($element instanceof $type)) {
throw new InvalidArgumentException(sprintf(
'Each member of input array must be an instance of %s',
$type
));
}
if ($additionalCheck) {
$additionalCheck($element);
}
}
}
/**
* Check that the given $input array contains each of given $keys.
*
* @param array $input The input to validate.
* @param array $keys A list of keys to verify in $input.
* @return void
* @throws \InvalidArgumentException
*/
private function arrayHasKeys(array $input, array $keys)
{
foreach ($keys as $key) {
if (!array_key_exists($key, $input)) {
throw new \InvalidArgumentException(sprintf(
'Input missing required one or more required keys. Required keys are %s',
implode(', ', $keys)
));
}
}
}
}