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<?php
/**
* Copyright 2018 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\Spanner\Tests;
use Google\Cloud\Spanner\Database;
/**
* Provide a Spanner Read/Query result
*/
trait ResultGeneratorTrait
{
/**
* Yield a ResultSet response.
*
* @param bool $withStats If true, statistics will be included.
* **Defaults to** `false`.
* @param string|null $transaction If set, the value will be included as the
* transaction ID. **Defaults to** `null`.
* @return \Generator
*/
private function resultGenerator($withStats = false, $transaction = null)
{
return $this->yieldRows([
[
'name' => 'ID',
'type' => Database::TYPE_INT64,
'value' => '10'
]
], $withStats, $transaction);
}
/**
* Yield rows with user-specified data.
*
* @param array[] $rows A list of arrays containing `name`, `type` and `value` keys.
* @param bool $withStats If true, statistics will be included.
* **Defaults to** `false`.
* @param string|null $transaction If set, the value will be included as the
* transaction ID. **Defaults to** `null`.
* @return \Generator
*/
private function yieldRows(array $rows, $withStats = false, $transaction = null)
{
$fields = [];
$values = [];
foreach ($rows as $row) {
$fields[] = [
'name' => $row['name'],
'type' => [
'code' => $row['type']
]
];
$values[] = $row['value'];
}
$result = [
'metadata' => [
'rowType' => [
'fields' => $fields
]
],
'values' => $values
];
if ($withStats) {
$result['stats'] = [
'rowCountExact' => 1,
'rowCountLowerBound' => 1
];
}
if ($transaction) {
$result['metadata']['transaction'] = [
'id' => $transaction
];
}
yield $result;
}
/**
* Yield the given array as a generator.
*
* @param array $data The input data
* @return \Generator
*/
private function resultGeneratorData(array $data)
{
yield $data;
}
}