src/structure/index/LazyIndex.php
<?php
declare(strict_types = 1);
namespace mheinzerling\commons\database\structure\index;
use mheinzerling\commons\database\structure\Table;
class LazyIndex extends Index
{
/**
* @var string
*/
private $tableName;
/**
* @var string[]
*/
private $fieldNames;
public function __construct(string $tableName, array $fieldNames, string $name = null)
{
$this->tableName = $tableName;
$this->fieldNames = $fieldNames;
parent::__construct([], $name);
}
/** @noinspection PhpMissingParentCallCommonInspection */
protected function getGeneratedName(): string
{
return "idx_" . $this->tableName . "_" . implode("_", $this->fieldNames);
}
/**
* @param Table $table
* @return Index
*/
public function toIndex(Table $table): Index
{
$result = [];
foreach ($this->fieldNames as $fieldName) {
$result[$fieldName] = $table->getFields()[$fieldName];
}
$this->setTable($table);
$index = new Index($result, $this->getName());
$index->setTable($table);
return $index;
}
}