<?php
/**
* Copyright © Magento, Inc. All rights reserved.
* See COPYING.txt for license details.
*/

namespace Magento\Framework\EntityManager;

use Magento\Framework\App\ResourceConnection;
use Magento\Framework\DB\Sequence\SequenceInterface;

/**
* Class EntityMetadata
*/
class EntityMetadata implements EntityMetadataInterface
{
/**
* @var ResourceConnection
*/
protected $resourceConnection;

/**
* @var string
*/
protected $entityTableName;

/**
* @var null|string
*/
protected $connectionName;

/**
* @var SequenceInterface
*/
protected $sequence;

/**
* @var string
*/
protected $eavEntityType;

/**
* @var string
*/
protected $identifierField;

/**
* @var string[]
*/
protected $entityContext;

/**
* EntityMetadata constructor.
*
* @param ResourceConnection $resourceConnection
* @param string $entityTableName
* @param string $identifierField
* @param SequenceInterface|null $sequence
* @param null $eavEntityType
* @param null $connectionName
* @param array $entityContext
*/
public function __construct(
ResourceConnection $resourceConnection,
$entityTableName,
$identifierField,
SequenceInterface $sequence = null,
$eavEntityType = null,
$connectionName = null,
$entityContext = []
) {
$this->resourceConnection = $resourceConnection;
$this->entityTableName = $entityTableName;
$this->eavEntityType = $eavEntityType;
$this->connectionName = $connectionName;
$this->identifierField = $identifierField;
$this->sequence = $sequence;
$this->entityContext = $entityContext;
}

/**
* @return string
*/
public function getIdentifierField()
{
return $this->identifierField;
}

/**
* @return string
*/
public function getLinkField()
{
$connection = $this->resourceConnection->getConnectionByName($this->getEntityConnectionName());
$indexList = $connection->getIndexList($this->getEntityTable());
return $indexList[$connection->getPrimaryKeyName($this->getEntityTable())]['COLUMNS_LIST'][0];
}

/**
* @return \Magento\Framework\DB\Adapter\AdapterInterface
* @deprecated 100.1.0
*/
public function getEntityConnection()
{
return $this->resourceConnection->getConnectionByName($this->connectionName);
}

/**
* @return string
*/
public function getEntityTable()
{
return $this->resourceConnection->getTableName($this->entityTableName);
}

/**
* @return string
*/
public function getEntityConnectionName()
{
return $this->connectionName;
}

/**
* @return null|string
*/
public function generateIdentifier()
{
$nextIdentifier = null;
if ($this->sequence) {
$nextIdentifier = $this->sequence->getNextValue();
}
return $nextIdentifier;
}

/**
* @return string[]
*/
public function getEntityContext()
{
return $this->entityContext;
}

/**
* @return null|string
*/
public function getEavEntityType()
{
return $this->eavEntityType;
}
}