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<?php
namespace Laminas\Db\Adapter\Driver\Oci8;
use Iterator;
use Laminas\Db\Adapter\Driver\ResultInterface;
use Laminas\Db\Adapter\Exception;
// phpcs:ignore SlevomatCodingStandard.Namespaces.UnusedUses.UnusedUse
use ReturnTypeWillChange;
use function call_user_func;
use function get_resource_type;
use function is_callable;
use function is_int;
use function is_resource;
class Result implements Iterator, ResultInterface
{
/** @var resource */
protected $resource;
/** @var null|int */
protected $rowCount;
/**
* Cursor position
*
* @var int
*/
protected $position = 0;
/**
* Number of known rows
*
* @var int
*/
protected $numberOfRows = -1;
/**
* Is the current() operation already complete for this pointer position?
*
* @var bool
*/
protected $currentComplete = false;
/** @var bool|array */
protected $currentData = false;
/** @var array */
protected $statementBindValues = ['keys' => null, 'values' => []];
/** @var mixed */
protected $generatedValue;
/**
* Initialize
*
* @param resource $resource
* @param null|int $generatedValue
* @param null|int $rowCount
* @return $this Provides a fluent interface
*/
public function initialize($resource, $generatedValue = null, $rowCount = null)
{
if (! is_resource($resource) && get_resource_type($resource) !== 'oci8 statement') {
throw new Exception\InvalidArgumentException('Invalid resource provided.');
}
$this->resource = $resource;
$this->generatedValue = $generatedValue;
$this->rowCount = $rowCount;
return $this;
}
/**
* Force buffering at driver level
*
* Oracle does not support this, to my knowledge (@ralphschindler)
*
* @return null
*/
public function buffer()
{
return null;
}
/**
* Is the result buffered?
*
* @return bool
*/
public function isBuffered()
{
return false;
}
/**
* Return the resource
*
* @return mixed
*/
public function getResource()
{
return $this->resource;
}
/**
* Is query result?
*
* @return bool
*/
public function isQueryResult()
{
return oci_num_fields($this->resource) > 0;
}
/**
* Get affected rows
*
* @return int
*/
public function getAffectedRows()
{
return oci_num_rows($this->resource);
}
/** @return mixed */
#[ReturnTypeWillChange]
public function current()
{
if ($this->currentComplete === false) {
if ($this->loadData() === false) {
return false;
}
}
return $this->currentData;
}
/**
* Load from oci8 result
*
* @return bool
*/
protected function loadData()
{
$this->currentComplete = true;
$this->currentData = oci_fetch_assoc($this->resource);
if ($this->currentData !== false) {
$this->position++;
return true;
}
return false;
}
/** @return void */
#[ReturnTypeWillChange]
public function next()
{
$this->loadData();
}
/** @return int|string */
#[ReturnTypeWillChange]
public function key()
{
return $this->position;
}
/** @return void */
#[ReturnTypeWillChange]
public function rewind()
{
if ($this->position > 0) {
throw new Exception\RuntimeException('Oci8 results cannot be rewound for multiple iterations');
}
}
/** @return bool */
#[ReturnTypeWillChange]
public function valid()
{
if ($this->currentComplete) {
return $this->currentData !== false;
}
return $this->loadData();
}
/** @return int */
#[ReturnTypeWillChange]
public function count()
{
if (is_int($this->rowCount)) {
return $this->rowCount;
}
if (is_callable($this->rowCount)) {
$this->rowCount = (int) call_user_func($this->rowCount);
return $this->rowCount;
}
return 0;
}
/**
* @return int
*/
public function getFieldCount()
{
return oci_num_fields($this->resource);
}
/**
* @todo OCI8 generated value in Driver Result
* @return null
*/
public function getGeneratedValue()
{
return null;
}
}