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<?php
namespace Doctrine\DBAL\Driver\IBMDB2;
use Doctrine\DBAL\Driver\FetchUtils;
use Doctrine\DBAL\Driver\IBMDB2\Exception\CannotCopyStreamToStream;
use Doctrine\DBAL\Driver\IBMDB2\Exception\CannotCreateTemporaryFile;
use Doctrine\DBAL\Driver\IBMDB2\Exception\CannotWriteToTemporaryFile;
use Doctrine\DBAL\Driver\IBMDB2\Exception\StatementError;
use Doctrine\DBAL\Driver\Result;
use Doctrine\DBAL\Driver\Statement as StatementInterface;
use Doctrine\DBAL\Driver\StatementIterator;
use Doctrine\DBAL\FetchMode;
use Doctrine\DBAL\ParameterType;
use IteratorAggregate;
use PDO;
use ReflectionClass;
use ReflectionObject;
use ReflectionProperty;
use ReturnTypeWillChange;
use stdClass;
use function array_change_key_case;
use function assert;
use function db2_bind_param;
use function db2_execute;
use function db2_fetch_array;
use function db2_fetch_assoc;
use function db2_fetch_both;
use function db2_fetch_object;
use function db2_free_result;
use function db2_num_fields;
use function db2_num_rows;
use function db2_stmt_error;
use function db2_stmt_errormsg;
use function error_get_last;
use function fclose;
use function func_get_args;
use function func_num_args;
use function fwrite;
use function gettype;
use function is_int;
use function is_object;
use function is_resource;
use function is_string;
use function ksort;
use function sprintf;
use function stream_copy_to_stream;
use function stream_get_meta_data;
use function strtolower;
use function tmpfile;
use const CASE_LOWER;
use const DB2_BINARY;
use const DB2_CHAR;
use const DB2_LONG;
use const DB2_PARAM_FILE;
use const DB2_PARAM_IN;
/**
* @deprecated Use {@link Statement} instead
*/
class DB2Statement implements IteratorAggregate, StatementInterface, Result
{
/** @var resource */
private $stmt;
/** @var mixed[] */
private $bindParam = [];
/**
* Map of LOB parameter positions to the tuples containing reference to the variable bound to the driver statement
* and the temporary file handle bound to the underlying statement
*
* @var mixed[][]
*/
private $lobs = [];
/** @var string Name of the default class to instantiate when fetching class instances. */
private $defaultFetchClass = '\stdClass';
/** @var mixed[] Constructor arguments for the default class to instantiate when fetching class instances. */
private $defaultFetchClassCtorArgs = [];
/** @var int */
private $defaultFetchMode = FetchMode::MIXED;
/**
* Indicates whether the statement is in the state when fetching results is possible
*
* @var bool
*/
private $result = false;
/**
* @internal The statement can be only instantiated by its driver connection.
*
* @param resource $stmt
*/
public function __construct($stmt)
{
$this->stmt = $stmt;
}
/**
* {@inheritdoc}
*/
public function bindValue($param, $value, $type = ParameterType::STRING)
{
assert(is_int($param));
return $this->bindParam($param, $value, $type);
}
/**
* {@inheritdoc}
*/
public function bindParam($param, &$variable, $type = ParameterType::STRING, $length = null)
{
assert(is_int($param));
switch ($type) {
case ParameterType::INTEGER:
$this->bind($param, $variable, DB2_PARAM_IN, DB2_LONG);
break;
case ParameterType::LARGE_OBJECT:
if (isset($this->lobs[$param])) {
[, $handle] = $this->lobs[$param];
fclose($handle);
}
$handle = $this->createTemporaryFile();
$path = stream_get_meta_data($handle)['uri'];
$this->bind($param, $path, DB2_PARAM_FILE, DB2_BINARY);
$this->lobs[$param] = [&$variable, $handle];
break;
default:
$this->bind($param, $variable, DB2_PARAM_IN, DB2_CHAR);
break;
}
return true;
}
/**
* @param int $position Parameter position
* @param mixed $variable
*
* @throws DB2Exception
*/
private function bind($position, &$variable, int $parameterType, int $dataType): void
{
$this->bindParam[$position] =& $variable;
if (! db2_bind_param($this->stmt, $position, 'variable', $parameterType, $dataType)) {
throw StatementError::new($this->stmt);
}
}
/**
* {@inheritdoc}
*
* @deprecated Use free() instead.
*/
public function closeCursor()
{
$this->bindParam = [];
if (! db2_free_result($this->stmt)) {
return false;
}
$this->result = false;
return true;
}
/**
* {@inheritdoc}
*/
public function columnCount()
{
return db2_num_fields($this->stmt) ?: 0;
}
/**
* {@inheritdoc}
*
* @deprecated The error information is available via exceptions.
*/
public function errorCode()
{
return db2_stmt_error();
}
/**
* {@inheritdoc}
*
* @deprecated The error information is available via exceptions.
*/
public function errorInfo()
{
return [
db2_stmt_errormsg(),
db2_stmt_error(),
];
}
/**
* {@inheritdoc}
*/
public function execute($params = null)
{
if ($params === null) {
ksort($this->bindParam);
$params = [];
foreach ($this->bindParam as $column => $value) {
$params[] = $value;
}
}
foreach ($this->lobs as [$source, $target]) {
if (is_resource($source)) {
$this->copyStreamToStream($source, $target);
continue;
}
$this->writeStringToStream($source, $target);
}
$retval = db2_execute($this->stmt, $params);
foreach ($this->lobs as [, $handle]) {
fclose($handle);
}
$this->lobs = [];
if ($retval === false) {
throw StatementError::new($this->stmt);
}
$this->result = true;
return $retval;
}
/**
* {@inheritdoc}
*
* @deprecated Use one of the fetch- or iterate-related methods.
*/
public function setFetchMode($fetchMode, $arg2 = null, $arg3 = null)
{
$this->defaultFetchMode = $fetchMode;
$this->defaultFetchClass = $arg2 ?: $this->defaultFetchClass;
$this->defaultFetchClassCtorArgs = $arg3 ? (array) $arg3 : $this->defaultFetchClassCtorArgs;
return true;
}
/**
* {@inheritdoc}
*
* @deprecated Use iterateNumeric(), iterateAssociative() or iterateColumn() instead.
*/
#[ReturnTypeWillChange]
public function getIterator()
{
return new StatementIterator($this);
}
/**
* {@inheritdoc}
*
* @deprecated Use fetchNumeric(), fetchAssociative() or fetchOne() instead.
*/
public function fetch($fetchMode = null, $cursorOrientation = PDO::FETCH_ORI_NEXT, $cursorOffset = 0)
{
// do not try fetching from the statement if it's not expected to contain result
// in order to prevent exceptional situation
if (! $this->result) {
return false;
}
$fetchMode = $fetchMode ?: $this->defaultFetchMode;
switch ($fetchMode) {
case FetchMode::COLUMN:
return $this->fetchColumn();
case FetchMode::MIXED:
return db2_fetch_both($this->stmt);
case FetchMode::ASSOCIATIVE:
return db2_fetch_assoc($this->stmt);
case FetchMode::CUSTOM_OBJECT:
$className = $this->defaultFetchClass;
$ctorArgs = $this->defaultFetchClassCtorArgs;
if (func_num_args() >= 2) {
$args = func_get_args();
$className = $args[1];
$ctorArgs = $args[2] ?? [];
}
$result = db2_fetch_object($this->stmt);
if ($result instanceof stdClass) {
$result = $this->castObject($result, $className, $ctorArgs);
}
return $result;
case FetchMode::NUMERIC:
return db2_fetch_array($this->stmt);
case FetchMode::STANDARD_OBJECT:
return db2_fetch_object($this->stmt);
default:
throw new DB2Exception('Given Fetch-Style ' . $fetchMode . ' is not supported.');
}
}
/**
* {@inheritdoc}
*
* @deprecated Use fetchAllNumeric(), fetchAllAssociative() or fetchFirstColumn() instead.
*/
public function fetchAll($fetchMode = null, $fetchArgument = null, $ctorArgs = null)
{
$rows = [];
switch ($fetchMode) {
case FetchMode::CUSTOM_OBJECT:
while (($row = $this->fetch(...func_get_args())) !== false) {
$rows[] = $row;
}
break;
case FetchMode::COLUMN:
while (($row = $this->fetchColumn()) !== false) {
$rows[] = $row;
}
break;
default:
while (($row = $this->fetch($fetchMode)) !== false) {
$rows[] = $row;
}
}
return $rows;
}
/**
* {@inheritdoc}
*
* @deprecated Use fetchOne() instead.
*/
public function fetchColumn($columnIndex = 0)
{
$row = $this->fetch(FetchMode::NUMERIC);
if ($row === false) {
return false;
}
return $row[$columnIndex] ?? null;
}
/**
* {@inheritDoc}
*/
public function fetchNumeric()
{
if (! $this->result) {
return false;
}
return db2_fetch_array($this->stmt);
}
/**
* {@inheritdoc}
*/
public function fetchAssociative()
{
// do not try fetching from the statement if it's not expected to contain the result
// in order to prevent exceptional situation
if (! $this->result) {
return false;
}
return db2_fetch_assoc($this->stmt);
}
/**
* {@inheritdoc}
*/
public function fetchOne()
{
return FetchUtils::fetchOne($this);
}
/**
* {@inheritdoc}
*/
public function fetchAllNumeric(): array
{
return FetchUtils::fetchAllNumeric($this);
}
/**
* {@inheritdoc}
*/
public function fetchAllAssociative(): array
{
return FetchUtils::fetchAllAssociative($this);
}
/**
* {@inheritdoc}
*/
public function fetchFirstColumn(): array
{
return FetchUtils::fetchFirstColumn($this);
}
/**
* {@inheritdoc}
*/
public function rowCount()
{
return @db2_num_rows($this->stmt) ? : 0;
}
public function free(): void
{
$this->bindParam = [];
db2_free_result($this->stmt);
$this->result = false;
}
/**
* Casts a stdClass object to the given class name mapping its' properties.
*
* @param stdClass $sourceObject Object to cast from.
* @param class-string|object $destinationClass Name of the class or class instance to cast to.
* @param mixed[] $ctorArgs Arguments to use for constructing the destination class instance.
*
* @return object
*
* @throws DB2Exception
*/
private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = [])
{
if (! is_string($destinationClass)) {
if (! is_object($destinationClass)) {
throw new DB2Exception(sprintf(
'Destination class has to be of type string or object, %s given.',
gettype($destinationClass)
));
}
} else {
$destinationClass = new ReflectionClass($destinationClass);
$destinationClass = $destinationClass->newInstanceArgs($ctorArgs);
}
$sourceReflection = new ReflectionObject($sourceObject);
$destinationClassReflection = new ReflectionObject($destinationClass);
/** @var ReflectionProperty[] $destinationProperties */
$destinationProperties = array_change_key_case($destinationClassReflection->getProperties(), CASE_LOWER);
foreach ($sourceReflection->getProperties() as $sourceProperty) {
$sourceProperty->setAccessible(true);
$name = $sourceProperty->getName();
$value = $sourceProperty->getValue($sourceObject);
// Try to find a case-matching property.
if ($destinationClassReflection->hasProperty($name)) {
$destinationProperty = $destinationClassReflection->getProperty($name);
$destinationProperty->setAccessible(true);
$destinationProperty->setValue($destinationClass, $value);
continue;
}
$name = strtolower($name);
// Try to find a property without matching case.
// Fallback for the driver returning either all uppercase or all lowercase column names.
if (isset($destinationProperties[$name])) {
$destinationProperty = $destinationProperties[$name];
$destinationProperty->setAccessible(true);
$destinationProperty->setValue($destinationClass, $value);
continue;
}
$destinationClass->$name = $value;
}
return $destinationClass;
}
/**
* @return resource
*
* @throws DB2Exception
*/
private function createTemporaryFile()
{
$handle = @tmpfile();
if ($handle === false) {
throw CannotCreateTemporaryFile::new(error_get_last());
}
return $handle;
}
/**
* @param resource $source
* @param resource $target
*
* @throws DB2Exception
*/
private function copyStreamToStream($source, $target): void
{
if (@stream_copy_to_stream($source, $target) === false) {
throw CannotCopyStreamToStream::new(error_get_last());
}
}
/**
* @param resource $target
*
* @throws DB2Exception
*/
private function writeStringToStream(string $string, $target): void
{
if (@fwrite($target, $string) === false) {
throw CannotWriteToTemporaryFile::new(error_get_last());
}
}
}
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