DB2Statement - Code Metrics - Inspection of "Merge pull request #3932 from morozov/phpstan-stri..." - doctrine/dbal - Measure and Improve Code Quality continuously with Scrutinizer

Failed Conditions

Push — 3.0.x ( 66f057...14f5f1 )

by Sergei

created 2020-04-11 00:06 UTC

DB2Statement C

↳ Parent: Project

Complexity

Total Complexity

Size/Duplication

Total Lines	416
Duplicated Lines	0 %

Importance

Changes

Metric	Value
eloc	149
dl	0
loc	416
rs	5.5199
c	0
b	0
f	0
wmc	56

19 Methods

Rating	Name	Size	Complexity
B	execute()	37	7
A	columnCount()	9	2
A	bind()	6	2
A	setFetchMode()	13	3
A	fetchColumn()	9	2
A	bindParam()	29	4
A	rowCount()	3	1
A	closeCursor()	11	2
A	writeStringToStream()	4	2
A	errorCode()	3	1
A	createTemporaryFile()	9	2
B	castObject()	52	6
A	getIterator()	3	1
A	__construct()	3	1
A	bindValue()	3	1
B	fetch()	44	10
A	errorInfo()	5	1
A	fetchAll()	22	6
A	copyStreamToStream()	4	2

How to fix Complexity

<?php

namespace Doctrine\DBAL\Driver\IBMDB2;

use Doctrine\DBAL\Driver\Statement;
use Doctrine\DBAL\Driver\StatementIterator;
use Doctrine\DBAL\FetchMode;
use Doctrine\DBAL\ParameterType;
use IteratorAggregate;
use ReflectionClass;
use ReflectionObject;
use ReflectionProperty;
use stdClass;
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;
use function array_change_key_case;
use function assert;
use function count;
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 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;

class DB2Statement implements IteratorAggregate, Statement
{
    /** @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;

    /**
     * @param resource $stmt
     */
    public function __construct($stmt)
    {
        $this->stmt = $stmt;
    }

    /**
     * {@inheritdoc}
     */
    public function bindValue($param, $value, $type = ParameterType::STRING)
    {
        return $this->bindParam($param, $value, $type);
    }

    /**
     * {@inheritdoc}
     */
    public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null)
    {
        assert(is_int($column));

        switch ($type) {
            case ParameterType::INTEGER:
                $this->bind($column, $variable, DB2_PARAM_IN, DB2_LONG);
                break;

            case ParameterType::LARGE_OBJECT:
                if (isset($this->lobs[$column])) {
                    [, $handle] = $this->lobs[$column];
                    fclose($handle);
                }

                $handle = $this->createTemporaryFile();
                $path   = stream_get_meta_data($handle)['uri'];

                $this->bind($column, $path, DB2_PARAM_FILE, DB2_BINARY);

                $this->lobs[$column] = [&$variable, $handle];
                break;

            default:
                $this->bind($column, $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 new DB2Exception(db2_stmt_errormsg());
        }
    }

    /**
     * {@inheritdoc}
     */
    public function closeCursor()
    {
        $this->bindParam = [];

        if (! db2_free_result($this->stmt)) {
            return false;
        }

        $this->result = false;

        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function columnCount()
    {
        $count = db2_num_fields($this->stmt);

        if ($count !== false) {
            return $count;
        }

        return 0;
    }

    /**
     * {@inheritdoc}
     */
    public function errorCode()
    {
        return db2_stmt_error();
    }

    /**
     * {@inheritdoc}
     */
    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 new DB2Exception(db2_stmt_errormsg());
        }

        $this->result = true;

        return $retval;
    }

    /**
     * {@inheritdoc}
     */
    public function setFetchMode($fetchMode, ...$args)
    {
        $this->defaultFetchMode = $fetchMode;

        if (isset($args[0])) {
            $this->defaultFetchClass = $args[0];
        }

        if (isset($args[1])) {
            $this->defaultFetchClassCtorArgs = (array) $args[1];
        }

        return true;
    }

    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        return new StatementIterator($this);
    }

    /**
     * {@inheritdoc}
     */
    public function fetch($fetchMode = null, ...$args)
    {
        // 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 (count($args) > 0) {
                    $className = $args[0];
                    $ctorArgs  = $args[1] ?? [];
                }

                $result = db2_fetch_object($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}
     */
    public function fetchAll($fetchMode = null, ...$args)
    {
        $rows = [];

        switch ($fetchMode) {
            case FetchMode::CUSTOM_OBJECT:
                while (($row = $this->fetch($fetchMode, ...$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}
     */
    public function fetchColumn($columnIndex = 0)
    {
        $row = $this->fetch(FetchMode::NUMERIC);

        if ($row === false) {
            return false;
        }

        return $row[$columnIndex] ?? null;
    }

    /**
     * {@inheritdoc}
     */
    public function rowCount() : int
    {
        return @db2_num_rows($this->stmt);
    }

    /**
     * Casts a stdClass object to the given class name mapping its' properties.
     *
     * @param stdClass      $sourceObject     Object to cast from.
     * @param 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 new DB2Exception('Could not create temporary file: ' . error_get_last()['message']);
        }

        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 new DB2Exception('Could not copy source stream to temporary file: ' . error_get_last()['message']);
        }
    }

    /**
     * @param resource $target
     *
     * @throws DB2Exception
     */
    private function writeStringToStream(string $string, $target) : void
    {
        if (@fwrite($target, $string) === false) {
            throw new DB2Exception('Could not write string to temporary file: ' . error_get_last()['message']);
        }
    }
}


1			<?php
2
3			namespace Doctrine\DBAL\Driver\IBMDB2;
4
5			use Doctrine\DBAL\Driver\Statement;
6			use Doctrine\DBAL\Driver\StatementIterator;
7			use Doctrine\DBAL\FetchMode;
8			use Doctrine\DBAL\ParameterType;
9			use IteratorAggregate;
10			use ReflectionClass;
11			use ReflectionObject;
12			use ReflectionProperty;
13			use stdClass;
14			use const CASE_LOWER;
15			use const DB2_BINARY;
16			use const DB2_CHAR;
17			use const DB2_LONG;
18			use const DB2_PARAM_FILE;
19			use const DB2_PARAM_IN;
20			use function array_change_key_case;
21			use function assert;
22			use function count;
23			use function db2_bind_param;
24			use function db2_execute;
25			use function db2_fetch_array;
26			use function db2_fetch_assoc;
27			use function db2_fetch_both;
28			use function db2_fetch_object;
29			use function db2_free_result;
30			use function db2_num_fields;
31			use function db2_num_rows;
32			use function db2_stmt_error;
33			use function db2_stmt_errormsg;
34			use function error_get_last;
35			use function fclose;
36			use function fwrite;
37			use function gettype;
38			use function is_int;
39			use function is_object;
40			use function is_resource;
41			use function is_string;
42			use function ksort;
43			use function sprintf;
44			use function stream_copy_to_stream;
45			use function stream_get_meta_data;
46			use function strtolower;
47			use function tmpfile;
48
49			class DB2Statement implements IteratorAggregate, Statement
50			{
51			/** @var resource */
52			private $stmt;
53
54			/** @var mixed[] */
55			private $bindParam = [];
56
57			/**
58			* Map of LOB parameter positions to the tuples containing reference to the variable bound to the driver statement
59			* and the temporary file handle bound to the underlying statement
60			*
61			* @var mixed[][]
62			*/
63			private $lobs = [];
64
65			/** @var string Name of the default class to instantiate when fetching class instances. */
66			private $defaultFetchClass = '\stdClass';
67
68			/** @var mixed[] Constructor arguments for the default class to instantiate when fetching class instances. */
69			private $defaultFetchClassCtorArgs = [];
70
71			/** @var int */
72			private $defaultFetchMode = FetchMode::MIXED;
73
74			/**
75			* Indicates whether the statement is in the state when fetching results is possible
76			*
77			* @var bool
78			*/
79			private $result = false;
80
81			/**
82			* @param resource $stmt
83			*/
84			public function __construct($stmt)
85			{
86			$this->stmt = $stmt;
87			}
88
89			/**
90			* {@inheritdoc}
91			*/
92			public function bindValue($param, $value, $type = ParameterType::STRING)
93			{
94			return $this->bindParam($param, $value, $type);
95			}
96
97			/**
98			* {@inheritdoc}
99			*/
100			public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null)
101			{
102			assert(is_int($column));
103
104			switch ($type) {
105			case ParameterType::INTEGER:
106			$this->bind($column, $variable, DB2_PARAM_IN, DB2_LONG);
107			break;
108
109			case ParameterType::LARGE_OBJECT:
110			if (isset($this->lobs[$column])) {
111			[, $handle] = $this->lobs[$column];
112			fclose($handle);
113			}
114
115			$handle = $this->createTemporaryFile();
116			$path = stream_get_meta_data($handle)['uri'];
117
118			$this->bind($column, $path, DB2_PARAM_FILE, DB2_BINARY);
119
120			$this->lobs[$column] = [&$variable, $handle];
121			break;
122
123			default:
124			$this->bind($column, $variable, DB2_PARAM_IN, DB2_CHAR);
125			break;
126			}
127
128			return true;
129			}
130
131			/**
132			* @param int $position Parameter position
133			* @param mixed $variable
134			*
135			* @throws DB2Exception
136			*/
137			private function bind($position, &$variable, int $parameterType, int $dataType) : void
138			{
139			$this->bindParam[$position] =& $variable;
140
141			if (! db2_bind_param($this->stmt, $position, 'variable', $parameterType, $dataType)) {
142			throw new DB2Exception(db2_stmt_errormsg());
143			}
144			}
145
146			/**
147			* {@inheritdoc}
148			*/
149			public function closeCursor()
150			{
151			$this->bindParam = [];
152
153			if (! db2_free_result($this->stmt)) {
154			return false;
155			}
156
157			$this->result = false;
158
159			return true;
160			}
161
162			/**
163			* {@inheritdoc}
164			*/
165			public function columnCount()
166			{
167			$count = db2_num_fields($this->stmt);
168
169			if ($count !== false) {
170			return $count;
171			}
172
173			return 0;
174			}
175
176			/**
177			* {@inheritdoc}
178			*/
179			public function errorCode()
180			{
181			return db2_stmt_error();
182			}
183
184			/**
185			* {@inheritdoc}
186			*/
187			public function errorInfo()
188			{
189			return [
190			db2_stmt_errormsg(),
191			db2_stmt_error(),
192			];
193			}
194
195			/**
196			* {@inheritdoc}
197			*/
198			public function execute($params = null)
199			{
200			if ($params === null) {
201			ksort($this->bindParam);
202
203			$params = [];
204
205			foreach ($this->bindParam as $column => $value) {
206			$params[] = $value;
207			}
208			}
209
210			foreach ($this->lobs as [$source, $target]) {
211			if (is_resource($source)) {
212			$this->copyStreamToStream($source, $target);
213
214			continue;
215			}
216
217			$this->writeStringToStream($source, $target);
218			}
219
220			$retval = db2_execute($this->stmt, $params);
221
222			foreach ($this->lobs as [, $handle]) {
223			fclose($handle);
224			}
225
226			$this->lobs = [];
227
228			if ($retval === false) {
229			throw new DB2Exception(db2_stmt_errormsg());
230			}
231
232			$this->result = true;
233
234			return $retval;
235			}
236
237			/**
238			* {@inheritdoc}
239			*/
240			public function setFetchMode($fetchMode, ...$args)
241			{
242			$this->defaultFetchMode = $fetchMode;
243
244			if (isset($args[0])) {
245			$this->defaultFetchClass = $args[0];
246			}
247
248			if (isset($args[1])) {
249			$this->defaultFetchClassCtorArgs = (array) $args[1];
250			}
251
252			return true;
253			}
254
255			/**
256			* {@inheritdoc}
257			*/
258			public function getIterator()
259			{
260			return new StatementIterator($this);
261			}
262
263			/**
264			* {@inheritdoc}
265			*/
266			public function fetch($fetchMode = null, ...$args)
267			{
268			// do not try fetching from the statement if it's not expected to contain result
269			// in order to prevent exceptional situation
270			if (! $this->result) {
271			return false;
272			}
273
274			$fetchMode = $fetchMode ?? $this->defaultFetchMode;
275			switch ($fetchMode) {
276			case FetchMode::COLUMN:
277			return $this->fetchColumn();
278
279			case FetchMode::MIXED:
280			return db2_fetch_both($this->stmt);
281
282			case FetchMode::ASSOCIATIVE:
283			return db2_fetch_assoc($this->stmt);
284
285			case FetchMode::CUSTOM_OBJECT:
286			$className = $this->defaultFetchClass;
287			$ctorArgs = $this->defaultFetchClassCtorArgs;
288
289			if (count($args) > 0) {
290			$className = $args[0];
291			$ctorArgs = $args[1] ?? [];
292			}
293
294			$result = db2_fetch_object($this->stmt);
295
296			if ($result instanceof stdClass) {
297			$result = $this->castObject($result, $className, $ctorArgs);
298			}
299
300			return $result;
301
302			case FetchMode::NUMERIC:
303			return db2_fetch_array($this->stmt);
304
305			case FetchMode::STANDARD_OBJECT:
306			return db2_fetch_object($this->stmt);
307
308			default:
309			throw new DB2Exception('Given Fetch-Style ' . $fetchMode . ' is not supported.');
310			}
311			}
312
313			/**
314			* {@inheritdoc}
315			*/
316			public function fetchAll($fetchMode = null, ...$args)
317			{
318			$rows = [];
319
320			switch ($fetchMode) {
321			case FetchMode::CUSTOM_OBJECT:
322			while (($row = $this->fetch($fetchMode, ...$args)) !== false) {
323			$rows[] = $row;
324			}
325			break;
326			case FetchMode::COLUMN:
327			while (($row = $this->fetchColumn()) !== false) {
328			$rows[] = $row;
329			}
330			break;
331			default:
332			while (($row = $this->fetch($fetchMode)) !== false) {
333			$rows[] = $row;
334			}
335			}
336
337			return $rows;
338			}
339
340			/**
341			* {@inheritdoc}
342			*/
343			public function fetchColumn($columnIndex = 0)
344			{
345			$row = $this->fetch(FetchMode::NUMERIC);
346
347			if ($row === false) {
348			return false;
349			}
350
351			return $row[$columnIndex] ?? null;
352			}
353
354			/**
355			* {@inheritdoc}
356			*/
357			public function rowCount() : int
358			{
359			return @db2_num_rows($this->stmt);
360			}
361
362			/**
363			* Casts a stdClass object to the given class name mapping its' properties.
364			*
365			* @param stdClass $sourceObject Object to cast from.
366			* @param string\|object $destinationClass Name of the class or class instance to cast to.
367			* @param mixed[] $ctorArgs Arguments to use for constructing the destination class instance.
368			*
369			* @return object
370			*
371			* @throws DB2Exception
372			*/
373			private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = [])
374			{
375			if (! is_string($destinationClass)) {
376			if (! is_object($destinationClass)) {
377			throw new DB2Exception(sprintf(
378			'Destination class has to be of type string or object, %s given.',
379			gettype($destinationClass)
380			));
381			}
382			} else {
383			$destinationClass = new ReflectionClass($destinationClass);
384			$destinationClass = $destinationClass->newInstanceArgs($ctorArgs);
385			}
386
387			$sourceReflection = new ReflectionObject($sourceObject);
388			$destinationClassReflection = new ReflectionObject($destinationClass);
389			/** @var ReflectionProperty[] $destinationProperties */
390			$destinationProperties = array_change_key_case($destinationClassReflection->getProperties(), CASE_LOWER);
391
392			foreach ($sourceReflection->getProperties() as $sourceProperty) {
393			$sourceProperty->setAccessible(true);
394
395			$name = $sourceProperty->getName();
396			$value = $sourceProperty->getValue($sourceObject);
397
398			// Try to find a case-matching property.
399			if ($destinationClassReflection->hasProperty($name)) {
400			$destinationProperty = $destinationClassReflection->getProperty($name);
401
402			$destinationProperty->setAccessible(true);
403			$destinationProperty->setValue($destinationClass, $value);
404
405			continue;
406			}
407
408			$name = strtolower($name);
409
410			// Try to find a property without matching case.
411			// Fallback for the driver returning either all uppercase or all lowercase column names.
412			if (isset($destinationProperties[$name])) {
413			$destinationProperty = $destinationProperties[$name];
414
415			$destinationProperty->setAccessible(true);
416			$destinationProperty->setValue($destinationClass, $value);
417
418			continue;
419			}
420
421			$destinationClass->$name = $value;
422			}
423
424			return $destinationClass;
425			}
426
427			/**
428			* @return resource
429			*
430			* @throws DB2Exception
431			*/
432			private function createTemporaryFile()
433			{
434			$handle = @tmpfile();
435
436			if ($handle === false) {
437			throw new DB2Exception('Could not create temporary file: ' . error_get_last()['message']);
438			}
439
440			return $handle;
441			}
442
443			/**
444			* @param resource $source
445			* @param resource $target
446			*
447			* @throws DB2Exception
448			*/
449			private function copyStreamToStream($source, $target) : void
450			{
451			if (@stream_copy_to_stream($source, $target) === false) {
452			throw new DB2Exception('Could not copy source stream to temporary file: ' . error_get_last()['message']);
453			}
454			}
455
456			/**
457			* @param resource $target
458			*
459			* @throws DB2Exception
460			*/
461			private function writeStringToStream(string $string, $target) : void
462			{
463			if (@fwrite($target, $string) === false) {
464			throw new DB2Exception('Could not write string to temporary file: ' . error_get_last()['message']);
465			}
466			}
467			}
468

doctrine / dbal

Push — 3.0.x ( 66f057...14f5f1 )

DB2Statement C

Complexity

Size/Duplication

Importance

19 Methods

How to fix Complexity

Complex Class

Duplication Side-by-Side

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