DB2Statement::getIterator() - Code Metrics - Inspection of "Use proper check in acceptForeignKey()" - doctrine/dbal - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — 2.10.x (#3994)

by Grégoire

created 2020-05-06 21:16 UTC

DB2Statement::getIterator() A

↳ Parent: DB2Statement

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1.037

Importance

Changes

Metric	Value
dl	0
loc	3
ccs	2
cts	3
cp	0.6667
rs	10
c	0
b	0
f	0
cc	1
eloc	1
nc	1
nop	0
crap	1.037

<?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 PDO;
use ReflectionClass;
use ReflectionObject;
use ReflectionProperty;
use stdClass;
use function array_change_key_case;
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_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;

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, $length = null)
    {
        switch ($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()
    {
        return db2_num_fields($this->stmt) ?: 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, $arg2 = null, $arg3 = null)
    {
        $this->defaultFetchMode          = $fetchMode;
        $this->defaultFetchClass         = $arg2 ?: $this->defaultFetchClass;
        $this->defaultFetchClassCtorArgs = $arg3 ? (array) $arg3 : $this->defaultFetchClassCtorArgs;

        return true;
    }

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

    /**
     * {@inheritdoc}
     */
    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}
     */
    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}
     */
    public function fetchColumn($columnIndex = 0)
    {
        $row = $this->fetch(FetchMode::NUMERIC);

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

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

    /**
     * {@inheritdoc}
     */
    public function rowCount()
    {
        return @db2_num_rows($this->stmt) ? : 0;
    }

    /**
     * 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 PDO;
11		use ReflectionClass;
12		use ReflectionObject;
13		use ReflectionProperty;
14		use stdClass;
15		use function array_change_key_case;
16		use function db2_bind_param;
17		use function db2_execute;
18		use function db2_fetch_array;
19		use function db2_fetch_assoc;
20		use function db2_fetch_both;
21		use function db2_fetch_object;
22		use function db2_free_result;
23		use function db2_num_fields;
24		use function db2_num_rows;
25		use function db2_stmt_error;
26		use function db2_stmt_errormsg;
27		use function error_get_last;
28		use function fclose;
29		use function func_get_args;
30		use function func_num_args;
31		use function fwrite;
32		use function gettype;
33		use function is_object;
34		use function is_resource;
35		use function is_string;
36		use function ksort;
37		use function sprintf;
38		use function stream_copy_to_stream;
39		use function stream_get_meta_data;
40		use function strtolower;
41		use function tmpfile;
42		use const CASE_LOWER;
43		use const DB2_BINARY;
44		use const DB2_CHAR;
45		use const DB2_LONG;
46		use const DB2_PARAM_FILE;
47		use const DB2_PARAM_IN;
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 $stmt
83		*/
84	218	public function __construct($stmt)
85		{
86	218	$this->stmt = $stmt;
87	218	}
88
89		/**
90		* {@inheritdoc}
91		*/
92	216	public function bindValue($param, $value, $type = ParameterType::STRING)
93		{
94	216	return $this->bindParam($param, $value, $type);
95		}
96
97		/**
98		* {@inheritdoc}
99		*/
100	216	public function bindParam($column, &$variable, $type = ParameterType::STRING, $length = null)
101		{
102	216	switch ($type) {
103		case ParameterType::INTEGER:
104	216	$this->bind($column, $variable, DB2_PARAM_IN, DB2_LONG);
105	216	break;
106
107		case ParameterType::LARGE_OBJECT:
108	216	if (isset($this->lobs[$column])) {
109		[, $handle] = $this->lobs[$column];
110		fclose($handle);
111		}
112
113	216	$handle = $this->createTemporaryFile();
114	216	$path = stream_get_meta_data($handle)['uri'];
115
116	216	$this->bind($column, $path, DB2_PARAM_FILE, DB2_BINARY);
117
118	216	$this->lobs[$column] = [&$variable, $handle];
119	216	break;
120
121		default:
122	216	$this->bind($column, $variable, DB2_PARAM_IN, DB2_CHAR);
123	216	break;
124		}
125
126	216	return true;
127		}
128
129		/**
130		* @param int $position Parameter position
131		* @param mixed $variable
132		*
133		* @throws DB2Exception
134		*/
135	216	private function bind($position, &$variable, int $parameterType, int $dataType) : void
136		{
137	216	$this->bindParam[$position] =& $variable;
138
139	216	if (! db2_bind_param($this->stmt, $position, 'variable', $parameterType, $dataType)) {
140		throw new DB2Exception(db2_stmt_errormsg());
141		}
142	216	}
143
144		/**
145		* {@inheritdoc}
146		*/
147	122	public function closeCursor()
148		{
149	122	$this->bindParam = [];
150
151	122	if (! db2_free_result($this->stmt)) {
152		return false;
153		}
154
155	122	$this->result = false;
156
157	122	return true;
158		}
159
160		/**
161		* {@inheritdoc}
162		*/
163	122	public function columnCount()
164		{
165	122	return db2_num_fields($this->stmt) ?: 0;
166		}
167
168		/**
169		* {@inheritdoc}
170		*/
171		public function errorCode()
172		{
173		return db2_stmt_error();
174		}
175
176		/**
177		* {@inheritdoc}
178		*/
179		public function errorInfo()
180		{
181		return [
182		db2_stmt_errormsg(),
183		db2_stmt_error(),
184		];
185		}
186
187		/**
188		* {@inheritdoc}
189		*/
190	218	public function execute($params = null)
191		{
192	218	if ($params === null) {
193	218	ksort($this->bindParam);
194
195	218	$params = [];
196
197	218	foreach ($this->bindParam as $column => $value) {
198	216	$params[] = $value;
199		}
200		}
201
202	218	foreach ($this->lobs as [$source, $target]) {
203	216	if (is_resource($source)) {
204	215	$this->copyStreamToStream($source, $target);
205
206	215	continue;
207		}
208
209	216	$this->writeStringToStream($source, $target);
210		}
211
212	218	$retval = db2_execute($this->stmt, $params);
213
214	218	foreach ($this->lobs as [, $handle]) {
215	216	fclose($handle);
216		}
217
218	218	$this->lobs = [];
219
220	218	if ($retval === false) {
221		throw new DB2Exception(db2_stmt_errormsg());
222		}
223
224	218	$this->result = true;
225
226	218	return $retval;
227		}
228
229		/**
230		* {@inheritdoc}
231		*/
232	218	public function setFetchMode($fetchMode, $arg2 = null, $arg3 = null)
233		{
234	218	$this->defaultFetchMode = $fetchMode;
235	218	$this->defaultFetchClass = $arg2 ?: $this->defaultFetchClass;
236	218	$this->defaultFetchClassCtorArgs = $arg3 ? (array) $arg3 : $this->defaultFetchClassCtorArgs;
237
238	218	return true;
239		}
240
241		/**
242		* {@inheritdoc}
243		*/
244	218	public function getIterator()
245		{
246	218	return new StatementIterator($this);
247		}
248
249		/**
250		* {@inheritdoc}
251		*/
252	218	public function fetch($fetchMode = null, $cursorOrientation = PDO::FETCH_ORI_NEXT, $cursorOffset = 0)
253		{
254		// do not try fetching from the statement if it's not expected to contain result
255		// in order to prevent exceptional situation
256	218	if (! $this->result) {
257	46	return false;
258		}
259
260	218	$fetchMode = $fetchMode ?: $this->defaultFetchMode;
261	218	switch ($fetchMode) {
262		case FetchMode::COLUMN:
263	35	return $this->fetchColumn();
264
265		case FetchMode::MIXED:
266	203	return db2_fetch_both($this->stmt);
267
268		case FetchMode::ASSOCIATIVE:
269	218	return db2_fetch_assoc($this->stmt);
270
271		case FetchMode::CUSTOM_OBJECT:
272	158	$className = $this->defaultFetchClass;
273	158	$ctorArgs = $this->defaultFetchClassCtorArgs;
274
275	158	if (func_num_args() >= 2) {
276	158	$args = func_get_args();
277	158	$className = $args[1];
278	158	$ctorArgs = $args[2] ?? [];
279		}
280
281	158	$result = db2_fetch_object($this->stmt);
282
283	158	if ($result instanceof stdClass) {
284	158	$result = $this->castObject($result, $className, $ctorArgs);
285		}
286
287	158	return $result;
288
289		case FetchMode::NUMERIC:
290	215	return db2_fetch_array($this->stmt);
291
292		case FetchMode::STANDARD_OBJECT:
293	159	return db2_fetch_object($this->stmt);
294
295		default:
296		throw new DB2Exception('Given Fetch-Style ' . $fetchMode . ' is not supported.');
297		}
298		}
299
300		/**
301		* {@inheritdoc}
302		*/
303	218	public function fetchAll($fetchMode = null, $fetchArgument = null, $ctorArgs = null)
304		{
305	218	$rows = [];
306
307	218	switch ($fetchMode) {
308		case FetchMode::CUSTOM_OBJECT:
309	158	while (($row = $this->fetch(...func_get_args())) !== false) {
310	158	$rows[] = $row;
311		}
312
313	158	break;
314
315		case FetchMode::COLUMN:
316	215	while (($row = $this->fetchColumn()) !== false) {
317	215	$rows[] = $row;
318		}
319
320	215	break;
321
322		default:
323	218	while (($row = $this->fetch($fetchMode)) !== false) {
324	204	$rows[] = $row;
325		}
326		}
327
328	218	return $rows;
329		}
330
331		/**
332		* {@inheritdoc}
333		*/
334	215	public function fetchColumn($columnIndex = 0)
335		{
336	215	$row = $this->fetch(FetchMode::NUMERIC);
337
338	215	if ($row === false) {
339	215	return false;
340		}
341
342	215	return $row[$columnIndex] ?? null;
343		}
344
345		/**
346		* {@inheritdoc}
347		*/
348	216	public function rowCount()
349		{
350	216	return @db2_num_rows($this->stmt) ? : 0;
351		}
352
353		/**
354		* Casts a stdClass object to the given class name mapping its' properties.
355		*
356		* @param stdClass $sourceObject Object to cast from.
357		* @param string\|object $destinationClass Name of the class or class instance to cast to.
358		* @param mixed[] $ctorArgs Arguments to use for constructing the destination class instance.
359		*
360		* @return object
361		*
362		* @throws DB2Exception
363		*/
364	158	private function castObject(stdClass $sourceObject, $destinationClass, array $ctorArgs = [])
365		{
366	158	if (! is_string($destinationClass)) {
367		if (! is_object($destinationClass)) {
368		throw new DB2Exception(sprintf(
369		'Destination class has to be of type string or object, %s given.',
370		gettype($destinationClass)
371		));
372		}
373		} else {
374	158	$destinationClass = new ReflectionClass($destinationClass);
375	158	$destinationClass = $destinationClass->newInstanceArgs($ctorArgs);
376		}
377
378	158	$sourceReflection = new ReflectionObject($sourceObject);
379	158	$destinationClassReflection = new ReflectionObject($destinationClass);
380		/** @var ReflectionProperty[] $destinationProperties */
381	158	$destinationProperties = array_change_key_case($destinationClassReflection->getProperties(), CASE_LOWER);
382
383	158	foreach ($sourceReflection->getProperties() as $sourceProperty) {
384	158	$sourceProperty->setAccessible(true);
385
386	158	$name = $sourceProperty->getName();
387	158	$value = $sourceProperty->getValue($sourceObject);
388
389		// Try to find a case-matching property.
390	158	if ($destinationClassReflection->hasProperty($name)) {
391		$destinationProperty = $destinationClassReflection->getProperty($name);
392
393		$destinationProperty->setAccessible(true);
394		$destinationProperty->setValue($destinationClass, $value);
395
396		continue;
397		}
398
399	158	$name = strtolower($name);
400
401		// Try to find a property without matching case.
402		// Fallback for the driver returning either all uppercase or all lowercase column names.
403	158	if (isset($destinationProperties[$name])) {
404		$destinationProperty = $destinationProperties[$name];
405
406		$destinationProperty->setAccessible(true);
407		$destinationProperty->setValue($destinationClass, $value);
408
409		continue;
410		}
411
412	158	$destinationClass->$name = $value;
413		}
414
415	158	return $destinationClass;
416		}
417
418		/**
419		* @return resource
420		*
421		* @throws DB2Exception
422		*/
423	216	private function createTemporaryFile()
424		{
425	216	$handle = @tmpfile();
426
427	216	if ($handle === false) {
428		throw new DB2Exception('Could not create temporary file: ' . error_get_last()['message']);
429		}
430
431	216	return $handle;
432		}
433
434		/**
435		* @param resource $source
436		* @param resource $target
437		*
438		* @throws DB2Exception
439		*/
440	215	private function copyStreamToStream($source, $target) : void
441		{
442	215	if (@stream_copy_to_stream($source, $target) === false) {
443		throw new DB2Exception('Could not copy source stream to temporary file: ' . error_get_last()['message']);
444		}
445	215	}
446
447		/**
448		* @param resource $target
449		*
450		* @throws DB2Exception
451		*/
452	216	private function writeStringToStream(string $string, $target) : void
453		{
454	216	if (@fwrite($target, $string) === false) {
455		throw new DB2Exception('Could not write string to temporary file: ' . error_get_last()['message']);
456		}
457	216	}
458		}
459

doctrine / dbal

Pull Request — 2.10.x (#3994)

DB2Statement::getIterator() A

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Duplication

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