InnerResultIterator::next() - Code Metrics - Inspection of "Merge pull request #156 from homersimpsons/fix/inn..." - thecodingmachine/tdbm - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 65e5fe...b5ff43 )

by David

created 2019-07-31 16:19 UTC

InnerResultIterator::next() C

↳ Parent: InnerResultIterator

Complexity

Conditions	12
Paths	149

Size

Total Lines	74
Code Lines	36

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	36
dl	0
loc	74
rs	6.5583
c	0
b	0
f	0
cc	12
nc	149
nop	0

How to fix Long Method Complexity

<?php
declare(strict_types=1);

namespace TheCodingMachine\TDBM;

use Doctrine\DBAL\Platforms\MySqlPlatform;
use Doctrine\DBAL\Statement;
use Mouf\Database\MagicQuery;
use Psr\Log\LoggerInterface;
use TheCodingMachine\TDBM\Utils\DbalUtils;

/*
 Copyright (C) 2006-2017 David Négrier - THE CODING MACHINE

 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
 the Free Software Foundation; either version 2 of the License, or
 (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

/**
 * Iterator used to retrieve results.
 */
class InnerResultIterator implements \Iterator, \Countable, \ArrayAccess
{
    /**
     * @var Statement
     */
    protected $statement;

    protected $fetchStarted = false;
    private $objectStorage;
    private $className;

    private $tdbmService;
    private $magicSql;
    private $parameters;
    private $limit;
    private $offset;
    private $columnDescriptors;
    private $magicQuery;

    /**
     * The key of the current retrieved object.
     *
     * @var int
     */
    protected $key = -1;

    protected $current = null;

    private $databasePlatform;

    /**
     * @var LoggerInterface
     */
    private $logger;

    /**
     * @param mixed[] $parameters
     * @param array[] $columnDescriptors
     */
    public function __construct(string $magicSql, array $parameters, ?int $limit, ?int $offset, array $columnDescriptors, ObjectStorageInterface $objectStorage, ?string $className, TDBMService $tdbmService, MagicQuery $magicQuery, LoggerInterface $logger)
    {
        $this->magicSql = $magicSql;
        $this->objectStorage = $objectStorage;
        $this->className = $className;
        $this->tdbmService = $tdbmService;
        $this->parameters = $parameters;
        $this->limit = $limit;
        $this->offset = $offset;
        $this->columnDescriptors = $columnDescriptors;
        $this->magicQuery = $magicQuery;
        $this->databasePlatform = $this->tdbmService->getConnection()->getDatabasePlatform();
        $this->logger = $logger;
    }

    private function getQuery(): string
    {
        $sql = $this->magicQuery->buildPreparedStatement($this->magicSql, $this->parameters);
        $sql = $this->tdbmService->getConnection()->getDatabasePlatform()->modifyLimitQuery($sql, $this->limit, $this->offset);
        return $sql;
    }

    protected function executeQuery(): void
    {
        $sql = $this->getQuery();

        $this->logger->debug('Running SQL request: '.$sql);

        $this->statement = $this->tdbmService->getConnection()->executeQuery($sql, $this->parameters, DbalUtils::generateArrayTypes($this->parameters));

        $this->fetchStarted = true;
    }

    private $count = null;
    /**
     * Counts found records (this is the number of records fetched, taking into account the LIMIT and OFFSET settings).
     *
     * @return int
     */
    public function count()
    {
        if ($this->count !== null) {
            return $this->count;
        }

        if ($this->fetchStarted && $this->tdbmService->getConnection()->getDatabasePlatform() instanceof MySqlPlatform) {
            // Optimisation: we don't need a separate "count" SQL request in MySQL.
            $this->count = $this->statement->rowCount();
            return $this->count;
        }
        return $this->getRowCountViaSqlQuery();
    }

    /**
     * Makes a separate SQL query to compute the row count.
     * (not needed in MySQL)
     */
    private function getRowCountViaSqlQuery(): int
    {
        $countSql = 'SELECT COUNT(1) FROM ('.$this->getQuery().') c';

        $this->logger->debug('Running count SQL request: '.$countSql);

        $this->count = (int) $this->tdbmService->getConnection()->fetchColumn($countSql, $this->parameters);
        return $this->count;
    }

    /**
     * Fetches record at current cursor.
     *
     * @return AbstractTDBMObject
     */
    public function current()
    {
        return $this->current;
    }

    /**
     * Returns the current result's key.
     *
     * @return int
     */
    public function key()
    {
        return $this->key;
    }

    /**
     * Advances the cursor to the next result.
     * Casts the database result into one (or several) beans.
     */
    public function next()
    {
        $row = $this->statement->fetch(\PDO::FETCH_ASSOC);
        if ($row) {

            // array<tablegroup, array<table, array<column, value>>>
            $beansData = [];
            foreach ($row as $key => $value) {
                if (!isset($this->columnDescriptors[$key])) {
                    continue;
                }

                $columnDescriptor = $this->columnDescriptors[$key];

                if ($columnDescriptor['tableGroup'] === null) {
                    // A column can have no tableGroup (if it comes from an ORDER BY expression)
                    continue;
                }

                // Let's cast the value according to its type
                $value = $columnDescriptor['type']->convertToPHPValue($value, $this->databasePlatform);

                $beansData[$columnDescriptor['tableGroup']][$columnDescriptor['table']][$columnDescriptor['column']] = $value;
            }

            $reflectionClassCache = [];
            $firstBean = true;
            foreach ($beansData as $beanData) {

                // Let's find the bean class name associated to the bean.

                list($actualClassName, $mainBeanTableName, $tablesUsed) = $this->tdbmService->_getClassNameFromBeanData($beanData);

                if ($this->className !== null) {
                    $actualClassName = $this->className;
                }

                // Let's filter out the beanData that is not used (because it belongs to a part of the hierarchy that is not fetched:
                foreach ($beanData as $tableName => $descriptors) {
                    if (!in_array($tableName, $tablesUsed)) {
                        unset($beanData[$tableName]);
                    }
                }

                // Must we create the bean? Let's see in the cache if we have a mapping DbRow?
                // Let's get the first object mapping a row:
                // We do this loop only for the first table

                $primaryKeys = $this->tdbmService->_getPrimaryKeysFromObjectData($mainBeanTableName, $beanData[$mainBeanTableName]);
                $hash = $this->tdbmService->getObjectHash($primaryKeys);

                $dbRow = $this->objectStorage->get($mainBeanTableName, $hash);
                if ($dbRow !== null) {
                    $bean = $dbRow->getTDBMObject();
                } else {
                    // Let's construct the bean
                    if (!isset($reflectionClassCache[$actualClassName])) {
                        $reflectionClassCache[$actualClassName] = new \ReflectionClass($actualClassName);
                    }
                    // Let's bypass the constructor when creating the bean!
                    $bean = $reflectionClassCache[$actualClassName]->newInstanceWithoutConstructor();
                    $bean->_constructFromData($beanData, $this->tdbmService);
                }

                // The first bean is the one containing the main table.
                if ($firstBean) {
                    $firstBean = false;
                    $this->current = $bean;
                }
            }

            ++$this->key;
        } else {
            $this->current = null;
        }
    }

    /**
     * Moves the cursor to the beginning of the result set.
     */
    public function rewind()
    {
        $this->executeQuery();
        $this->key = -1;
        $this->next();
    }
    /**
     * Checks if the cursor is reading a valid result.
     *
     * @return bool
     */
    public function valid()
    {
        return $this->current !== null;
    }

    /**
     * Whether a offset exists.
     *
     * @link http://php.net/manual/en/arrayaccess.offsetexists.php
     *
     * @param mixed $offset <p>
     *                      An offset to check for.
     *                      </p>
     *
     * @return bool true on success or false on failure.
     *              </p>
     *              <p>
     *              The return value will be casted to boolean if non-boolean was returned
     *
     * @since 5.0.0
     */
    public function offsetExists($offset)
    {
        throw new TDBMInvalidOperationException('You cannot access this result set via index because it was fetched in CURSOR mode. Use ARRAY_MODE instead.');
    }

    /**
     * Offset to retrieve.
     *
     * @link http://php.net/manual/en/arrayaccess.offsetget.php
     *
     * @param mixed $offset <p>
     *                      The offset to retrieve.
     *                      </p>
     *
     * @return mixed Can return all value types
     *
     * @since 5.0.0
     */
    public function offsetGet($offset)
    {
        throw new TDBMInvalidOperationException('You cannot access this result set via index because it was fetched in CURSOR mode. Use ARRAY_MODE instead.');
    }

    /**
     * Offset to set.
     *
     * @link http://php.net/manual/en/arrayaccess.offsetset.php
     *
     * @param mixed $offset <p>
     *                      The offset to assign the value to.
     *                      </p>
     * @param mixed $value  <p>
     *                      The value to set.
     *                      </p>
     *
     * @since 5.0.0
     */
    public function offsetSet($offset, $value)
    {
        throw new TDBMInvalidOperationException('You can set values in a TDBM result set.');
    }

    /**
     * Offset to unset.
     *
     * @link http://php.net/manual/en/arrayaccess.offsetunset.php
     *
     * @param mixed $offset <p>
     *                      The offset to unset.
     *                      </p>
     *
     * @since 5.0.0
     */
    public function offsetUnset($offset)
    {
        throw new TDBMInvalidOperationException('You can unset values in a TDBM result set.');
    }
}


1			<?php
2			declare(strict_types=1);
3
4			namespace TheCodingMachine\TDBM;
5
6			use Doctrine\DBAL\Platforms\MySqlPlatform;
7			use Doctrine\DBAL\Statement;
8			use Mouf\Database\MagicQuery;
9			use Psr\Log\LoggerInterface;
10			use TheCodingMachine\TDBM\Utils\DbalUtils;
11
12			/*
13			Copyright (C) 2006-2017 David Négrier - THE CODING MACHINE
14
15			This program is free software; you can redistribute it and/or modify
16			it under the terms of the GNU General Public License as published by
17			the Free Software Foundation; either version 2 of the License, or
18			(at your option) any later version.
19
20			This program is distributed in the hope that it will be useful,
21			but WITHOUT ANY WARRANTY; without even the implied warranty of
22			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23			GNU General Public License for more details.
24
25			You should have received a copy of the GNU General Public License
26			along with this program; if not, write to the Free Software
27			Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
28			*/
29
30			/**
31			* Iterator used to retrieve results.
32			*/
33			class InnerResultIterator implements \Iterator, \Countable, \ArrayAccess
34			{
35			/**
36			* @var Statement
37			*/
38			protected $statement;
39
40			protected $fetchStarted = false;
41			private $objectStorage;
42			private $className;
43
44			private $tdbmService;
45			private $magicSql;
46			private $parameters;
47			private $limit;
48			private $offset;
49			private $columnDescriptors;
50			private $magicQuery;
51
52			/**
53			* The key of the current retrieved object.
54			*
55			* @var int
56			*/
57			protected $key = -1;
58
59			protected $current = null;
60
61			private $databasePlatform;
62
63			/**
64			* @var LoggerInterface
65			*/
66			private $logger;
67
68			/**
69			* @param mixed[] $parameters
70			* @param array[] $columnDescriptors
71			*/
72			public function __construct(string $magicSql, array $parameters, ?int $limit, ?int $offset, array $columnDescriptors, ObjectStorageInterface $objectStorage, ?string $className, TDBMService $tdbmService, MagicQuery $magicQuery, LoggerInterface $logger)
73			{
74			$this->magicSql = $magicSql;
75			$this->objectStorage = $objectStorage;
76			$this->className = $className;
77			$this->tdbmService = $tdbmService;
78			$this->parameters = $parameters;
79			$this->limit = $limit;
80			$this->offset = $offset;
81			$this->columnDescriptors = $columnDescriptors;
82			$this->magicQuery = $magicQuery;
83			$this->databasePlatform = $this->tdbmService->getConnection()->getDatabasePlatform();
84			$this->logger = $logger;
85			}
86
87			private function getQuery(): string
88			{
89			$sql = $this->magicQuery->buildPreparedStatement($this->magicSql, $this->parameters);
90			$sql = $this->tdbmService->getConnection()->getDatabasePlatform()->modifyLimitQuery($sql, $this->limit, $this->offset);
91			return $sql;
92			}
93
94			protected function executeQuery(): void
95			{
96			$sql = $this->getQuery();
97
98			$this->logger->debug('Running SQL request: '.$sql);
99
100			$this->statement = $this->tdbmService->getConnection()->executeQuery($sql, $this->parameters, DbalUtils::generateArrayTypes($this->parameters));
101
102			$this->fetchStarted = true;
103			}
104
105			private $count = null;
106			/**
107			* Counts found records (this is the number of records fetched, taking into account the LIMIT and OFFSET settings).
108			*
109			* @return int
110			*/
111			public function count()
112			{
113			if ($this->count !== null) {
114			return $this->count;
115			}
116
117			if ($this->fetchStarted && $this->tdbmService->getConnection()->getDatabasePlatform() instanceof MySqlPlatform) {
118			// Optimisation: we don't need a separate "count" SQL request in MySQL.
119			$this->count = $this->statement->rowCount();
120			return $this->count;
121			}
122			return $this->getRowCountViaSqlQuery();
123			}
124
125			/**
126			* Makes a separate SQL query to compute the row count.
127			* (not needed in MySQL)
128			*/
129			private function getRowCountViaSqlQuery(): int
130			{
131			$countSql = 'SELECT COUNT(1) FROM ('.$this->getQuery().') c';
132
133			$this->logger->debug('Running count SQL request: '.$countSql);
134
135			$this->count = (int) $this->tdbmService->getConnection()->fetchColumn($countSql, $this->parameters);
136			return $this->count;
137			}
138
139			/**
140			* Fetches record at current cursor.
141			*
142			* @return AbstractTDBMObject
143			*/
144			public function current()
145			{
146			return $this->current;
147			}
148
149			/**
150			* Returns the current result's key.
151			*
152			* @return int
153			*/
154			public function key()
155			{
156			return $this->key;
157			}
158
159			/**
160			* Advances the cursor to the next result.
161			* Casts the database result into one (or several) beans.
162			*/
163			public function next()
164			{
165			$row = $this->statement->fetch(\PDO::FETCH_ASSOC);
166			if ($row) {
167
168			// array<tablegroup, array<table, array<column, value>>>
169			$beansData = [];
170			foreach ($row as $key => $value) {
171			if (!isset($this->columnDescriptors[$key])) {
172			continue;
173			}
174
175			$columnDescriptor = $this->columnDescriptors[$key];
176
177			if ($columnDescriptor['tableGroup'] === null) {
178			// A column can have no tableGroup (if it comes from an ORDER BY expression)
179			continue;
180			}
181
182			// Let's cast the value according to its type
183			$value = $columnDescriptor['type']->convertToPHPValue($value, $this->databasePlatform);
184
185			$beansData[$columnDescriptor['tableGroup']][$columnDescriptor['table']][$columnDescriptor['column']] = $value;
186			}
187
188			$reflectionClassCache = [];
189			$firstBean = true;
190			foreach ($beansData as $beanData) {
191
192			// Let's find the bean class name associated to the bean.
193
194			list($actualClassName, $mainBeanTableName, $tablesUsed) = $this->tdbmService->_getClassNameFromBeanData($beanData);
195
196			if ($this->className !== null) {
197			$actualClassName = $this->className;
198			}
199
200			// Let's filter out the beanData that is not used (because it belongs to a part of the hierarchy that is not fetched:
201			foreach ($beanData as $tableName => $descriptors) {
202			if (!in_array($tableName, $tablesUsed)) {
203			unset($beanData[$tableName]);
204			}
205			}
206
207			// Must we create the bean? Let's see in the cache if we have a mapping DbRow?
208			// Let's get the first object mapping a row:
209			// We do this loop only for the first table
210
211			$primaryKeys = $this->tdbmService->_getPrimaryKeysFromObjectData($mainBeanTableName, $beanData[$mainBeanTableName]);
212			$hash = $this->tdbmService->getObjectHash($primaryKeys);
213
214			$dbRow = $this->objectStorage->get($mainBeanTableName, $hash);
215			if ($dbRow !== null) {
216			$bean = $dbRow->getTDBMObject();
217			} else {
218			// Let's construct the bean
219			if (!isset($reflectionClassCache[$actualClassName])) {
220			$reflectionClassCache[$actualClassName] = new \ReflectionClass($actualClassName);
221			}
222			// Let's bypass the constructor when creating the bean!
223			$bean = $reflectionClassCache[$actualClassName]->newInstanceWithoutConstructor();
224			$bean->_constructFromData($beanData, $this->tdbmService);
225			}
226
227			// The first bean is the one containing the main table.
228			if ($firstBean) {
229			$firstBean = false;
230			$this->current = $bean;
231			}
232			}
233
234			++$this->key;
235			} else {
236			$this->current = null;
237			}
238			}
239
240			/**
241			* Moves the cursor to the beginning of the result set.
242			*/
243			public function rewind()
244			{
245			$this->executeQuery();
246			$this->key = -1;
247			$this->next();
248			}
249			/**
250			* Checks if the cursor is reading a valid result.
251			*
252			* @return bool
253			*/
254			public function valid()
255			{
256			return $this->current !== null;
257			}
258
259			/**
260			* Whether a offset exists.
261			*
262			* @link http://php.net/manual/en/arrayaccess.offsetexists.php
263			*
264			* @param mixed $offset <p>
265			* An offset to check for.
266			* </p>
267			*
268			* @return bool true on success or false on failure.
269			* </p>
270			* <p>
271			* The return value will be casted to boolean if non-boolean was returned
272			*
273			* @since 5.0.0
274			*/
275			public function offsetExists($offset)
276			{
277			throw new TDBMInvalidOperationException('You cannot access this result set via index because it was fetched in CURSOR mode. Use ARRAY_MODE instead.');
278			}
279
280			/**
281			* Offset to retrieve.
282			*
283			* @link http://php.net/manual/en/arrayaccess.offsetget.php
284			*
285			* @param mixed $offset <p>
286			* The offset to retrieve.
287			* </p>
288			*
289			* @return mixed Can return all value types
290			*
291			* @since 5.0.0
292			*/
293			public function offsetGet($offset)
294			{
295			throw new TDBMInvalidOperationException('You cannot access this result set via index because it was fetched in CURSOR mode. Use ARRAY_MODE instead.');
296			}
297
298			/**
299			* Offset to set.
300			*
301			* @link http://php.net/manual/en/arrayaccess.offsetset.php
302			*
303			* @param mixed $offset <p>
304			* The offset to assign the value to.
305			* </p>
306			* @param mixed $value <p>
307			* The value to set.
308			* </p>
309			*
310			* @since 5.0.0
311			*/
312			public function offsetSet($offset, $value)
313			{
314			throw new TDBMInvalidOperationException('You can set values in a TDBM result set.');
315			}
316
317			/**
318			* Offset to unset.
319			*
320			* @link http://php.net/manual/en/arrayaccess.offsetunset.php
321			*
322			* @param mixed $offset <p>
323			* The offset to unset.
324			* </p>
325			*
326			* @since 5.0.0
327			*/
328			public function offsetUnset($offset)
329			{
330			throw new TDBMInvalidOperationException('You can unset values in a TDBM result set.');
331			}
332			}
333

thecodingmachine / tdbm

Push — master ( 65e5fe...b5ff43 )

InnerResultIterator::next() C

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

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