Paginator::getIterator() - Code Metrics - Inspection of "Bug: #7820 paginator ignores dbal type conversions..." - doctrine/orm - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — 2.6 (#7821)

by Marco

created 2019-09-19 17:52 UTC

Paginator::getIterator() A

↳ Parent: Paginator

Complexity

Conditions	4
Paths	5

Size

Total Lines	44
Code Lines	28

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	27
CRAP Score	4

Importance

Changes

Metric	Value
cc	4
eloc	28
c	0
b	0
f	0
nc	5
nop	0
dl	0
loc	44
rs	9.472
ccs	27
cts	27
cp	1
crap	4

<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\ORM\Tools\Pagination;

use Doctrine\ORM\NoResultException;
use Doctrine\ORM\Query;
use Doctrine\ORM\Query\Parser;
use Doctrine\ORM\Query\ResultSetMapping;
use Doctrine\ORM\QueryBuilder;
use function array_map;

/**
 * The paginator can handle various complex scenarios with DQL.
 *
 * @author Pablo Díez <[email protected]>
 * @author Benjamin Eberlei <[email protected]>
 * @license New BSD
 */
class Paginator implements \Countable, \IteratorAggregate
{
    /**
     * @var Query
     */
    private $query;

    /**
     * @var bool
     */
    private $fetchJoinCollection;

    /**
     * @var bool|null
     */
    private $useOutputWalkers;

    /**
     * @var int
     */
    private $count;

    /**
     * Constructor.
     *
     * @param Query|QueryBuilder $query               A Doctrine ORM query or query builder.
     * @param boolean            $fetchJoinCollection Whether the query joins a collection (true by default).
     */
    public function __construct($query, $fetchJoinCollection = true)
    {
        if ($query instanceof QueryBuilder) {
            $query = $query->getQuery();
        }

        $this->query = $query;
        $this->fetchJoinCollection = (bool) $fetchJoinCollection;
    }

    /**
     * Returns the query.
     *
     * @return Query
     */
    public function getQuery()
    {
        return $this->query;
    }

    /**
     * Returns whether the query joins a collection.
     *
     * @return boolean Whether the query joins a collection.
     */
    public function getFetchJoinCollection()
    {
        return $this->fetchJoinCollection;
    }

    /**
     * Returns whether the paginator will use an output walker.
     *
     * @return bool|null
     */
    public function getUseOutputWalkers()
    {
        return $this->useOutputWalkers;
    }

    /**
     * Sets whether the paginator will use an output walker.
     *
     * @param bool|null $useOutputWalkers
     *
     * @return $this
     */
    public function setUseOutputWalkers($useOutputWalkers)
    {
        $this->useOutputWalkers = $useOutputWalkers;

        return $this;
    }

    /**
     * {@inheritdoc}
     */
    public function count()
    {
        if ($this->count === null) {
            try {
                $this->count = array_sum(array_map('current', $this->getCountQuery()->getScalarResult()));
            } catch (NoResultException $e) {
                $this->count = 0;
            }
        }

        return $this->count;
    }

    /**
     * {@inheritdoc}
     */
    public function getIterator()
    {
        $offset = $this->query->getFirstResult();
        $length = $this->query->getMaxResults();

        if ($this->fetchJoinCollection) {
            $subQuery = $this->cloneQuery($this->query);

            if ($this->useOutputWalker($subQuery)) {
                $subQuery->setHint(Query::HINT_CUSTOM_OUTPUT_WALKER, LimitSubqueryOutputWalker::class);
            } else {
                $this->appendTreeWalker($subQuery, LimitSubqueryWalker::class);
                $this->unbindUnusedQueryParams($subQuery);
            }

            $subQuery->setFirstResult($offset)->setMaxResults($length);

            $foundIdRows = $subQuery->getScalarResult();

            // don't do this for an empty id array
            if ($foundIdRows === []) {
                return new \ArrayIterator([]);
            }

            $whereInQuery = $this->cloneQuery($this->query);
            $ids          = array_map('current', $foundIdRows);

            $this->appendTreeWalker($whereInQuery, WhereInWalker::class);
            $whereInQuery->setHint(WhereInWalker::HINT_PAGINATOR_ID_COUNT, count($ids));
            $whereInQuery->setFirstResult(null)->setMaxResults(null);
            $whereInQuery->setParameter(WhereInWalker::PAGINATOR_ID_ALIAS, $ids);
            $whereInQuery->setCacheable($this->query->isCacheable());

            $result = $whereInQuery->getResult($this->query->getHydrationMode());
        } else {
            $result = $this->cloneQuery($this->query)
                ->setMaxResults($length)
                ->setFirstResult($offset)
                ->setCacheable($this->query->isCacheable())
                ->getResult($this->query->getHydrationMode())
            ;
        }

        return new \ArrayIterator($result);
    }

    /**
     * Clones a query.
     *
     * @param Query $query The query.
     *
     * @return Query The cloned query.
     */
    private function cloneQuery(Query $query)
    {
        /* @var $cloneQuery Query */
        $cloneQuery = clone $query;

        $cloneQuery->setParameters(clone $query->getParameters());
        $cloneQuery->setCacheable(false);

        foreach ($query->getHints() as $name => $value) {
            $cloneQuery->setHint($name, $value);
        }

        return $cloneQuery;
    }

    /**
     * Determines whether to use an output walker for the query.
     *
     * @param Query $query The query.
     *
     * @return bool
     */
    private function useOutputWalker(Query $query)
    {
        if ($this->useOutputWalkers === null) {
            return (bool) $query->getHint(Query::HINT_CUSTOM_OUTPUT_WALKER) === false;
        }

        return $this->useOutputWalkers;
    }

    /**
     * Appends a custom tree walker to the tree walkers hint.
     *
     * @param Query  $query
     * @param string $walkerClass
     */
    private function appendTreeWalker(Query $query, $walkerClass)
    {
        $hints = $query->getHint(Query::HINT_CUSTOM_TREE_WALKERS);

        if ($hints === false) {
            $hints = [];
        }

        $hints[] = $walkerClass;
        $query->setHint(Query::HINT_CUSTOM_TREE_WALKERS, $hints);
    }

    /**
     * Returns Query prepared to count.
     *
     * @return Query
     */
    private function getCountQuery()
    {
        /* @var $countQuery Query */
        $countQuery = $this->cloneQuery($this->query);

        if ( ! $countQuery->hasHint(CountWalker::HINT_DISTINCT)) {
            $countQuery->setHint(CountWalker::HINT_DISTINCT, true);
        }

        if ($this->useOutputWalker($countQuery)) {
            $platform = $countQuery->getEntityManager()->getConnection()->getDatabasePlatform(); // law of demeter win

            $rsm = new ResultSetMapping();
            $rsm->addScalarResult($platform->getSQLResultCasing('dctrn_count'), 'count');

            $countQuery->setHint(Query::HINT_CUSTOM_OUTPUT_WALKER, CountOutputWalker::class);
            $countQuery->setResultSetMapping($rsm);
        } else {
            $this->appendTreeWalker($countQuery, CountWalker::class);
            $this->unbindUnusedQueryParams($countQuery);
        }

        $countQuery->setFirstResult(null)->setMaxResults(null);

        return $countQuery;
    }

    private function unbindUnusedQueryParams(Query $query): void
    {
        $parser            = new Parser($query);
        $parameterMappings = $parser->parse()->getParameterMappings();
        /* @var $parameters \Doctrine\Common\Collections\Collection|\Doctrine\ORM\Query\Parameter[] */
        $parameters        = $query->getParameters();

        foreach ($parameters as $key => $parameter) {
            $parameterName = $parameter->getName();

            if ( ! (isset($parameterMappings[$parameterName]) || array_key_exists($parameterName, $parameterMappings))) {
                unset($parameters[$key]);
            }
        }

        $query->setParameters($parameters);
    }
}


1		<?php
2		/*
3		* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
4		* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
5		* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
6		* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
7		* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
8		* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
9		* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
10		* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
11		* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
12		* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
13		* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
14		*
15		* This software consists of voluntary contributions made by many individuals
16		* and is licensed under the MIT license. For more information, see
17		* <http://www.doctrine-project.org>.
18		*/
19
20		namespace Doctrine\ORM\Tools\Pagination;
21
22		use Doctrine\ORM\NoResultException;
23		use Doctrine\ORM\Query;
24		use Doctrine\ORM\Query\Parser;
25		use Doctrine\ORM\Query\ResultSetMapping;
26		use Doctrine\ORM\QueryBuilder;
27		use function array_map;
28
29		/**
30		* The paginator can handle various complex scenarios with DQL.
31		*
32		* @author Pablo Díez <[email protected]>
33		* @author Benjamin Eberlei <[email protected]>
34		* @license New BSD
35		*/
36		class Paginator implements \Countable, \IteratorAggregate
37		{
38		/**
39		* @var Query
40		*/
41		private $query;
42
43		/**
44		* @var bool
45		*/
46		private $fetchJoinCollection;
47
48		/**
49		* @var bool\|null
50		*/
51		private $useOutputWalkers;
52
53		/**
54		* @var int
55		*/
56		private $count;
57
58		/**
59		* Constructor.
60		*
61		* @param Query\|QueryBuilder $query A Doctrine ORM query or query builder.
62		* @param boolean $fetchJoinCollection Whether the query joins a collection (true by default).
63		*/
64	109	public function __construct($query, $fetchJoinCollection = true)
65		{
66	109	if ($query instanceof QueryBuilder) {
67	1	$query = $query->getQuery();
68		}
69
70	109	$this->query = $query;
71	109	$this->fetchJoinCollection = (bool) $fetchJoinCollection;
72	109	}
73
74		/**
75		* Returns the query.
76		*
77		* @return Query
78		*/
79		public function getQuery()
80		{
81		return $this->query;
82		}
83
84		/**
85		* Returns whether the query joins a collection.
86		*
87		* @return boolean Whether the query joins a collection.
88		*/
89		public function getFetchJoinCollection()
90		{
91		return $this->fetchJoinCollection;
92		}
93
94		/**
95		* Returns whether the paginator will use an output walker.
96		*
97		* @return bool\|null
98		*/
99		public function getUseOutputWalkers()
100		{
101		return $this->useOutputWalkers;
102		}
103
104		/**
105		* Sets whether the paginator will use an output walker.
106		*
107		* @param bool\|null $useOutputWalkers
108		*
109		* @return $this
110		*/
111	97	public function setUseOutputWalkers($useOutputWalkers)
112		{
113	97	$this->useOutputWalkers = $useOutputWalkers;
114
115	97	return $this;
116		}
117
118		/**
119		* {@inheritdoc}
120		*/
121	18	public function count()
122		{
123	18	if ($this->count === null) {
124		try {
125	18	$this->count = array_sum(array_map('current', $this->getCountQuery()->getScalarResult()));
126	2	} catch (NoResultException $e) {
127		$this->count = 0;
128		}
129		}
130
131	16	return $this->count;
132		}
133
134		/**
135		* {@inheritdoc}
136		*/
137	96	public function getIterator()
138		{
139	96	$offset = $this->query->getFirstResult();
140	96	$length = $this->query->getMaxResults();
141
142	96	if ($this->fetchJoinCollection) {
143	69	$subQuery = $this->cloneQuery($this->query);
144
145	69	if ($this->useOutputWalker($subQuery)) {
146	42	$subQuery->setHint(Query::HINT_CUSTOM_OUTPUT_WALKER, LimitSubqueryOutputWalker::class);
147		} else {
148	27	$this->appendTreeWalker($subQuery, LimitSubqueryWalker::class);
149	27	$this->unbindUnusedQueryParams($subQuery);
150		}
151
152	66	$subQuery->setFirstResult($offset)->setMaxResults($length);
153
154	66	$foundIdRows = $subQuery->getScalarResult();
155
156		// don't do this for an empty id array
157	66	if ($foundIdRows === []) {
158	2	return new \ArrayIterator([]);
159		}
160
161	65	$whereInQuery = $this->cloneQuery($this->query);
162	65	$ids = array_map('current', $foundIdRows);
163
164	65	$this->appendTreeWalker($whereInQuery, WhereInWalker::class);
165	65	$whereInQuery->setHint(WhereInWalker::HINT_PAGINATOR_ID_COUNT, count($ids));
166	65	$whereInQuery->setFirstResult(null)->setMaxResults(null);
167	65	$whereInQuery->setParameter(WhereInWalker::PAGINATOR_ID_ALIAS, $ids);
168	65	$whereInQuery->setCacheable($this->query->isCacheable());
169
170	65	$result = $whereInQuery->getResult($this->query->getHydrationMode());
171		} else {
172	27	$result = $this->cloneQuery($this->query)
173	27	->setMaxResults($length)
174	27	->setFirstResult($offset)
175	27	->setCacheable($this->query->isCacheable())
176	27	->getResult($this->query->getHydrationMode())
177		;
178		}
179
180	91	return new \ArrayIterator($result);
181		}
182
183		/**
184		* Clones a query.
185		*
186		* @param Query $query The query.
187		*
188		* @return Query The cloned query.
189		*/
190	109	private function cloneQuery(Query $query)
191		{
192		/* @var $cloneQuery Query */
193	109	$cloneQuery = clone $query;
194
195	109	$cloneQuery->setParameters(clone $query->getParameters());
196	109	$cloneQuery->setCacheable(false);
197
198	109	foreach ($query->getHints() as $name => $value) {
199	3	$cloneQuery->setHint($name, $value);
200		}
201
202	109	return $cloneQuery;
203		}
204
205		/**
206		* Determines whether to use an output walker for the query.
207		*
208		* @param Query $query The query.
209		*
210		* @return bool
211		*/
212	83	private function useOutputWalker(Query $query)
213		{
214	83	if ($this->useOutputWalkers === null) {
215	12	return (bool) $query->getHint(Query::HINT_CUSTOM_OUTPUT_WALKER) === false;
216		}
217
218	71	return $this->useOutputWalkers;
219		}
220
221		/**
222		* Appends a custom tree walker to the tree walkers hint.
223		*
224		* @param Query $query
225		* @param string $walkerClass
226		*/
227	76	private function appendTreeWalker(Query $query, $walkerClass)
228		{
229	76	$hints = $query->getHint(Query::HINT_CUSTOM_TREE_WALKERS);
230
231	76	if ($hints === false) {
232	75	$hints = [];
233		}
234
235	76	$hints[] = $walkerClass;
236	76	$query->setHint(Query::HINT_CUSTOM_TREE_WALKERS, $hints);
237	76	}
238
239		/**
240		* Returns Query prepared to count.
241		*
242		* @return Query
243		*/
244	18	private function getCountQuery()
245		{
246		/* @var $countQuery Query */
247	18	$countQuery = $this->cloneQuery($this->query);
248
249	18	if ( ! $countQuery->hasHint(CountWalker::HINT_DISTINCT)) {
250	18	$countQuery->setHint(CountWalker::HINT_DISTINCT, true);
251		}
252
253	18	if ($this->useOutputWalker($countQuery)) {
254	9	$platform = $countQuery->getEntityManager()->getConnection()->getDatabasePlatform(); // law of demeter win
255
256	9	$rsm = new ResultSetMapping();
257	9	$rsm->addScalarResult($platform->getSQLResultCasing('dctrn_count'), 'count');
258
259	9	$countQuery->setHint(Query::HINT_CUSTOM_OUTPUT_WALKER, CountOutputWalker::class);
260	9	$countQuery->setResultSetMapping($rsm);
261		} else {
262	10	$this->appendTreeWalker($countQuery, CountWalker::class);
263	10	$this->unbindUnusedQueryParams($countQuery);
264		}
265
266	16	$countQuery->setFirstResult(null)->setMaxResults(null);
267
268	16	return $countQuery;
269		}
270
271	34	private function unbindUnusedQueryParams(Query $query): void
272		{
273	34	$parser = new Parser($query);
274	34	$parameterMappings = $parser->parse()->getParameterMappings();
275		/* @var $parameters \Doctrine\Common\Collections\Collection\|\Doctrine\ORM\Query\Parameter[] */
276	29	$parameters = $query->getParameters();
277
278	29	foreach ($parameters as $key => $parameter) {
279	4	$parameterName = $parameter->getName();
280
281	4	if ( ! (isset($parameterMappings[$parameterName]) \|\| array_key_exists($parameterName, $parameterMappings))) {
282	4	unset($parameters[$key]);
283		}
284		}
285
286	29	$query->setParameters($parameters);
287	29	}
288		}
289

doctrine / orm

Pull Request — 2.6 (#7821)

Paginator::getIterator() A

Complexity

Size

Duplication

Code Coverage

Importance

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