ProjectedRelation::defineColumns() - Code Metrics - Inspection of "refactoring to reduce complexity" - ondrej-bouda/ivory - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( dd28ca...b2bdac )

by Ondřej

created 2017-05-24 22:36 UTC

ProjectedRelation::defineColumns() C

↳ Parent: ProjectedRelation

Complexity

Conditions	11
Paths	41

Size

Total Lines	33
Code Lines	23

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	33
rs	5.2653
c	0
b	0
f	0
cc	11
eloc	23
nc	41
nop	2

How to fix Complexity

<?php
namespace Ivory\Relation;

use Ivory\Exception\AmbiguousException;
use Ivory\Exception\InternalException;
use Ivory\Exception\UndefinedColumnException;
use Ivory\Relation\Alg\ITupleEvaluator;

class ProjectedRelation extends ProjectedRelationBase
{
    /** @var array list: either index to the source tuple data to take, or a tuple evaluator */
    private $projectionList;

    public function __construct(IRelation $source, $colDef)
    {
        parent::__construct($source, $this->defineColumns($source, $colDef));
    }

    private function defineColumns(IRelation $source, $colDef)
    {
        $srcCols = $source->getColumns();

        $columns = [];
        $this->projectionList = [];

        foreach ($colDef as $key => $value) {
            $nameSpecified = (filter_var($key, FILTER_VALIDATE_INT) === false || is_object($value));
            $colName = ($nameSpecified ? $key : (isset($srcCols[$value]) ? $srcCols[$value]->getName() : $value));

            if (filter_var($value, FILTER_VALIDATE_INT) !== false) { // column offset
                if (!isset($srcCols[$value])) {
                    throw new UndefinedColumnException($value);
                }
                $columns[] = new Column($this, count($this->projectionList), $colName, $srcCols[$value]->getType());
                $this->projectionList[] = (int)$value;
            } elseif (is_string($value)) { // column name
                $matched = $this->recognizeColsByName($srcCols, $nameSpecified, $key, $value);
                foreach ($matched as $i => $cn) {
                    $columns[] = new Column($this, count($this->projectionList), $cn, $srcCols[$i]->getType());
                    $this->projectionList[] = $i;
                }
            } elseif ($value instanceof ITupleEvaluator || $value instanceof \Closure) {
                $columns[] = new Column($this, $value, $colName, null);
                $this->projectionList[] = $value;
            } else {
                throw new \InvalidArgumentException("Invalid specification of the projection item '$key'");
            }
        }

        return $columns;
    }

    /**
     * @param IColumn[] $srcCols
     * @param bool $nameSpecified
     * @param $key
     * @param string $value
     * @return string[]
     */
    private function recognizeColsByName($srcCols, bool $nameSpecified, $key, string $value)
    {
        if ($value[0] == '/') { // PCRE macro
            $pcre = $value;
            $matchAll = true;
            $repl = ($nameSpecified ? $key : null);
        } else {
            $pcre = self::simpleMacroPatternToPcre($value, $starCnt);
            $matchAll = ($starCnt > 0);
            $repl = ($nameSpecified ? self::simpleMacroReplacementToPcre($key) : null);
        }

        if ($repl === null) {
            $cns = [];
            foreach ($srcCols as $i => $c) {
                $name = $c->getName();
                if ($name !== null) {
                    $cns[$i] = $name;
                }
            }
            $matched = preg_grep($pcre, $cns);
        } else {
            $matched = [];
            foreach ($srcCols as $i => $c) {
                if ($c->getName() !== null) {
                    $newName = preg_replace($pcre, $repl, $c->getName(), 1, $cnt);
                    if ($cnt > 0) {
                        $matched[$i] = $newName;
                    }
                }
            }
        }

        if (!$matched) {

            throw new UndefinedColumnException($value);
        }
        if (!$matchAll && count($matched) > 1) {
            throw new AmbiguousException($value);
        }

        return $matched;
    }

    public function tuple(int $offset = 0): ITuple
    {
        $srcTuple = parent::tuple($offset);

        $data = [];
        foreach ($this->projectionList as $i => $spec) {
            if (is_int($spec)) {
                $data[$i] = $srcTuple[$spec];
            } elseif ($spec instanceof ITupleEvaluator) {
                $data[$i] = $spec->evaluate($srcTuple);
            } elseif ($spec instanceof \Closure) {
                $data[$i] = call_user_func($spec, $srcTuple);
            } else {
                throw new InternalException("The type of projection list item $i is not supported");
            }
        }

        return new Tuple($data, $this->getColNameMap());
    }
}


1			<?php
2			namespace Ivory\Relation;
3
4			use Ivory\Exception\AmbiguousException;
5			use Ivory\Exception\InternalException;
6			use Ivory\Exception\UndefinedColumnException;
7			use Ivory\Relation\Alg\ITupleEvaluator;
8
9			class ProjectedRelation extends ProjectedRelationBase
10			{
11			/** @var array list: either index to the source tuple data to take, or a tuple evaluator */
12			private $projectionList;
13
14			public function __construct(IRelation $source, $colDef)
15			{
16			parent::__construct($source, $this->defineColumns($source, $colDef));
17			}
18
19			private function defineColumns(IRelation $source, $colDef)
20			{
21			$srcCols = $source->getColumns();
22
23			$columns = [];
24			$this->projectionList = [];
25
26			foreach ($colDef as $key => $value) {
27			$nameSpecified = (filter_var($key, FILTER_VALIDATE_INT) === false \|\| is_object($value));
28			$colName = ($nameSpecified ? $key : (isset($srcCols[$value]) ? $srcCols[$value]->getName() : $value));
29
30			if (filter_var($value, FILTER_VALIDATE_INT) !== false) { // column offset
31			if (!isset($srcCols[$value])) {
32			throw new UndefinedColumnException($value);
33			}
34			$columns[] = new Column($this, count($this->projectionList), $colName, $srcCols[$value]->getType());
35			$this->projectionList[] = (int)$value;
36			} elseif (is_string($value)) { // column name
37			$matched = $this->recognizeColsByName($srcCols, $nameSpecified, $key, $value);
38			foreach ($matched as $i => $cn) {
39			$columns[] = new Column($this, count($this->projectionList), $cn, $srcCols[$i]->getType());
40			$this->projectionList[] = $i;
41			}
42			} elseif ($value instanceof ITupleEvaluator \|\| $value instanceof \Closure) {
43			$columns[] = new Column($this, $value, $colName, null);
44			$this->projectionList[] = $value;
45			} else {
46			throw new \InvalidArgumentException("Invalid specification of the projection item '$key'");
47			}
48			}
49
50			return $columns;
51			}
52
53			/**
54			* @param IColumn[] $srcCols
55			* @param bool $nameSpecified
56			* @param $key
57			* @param string $value
58			* @return string[]
59			*/
60			private function recognizeColsByName($srcCols, bool $nameSpecified, $key, string $value)
61			{
62			if ($value[0] == '/') { // PCRE macro
63			$pcre = $value;
64			$matchAll = true;
65			$repl = ($nameSpecified ? $key : null);
66			} else {
67			$pcre = self::simpleMacroPatternToPcre($value, $starCnt);
68			$matchAll = ($starCnt > 0);
69			$repl = ($nameSpecified ? self::simpleMacroReplacementToPcre($key) : null);
70			}
71
72			if ($repl === null) {
73			$cns = [];
74			foreach ($srcCols as $i => $c) {
75			$name = $c->getName();
76			if ($name !== null) {
77			$cns[$i] = $name;
78			}
79			}
80			$matched = preg_grep($pcre, $cns);
81			} else {
82			$matched = [];
83			foreach ($srcCols as $i => $c) {
84			if ($c->getName() !== null) {
85			$newName = preg_replace($pcre, $repl, $c->getName(), 1, $cnt);
86			if ($cnt > 0) {
87			$matched[$i] = $newName;
88			}
89			}
90			}
91			}
92
93			if (!$matched) {
			0 ignored issues – show Bug Best Practice introduced 2017-02-07 21:33 UTC by Report Bug Copy Issue Report The expression `$matched` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
94			throw new UndefinedColumnException($value);
95			}
96			if (!$matchAll && count($matched) > 1) {
97			throw new AmbiguousException($value);
98			}
99
100			return $matched;
101			}
102
103			public function tuple(int $offset = 0): ITuple
104			{
105			$srcTuple = parent::tuple($offset);
106
107			$data = [];
108			foreach ($this->projectionList as $i => $spec) {
109			if (is_int($spec)) {
110			$data[$i] = $srcTuple[$spec];
111			} elseif ($spec instanceof ITupleEvaluator) {
112			$data[$i] = $spec->evaluate($srcTuple);
113			} elseif ($spec instanceof \Closure) {
114			$data[$i] = call_user_func($spec, $srcTuple);
115			} else {
116			throw new InternalException("The type of projection list item $i is not supported");
117			}
118			}
119
120			return new Tuple($data, $this->getColNameMap());
121			}
122			}
123

ondrej-bouda / ivory

Push — master ( dd28ca...b2bdac )

ProjectedRelation::defineColumns() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

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