CaseExpression::parse() - Code Metrics - Inspection of "Add parsing of CASE Expressions" - phpmyadmin/sql-parser - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#88)

by Deven

created 2016-09-26 09:04 UTC

CaseExpression::parse() D

↳ Parent: CaseExpression

Complexity

Conditions	33
Paths	22

Size

Total Lines	146
Code Lines	96

Duplication

Lines	32
Ratio	21.92 %

Importance

Changes

Metric	Value
cc	33
eloc	96
nc	22
nop	2
dl	32
loc	146
rs	4.3465
c	0
b	0
f	0

How to fix Long Method Complexity

<?php

/**
 * Parses a reference to a CASE expression
 *
 * @package    SqlParser
 * @subpackage Components
 */
namespace SqlParser\Components;

use SqlParser\Context;
use SqlParser\Component;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;


/**
 * Parses a reference to a CASE expression
 *
 * @category   Components
 * @package    SqlParser
 * @subpackage Components
 * @author     Deven Bansod <[email protected]>
 * @license    http://opensource.org/licenses/GPL-2.0 GNU Public License
 */
class CaseExpression extends Component
{

    /**
     * The value to be compared
     *
     * @var Expression
     */
    public $value;

    /**
     * The conditions in WHEN clauses
     *
     * @var array
     */
    public $conditions;

    /**
     * The results matching with the WHEN clauses
     *
     * @var array
     */
    public $results;

    /**
     * The values to be compared against
     *
     * @var array
     */
    public $compare_values;

    /**
     * The result in ELSE section of expr
     *
     * @var array
     */
    public $else_result;

    /**
     * Constructor.
     *
     */
    public function __construct()
    {
    }

    /**
     *
     * @param Parser     $parser  The parser that serves as context.
     * @param TokensList $list    The list of tokens that are being parsed.
     *
     * @return Expression

     */
    public static function parse(Parser $parser, TokensList $list)
    {
        $ret = new CaseExpression();

        /**
         * State of parser
         *
         * @var int $parser
         */
        $state = 0;

        /**
         * Syntax type (type 0 or type 1)
         *
         * @var int $type
         */
        $type = 0;

        ++$list->idx; // Skip 'CASE'

        for (; $list->idx < $list->count; ++$list->idx) {

            /**
             * Token parsed at this moment.
             *
             * @var Token $token
             */
            $token = $list->tokens[$list->idx];

            // End of statement.
            if ($token->type === Token::TYPE_DELIMITER) {
                break;
            }

            // Skipping whitespaces and comments.
            if (($token->type === Token::TYPE_WHITESPACE)
                || ($token->type === Token::TYPE_COMMENT)
            ) {
                continue;
            }

            if ($state === 0) {
                if ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'WHEN'
                ) {
                    ++$list->idx; // Skip 'WHEN'
                    $new_condition = Condition::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $type = 1;
                    $state = 1;
                    $ret->conditions[] = $new_condition;
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && $token->value === 'ELSE'
                ) {
                    ++$list->idx; // Skip 'ELSE'
                    $ret->else_result = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $state = 0; // last clause of CASE expression
                } elseif ($token->type === Token::TYPE_KEYWORD
                    && ($token->value === 'END'
                    || $token->value === 'end')
                ) {
                    $state = 3; // end of CASE expression
                    ++$list->idx;
                    break;
                } elseif ($token->type === Token::TYPE_KEYWORD) {
                    $parser->error(__('Unexpected keyword.'), $token);

                    break;
                } else {
                    $ret->value = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                    $type = 0;
                    $state = 1;
                }
            } elseif ($state === 1) {
                if ($type === 0) {
                    if ($token->type === Token::TYPE_KEYWORD
                        && $token->value === 'WHEN'
                    ) {
                        ++$list->idx; // Skip 'WHEN'
                        $new_value = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                        $state = 2;
                        $ret->compare_values[] = $new_value;
                    } elseif ($token->type === Token::TYPE_KEYWORD
                        && $token->value === 'ELSE'
                    ) {
                        ++$list->idx; // Skip 'ELSE'
                        $ret->else_result = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                        $state = 0; // last clause of CASE expression
                    } elseif ($token->type === Token::TYPE_KEYWORD
                        && ($token->value === 'END'
                        || $token->value === 'end')
                    ) {
                        $state = 3; // end of CASE expression
                        ++$list->idx;
                        break;
                    } elseif ($token->type === Token::TYPE_KEYWORD) {
                        $parser->error(__('Unexpected keyword.'), $token);

                        break;
                    } else {
                        $parser->error(__('Unexpected token.'), $token);

                        break;
                    }
                } else {
                    if ($token->type === Token::TYPE_KEYWORD
                        && $token->value === 'THEN'
                    ) {
                        ++$list->idx; // Skip 'THEN'
                        $new_result = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                        $state = 0;
                        $ret->results[] = $new_result;
                    } elseif ($token->type === Token::TYPE_KEYWORD) {
                        $parser->error(__('Unexpected keyword.'), $token);

                        break;
                    } else {
                        $parser->error(__('Unexpected token.'), $token);

                        break;
                    }
                }
            } elseif ($state === 2) {
                if ($type === 0) {
                    if ($token->type === Token::TYPE_KEYWORD
                        && $token->value === 'THEN'
                    ) {
                        ++$list->idx; // Skip 'THEN'
                        $new_result = Expression::parse($parser, $list);
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
                        $ret->results[] = $new_result;
                        $state = 1;
                    } elseif ($token->type === Token::TYPE_KEYWORD) {
                        $parser->error(__('Unexpected keyword.'), $token);

                        break;
                    } else {
                        $parser->error(__('Unexpected token.'), $token);

                        break;
                    }
                }
            }
        }

        if ($state !== 3) {
            $parser->error(

                __('Unexpected end of CASE expression'),
                $list->tokens[$list->idx - 1]
            );
        }

        --$list->idx;
        return $ret;
    }

    /**
     * @param Expression $component The component to be built.
     * @param array      $options   Parameters for building.
     *
     * @return string
     */
    public static function build($component, array $options = array())
    {
        $ret = 'CASE ';
        if (isset($component->value)) {
            // Syntax type 0
            $ret .= $component->value . ' ';

            for (
                $i = 0;
                $i < count($component->compare_values) && $i < count($component->results);

                $i++
            ) {
                $ret .= 'WHEN ' . $component->compare_values[$i] . ' ';
                $ret .= 'THEN ' . $component->results[$i] . ' ';
            }
        } else {
            // Syntax type 1
            for (
                $i = 0;
                $i < count($component->conditions) && $i < count($component->results);

                $i++
            ) {
                $ret .= 'WHEN ' . Condition::build($component->conditions[$i]) . ' ';
                $ret .= 'THEN ' . $component->results[$i] . ' ';
            }
        }
        if (isset($component->else_result)) {
            $ret .= 'ELSE ' . $component->else_result . ' ';

        }
        $ret .= 'END';

        return $ret;
    }
}


1		<?php
2
3		/**
4		* Parses a reference to a CASE expression
5		*
6		* @package SqlParser
7		* @subpackage Components
8		*/
9		namespace SqlParser\Components;
10
11		use SqlParser\Context;
12		use SqlParser\Component;
13		use SqlParser\Parser;
14		use SqlParser\Token;
15		use SqlParser\TokensList;
16
17
18		/**
19		* Parses a reference to a CASE expression
20		*
21		* @category Components
22		* @package SqlParser
23		* @subpackage Components
24		* @author Deven Bansod <[email protected]>
25		* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
26		*/
27		class CaseExpression extends Component
28		{
29
30		/**
31		* The value to be compared
32		*
33		* @var Expression
34		*/
35		public $value;
36
37		/**
38		* The conditions in WHEN clauses
39		*
40		* @var array
41		*/
42		public $conditions;
43
44		/**
45		* The results matching with the WHEN clauses
46		*
47		* @var array
48		*/
49		public $results;
50
51		/**
52		* The values to be compared against
53		*
54		* @var array
55		*/
56		public $compare_values;
57
58		/**
59		* The result in ELSE section of expr
60		*
61		* @var array
62		*/
63		public $else_result;
64
65		/**
66		* Constructor.
67		*
68		*/
69		public function __construct()
70		{
71		}
72
73		/**
74		*
75		* @param Parser $parser The parser that serves as context.
76		* @param TokensList $list The list of tokens that are being parsed.
77		*
78		* @return Expression
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report Should the return type not be `CaseExpression`? This check compares the return type specified in the `@return` annotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch. Loading history...
79		*/
80		public static function parse(Parser $parser, TokensList $list)
81		{
82		$ret = new CaseExpression();
83
84		/**
85		* State of parser
86		*
87		* @var int $parser
88		*/
89		$state = 0;
90
91		/**
92		* Syntax type (type 0 or type 1)
93		*
94		* @var int $type
95		*/
96		$type = 0;
97
98		++$list->idx; // Skip 'CASE'
99
100		for (; $list->idx < $list->count; ++$list->idx) {
101
102		/**
103		* Token parsed at this moment.
104		*
105		* @var Token $token
106		*/
107		$token = $list->tokens[$list->idx];
108
109		// End of statement.
110		if ($token->type === Token::TYPE_DELIMITER) {
111		break;
112		}
113
114		// Skipping whitespaces and comments.
115		if (($token->type === Token::TYPE_WHITESPACE)
116		\|\| ($token->type === Token::TYPE_COMMENT)
117		) {
118		continue;
119		}
120
121		if ($state === 0) {
122		if ($token->type === Token::TYPE_KEYWORD
123		&& $token->value === 'WHEN'
124		) {
125		++$list->idx; // Skip 'WHEN'
126		$new_condition = Condition::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
127		$type = 1;
128		$state = 1;
129		$ret->conditions[] = $new_condition;
130		} elseif ($token->type === Token::TYPE_KEYWORD
131		&& $token->value === 'ELSE'
132		) {
133		++$list->idx; // Skip 'ELSE'
134		$ret->else_result = Expression::parse($parser, $list);
		0 ignored issues – show Documentation Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report It seems like `\SqlParser\Components\Ex...::parse($parser, $list)` of type `object<SqlParser\Components\Expression>` or `null` is incompatible with the declared type `array` of property `$else_result`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history... Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
135		$state = 0; // last clause of CASE expression
136		} elseif ($token->type === Token::TYPE_KEYWORD
137		&& ($token->value === 'END'
138		\|\| $token->value === 'end')
139		) {
140		$state = 3; // end of CASE expression
141		++$list->idx;
142		break;
143		} elseif ($token->type === Token::TYPE_KEYWORD) {
144		$parser->error(__('Unexpected keyword.'), $token);
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
145		break;
146		} else {
147		$ret->value = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
148		$type = 0;
149		$state = 1;
150		}
151		} elseif ($state === 1) {
152		if ($type === 0) {
153		if ($token->type === Token::TYPE_KEYWORD
154		&& $token->value === 'WHEN'
155		) {
156		++$list->idx; // Skip 'WHEN'
157		$new_value = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
158		$state = 2;
159		$ret->compare_values[] = $new_value;
160		} elseif ($token->type === Token::TYPE_KEYWORD
161		&& $token->value === 'ELSE'
162		) {
163		++$list->idx; // Skip 'ELSE'
164		$ret->else_result = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
165		$state = 0; // last clause of CASE expression
166		} elseif ($token->type === Token::TYPE_KEYWORD
167		&& ($token->value === 'END'
168		\|\| $token->value === 'end')
169		) {
170		$state = 3; // end of CASE expression
171		++$list->idx;
172		break;
173		} elseif ($token->type === Token::TYPE_KEYWORD) {
174		$parser->error(__('Unexpected keyword.'), $token);
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
175		break;
176		} else {
177		$parser->error(__('Unexpected token.'), $token);
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
178		break;
179		}
180	View Code Duplication	} else {
181		if ($token->type === Token::TYPE_KEYWORD
182		&& $token->value === 'THEN'
183		) {
184		++$list->idx; // Skip 'THEN'
185		$new_result = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
186		$state = 0;
187		$ret->results[] = $new_result;
188		} elseif ($token->type === Token::TYPE_KEYWORD) {
189		$parser->error(__('Unexpected keyword.'), $token);
		0 ignored issues – show Bug introduced 2016-09-26 10:10 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
190		break;
191		} else {
192		$parser->error(__('Unexpected token.'), $token);
		0 ignored issues – show Bug introduced 2016-09-26 10:10 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
193		break;
194		}
195		}
196		} elseif ($state === 2) {
197	View Code Duplication	if ($type === 0) {
198		if ($token->type === Token::TYPE_KEYWORD
199		&& $token->value === 'THEN'
200		) {
201		++$list->idx; // Skip 'THEN'
202		$new_result = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report `$parser` is of type `integer`, but the function expects a `object<SqlParser\Parser>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
203		$ret->results[] = $new_result;
204		$state = 1;
205		} elseif ($token->type === Token::TYPE_KEYWORD) {
206		$parser->error(__('Unexpected keyword.'), $token);
		0 ignored issues – show Bug introduced 2016-09-26 10:10 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
207		break;
208		} else {
209		$parser->error(__('Unexpected token.'), $token);
		0 ignored issues – show Bug introduced 2016-09-26 10:10 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
210		break;
211		}
212		}
213		}
214		}
215
216		if ($state !== 3) {
217		$parser->error(
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$parser` (of type `integer`). Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects. Loading history...
218		__('Unexpected end of CASE expression'),
219		$list->tokens[$list->idx - 1]
220		);
221		}
222
223		--$list->idx;
224		return $ret;
225		}
226
227		/**
228		* @param Expression $component The component to be built.
229		* @param array $options Parameters for building.
230		*
231		* @return string
232		*/
233		public static function build($component, array $options = array())
234		{
235		$ret = 'CASE ';
236		if (isset($component->value)) {
237		// Syntax type 0
238		$ret .= $component->value . ' ';
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The property `value` does not seem to exist in `SqlParser\Components\Expression`. An attempt at access to an undefined property has been detected. This may either be a typographical error or the property has been renamed but there are still references to its old name. If you really want to allow access to undefined properties, you can define magic methods to allow access. See the php core documentation on Overloading. Loading history...
239	View Code Duplication	for (
240		$i = 0;
241		$i < count($component->compare_values) && $i < count($component->results);
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The property `compare_values` does not seem to exist in `SqlParser\Components\Expression`. An attempt at access to an undefined property has been detected. This may either be a typographical error or the property has been renamed but there are still references to its old name. If you really want to allow access to undefined properties, you can define magic methods to allow access. See the php core documentation on Overloading. Loading history... Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The property `results` does not seem to exist in `SqlParser\Components\Expression`. An attempt at access to an undefined property has been detected. This may either be a typographical error or the property has been renamed but there are still references to its old name. If you really want to allow access to undefined properties, you can define magic methods to allow access. See the php core documentation on Overloading. Loading history...
242		$i++
243		) {
244		$ret .= 'WHEN ' . $component->compare_values[$i] . ' ';
245		$ret .= 'THEN ' . $component->results[$i] . ' ';
246		}
247		} else {
248		// Syntax type 1
249	View Code Duplication	for (
250		$i = 0;
251		$i < count($component->conditions) && $i < count($component->results);
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The property `conditions` does not seem to exist in `SqlParser\Components\Expression`. An attempt at access to an undefined property has been detected. This may either be a typographical error or the property has been renamed but there are still references to its old name. If you really want to allow access to undefined properties, you can define magic methods to allow access. See the php core documentation on Overloading. Loading history...
252		$i++
253		) {
254		$ret .= 'WHEN ' . Condition::build($component->conditions[$i]) . ' ';
255		$ret .= 'THEN ' . $component->results[$i] . ' ';
256		}
257		}
258		if (isset($component->else_result)) {
259		$ret .= 'ELSE ' . $component->else_result . ' ';
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The property `else_result` does not seem to exist in `SqlParser\Components\Expression`. An attempt at access to an undefined property has been detected. This may either be a typographical error or the property has been renamed but there are still references to its old name. If you really want to allow access to undefined properties, you can define magic methods to allow access. See the php core documentation on Overloading. Loading history...
260		}
261		$ret .= 'END';
262
263		return $ret;
264		}
265		}
266

phpmyadmin / sql-parser

Pull Request — master (#88)

CaseExpression::parse() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity

Long Method

Duplication Side-by-Side

Filter issues like