CaseExpression::build() - 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 09:16 UTC

CaseExpression::build() C

↳ Parent: CaseExpression

Complexity

Conditions	7
Paths	8

Size

Total Lines	32
Code Lines	21

Duplication

Lines	16
Ratio	50 %

Importance

Changes

Metric	Value
cc	7
eloc	21
nc	8
nop	2
dl	16
loc	32
rs	6.7272
c	0
b	0
f	0

<?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
 * @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, array $options = array())
    {
        $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		* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
25		*/
26		class CaseExpression extends Component
27		{
28
29		/**
30		* The value to be compared
31		*
32		* @var Expression
33		*/
34		public $value;
35
36		/**
37		* The conditions in WHEN clauses
38		*
39		* @var array
40		*/
41		public $conditions;
42
43		/**
44		* The results matching with the WHEN clauses
45		*
46		* @var array
47		*/
48		public $results;
49
50		/**
51		* The values to be compared against
52		*
53		* @var array
54		*/
55		public $compare_values;
56
57		/**
58		* The result in ELSE section of expr
59		*
60		* @var array
61		*/
62		public $else_result;
63
64		/**
65		* Constructor.
66		*
67		*/
68		public function __construct()
69		{
70		}
71
72		/**
73		*
74		* @param Parser $parser The parser that serves as context.
75		* @param TokensList $list The list of tokens that are being parsed.
76		*
77		* @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...
78		*/
79		public static function parse(Parser $parser, TokensList $list, array $options = array())
80		{
81		$ret = new CaseExpression();
82
83		/**
84		* State of parser
85		*
86		* @var int $parser
87		*/
88		$state = 0;
89
90		/**
91		* Syntax type (type 0 or type 1)
92		*
93		* @var int $type
94		*/
95		$type = 0;
96
97		++$list->idx; // Skip 'CASE'
98
99		for (; $list->idx < $list->count; ++$list->idx) {
100
101		/**
102		* Token parsed at this moment.
103		*
104		* @var Token $token
105		*/
106		$token = $list->tokens[$list->idx];
107
108		// End of statement.
109		if ($token->type === Token::TYPE_DELIMITER) {
110		break;
111		}
112
113		// Skipping whitespaces and comments.
114		if (($token->type === Token::TYPE_WHITESPACE)
115		\|\| ($token->type === Token::TYPE_COMMENT)
116		) {
117		continue;
118		}
119
120		if ($state === 0) {
121		if ($token->type === Token::TYPE_KEYWORD
122		&& $token->value === 'WHEN'
123		) {
124		++$list->idx; // Skip 'WHEN'
125		$new_condition = Condition::parse($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...
126		$type = 1;
127		$state = 1;
128		$ret->conditions[] = $new_condition;
129		} elseif ($token->type === Token::TYPE_KEYWORD
130		&& $token->value === 'ELSE'
131		) {
132		++$list->idx; // Skip 'ELSE'
133		$ret->else_result = Expression::parse($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...
134		$state = 0; // last clause of CASE expression
135		} elseif ($token->type === Token::TYPE_KEYWORD
136		&& ($token->value === 'END'
137		\|\| $token->value === 'end')
138		) {
139		$state = 3; // end of CASE expression
140		++$list->idx;
141		break;
142		} elseif ($token->type === Token::TYPE_KEYWORD) {
143		$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...
144		break;
145		} else {
146		$ret->value = Expression::parse($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...
147		$type = 0;
148		$state = 1;
149		}
150		} elseif ($state === 1) {
151		if ($type === 0) {
152		if ($token->type === Token::TYPE_KEYWORD
153		&& $token->value === 'WHEN'
154		) {
155		++$list->idx; // Skip 'WHEN'
156		$new_value = Expression::parse($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...
157		$state = 2;
158		$ret->compare_values[] = $new_value;
159		} elseif ($token->type === Token::TYPE_KEYWORD
160		&& $token->value === 'ELSE'
161		) {
162		++$list->idx; // Skip 'ELSE'
163		$ret->else_result = Expression::parse($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...
164		$state = 0; // last clause of CASE expression
165		} elseif ($token->type === Token::TYPE_KEYWORD
166		&& ($token->value === 'END'
167		\|\| $token->value === 'end')
168		) {
169		$state = 3; // end of CASE expression
170		++$list->idx;
171		break;
172		} elseif ($token->type === Token::TYPE_KEYWORD) {
173		$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...
174		break;
175		} else {
176		$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...
177		break;
178		}
179	View Code Duplication	} else {
180		if ($token->type === Token::TYPE_KEYWORD
181		&& $token->value === 'THEN'
182		) {
183		++$list->idx; // Skip 'THEN'
184		$new_result = Expression::parse($parser, $list);
		0 ignored issues – show Documentation introduced 2016-09-26 12:20 UTC by Report Bug Copy Issue Report `$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...
185		$state = 0;
186		$ret->results[] = $new_result;
187		} elseif ($token->type === Token::TYPE_KEYWORD) {
188		$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...
189		break;
190		} else {
191		$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...
192		break;
193		}
194		}
195		} elseif ($state === 2) {
196	View Code Duplication	if ($type === 0) {
197		if ($token->type === Token::TYPE_KEYWORD
198		&& $token->value === 'THEN'
199		) {
200		++$list->idx; // Skip 'THEN'
201		$new_result = Expression::parse($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...
202		$ret->results[] = $new_result;
203		$state = 1;
204		} elseif ($token->type === Token::TYPE_KEYWORD) {
205		$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...
206		break;
207		} else {
208		$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...
209		break;
210		}
211		}
212		}
213		}
214
215		if ($state !== 3) {
216		$parser->error(
		0 ignored issues – show Bug introduced 2016-09-25 18:25 UTC by Report Bug Copy Issue Report The method `error` cannot be called on `$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...
217		__('Unexpected end of CASE expression'),
218		$list->tokens[$list->idx - 1]
219		);
220		}
221
222		--$list->idx;
223		return $ret;
224		}
225
226		/**
227		* @param Expression $component The component to be built.
228		* @param array $options Parameters for building.
229		*
230		* @return string
231		*/
232		public static function build($component, array $options = array())
233		{
234		$ret = 'CASE ';
235		if (isset($component->value)) {
236		// Syntax type 0
237		$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...
238	View Code Duplication	for (
239		$i = 0;
240		$i < count($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...
241		$i++
242		) {
243		$ret .= 'WHEN ' . $component->compare_values[$i] . ' ';
244		$ret .= 'THEN ' . $component->results[$i] . ' ';
245		}
246		} else {
247		// Syntax type 1
248	View Code Duplication	for (
249		$i = 0;
250		$i < count($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...
251		$i++
252		) {
253		$ret .= 'WHEN ' . Condition::build($component->conditions[$i]) . ' ';
254		$ret .= 'THEN ' . $component->results[$i] . ' ';
255		}
256		}
257		if (isset($component->else_result)) {
258		$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...
259		}
260		$ret .= 'END';
261
262		return $ret;
263		}
264		}
265

phpmyadmin / sql-parser

Pull Request — master (#88)

CaseExpression::build() C

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like