BurningFlipside /
CommonCode
Complex classes like FilterClause often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use FilterClause, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
||
| 4 | class FilterClause |
||
| 5 | { |
||
| 6 | public $var1; |
||
| 7 | public $var2; |
||
| 8 | public $op; |
||
| 9 | |||
| 10 | /** |
||
| 11 | * Create a filter clause from the string |
||
| 12 | * |
||
| 13 | * @param string $string The filter clause string |
||
| 14 | */ |
||
| 15 | public function __construct($string = false) |
||
| 22 | |||
| 23 | /** |
||
| 24 | * Find the string inside the other string |
||
| 25 | * |
||
| 26 | * @param string $haystack The string to search inside |
||
| 27 | * @param string $needle The string to search for |
||
| 28 | * |
||
| 29 | * @return boolean True if the needle exists in the haystack, false otherwise |
||
| 30 | */ |
||
| 31 | protected static function str_startswith($haystack, $needle) |
||
| 35 | |||
| 36 | /** |
||
| 37 | * Is the specified filter a function? |
||
| 38 | * |
||
| 39 | * @param string $string The filter clause |
||
| 40 | * |
||
| 41 | * @return boolean True if the filter is an operation, false otherwise |
||
| 42 | */ |
||
| 43 | protected function filterIsFunction($string) |
||
| 48 | |||
| 49 | /** |
||
| 50 | * Convert the OData simple op to standard operations |
||
| 51 | * |
||
| 52 | * @param string $op The OData op |
||
| 53 | * |
||
| 54 | * @return string The standard programatic notation |
||
| 55 | */ |
||
| 56 | protected function odataOpToStd($op) |
||
| 57 | { |
||
| 58 | switch($op) |
||
| 59 | { |
||
| 60 | case 'ne': |
||
| 61 | return '!='; |
||
| 62 | case 'eq': |
||
| 63 | return '='; |
||
| 64 | case 'lt': |
||
| 65 | return '<'; |
||
| 66 | case 'le': |
||
| 67 | return '<='; |
||
| 68 | case 'gt': |
||
| 69 | return '>'; |
||
| 70 | case 'ge': |
||
| 71 | return '>='; |
||
| 72 | default: |
||
| 73 | return $op; |
||
| 74 | } |
||
| 75 | } |
||
| 76 | |||
| 77 | /** |
||
| 78 | * Convert the string into an OData Filter |
||
| 79 | * |
||
| 80 | * @param string $string The string to turn into a filter |
||
| 81 | */ |
||
| 82 | protected function process_filter_string($string) |
||
| 83 | { |
||
| 84 | if($this->filterIsFunction($string)) |
||
| 85 | { |
||
| 86 | $this->op = strtok($string, '('); |
||
| 87 | $this->var1 = strtok(','); |
||
| 88 | $this->var2 = trim(strtok(')')); |
||
| 89 | return; |
||
| 90 | } |
||
| 91 | $field = strtok($string, ' '); |
||
| 92 | $op = strtok(' '); |
||
| 93 | $rest = strtok("\0"); |
||
| 94 | $this->var1 = $field; |
||
| 95 | $this->op = $this->odataOpToStd($op); |
||
| 96 | $this->var2 = $rest; |
||
| 97 | } |
||
| 98 | |||
| 99 | public function to_sql_string() |
||
| 112 | |||
| 113 | public function to_ldap_string() |
||
| 131 | |||
| 132 | private function getMongoIndexOfOperator() |
||
| 133 | { |
||
| 148 | |||
| 149 | /** |
||
| 150 | * Convert the standard operations to Mongo operations |
||
| 151 | * |
||
| 152 | * @param string $op The standard op |
||
| 153 | * |
||
| 154 | * @return string The mongo operator |
||
| 155 | */ |
||
| 156 | private function opToMongo($op) |
||
| 174 | |||
| 175 | /** |
||
| 176 | * Convert the right hand side of the filter clause into an Mongo array |
||
| 177 | * |
||
| 178 | * @param string $op The standard operator |
||
| 179 | * @param string $var The second variable in the operator |
||
| 180 | * |
||
| 181 | * @return array An array of mongo operations |
||
| 182 | */ |
||
| 183 | private function getMongoClauseArray($op, $var2) |
||
| 187 | |||
| 188 | public function toMongoFilter() |
||
| 215 | |||
| 216 | public function php_compare($value) |
||
| 234 | } |
||
| 235 |
Loading history...
The break statement is not necessary if it is preceded for example by a return statement:
If you would like to keep this construct to be consistent with other case statements, you can safely mark this issue as a false-positive.