Complex classes like RowTrait 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 RowTrait, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 12 | trait RowTrait |
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| 13 | { |
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| 14 | /** |
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| 15 | * Returns a recordset of all columns in a table. |
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| 16 | * |
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| 17 | * @param string $table The name of a table |
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| 18 | * @param array $key The associative array holding the key to retrieve |
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| 19 | * |
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| 20 | * @return \PHPPgAdmin\ADORecordSet A recordset |
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| 21 | */ |
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| 22 | public function browseRow($table, $key) |
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| 40 | |||
| 41 | /** |
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| 42 | * Get the fields for uniquely identifying a row in a table. |
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| 43 | * |
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| 44 | * @param string $table The table for which to retrieve the identifier |
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| 45 | * |
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| 46 | * @return array|array<integer,string>|int An array mapping attribute number to attribute name, empty for no identifiers |
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| 47 | */ |
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| 48 | public function getRowIdentifier($table) |
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| 99 | |||
| 100 | /** |
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| 101 | * Adds a new row to a table. |
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| 102 | * |
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| 103 | * @param string $table The table in which to insert |
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| 104 | * @param array $fields Array of given field in values |
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| 105 | * @param array $values Array of new values for the row |
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| 106 | * @param array $nulls An array mapping column => something if it is to be null |
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| 107 | * @param array $format An array of the data type (VALUE or EXPRESSION) |
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| 108 | * @param array $types An array of field types |
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| 109 | * |
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| 110 | * @return int 0 if operation was successful |
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| 111 | */ |
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| 112 | public function insertRow($table, $fields, $values, $nulls, $format, $types) |
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| 147 | |||
| 148 | /** |
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| 149 | * Formats a value or expression for sql purposes. |
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| 150 | * |
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| 151 | * @param string $type The type of the field |
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| 152 | * @param mixed $format VALUE or EXPRESSION |
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| 153 | * @param mixed $value The actual value entered in the field. Can be NULL |
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| 154 | * |
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| 155 | * @return mixed The suitably quoted and escaped value |
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| 156 | */ |
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| 157 | public function formatValue($type, $format, $value) |
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| 208 | |||
| 209 | // View functions |
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| 210 | |||
| 211 | /** |
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| 212 | * Updates a row in a table. |
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| 213 | * |
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| 214 | * @param string $table The table in which to update |
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| 215 | * @param array $vars An array mapping new values for the row |
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| 216 | * @param array $nulls An array mapping column => something if it is to be null |
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| 217 | * @param array $format An array of the data type (VALUE or EXPRESSION) |
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| 218 | * @param array $types An array of field types |
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| 219 | * @param array $keyarr An array mapping column => value to update |
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| 220 | * |
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| 221 | * @return bool|int 0 success |
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| 222 | */ |
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| 223 | public function editRow($table, $vars, $nulls, $format, $types, $keyarr) |
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| 290 | |||
| 291 | /** |
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| 292 | * Delete a row from a table. |
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| 293 | * |
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| 294 | * @param string $table The table from which to delete |
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| 295 | * @param array $key An array mapping column => value to delete |
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| 296 | * @param string $schema the schema of the table |
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| 297 | * |
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| 298 | * @return bool|int 0 success |
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| 299 | */ |
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| 300 | public function deleteRow($table, $key, $schema = '') |
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| 329 | |||
| 330 | abstract public function fieldClean(&$str); |
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| 331 | |||
| 332 | abstract public function beginTransaction(); |
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| 333 | |||
| 334 | abstract public function rollbackTransaction(); |
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| 335 | |||
| 336 | abstract public function endTransaction(); |
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| 337 | |||
| 338 | abstract public function execute($sql); |
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| 339 | |||
| 340 | abstract public function setComment($obj_type, $obj_name, $table, $comment, $basetype = null); |
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| 341 | |||
| 342 | abstract public function selectSet($sql); |
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| 343 | |||
| 344 | abstract public function clean(&$str); |
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| 345 | |||
| 346 | abstract public function phpBool($parameter); |
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| 347 | |||
| 348 | abstract public function hasCreateTableLikeWithConstraints(); |
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| 349 | |||
| 350 | abstract public function hasCreateTableLikeWithIndexes(); |
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| 351 | |||
| 352 | abstract public function hasTablespaces(); |
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| 353 | |||
| 354 | abstract public function delete($table, $conditions, $schema = ''); |
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| 355 | |||
| 356 | abstract public function fieldArrayClean(&$arr); |
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| 357 | |||
| 358 | abstract public function hasCreateFieldWithConstraints(); |
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| 359 | |||
| 360 | abstract public function getAttributeNames($table, $atts); |
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| 361 | |||
| 362 | abstract public function hasObjectID($table); |
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| 363 | } |
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| 364 |
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: