Complex classes like IndexObject 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 IndexObject, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
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| 11 | class IndexObject implements \ArrayAccess  | 
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| 12 | { | 
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| 13 | public const TYPE_DIR = 1;  | 
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| 14 | public const TYPE_FILE = 2;  | 
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| 15 | public const TYPE_LINK = 3;  | 
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| 16 | |||
| 17 | public const CMP_IGNORE_BLOBID = 1;  | 
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| 18 | public const CMP_IGNORE_INODE = 2;  | 
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| 19 | public const CMP_IGNORE_CTIME = 4;  | 
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| 20 | |||
| 21 | |||
| 22 | /**  | 
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| 23 | * @var string  | 
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| 24 | */  | 
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| 25 | protected $relativePath;  | 
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| 26 | |||
| 27 | /**  | 
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| 28 | * @var int  | 
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| 29 | */  | 
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| 30 | protected $type;  | 
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| 31 | |||
| 32 | /**  | 
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| 33 | * @var float  | 
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| 34 | */  | 
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| 35 | protected $mtime;  | 
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| 36 | |||
| 37 | /**  | 
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| 38 | * @var float  | 
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| 39 | */  | 
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| 40 | protected $ctime;  | 
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| 41 | |||
| 42 | /**  | 
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| 43 | * mode & 0777  | 
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| 44 | *  | 
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| 45 | * @var int  | 
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| 46 | */  | 
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| 47 | protected $permissions;  | 
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| 48 | |||
| 49 | /**  | 
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| 50 | * @var int  | 
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| 51 | */  | 
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| 52 | protected $size;  | 
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| 53 | |||
| 54 | /**  | 
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| 55 | * @var int  | 
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| 56 | */  | 
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| 57 | protected $inode;  | 
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| 58 | |||
| 59 | /**  | 
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| 60 | * @var string  | 
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| 61 | */  | 
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| 62 | protected $linkTarget;  | 
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| 63 | |||
| 64 | /**  | 
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| 65 | * Content hashes for file index objects.  | 
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| 66 | *  | 
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| 67 | * @var HashContainer  | 
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| 68 | */  | 
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| 69 | protected $hashes;  | 
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| 70 | |||
| 71 | /**  | 
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| 72 | * @var string  | 
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| 73 | */  | 
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| 74 | protected $blobId;  | 
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| 75 | |||
| 76 | public function __construct(string $relativePath, int $type, float $mtime, ?float $ctime, int $permissions, ?int $size, ?int $inode, ?string $linkTarget, ?string $blobId, ?HashContainer $hashContainer)  | 
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| 95 | |||
| 96 | public function getRelativePath(): string  | 
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| 100 | |||
| 101 | public function getBasename(): string  | 
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| 107 | |||
| 108 | public function getType(): int  | 
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| 112 | |||
| 113 | public function getTypeName(): string  | 
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| 117 | |||
| 118 | public function isDirectory(): bool  | 
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| 122 | |||
| 123 | public function isFile(): bool  | 
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| 127 | |||
| 128 | public function isLink(): bool  | 
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| 132 | |||
| 133 | public function getMtime(): float  | 
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| 137 | |||
| 138 | public function getCtime(): ?float  | 
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| 142 | |||
| 143 | public function setCtime(float $ctime): IndexObject  | 
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| 149 | |||
| 150 | public function getPermissions(): int  | 
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| 154 | |||
| 155 | public function getPermissionsString(): string  | 
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| 159 | |||
| 160 | public function getSize(): ?int  | 
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| 164 | |||
| 165 | public function getInode(): ?int  | 
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| 169 | |||
| 170 | public function getLinkTarget(): ?string  | 
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| 174 | |||
| 175 | public function getHashes(): ?HashContainer  | 
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| 179 | |||
| 180 | public function getBlobId(): ?string  | 
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| 184 | |||
| 185 | public function setBlobId(string $blobId): IndexObject  | 
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| 193 | |||
| 194 | /**  | 
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| 195 | * Equality check with all attributes.  | 
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| 196 | *  | 
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| 197 | * @param IndexObject $other  | 
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| 198 | * @param int $options  | 
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| 199 | * @return bool  | 
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| 200 | */  | 
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| 201 | public function equals(?IndexObject $other, int $options = 0): bool  | 
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| 226 | |||
| 227 | /**  | 
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| 228 | * @inheritdoc  | 
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| 229 | */  | 
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| 230 | public function offsetExists($offset)  | 
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| 234 | |||
| 235 | /**  | 
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| 236 | * @inheritdoc  | 
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| 237 | */  | 
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| 238 | public function offsetGet($offset)  | 
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| 244 | |||
| 245 | /**  | 
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| 246 | * @inheritdoc  | 
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| 247 | */  | 
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| 248 | public function offsetSet($offset, $value)  | 
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| 252 | |||
| 253 | /**  | 
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| 254 | * @inheritdoc  | 
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| 255 | */  | 
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| 256 | public function offsetUnset($offset)  | 
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| 260 | |||
| 261 | public function __clone()  | 
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| 268 | |||
| 269 | public function __toString(): string  | 
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| 299 | |||
| 300 | public static function getTypeNameMap(): array  | 
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| 308 | }  | 
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| 309 |