Class TreeIterator

A Recursive iterator used to flatten nested structures and also exposes all Collection methods

Namespace: Cake\Collection\Iterator

Property Summary

$_mode protected

int

The iteration mode

Method Summary

__construct() public

Constructor
_createMatcherFilter() protected

Returns a callable that receives a value and will return whether or not it matches certain condition.
_extract() protected

Returns a column from $data that can be extracted by iterating over the column names contained in $path. It will return arrays for elements in represented with {*}
_propertyExtractor() protected

Returns a callable that can be used to extract a property or column from an array or object based on a dot separated path.
_simpleExtract() protected

Returns a column from $data that can be extracted by iterating over the column names contained in $path
_unwrap() public deprecated

Backwards compatible wrapper for unwrap()
append() public

{@inheritDoc}
buffered() public

{@inheritDoc}
cartesianProduct() public

{@inheritDoc}
chunk() public

{@inheritDoc}
combine() public

{@inheritDoc}
compile() public

{@inheritDoc}
contains() public

{@inheritDoc}
countBy() public

{@inheritDoc}
each() public

{@inheritDoc}
every() public

{@inheritDoc}
extract() public

{@inheritDoc}
filter() public

{@inheritDoc}
first() public

{@inheritDoc}
firstMatch() public

{@inheritDoc}
groupBy() public

{@inheritDoc}
indexBy() public

{@inheritDoc}
insert() public

{@inheritDoc}
isEmpty() public

{@inheritDoc}
jsonSerialize() public

{@inheritDoc}
last() public

{@inheritDoc}
listNested() public

{@inheritDoc}
map() public

{@inheritDoc}
match() public

{@inheritDoc}
max() public

{@inheritDoc}
min() public

{@inheritDoc}
nest() public

{@inheritDoc}
printer() public

Returns another iterator which will return the values ready to be displayed to a user. It does so by extracting one property from each of the elements and prefixing it with a spacer so that the relative position in the tree can be visualized.
reduce() public

{@inheritDoc}
reject() public

{@inheritDoc}
sample() public

{@inheritDoc}
shuffle() public

{@inheritDoc}
skip() public

{@inheritDoc}
some() public

{@inheritDoc}
sortBy() public

{@inheritDoc}
stopWhen() public

{@inheritDoc}
sumOf() public

{@inheritDoc}
take() public

{@inheritDoc}
through() public

{@inheritDoc}
toArray() public

{@inheritDoc}
toList() public

{@inheritDoc}
transpose() public

{@inheritDoc}
unfold() public

{@inheritDoc}
unwrap() public

{@inheritDoc}
zip() public

{@inheritDoc}
zipWith() public

{@inheritDoc}

Method Detail

__construct() ¶ public

__construct(RecursiveIterator $items, int $mode = RecursiveIteratorIterator::SELF_FIRST, int $flags = 0)

Constructor

Parameters

RecursiveIterator $items: The iterator to flatten.
int $mode optional: Iterator mode.
int $flags optional: Iterator flags.

_createMatcherFilter() ¶ protected

_createMatcherFilter(array $conditions): callable

Returns a callable that receives a value and will return whether or not it matches certain condition.

Parameters

array $conditions: A key-value list of conditions to match where the key is the property path to get from the current item and the value is the value to be compared the item with.

Returns

callable

_extract() ¶ protected

_extract(array|ArrayAccess $data, array $path): mixed

Returns a column from $data that can be extracted by iterating over the column names contained in $path. It will return arrays for elements in represented with {*}

Parameters

array|ArrayAccess $data: Data.
array $path: Path to extract from.

Returns

mixed

_propertyExtractor() ¶ protected

_propertyExtractor(string|callable $callback): callable

Returns a callable that can be used to extract a property or column from an array or object based on a dot separated path.

Parameters

string|callable $callback: A dot separated path of column to follow so that the final one can be returned or a callable that will take care of doing that.

Returns

callable

_simpleExtract() ¶ protected

_simpleExtract(array|ArrayAccess $data, array $path): mixed

Returns a column from $data that can be extracted by iterating over the column names contained in $path

Parameters

array|ArrayAccess $data: Data.
array $path: Path to extract from.

Returns

mixed

_unwrap() ¶ public

_unwrap(): Iterator

Backwards compatible wrapper for unwrap()

Returns

Iterator

append() ¶ public

append(mixed $items)

{@inheritDoc}

Parameters

$items

buffered() ¶ public

buffered(): Cake\Collection\Iterator\BufferedIterator

{@inheritDoc}

Returns

Cake\Collection\Iterator\BufferedIterator

cartesianProduct() ¶ public

cartesianProduct(callable $operation = null, callable $filter = null): Cake\Collection\CollectionInterface

{@inheritDoc}

Parameters

callable $operation optional
callable $filter optional

Returns

Cake\Collection\CollectionInterface

chunk() ¶ public

chunk(mixed $chunkSize)

{@inheritDoc}

Parameters

$chunkSize

combine() ¶ public

combine(mixed $keyPath, mixed $valuePath, mixed $groupPath = null)

{@inheritDoc}

Parameters

$keyPath
$valuePath
$groupPath optional

compile() ¶ public

compile(mixed $preserveKeys = true)

{@inheritDoc}

Parameters

$preserveKeys optional

contains() ¶ public

contains(mixed $value)

{@inheritDoc}

Parameters

$value

countBy() ¶ public

countBy(mixed $callback)

{@inheritDoc}

Parameters

$callback

each() ¶ public

each(callable $c)

{@inheritDoc}

Parameters

callable $c

every() ¶ public

every(callable $c)

{@inheritDoc}

Parameters

callable $c

extract() ¶ public

extract(mixed $matcher)

{@inheritDoc}

Parameters

$matcher

filter() ¶ public

filter(callable $c = null): Cake\Collection\Iterator\FilterIterator

{@inheritDoc}

Parameters

callable $c optional

Returns

Cake\Collection\Iterator\FilterIterator

first() ¶ public

first()

{@inheritDoc}

firstMatch() ¶ public

firstMatch(array $conditions)

{@inheritDoc}

Parameters

array $conditions

groupBy() ¶ public

groupBy(mixed $callback)

{@inheritDoc}

Parameters

$callback

indexBy() ¶ public

indexBy(mixed $callback)

{@inheritDoc}

Parameters

$callback

insert() ¶ public

insert(mixed $path, mixed $values): Cake\Collection\Iterator\InsertIterator

{@inheritDoc}

Parameters

$path
$values

Returns

Cake\Collection\Iterator\InsertIterator

isEmpty() ¶ public

isEmpty()

{@inheritDoc}

jsonSerialize() ¶ public

jsonSerialize()

{@inheritDoc}

last() ¶ public

last()

{@inheritDoc}

listNested() ¶ public

listNested(mixed $dir = 'desc', mixed $nestingKey = 'children'): Cake\Collection\Iterator\TreeIterator

{@inheritDoc}

Parameters

$dir optional
$nestingKey optional

Returns

Cake\Collection\Iterator\TreeIterator

map() ¶ public

map(callable $c): Cake\Collection\Iterator\ReplaceIterator

{@inheritDoc}

Parameters

callable $c

Returns

Cake\Collection\Iterator\ReplaceIterator

match() ¶ public

match(array $conditions)

{@inheritDoc}

Parameters

array $conditions

max() ¶ public

max(mixed $callback, mixed $type = SORT_NUMERIC)

{@inheritDoc}

Parameters

$callback
$type optional

min() ¶ public

min(mixed $callback, mixed $type = SORT_NUMERIC)

{@inheritDoc}

Parameters

$callback
$type optional

nest() ¶ public

nest(mixed $idPath, mixed $parentPath, mixed $nestingKey = 'children')

{@inheritDoc}

Parameters

$idPath
$parentPath
$nestingKey optional

printer() ¶ public

printer(string|callable $valuePath, string|callable|null $keyPath = null, string $spacer = '__'): Cake\Collection\Iterator\TreePrinter

Returns another iterator which will return the values ready to be displayed to a user. It does so by extracting one property from each of the elements and prefixing it with a spacer so that the relative position in the tree can be visualized.

Both $valuePath and $keyPath can be a string with a property name to extract or a dot separated path of properties that should be followed to get the last one in the path.

Alternatively, $valuePath and $keyPath can be callable functions. They will get the current element as first parameter, the current iteration key as second parameter, and the iterator instance as third argument.

Example

 $printer = (new Collection($treeStructure))->listNested()->printer('name');

Using a closure:

 $printer = (new Collection($treeStructure))
     ->listNested()
     ->printer(function ($item, $key, $iterator) {
         return $item->name;
     });

Parameters

string|callable $valuePath: The property to extract or a callable to return the display value
string|callable|null $keyPath optional: The property to use as iteration key or a callable returning the key value.
string $spacer optional: The string to use for prefixing the values according to their depth in the tree

Returns

Cake\Collection\Iterator\TreePrinter

reduce() ¶ public

reduce(callable $c, mixed $zero = null)

{@inheritDoc}

Parameters

callable $c
$zero optional

reject() ¶ public

reject(callable $c): Cake\Collection\Iterator\FilterIterator

{@inheritDoc}

Parameters

callable $c

Returns

Cake\Collection\Iterator\FilterIterator

sample() ¶ public

sample(mixed $size = 10)

{@inheritDoc}

Parameters

$size optional

shuffle() ¶ public

shuffle()

{@inheritDoc}

skip() ¶ public

skip(mixed $howMany)

{@inheritDoc}

Parameters

$howMany

some() ¶ public

some(callable $c)

{@inheritDoc}

Parameters

callable $c

sortBy() ¶ public

sortBy(mixed $callback, mixed $dir = SORT_DESC, mixed $type = SORT_NUMERIC)

{@inheritDoc}

Parameters

$callback
$dir optional
$type optional

stopWhen() ¶ public

stopWhen(mixed $condition): Cake\Collection\Iterator\StoppableIterator

{@inheritDoc}

Parameters

$condition

Returns

Cake\Collection\Iterator\StoppableIterator

sumOf() ¶ public

sumOf(mixed $matcher = null)

{@inheritDoc}

Parameters

$matcher optional

take() ¶ public

take(mixed $size = 1, mixed $from = 0)

{@inheritDoc}

Parameters

$size optional
$from optional

through() ¶ public

through(callable $handler)

{@inheritDoc}

Parameters

callable $handler

toArray() ¶ public

toArray(mixed $preserveKeys = true)

{@inheritDoc}

Parameters

$preserveKeys optional

toList() ¶ public

toList()

{@inheritDoc}

transpose() ¶ public

transpose(): Cake\Collection\CollectionInterface

{@inheritDoc}

Returns

Cake\Collection\CollectionInterface

unfold() ¶ public

unfold(callable $transformer = null)

{@inheritDoc}

Parameters

callable $transformer optional

unwrap() ¶ public

unwrap()

{@inheritDoc}

zip() ¶ public

zip(mixed $items)

{@inheritDoc}

Parameters

$items

zipWith() ¶ public

zipWith(mixed $items, mixed $callable)

{@inheritDoc}

Parameters

$items
$callable

Property Detail

`$_mode` ¶ protected

The iteration mode

Type

int

Namespaces

Class TreeIterator

Property Summary

Method Summary

__construct() public

_createMatcherFilter() protected

_extract() protected

_propertyExtractor() protected

_simpleExtract() protected

_unwrap() public deprecated

append() public

buffered() public

cartesianProduct() public

chunk() public

combine() public

compile() public

contains() public

countBy() public

each() public

every() public

extract() public

filter() public

first() public

firstMatch() public

groupBy() public

indexBy() public

insert() public

isEmpty() public

jsonSerialize() public

last() public

listNested() public

map() public

match() public

max() public

min() public

nest() public

printer() public

reduce() public

reject() public

sample() public

shuffle() public

skip() public

some() public

sortBy() public

stopWhen() public

sumOf() public

take() public

through() public

toArray() public

toList() public

transpose() public

unfold() public

unwrap() public

zip() public

zipWith() public

Method Detail

__construct() ¶ public

Parameters

_createMatcherFilter() ¶ protected

Parameters

Returns

_extract() ¶ protected

Parameters

Returns

_propertyExtractor() ¶ protected

Parameters

Returns

_simpleExtract() ¶ protected

Parameters

Returns

_unwrap() ¶ public

Returns

append() ¶ public

Parameters

buffered() ¶ public

Returns

cartesianProduct() ¶ public

Parameters

Returns

chunk() ¶ public