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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,4 @@ | ||
| /nbproject | ||
| /.idea | ||
| /tests/phpunit.xml | ||
| /tests/coverage |
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134 changes: 134 additions & 0 deletions
134
library/Xi/Collections/Collection/SimpleCollectionView.php
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| <?php | ||
| namespace Xi\Collections\Collection; | ||
| use Xi\Collections\Util; | ||
| use Xi\Collections\CollectionView; | ||
|
|
||
| class SimpleCollectionView extends SimpleCollection implements CollectionView | ||
| { | ||
| /** | ||
| * @var callback(Traversable) $creator | ||
| */ | ||
| protected $creator; | ||
|
|
||
| /** | ||
| * @param Traversable $traversable | ||
| * @param callback(Traversable) $creator optional | ||
| */ | ||
| public function __construct($traversable, $creator = null) | ||
| { | ||
| $this->traversable = $traversable; | ||
| if (null === $creator) { | ||
| $creator = SimpleCollection::getCreator(); | ||
| } | ||
| $this->creator = $creator; | ||
| } | ||
|
|
||
| public function force() | ||
| { | ||
| $creator = $this->creator; | ||
| return $creator($this); | ||
| } | ||
|
|
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| protected function lazy($iterator) | ||
| { | ||
| return new static($iterator, $this->creator); | ||
| } | ||
|
|
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| public function apply($callback) | ||
| { | ||
| $self = $this; | ||
| return $this->lazy($this->getLazyIteratorFor(function() use($self, $callback) { | ||
| return $callback($self); | ||
| })); | ||
| } | ||
|
|
||
| public function take($number) | ||
| { | ||
| if (0 >= $number) { | ||
| return $this->lazy(new \EmptyIterator); | ||
| } | ||
| return $this->lazy(new \LimitIterator($this->getIterator(), 0, $number)); | ||
| } | ||
|
|
||
| public function map($callback) | ||
| { | ||
| return $this->lazy($this->getMapIteratorFor($this->getIterator(), $callback)); | ||
| } | ||
|
|
||
| public function filter($predicate = null) | ||
| { | ||
| if (null === $predicate) { | ||
| $predicate = function($value) { | ||
| return !empty($value); | ||
| }; | ||
| } | ||
|
|
||
| return $this->lazy($this->getFilterIteratorFor($this->getIterator(), $predicate)); | ||
| } | ||
|
|
||
| public function concatenate($other) | ||
| { | ||
| $iterator = new \AppendIterator; | ||
| $iterator->append($this->getIterator()); | ||
| $iterator->append($this->getIteratorFor($other)); | ||
| return $this->lazy($this->getReindexIteratorFor($iterator)); | ||
| } | ||
|
|
||
| public function union($other) | ||
| { | ||
| $iterator = new \AppendIterator; | ||
| $iterator->append($this->getIterator()); | ||
| $iterator->append($this->getIteratorFor($other)); | ||
| return $this->lazy($this->getLazyIteratorFor(function() use($iterator) { | ||
| return iterator_to_array($iterator); | ||
| })); | ||
| } | ||
|
|
||
| public function flatMap($callback) | ||
| { | ||
| return $this->lazy($this->getReindexIteratorFor($this->getFlatMapIteratorFor($this->getIterator(), $callback))); | ||
| } | ||
|
|
||
| public function values() | ||
| { | ||
| return $this->lazy($this->getReindexIteratorFor($this->getIterator())); | ||
| } | ||
|
|
||
| public function keys() | ||
| { | ||
| return $this->lazy($this->getReindexIteratorFor($this->getMapIteratorFor( | ||
| $this->getIterator(), | ||
| function($v, $k) { return $k; } | ||
| ))); | ||
| } | ||
|
|
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| protected function getIteratorFor($other) | ||
| { | ||
| return Util\Functions::getIterator($other); | ||
| } | ||
|
|
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| protected function getLazyIteratorFor($callback) | ||
| { | ||
| return new Util\LazyIterator($callback); | ||
| } | ||
|
|
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| protected function getReindexIteratorFor($iterator) | ||
| { | ||
| return new Util\ReindexIterator($iterator); | ||
| } | ||
|
|
||
| protected function getFlatMapIteratorFor($iterator, $callback) | ||
| { | ||
| return new \RecursiveIteratorIterator(new Util\FlatMapIterator($iterator, $callback)); | ||
| } | ||
|
|
||
| protected function getMapIteratorFor($iterator, $callback) | ||
| { | ||
| return new Util\CallbackMapIterator($iterator, $callback); | ||
| } | ||
|
|
||
| protected function getFilterIteratorFor($iterator, $callback) | ||
| { | ||
| return new Util\CallbackFilterIterator($iterator, $callback); | ||
| } | ||
| } |
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