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<?php
declare(strict_types=1);
namespace Doctrine\Common\Collections;
use Closure;
use LogicException;
use ReturnTypeWillChange;
use Traversable;
/**
* Lazy collection that is backed by a concrete collection
*
* @psalm-template TKey of array-key
* @psalm-template T
* @template-implements Collection<TKey,T>
*/
abstract class AbstractLazyCollection implements Collection
{
/**
* The backed collection to use
*
* @psalm-var Collection<TKey,T>|null
* @var Collection<mixed>|null
*/
protected Collection|null $collection;
protected bool $initialized = false;
/**
* {@inheritDoc}
*
* @return int
*/
#[ReturnTypeWillChange]
public function count()
{
$this->initialize();
return $this->collection->count();
}
/**
* {@inheritDoc}
*/
public function add(mixed $element)
{
$this->initialize();
$this->collection->add($element);
}
/**
* {@inheritDoc}
*/
public function clear()
{
$this->initialize();
$this->collection->clear();
}
/**
* {@inheritDoc}
*
* @template TMaybeContained
*/
public function contains(mixed $element)
{
$this->initialize();
return $this->collection->contains($element);
}
/**
* {@inheritDoc}
*/
public function isEmpty()
{
$this->initialize();
return $this->collection->isEmpty();
}
/**
* {@inheritDoc}
*/
public function remove(string|int $key)
{
$this->initialize();
return $this->collection->remove($key);
}
/**
* {@inheritDoc}
*/
public function removeElement(mixed $element)
{
$this->initialize();
return $this->collection->removeElement($element);
}
/**
* {@inheritDoc}
*/
public function containsKey(string|int $key)
{
$this->initialize();
return $this->collection->containsKey($key);
}
/**
* {@inheritDoc}
*/
public function get(string|int $key)
{
$this->initialize();
return $this->collection->get($key);
}
/**
* {@inheritDoc}
*/
public function getKeys()
{
$this->initialize();
return $this->collection->getKeys();
}
/**
* {@inheritDoc}
*/
public function getValues()
{
$this->initialize();
return $this->collection->getValues();
}
/**
* {@inheritDoc}
*/
public function set(string|int $key, mixed $value)
{
$this->initialize();
$this->collection->set($key, $value);
}
/**
* {@inheritDoc}
*/
public function toArray()
{
$this->initialize();
return $this->collection->toArray();
}
/**
* {@inheritDoc}
*/
public function first()
{
$this->initialize();
return $this->collection->first();
}
/**
* {@inheritDoc}
*/
public function last()
{
$this->initialize();
return $this->collection->last();
}
/**
* {@inheritDoc}
*/
public function key()
{
$this->initialize();
return $this->collection->key();
}
/**
* {@inheritDoc}
*/
public function current()
{
$this->initialize();
return $this->collection->current();
}
/**
* {@inheritDoc}
*/
public function next()
{
$this->initialize();
return $this->collection->next();
}
/**
* {@inheritDoc}
*/
public function exists(Closure $p)
{
$this->initialize();
return $this->collection->exists($p);
}
/**
* {@inheritDoc}
*/
public function findFirst(Closure $p)
{
$this->initialize();
return $this->collection->findFirst($p);
}
/**
* @psalm-param Closure(T, TKey):bool $p
*
* @return ReadableCollection<mixed>
* @psalm-return ReadableCollection<TKey, T>
*/
public function filter(Closure $p)
{
$this->initialize();
return $this->collection->filter($p);
}
/**
* {@inheritDoc}
*/
public function forAll(Closure $p)
{
$this->initialize();
return $this->collection->forAll($p);
}
/**
* {@inheritDoc}
*
* @psalm-param Closure(T):U $func
*
* @return ReadableCollection<mixed>
* @psalm-return ReadableCollection<TKey, U>
*
* @psalm-template U
*/
public function map(Closure $func)
{
$this->initialize();
return $this->collection->map($func);
}
/**
* {@inheritDoc}
*/
public function reduce(Closure $func, mixed $initial = null)
{
$this->initialize();
return $this->collection->reduce($func, $initial);
}
/**
* {@inheritDoc}
*/
public function partition(Closure $p)
{
$this->initialize();
return $this->collection->partition($p);
}
/**
* {@inheritDoc}
*
* @template TMaybeContained
*/
public function indexOf(mixed $element)
{
$this->initialize();
return $this->collection->indexOf($element);
}
/**
* {@inheritDoc}
*/
public function slice(int $offset, int|null $length = null)
{
$this->initialize();
return $this->collection->slice($offset, $length);
}
/**
* {@inheritDoc}
*
* @return Traversable<int|string, mixed>
* @psalm-return Traversable<TKey,T>
*/
#[ReturnTypeWillChange]
public function getIterator()
{
$this->initialize();
return $this->collection->getIterator();
}
/**
* {@inheritDoc}
*
* @param TKey $offset
*
* @return bool
*/
#[ReturnTypeWillChange]
public function offsetExists(mixed $offset)
{
$this->initialize();
return $this->collection->offsetExists($offset);
}
/**
* {@inheritDoc}
*
* @param TKey $offset
*
* @return T|null
*/
#[ReturnTypeWillChange]
public function offsetGet(mixed $offset)
{
$this->initialize();
return $this->collection->offsetGet($offset);
}
/**
* {@inheritDoc}
*
* @param TKey|null $offset
* @param T $value
*
* @return void
*/
#[ReturnTypeWillChange]
public function offsetSet(mixed $offset, mixed $value)
{
$this->initialize();
$this->collection->offsetSet($offset, $value);
}
/**
* @param TKey $offset
*
* @return void
*/
#[ReturnTypeWillChange]
public function offsetUnset(mixed $offset)
{
$this->initialize();
$this->collection->offsetUnset($offset);
}
/**
* Is the lazy collection already initialized?
*
* @return bool
*
* @psalm-assert-if-true Collection<TKey,T> $this->collection
*/
public function isInitialized()
{
return $this->initialized;
}
/**
* Initialize the collection
*
* @return void
*
* @psalm-assert Collection<TKey,T> $this->collection
*/
protected function initialize()
{
if ($this->initialized) {
return;
}
$this->doInitialize();
$this->initialized = true;
if ($this->collection === null) {
throw new LogicException('You must initialize the collection property in the doInitialize() method.');
}
}
/**
* Do the initialization logic
*
* @return void
*/
abstract protected function doInitialize();
}
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