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<?php
/*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the MIT license. For more information, see
* <http://www.doctrine-project.org>.
*/
namespace Doctrine\Common\Collections;
use Closure;
/**
* Lazy collection that is backed by a concrete collection
*
* @author Michaël Gallego <mic.gallego@gmail.com>
* @since 1.2
*/
abstract class AbstractLazyCollection implements Collection
{
/**
* The backed collection to use
*
* @var Collection
*/
protected $collection;
/**
* @var boolean
*/
protected $initialized = false;
/**
* {@inheritDoc}
*/
public function count()
{
$this->initialize();
return $this->collection->count();
}
/**
* {@inheritDoc}
*/
public function add($element)
{
$this->initialize();
return $this->collection->add($element);
}
/**
* {@inheritDoc}
*/
public function clear()
{
$this->initialize();
$this->collection->clear();
}
/**
* {@inheritDoc}
*/
public function contains($element)
{
$this->initialize();
return $this->collection->contains($element);
}
/**
* {@inheritDoc}
*/
public function isEmpty()
{
$this->initialize();
return $this->collection->isEmpty();
}
/**
* {@inheritDoc}
*/
public function remove($key)
{
$this->initialize();
return $this->collection->remove($key);
}
/**
* {@inheritDoc}
*/
public function removeElement($element)
{
$this->initialize();
return $this->collection->removeElement($element);
}
/**
* {@inheritDoc}
*/
public function containsKey($key)
{
$this->initialize();
return $this->collection->containsKey($key);
}
/**
* {@inheritDoc}
*/
public function get($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 $this->collection->getValues();
}
/**
* {@inheritDoc}
*/
public function set($key, $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 filter(Closure $p)
{
$this->initialize();
return $this->collection->filter($p);
}
/**
* {@inheritDoc}
*/
public function forAll(Closure $p)
{
$this->initialize();
return $this->collection->forAll($p);
}
/**
* {@inheritDoc}
*/
public function map(Closure $func)
{
$this->initialize();
return $this->collection->map($func);
}
/**
* {@inheritDoc}
*/
public function partition(Closure $p)
{
$this->initialize();
return $this->collection->partition($p);
}
/**
* {@inheritDoc}
*/
public function indexOf($element)
{
$this->initialize();
return $this->collection->indexOf($element);
}
/**
* {@inheritDoc}
*/
public function slice($offset, $length = null)
{
$this->initialize();
return $this->collection->slice($offset, $length);
}
/**
* {@inheritDoc}
*/
public function getIterator()
{
$this->initialize();
return $this->collection->getIterator();
}
/**
* {@inheritDoc}
*/
public function offsetExists($offset)
{
$this->initialize();
return $this->collection->offsetExists($offset);
}
/**
* {@inheritDoc}
*/
public function offsetGet($offset)
{
$this->initialize();
return $this->collection->offsetGet($offset);
}
/**
* {@inheritDoc}
*/
public function offsetSet($offset, $value)
{
$this->initialize();
$this->collection->offsetSet($offset, $value);
}
/**
* {@inheritDoc}
*/
public function offsetUnset($offset)
{
$this->initialize();
$this->collection->offsetUnset($offset);
}
/**
* Is the lazy collection already initialized?
*
* @return bool
*/
public function isInitialized()
{
return $this->initialized;
}
/**
* Initialize the collection
*
* @return void
*/
protected function initialize()
{
if ( ! $this->initialized) {
$this->doInitialize();
$this->initialized = true;
}
}
/**
* Do the initialization logic
*
* @return void
*/
abstract protected function doInitialize();
}