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Merge pull request #2 from pinepain/eliminate_duplication
Add behavior logic to WeakKeyValueMap and use inheritance
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| tools: | ||
| external_code_coverage: true |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,169 @@ | ||
| <?php | ||
|
|
||
| /* | ||
| * This file is part of the pinepain/php-weak-lib PHP library. | ||
| * | ||
| * Copyright (c) 2016 Bogdan Padalko <[email protected]> | ||
| * | ||
| * Licensed under the MIT license: http://opensource.org/licenses/MIT | ||
| * | ||
| * For the full copyright and license information, please view the LICENSE | ||
| * file that was distributed with this source code or visit http://opensource.org/licenses/MIT | ||
| */ | ||
|
|
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| namespace Weak; | ||
|
|
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| use RuntimeException; | ||
| use SplObjectStorage; | ||
|
|
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| abstract class AbstractWeakMap extends SplObjectStorage | ||
| { | ||
| const WEAK_KEY = 1; | ||
| const WEAK_VAL = 2; | ||
|
|
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| protected $behavior = 0; | ||
|
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| /** {@inheritdoc} */ | ||
| public function attach($object, $data = null) | ||
| { | ||
| if ($this->behavior & self::WEAK_KEY) { | ||
| $object = $this->buildWeakKey($object); | ||
| } | ||
|
|
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| if ($this->behavior & self::WEAK_VAL) { | ||
| $data = $this->buildWeakValue($object, $data); | ||
| } | ||
|
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| parent::attach($object, $data); | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function current() | ||
| { | ||
| $object = parent::current(); | ||
|
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| if ($this->behavior & self::WEAK_KEY) { | ||
| $object = $this->extractWeakObject($object); | ||
| } | ||
|
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| /* In some rare cases (it should never happen normally) orphaned weak reference may occurs in storage, so | ||
| * so current object here MAY be null | ||
| */ | ||
|
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| return $object; | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function addAll($storage) | ||
| { | ||
| foreach ($storage as $obj) { | ||
| $this->attach($obj, $storage[$obj]); | ||
| } | ||
| } | ||
|
|
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| /** {@inheritdoc} */ | ||
| public function removeAllExcept($storage) | ||
| { | ||
| $pending_removal = new \SplObjectStorage(); | ||
|
|
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| foreach ($this as $obj) { | ||
| if (!$storage->contains($obj)) { | ||
| $pending_removal->attach($obj); | ||
| } | ||
| } | ||
|
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| $this->removeAll($pending_removal); | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function getHash($object) | ||
| { | ||
| if ($this->behavior & self::WEAK_KEY) { | ||
| if ($object instanceof HashedReference) { | ||
| return $object->getHash(); | ||
| } | ||
| } | ||
|
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| return parent::getHash($object); | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function getInfo() | ||
| { | ||
| $info = parent::getInfo(); | ||
|
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| if ($this->behavior & self::WEAK_VAL) { | ||
| $info = $this->extractWeakObject($info); | ||
| } | ||
|
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| return $info; | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function setInfo($data) | ||
| { | ||
| $object = $this->current(); | ||
|
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| if (!$object) { | ||
| return; // nothing to do | ||
| } | ||
|
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| if ($this->behavior & self::WEAK_VAL) { | ||
| $data = $this->buildWeakValue($object, $data); | ||
| } | ||
|
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| parent::setInfo($data); | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function offsetSet($object, $data = null) | ||
| { | ||
| $this->attach($object, $data); | ||
| } | ||
|
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| /** {@inheritdoc} */ | ||
| public function offsetGet($object) | ||
| { | ||
| $info = parent::offsetGet($object); | ||
|
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| if ($this->behavior & self::WEAK_VAL) { | ||
| $info = $this->extractWeakObject($info); | ||
| } | ||
|
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| return $info; | ||
| } | ||
|
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| protected function validateInfo($data) | ||
| { | ||
| if (!is_object($data)) { | ||
| throw new RuntimeException(static::class . ' expects data to be object, ' . gettype($data) . ' given'); | ||
| } | ||
| } | ||
|
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| protected function extractWeakObject($object) | ||
| { | ||
| if ($object instanceof Reference) { | ||
| $object = $object->get(); | ||
| } | ||
|
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| return $object; | ||
| } | ||
|
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| protected function buildWeakKey($object) | ||
| { | ||
| $object = new HashedReference($object, [$this, 'detach'], 'spl_object_hash'); | ||
|
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| return $object; | ||
| } | ||
|
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| protected function buildWeakValue($object, $data) | ||
| { | ||
| $this->validateInfo($data); | ||
|
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| $data = new Reference($data, function () use ($object) { | ||
| $this->detach($object); | ||
| }); | ||
|
|
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| return $data; | ||
| } | ||
| } |
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