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Edit File : DeepCopy.php \| Size : 7.72 KB
<?php namespace DeepCopy; use ArrayObject; use DateInterval; use DateTimeInterface; use DateTimeZone; use DeepCopy\Exception\CloneException; use DeepCopy\Filter\Filter; use DeepCopy\Matcher\Matcher; use DeepCopy\Reflection\ReflectionHelper; use DeepCopy\TypeFilter\Date\DateIntervalFilter; use DeepCopy\TypeFilter\Spl\ArrayObjectFilter; use DeepCopy\TypeFilter\Spl\SplDoublyLinkedListFilter; use DeepCopy\TypeFilter\TypeFilter; use DeepCopy\TypeMatcher\TypeMatcher; use ReflectionObject; use ReflectionProperty; use SplDoublyLinkedList; /** * @final / class DeepCopy { /* * @var object[] List of objects copied. / private $hashMap = []; /* * Filters to apply. * * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs. / private $filters = []; /* * Type Filters to apply. * * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs. / private $typeFilters = []; /* * @var bool / private $skipUncloneable = false; /* * @var bool / private $useCloneMethod; /* * @param bool $useCloneMethod If set to true, when an object implements the __clone() function, it will be used * instead of the regular deep cloning. / public function __construct($useCloneMethod = false) { $this->useCloneMethod = $useCloneMethod; $this->addTypeFilter(new ArrayObjectFilter($this), new TypeMatcher(ArrayObject::class)); $this->addTypeFilter(new DateIntervalFilter(), new TypeMatcher(DateInterval::class)); $this->addTypeFilter(new SplDoublyLinkedListFilter($this), new TypeMatcher(SplDoublyLinkedList::class)); } /* * If enabled, will not throw an exception when coming across an uncloneable property. * * @param $skipUncloneable * * @return $this / public function skipUncloneable($skipUncloneable = true) { $this->skipUncloneable = $skipUncloneable; return $this; } /* * Deep copies the given object. * * @param mixed $object * * @return mixed / public function copy($object) { $this->hashMap = []; return $this->recursiveCopy($object); } public function addFilter(Filter $filter, Matcher $matcher) { $this->filters[] = [ 'matcher' => $matcher, 'filter' => $filter, ]; } public function prependFilter(Filter $filter, Matcher $matcher) { array_unshift($this->filters, [ 'matcher' => $matcher, 'filter' => $filter, ]); } public function addTypeFilter(TypeFilter $filter, TypeMatcher $matcher) { $this->typeFilters[] = [ 'matcher' => $matcher, 'filter' => $filter, ]; } private function recursiveCopy($var) { // Matches Type Filter if ($filter = $this->getFirstMatchedTypeFilter($this->typeFilters, $var)) { return $filter->apply($var); } // Resource if (is_resource($var)) { return $var; } // Array if (is_array($var)) { return $this->copyArray($var); } // Scalar if (! is_object($var)) { return $var; } // Object return $this->copyObject($var); } /* * Copy an array * @param array $array * @return array / private function copyArray(array $array) { foreach ($array as $key => $value) { $array[$key] = $this->recursiveCopy($value); } return $array; } /* * Copies an object. * * @param object $object * * @throws CloneException * * @return object / private function copyObject($object) { $objectHash = spl_object_hash($object); if (isset($this->hashMap[$objectHash])) { return $this->hashMap[$objectHash]; } $reflectedObject = new ReflectionObject($object); $isCloneable = $reflectedObject->isCloneable(); if (false === $isCloneable) { if ($this->skipUncloneable) { $this->hashMap[$objectHash] = $object; return $object; } throw new CloneException( sprintf( 'The class "%s" is not cloneable.', $reflectedObject->getName() ) ); } $newObject = clone $object; $this->hashMap[$objectHash] = $newObject; if ($this->useCloneMethod && $reflectedObject->hasMethod('__clone')) { return $newObject; } if ($newObject instanceof DateTimeInterface \|\| $newObject instanceof DateTimeZone) { return $newObject; } foreach (ReflectionHelper::getProperties($reflectedObject) as $property) { $this->copyObjectProperty($newObject, $property); } return $newObject; } private function copyObjectProperty($object, ReflectionProperty $property) { // Ignore static properties if ($property->isStatic()) { return; } // Apply the filters foreach ($this->filters as $item) { /* @var Matcher $matcher / $matcher = $item['matcher']; /* @var Filter $filter / $filter = $item['filter']; if ($matcher->matches($object, $property->getName())) { $filter->apply( $object, $property->getName(), function ($object) { return $this->recursiveCopy($object); } ); // If a filter matches, we stop processing this property return; } } $property->setAccessible(true); // Ignore uninitialized properties (for PHP >7.4) if (method_exists($property, 'isInitialized') && !$property->isInitialized($object)) { return; } $propertyValue = $property->getValue($object); // Copy the property $property->setValue($object, $this->recursiveCopy($propertyValue)); } /* * Returns first filter that matches variable, `null` if no such filter found. * * @param array $filterRecords Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and * 'matcher' with value of type {@see TypeMatcher} * @param mixed $var * * @return TypeFilter\|null / private function getFirstMatchedTypeFilter(array $filterRecords, $var) { $matched = $this->first( $filterRecords, function (array $record) use ($var) { / @var TypeMatcher $matcher / $matcher = $record['matcher']; return $matcher->matches($var); } ); return isset($matched) ? $matched['filter'] : null; } /* * Returns first element that matches predicate, `null` if no such element found. * * @param array $elements Array of ['filter' => Filter, 'matcher' => Matcher] pairs. * @param callable $predicate Predicate arguments are: element. * * @return array\|null Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and 'matcher' * with value of type {@see TypeMatcher} or `null`. */ private function first(array $elements, callable $predicate) { foreach ($elements as $element) { if (call_user_func($predicate, $element)) { return $element; } } return null; } } Back

Edit File : DeepCopy.php | Size : 7.72 KB

<?php

namespace DeepCopy;

use ArrayObject;
use DateInterval;
use DateTimeInterface;
use DateTimeZone;
use DeepCopy\Exception\CloneException;
use DeepCopy\Filter\Filter;
use DeepCopy\Matcher\Matcher;
use DeepCopy\Reflection\ReflectionHelper;
use DeepCopy\TypeFilter\Date\DateIntervalFilter;
use DeepCopy\TypeFilter\Spl\ArrayObjectFilter;
use DeepCopy\TypeFilter\Spl\SplDoublyLinkedListFilter;
use DeepCopy\TypeFilter\TypeFilter;
use DeepCopy\TypeMatcher\TypeMatcher;
use ReflectionObject;
use ReflectionProperty;
use SplDoublyLinkedList;

/**
 * @final
 */
class DeepCopy
{
    /**
     * @var object[] List of objects copied.
     */
    private $hashMap = [];

/**
     * Filters to apply.
     *
     * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs.
     */
    private $filters = [];

/**
     * Type Filters to apply.
     *
     * @var array Array of ['filter' => Filter, 'matcher' => Matcher] pairs.
     */
    private $typeFilters = [];

/**
     * @var bool
     */
    private $skipUncloneable = false;

/**
     * @var bool
     */
    private $useCloneMethod;

/**
     * @param bool $useCloneMethod   If set to true, when an object implements the __clone() function, it will be used
     *                               instead of the regular deep cloning.
     */
    public function __construct($useCloneMethod = false)
    {
        $this->useCloneMethod = $useCloneMethod;

$this->addTypeFilter(new ArrayObjectFilter($this), new TypeMatcher(ArrayObject::class));
        $this->addTypeFilter(new DateIntervalFilter(), new TypeMatcher(DateInterval::class));
        $this->addTypeFilter(new SplDoublyLinkedListFilter($this), new TypeMatcher(SplDoublyLinkedList::class));
    }

/**
     * If enabled, will not throw an exception when coming across an uncloneable property.
     *
     * @param $skipUncloneable
     *
     * @return $this
     */
    public function skipUncloneable($skipUncloneable = true)
    {
        $this->skipUncloneable = $skipUncloneable;

return $this;
    }

/**
     * Deep copies the given object.
     *
     * @param mixed $object
     *
     * @return mixed
     */
    public function copy($object)
    {
        $this->hashMap = [];

return $this->recursiveCopy($object);
    }

public function addFilter(Filter $filter, Matcher $matcher)
    {
        $this->filters[] = [
            'matcher' => $matcher,
            'filter'  => $filter,
        ];
    }

public function prependFilter(Filter $filter, Matcher $matcher)
    {
        array_unshift($this->filters, [
            'matcher' => $matcher,
            'filter'  => $filter,
        ]);
    }

public function addTypeFilter(TypeFilter $filter, TypeMatcher $matcher)
    {
        $this->typeFilters[] = [
            'matcher' => $matcher,
            'filter'  => $filter,
        ];
    }

private function recursiveCopy($var)
    {
        // Matches Type Filter
        if ($filter = $this->getFirstMatchedTypeFilter($this->typeFilters, $var)) {
            return $filter->apply($var);
        }

// Resource
        if (is_resource($var)) {
            return $var;
        }

// Array
        if (is_array($var)) {
            return $this->copyArray($var);
        }

// Scalar
        if (! is_object($var)) {
            return $var;
        }

// Object
        return $this->copyObject($var);
    }

/**
     * Copy an array
     * @param array $array
     * @return array
     */
    private function copyArray(array $array)
    {
        foreach ($array as $key => $value) {
            $array[$key] = $this->recursiveCopy($value);
        }

return $array;
    }

/**
     * Copies an object.
     *
     * @param object $object
     *
     * @throws CloneException
     *
     * @return object
     */
    private function copyObject($object)
    {
        $objectHash = spl_object_hash($object);

if (isset($this->hashMap[$objectHash])) {
            return $this->hashMap[$objectHash];
        }

$reflectedObject = new ReflectionObject($object);
        $isCloneable = $reflectedObject->isCloneable();

if (false === $isCloneable) {
            if ($this->skipUncloneable) {
                $this->hashMap[$objectHash] = $object;

return $object;
            }

throw new CloneException(
                sprintf(
                    'The class "%s" is not cloneable.',
                    $reflectedObject->getName()
                )
            );
        }

$newObject = clone $object;
        $this->hashMap[$objectHash] = $newObject;

if ($this->useCloneMethod && $reflectedObject->hasMethod('__clone')) {
            return $newObject;
        }

if ($newObject instanceof DateTimeInterface || $newObject instanceof DateTimeZone) {
            return $newObject;
        }

foreach (ReflectionHelper::getProperties($reflectedObject) as $property) {
            $this->copyObjectProperty($newObject, $property);
        }

return $newObject;
    }

private function copyObjectProperty($object, ReflectionProperty $property)
    {
        // Ignore static properties
        if ($property->isStatic()) {
            return;
        }

// Apply the filters
        foreach ($this->filters as $item) {
            /** @var Matcher $matcher */
            $matcher = $item['matcher'];
            /** @var Filter $filter */
            $filter = $item['filter'];

if ($matcher->matches($object, $property->getName())) {
                $filter->apply(
                    $object,
                    $property->getName(),
                    function ($object) {
                        return $this->recursiveCopy($object);
                    }
                );

// If a filter matches, we stop processing this property
                return;
            }
        }

$property->setAccessible(true);

// Ignore uninitialized properties (for PHP >7.4)
        if (method_exists($property, 'isInitialized') && !$property->isInitialized($object)) {
            return;
        }

$propertyValue = $property->getValue($object);

// Copy the property
        $property->setValue($object, $this->recursiveCopy($propertyValue));
    }

/**
     * Returns first filter that matches variable, `null` if no such filter found.
     *
     * @param array $filterRecords Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and
     *                             'matcher' with value of type {@see TypeMatcher}
     * @param mixed $var
     *
     * @return TypeFilter|null
     */
    private function getFirstMatchedTypeFilter(array $filterRecords, $var)
    {
        $matched = $this->first(
            $filterRecords,
            function (array $record) use ($var) {
                /* @var TypeMatcher $matcher */
                $matcher = $record['matcher'];

return $matcher->matches($var);
            }
        );

return isset($matched) ? $matched['filter'] : null;
    }

/**
     * Returns first element that matches predicate, `null` if no such element found.
     *
     * @param array    $elements Array of ['filter' => Filter, 'matcher' => Matcher] pairs.
     * @param callable $predicate Predicate arguments are: element.
     *
     * @return array|null Associative array with 2 members: 'filter' with value of type {@see TypeFilter} and 'matcher'
     *                    with value of type {@see TypeMatcher} or `null`.
     */
    private function first(array $elements, callable $predicate)
    {
        foreach ($elements as $element) {
            if (call_user_func($predicate, $element)) {
                return $element;
            }
        }

return null;
    }
}

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