Source of file ClosureExpressionVisitor.php
Size: 6,443 Bytes - Last Modified: 2012-09-20T07:55:18+02:00
/home/theseer/Downloads/Symfony/vendor/doctrine/common/lib/Doctrine/Common/Collections/Expr/ClosureExpressionVisitor.php
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196 | <?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\Expr; /** * Walks an expression graph and turns it into a PHP closure. * * This closure can be used with {@Collection#filter()} and is used internally * by {@ArrayCollection#select()}. * * @author Benjamin Eberlei <kontakt@beberlei.de> * @since 2.3 */ class ClosureExpressionVisitor extends ExpressionVisitor { /** * Access the field of a given object. This field has to be public directly * or indirectly (through an accessor get* or a magic method, __get, __call). * * is*() is not supported. * * @return mixed */ static public function getObjectFieldValue($object, $field) { $accessor = "get" . $field; if (method_exists($object, $accessor) || method_exists($object, '__call')) { return $object->$accessor(); } if ($object instanceof \ArrayAccess) { return $object[$field]; } return $object->$field; } /** * Helper for sorting arrays of objects based on multiple fields + * orientations. * * @param string $name * @param int $orientation * @param Closure $next * @return Closure */ static public function sortByField($name, $orientation = 1, \Closure $next = null) { if (!$next) { $next = function() { return 0; }; } return function ($a, $b) use ($name, $next, $orientation) { $aValue = ClosureExpressionVisitor::getObjectFieldValue($a, $name); $bValue = ClosureExpressionVisitor::getObjectFieldValue($b, $name); if ($aValue === $bValue) { return $next($a, $b); } return (($aValue > $bValue) ? 1 : -1) * $orientation; }; } /** * {@inheritDoc} */ public function walkComparison(Comparison $comparison) { $field = $comparison->getField(); $value = $comparison->getValue()->getValue(); // shortcut for walkValue() switch ($comparison->getOperator()) { case Comparison::EQ: case Comparison::IS: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) === $value; }; case Comparison::NEQ: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) !== $value; }; case Comparison::LT: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) < $value; }; case Comparison::LTE: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) <= $value; }; case Comparison::GT: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) > $value; }; case Comparison::GTE: return function ($object) use ($field, $value) { return ClosureExpressionVisitor::getObjectFieldValue($object, $field) >= $value; }; case Comparison::IN: return function ($object) use ($field, $value) { return in_array(ClosureExpressionVisitor::getObjectFieldValue($object, $field), $value); }; case Comparison::NIN: return function ($object) use ($field, $value) { return ! in_array(ClosureExpressionVisitor::getObjectFieldValue($object, $field), $value); }; default: throw new \RuntimeException("Unknown comparison operator: " . $comparison->getOperator()); } } /** * {@inheritDoc} */ public function walkValue(Value $value) { return $value->getValue(); } /** * {@inheritDoc} */ public function walkCompositeExpression(CompositeExpression $expr) { $expressionList = array(); foreach ($expr->getExpressionList() as $child) { $expressionList[] = $this->dispatch($child); } switch($expr->getType()) { case CompositeExpression::TYPE_AND: return $this->andExpressions($expressionList); case CompositeExpression::TYPE_OR: return $this->orExpressions($expressionList); default: throw new \RuntimeException("Unknown composite " . $expr->getType()); } } private function andExpressions($expressions) { return function ($object) use ($expressions) { foreach ($expressions as $expression) { if ( ! $expression($object)) { return false; } } return true; }; } private function orExpressions($expressions) { return function ($object) use ($expressions) { foreach ($expressions as $expression) { if ($expression($object)) { return true; } } return false; }; } } |