--- /dev/null
+<?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 Doctrine\Common\Collections\Expr\Expression;
+use Doctrine\Common\Collections\Expr\CompositeExpression;
+
+/**
+ * Criteria for filtering Selectable collections.
+ *
+ * @author Benjamin Eberlei <kontakt@beberlei.de>
+ * @since 2.3
+ */
+class Criteria
+{
+ /**
+ * @var string
+ */
+ const ASC = 'ASC';
+
+ /**
+ * @var string
+ */
+ const DESC = 'DESC';
+
+ /**
+ * @var \Doctrine\Common\Collections\ExpressionBuilder|null
+ */
+ private static $expressionBuilder;
+
+ /**
+ * @var \Doctrine\Common\Collections\Expr\Expression|null
+ */
+ private $expression;
+
+ /**
+ * @var string[]
+ */
+ private $orderings = array();
+
+ /**
+ * @var int|null
+ */
+ private $firstResult;
+
+ /**
+ * @var int|null
+ */
+ private $maxResults;
+
+ /**
+ * Creates an instance of the class.
+ *
+ * @return Criteria
+ */
+ public static function create()
+ {
+ return new static();
+ }
+
+ /**
+ * Returns the expression builder.
+ *
+ * @return \Doctrine\Common\Collections\ExpressionBuilder
+ */
+ public static function expr()
+ {
+ if (self::$expressionBuilder === null) {
+ self::$expressionBuilder = new ExpressionBuilder();
+ }
+
+ return self::$expressionBuilder;
+ }
+
+ /**
+ * Construct a new Criteria.
+ *
+ * @param Expression $expression
+ * @param string[]|null $orderings
+ * @param int|null $firstResult
+ * @param int|null $maxResults
+ */
+ public function __construct(Expression $expression = null, array $orderings = null, $firstResult = null, $maxResults = null)
+ {
+ $this->expression = $expression;
+
+ $this->setFirstResult($firstResult);
+ $this->setMaxResults($maxResults);
+
+ if (null !== $orderings) {
+ $this->orderBy($orderings);
+ }
+ }
+
+ /**
+ * Sets the where expression to evaluate when this Criteria is searched for.
+ *
+ * @param Expression $expression
+ *
+ * @return Criteria
+ */
+ public function where(Expression $expression)
+ {
+ $this->expression = $expression;
+
+ return $this;
+ }
+
+ /**
+ * Appends the where expression to evaluate when this Criteria is searched for
+ * using an AND with previous expression.
+ *
+ * @param Expression $expression
+ *
+ * @return Criteria
+ */
+ public function andWhere(Expression $expression)
+ {
+ if ($this->expression === null) {
+ return $this->where($expression);
+ }
+
+ $this->expression = new CompositeExpression(CompositeExpression::TYPE_AND, array(
+ $this->expression, $expression
+ ));
+
+ return $this;
+ }
+
+ /**
+ * Appends the where expression to evaluate when this Criteria is searched for
+ * using an OR with previous expression.
+ *
+ * @param Expression $expression
+ *
+ * @return Criteria
+ */
+ public function orWhere(Expression $expression)
+ {
+ if ($this->expression === null) {
+ return $this->where($expression);
+ }
+
+ $this->expression = new CompositeExpression(CompositeExpression::TYPE_OR, array(
+ $this->expression, $expression
+ ));
+
+ return $this;
+ }
+
+ /**
+ * Gets the expression attached to this Criteria.
+ *
+ * @return Expression|null
+ */
+ public function getWhereExpression()
+ {
+ return $this->expression;
+ }
+
+ /**
+ * Gets the current orderings of this Criteria.
+ *
+ * @return string[]
+ */
+ public function getOrderings()
+ {
+ return $this->orderings;
+ }
+
+ /**
+ * Sets the ordering of the result of this Criteria.
+ *
+ * Keys are field and values are the order, being either ASC or DESC.
+ *
+ * @see Criteria::ASC
+ * @see Criteria::DESC
+ *
+ * @param string[] $orderings
+ *
+ * @return Criteria
+ */
+ public function orderBy(array $orderings)
+ {
+ $this->orderings = array_map(
+ function ($ordering) {
+ return strtoupper($ordering) === Criteria::ASC ? Criteria::ASC : Criteria::DESC;
+ },
+ $orderings
+ );
+
+ return $this;
+ }
+
+ /**
+ * Gets the current first result option of this Criteria.
+ *
+ * @return int|null
+ */
+ public function getFirstResult()
+ {
+ return $this->firstResult;
+ }
+
+ /**
+ * Set the number of first result that this Criteria should return.
+ *
+ * @param int|null $firstResult The value to set.
+ *
+ * @return Criteria
+ */
+ public function setFirstResult($firstResult)
+ {
+ $this->firstResult = null === $firstResult ? null : (int) $firstResult;
+
+ return $this;
+ }
+
+ /**
+ * Gets maxResults.
+ *
+ * @return int|null
+ */
+ public function getMaxResults()
+ {
+ return $this->maxResults;
+ }
+
+ /**
+ * Sets maxResults.
+ *
+ * @param int|null $maxResults The value to set.
+ *
+ * @return Criteria
+ */
+ public function setMaxResults($maxResults)
+ {
+ $this->maxResults = null === $maxResults ? null : (int) $maxResults;
+
+ return $this;
+ }
+}