Comparison.php

<?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;


/**
 * Comparison of a field with a value by the given operator.
 *
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 * @since 2.3
 */
class Comparison implements Expression {
  const EQ = '=';
  const NEQ = '<>';
  const LT = '<';
  const LTE = '<=';
  const GT = '>';
  const GTE = '>=';
  const IS = 'IS';
  const IN = 'IN';
  const NIN = 'NIN';
  private $field;
  private $op;
  private $value;
  public function __construct($field, $operator, $value) {
    if (!$value instanceof Value) {
      $value = new Value($value);
    }
    $this->field = $field;
    $this->op = $operator;
    $this->value = $value;
  }
  public function getField() {
    return $this->field;
  }
  public function getValue() {
    return $this->value;
  }
  public function getOperator() {
    return $this->op;
  }
  public function visit(ExpressionVisitor $visitor) {
    return $visitor
      ->walkComparison($this);
  }

}