<?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\DBAL\Cache;
  
  use Doctrine\DBAL\Driver\ResultStatement;
  use PDO;
  
  class ArrayStatement implements \IteratorAggregate, ResultStatement
  {
      private $data;
      private $columnCount = 0;
      private $num = 0;
      private $defaultFetchMode = PDO::FETCH_BOTH;
  
      public function __construct(array $data)
      {
          $this->data = $data;
          if (count($data)) {
              $this->columnCount = count($data[0]);
          }
      }
  
      public function closeCursor()
      {
          unset ($this->data);
      }
  
      public function columnCount()
      {
          return $this->columnCount;
      }
  
      public function setFetchMode($fetchMode, $arg2 = null, $arg3 = null)
      {
          if ($arg2 !== null || $arg3 !== null) {
              throw new \InvalidArgumentException("Caching layer does not support 2nd/3rd argument to setFetchMode()");
          }
  
          $this->defaultFetchMode = $fetchMode;
      }
  
      public function getIterator()
      {
          $data = $this->fetchAll();
          return new \ArrayIterator($data);
      }
  
      public function fetch($fetchMode = null)
      {
          if (isset($this->data[$this->num])) {
              $row = $this->data[$this->num++];
              $fetchMode = $fetchMode ?: $this->defaultFetchMode;
              if ($fetchMode === PDO::FETCH_ASSOC) {
                  return $row;
              } else if ($fetchMode === PDO::FETCH_NUM) {
                  return array_values($row);
              } else if ($fetchMode === PDO::FETCH_BOTH) {
                  return array_merge($row, array_values($row));
              } else if ($fetchMode === PDO::FETCH_COLUMN) {
                  return reset($row);
              } else {
                  throw new \InvalidArgumentException("Invalid fetch-style given for fetching result.");
              }
          }
          return false;
      }
  
      public function fetchAll($fetchMode = null)
      {
          $rows = array();
          while ($row = $this->fetch($fetchMode)) {
              $rows[] = $row;
          }
          return $rows;
      }
  
      public function fetchColumn($columnIndex = 0)
      {
          $row = $this->fetch(PDO::FETCH_NUM);
          if (!isset($row[$columnIndex])) {
              // TODO: verify this is correct behavior
              return false;
          }
          return $row[$columnIndex];
      }
  }