+<?php
+// +----------------------------------------------------------------------+
+// | PHP version 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
+// | Stig. S. Bakken, Lukas Smith |
+// | All rights reserved. |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
+// | API as well as database abstraction for PHP applications. |
+// | This LICENSE is in the BSD license style. |
+// | |
+// | Redistribution and use in source and binary forms, with or without |
+// | modification, are permitted provided that the following conditions |
+// | are met: |
+// | |
+// | Redistributions of source code must retain the above copyright |
+// | notice, this list of conditions and the following disclaimer. |
+// | |
+// | Redistributions in binary form must reproduce the above copyright |
+// | notice, this list of conditions and the following disclaimer in the |
+// | documentation and/or other materials provided with the distribution. |
+// | |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission. |
+// | |
+// | 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 |
+// | REGENTS 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. |
+// +----------------------------------------------------------------------+
+// | Author: Lukas Smith <smith@pooteeweet.org> |
+// +----------------------------------------------------------------------+
+//
+// $Id: Iterator.php 327310 2012-08-27 15:16:18Z danielc $
+
+/**
+ * PHP5 Iterator
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_Iterator implements Iterator
+{
+ protected $fetchmode;
+ /**
+ * @var MDB2_Result_Common
+ */
+ protected $result;
+ protected $row;
+
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ public function __construct(MDB2_Result_Common $result, $fetchmode = MDB2_FETCHMODE_DEFAULT)
+ {
+ $this->result = $result;
+ $this->fetchmode = $fetchmode;
+ }
+ // }}}
+
+ // {{{ seek()
+
+ /**
+ * Seek forward to a specific row in a result set
+ *
+ * @param int number of the row where the data can be found
+ *
+ * @return void
+ * @access public
+ */
+ public function seek($rownum)
+ {
+ $this->row = null;
+ if ($this->result) {
+ $this->result->seek($rownum);
+ }
+ }
+ // }}}
+
+ // {{{ next()
+
+ /**
+ * Fetch next row of data
+ *
+ * @return void
+ * @access public
+ */
+ public function next()
+ {
+ $this->row = null;
+ }
+ // }}}
+
+ // {{{ current()
+
+ /**
+ * return a row of data
+ *
+ * @return void
+ * @access public
+ */
+ public function current()
+ {
+ if (null === $this->row) {
+ $row = $this->result->fetchRow($this->fetchmode);
+ if (MDB2::isError($row)) {
+ $row = false;
+ }
+ $this->row = $row;
+ }
+ return $this->row;
+ }
+ // }}}
+
+ // {{{ valid()
+
+ /**
+ * Check if the end of the result set has been reached
+ *
+ * @return bool true/false, false is also returned on failure
+ * @access public
+ */
+ public function valid()
+ {
+ return (bool)$this->current();
+ }
+ // }}}
+
+ // {{{ free()
+
+ /**
+ * Free the internal resources associated with result.
+ *
+ * @return bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+ * @access public
+ */
+ public function free()
+ {
+ if ($this->result) {
+ return $this->result->free();
+ }
+ $this->result = false;
+ $this->row = null;
+ return false;
+ }
+ // }}}
+
+ // {{{ key()
+
+ /**
+ * Returns the row number
+ *
+ * @return int|bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+ * @access public
+ */
+ public function key()
+ {
+ if ($this->result) {
+ return $this->result->rowCount();
+ }
+ return false;
+ }
+ // }}}
+
+ // {{{ rewind()
+
+ /**
+ * Seek to the first row in a result set
+ *
+ * @return void
+ * @access public
+ */
+ public function rewind()
+ {
+ }
+ // }}}
+
+ // {{{ destructor
+
+ /**
+ * Destructor
+ */
+ public function __destruct()
+ {
+ $this->free();
+ }
+ // }}}
+}
+
+/**
+ * PHP5 buffered Iterator
+ *
+ * @package MDB2
+ * @category Database
+ * @author Lukas Smith <smith@pooteeweet.org>
+ */
+class MDB2_BufferedIterator extends MDB2_Iterator implements SeekableIterator
+{
+ // {{{ valid()
+
+ /**
+ * Check if the end of the result set has been reached
+ *
+ * @return bool|MDB2_Error true on success, false|MDB2_Error if result is invalid
+ * @access public
+ */
+ public function valid()
+ {
+ if ($this->result) {
+ return $this->result->valid();
+ }
+ return false;
+ }
+ // }}}
+
+ // {{{count()
+
+ /**
+ * Returns the number of rows in a result object
+ *
+ * @return int|MDB2_Error number of rows, false|MDB2_Error if result is invalid
+ * @access public
+ */
+ public function count()
+ {
+ if ($this->result) {
+ return $this->result->numRows();
+ }
+ return false;
+ }
+ // }}}
+
+ // {{{ rewind()
+
+ /**
+ * Seek to the first row in a result set
+ *
+ * @return void
+ * @access public
+ */
+ public function rewind()
+ {
+ $this->seek(0);
+ }
+ // }}}
+}
+
+?>
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