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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Contains the MDB_QueryTool_Result class
*
* PHP versions 4 and 5
*
* LICENSE: Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 FREEBSD PROJECT 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.
*
* @category Database
* @package MDB_QueryTool
* @author Lorenzo Alberton <l.alberton@quipo.it>
* @copyright 2003-2007 Lorenzo Alberton
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @version CVS: $Id: Result.php 247120 2007-11-27 07:45:21Z quipo $
* @link http://pear.php.net/package/MDB_QueryTool
*/
/**
* MDB_QueryTool_Result class
*
* This result actually contains the 'data' itself, the number of rows
* returned and some additional info
* using ZE2 you can also get retrieve data from the result doing the following:
* <MDB_QueryTool_Common-instance>->getAll()->getCount()
* or
* <MDB_QueryTool_Common-instance>->getAll()->getData()
*
* @category Database
* @package MDB_QueryTool
* @author Lorenzo Alberton <l.alberton@quipo.it>
* @copyright 2003-2007 Lorenzo Alberton
* @license http://www.debian.org/misc/bsd.license BSD License (3 Clause)
* @link http://pear.php.net/package/MDB_QueryTool
*/
class MDB_QueryTool_Result
{
// {{{ class vars
/**
* @var array
*/
var $_data = array();
/**
* @var array
*/
var $_dataKeys = array();
/**
* @var integer
*/
var $_count = 0;
/**
* the counter for the methods getFirst, getNext
* @var array
*/
var $_counter = null;
/**
* True if the data is a collection of rows, false if it's a single record
* @var boolean
*/
var $_is_collection_of_rows = false;
// }}}
// {{{ MDB_QueryTool_Result()
/**
* create a new instance of result with the data returned by the query
*
* @param array $data the data returned by the result
*
* @access public
*/
function MDB_QueryTool_Result($data)
{
$this->_checkIfCollectionOfRows($data);
if (!count($data)) {
$this->_count = 0;
} else {
if ($this->_is_collection_of_rows) {
$this->_count = sizeof($data);
} else {
if (sizeof($data) > 0) {
$this->_count = 1;
} else {
$this->_count = 0;
}
}
}
$this->_data = $data;
}
// }}}
// {{{ _checkIfCollectionOfRows
/**
* Check if the result is a single record or a collection of rows
*
* @param array $data the data returned by the result
*
* @return void
* @access private
*/
function _checkIfCollectionOfRows($data)
{
if (is_array($data)) {
$this->_is_collection_of_rows = is_array(array_pop($data));
}
}
// }}}
// {{{ _returnRowOrValue
/**
* Check if the row is a single value with a numeric index.
* If so, return the value straight away, since the user probably
* called getCol() or getOne().
*
* @param array $data the data returned by the result
*
* @return mixed
* @access protected
*/
function _returnRowOrValue($data)
{
if ((count($data) == 1) && is_numeric(key($data))) {
return array_pop($data);
}
return $data;
}
// }}}
// {{{ numRows
/**
* return the number of rows returned. This is an alias for getCount().
*
* @access public
* @return integer
*/
function numRows()
{
return $this->_count;
}
// }}}
// {{{ getCount()
/**
* return the number of rows returned
*
* @access public
* @return integer the number of rows returned
*/
function getCount()
{
return $this->_count;
}
// }}}
// {{{ getData()
/**
* get all the data returned
*
* @param string $key key
*
* @return mixed array or PEAR_Error
* @access public
*/
function getData($key = null)
{
if (is_null($key)) {
return $this->_data;
}
if ($this->_data[$key]) {
return $this->_data[$key];
}
return new PEAR_Error("there is no element with the key '$key'!");
}
// }}}
// {{{ getFirst()
/**
* get the first result set
* we are not using next, current, and reset, since those ignore keys
* which are empty or 0
*
* @return mixed
* @access public
*/
function getFirst()
{
if ($this->getCount() > 0) {
if ($this->_is_collection_of_rows) {
$this->_dataKeys = array_keys($this->_data);
$this->_counter = 0;
return $this->_returnRowOrValue($this->_data[$this->_dataKeys[$this->_counter]]);
}
return $this->_returnRowOrValue($this->_data);
}
return new PEAR_Error('there are no elements!');
}
// }}}
// {{{ getNext()
/**
* Get next result set. If getFirst() has never been called before,
* it calls that method.
*
* @return mixed
* @access public
*/
function getNext()
{
if (!$this->initDone()) {
return $this->getFirst();
}
if ($this->hasMore()) {
$this->_counter++;
return $this->_returnRowOrValue($this->_data[$this->_dataKeys[$this->_counter]]);
}
return new PEAR_Error('there are no more elements!');
}
// }}}
// {{{ hasMore()
/**
* check if there are other rows
*
* @return boolean
* @access public
*/
function hasMore()
{
if ($this->_counter+1 < $this->getCount()) {
return true;
}
return false;
}
// }}}
// {{{ fetchRow
/**
* This function emulates PEAR_MDB fetchRow() method.
* With this method, MDB_QueryTool can transparently replace PEAR::MDB
*
* @return void
* @todo implement fetchmode support?
* @access public
*/
function fetchRow()
{
$arr = $this->getNext();
if (!PEAR::isError($arr)) {
return $arr;
}
return false;
}
// }}}
// {{{ initDone
/**
* Helper method. Check if $this->_dataKeys has been initialized
*
* @return boolean
* @access private
*/
function initDone()
{
return (
isset($this->_dataKeys) &&
is_array($this->_dataKeys) &&
count($this->_dataKeys)
);
}
// }}}
//TODO
//function getPrevious()
//function getLast()
}
?>
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