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<?php
/**
* Encapsulate strategies for getting a real, local filesystem structure from
* a VFS.
*
* $Horde: framework/VFS_ISOWriter/ISOWriter/RealInputStrategy.php,v 1.1.8.7 2006/01/01 21:28:43 jan Exp $
*
* Copyright 2004-2006 Cronosys, LLC <http://www.cronosys.com/>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Jason M. Felice <jfelice@cronosys.com>
* @package VFS_ISO
* @since Horde 3.0
*/
class VFS_ISOWriter_RealInputStrategy {
/**
* A reference to the source VFS we want to read.
*
* @var VFS
*/
var $_sourceVfs = null;
/**
* The root directory within the source VFS
*
* @var string
*/
var $_sourceRoot;
function VFS_ISOWriter_RealInputStrategy(&$sourceVfs, $sourceRoot)
{
$this->_sourceVfs = &$sourceVfs;
$this->_sourceRoot = &$sourceRoot;
}
/**
* Get a real path to the input tree.
*
* @abstract
* @return mixed A string with the real path, or PEAR_Error on failure.
*/
function getRealPath()
{
return PEAR::raiseError(_("Not implemented."));
}
/**
* Indicate we are finished with this input strategy.
*
* @abstract
* @return mixed Null or PEAR_Error on failure.
*/
function finished()
{
return PEAR::raiseError(_("Not implemented."));
}
/**
* Decide which strategy to use to get a real FS and create it.
*
* @static
*
* @param object &$sourceVfs The VFS we want to read from.
* @param string $sourceRoot The root directory in that VFS.
* @return object A concrete strategy or PEAR_Error if no strategy is
* available.
*/
function factory(&$sourceVfs, $sourceRoot)
{
if (strtolower(get_class($sourceVfs)) == 'vfs_file') {
$method = 'direct';
} else {
$method = 'copy';
}
@include_once dirname(__FILE__) . '/RealInputStrategy/' . $method .
'.php';
$class = 'VFS_ISOWriter_RealInputStrategy_' . $method;
if (!class_exists($class)) {
return PEAR::raiseError(sprintf(_("Could not load strategy \"%s\"."),
$method));
}
$strategy = &new $class($sourceVfs, $sourceRoot);
return $strategy;
}
}
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