class.ilMDMetaMetadata.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/


include_once 'class.ilMDBase.php';

class ilMDMetaMetadata extends ilMDBase
{
        // SUBELEMENTS
        function &getIdentifierIds()
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDIdentifier.php';

                return ilMDIdentifier::_getIds($this->getRBACId(),$this->getObjId(),$this->getMetaId(),'meta_meta_data');
        }
        function &getIdentifier($a_identifier_id)
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDIdentifier.php';
                
                if(!$a_identifier_id)
                {
                        return false;
                }
                $ide = new ilMDIdentifier();
                $ide->setMetaId($a_identifier_id);

                return $ide;
        }
        function &addIdentifier()
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDIdentifier.php';

                $ide = new ilMDIdentifier($this->getRBACId(),$this->getObjId(),$this->getObjType());
                $ide->setParentId($this->getMetaId());
                $ide->setParentType('meta_meta_data');

                return $ide;
        }
        
        function &getContributeIds()
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDContribute.php';

                return ilMDContribute::_getIds($this->getRBACId(),$this->getObjId(),$this->getMetaId(),'meta_meta_data');
        }
        function &getContribute($a_contribute_id)
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDContribute.php';
                
                if(!$a_contribute_id)
                {
                        return false;
                }
                $con = new ilMDContribute();
                $con->setMetaId($a_contribute_id);

                return $con;
        }
        function &addContribute()
        {
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDContribute.php';

                $con = new ilMDContribute($this->getRBACId(),$this->getObjId(),$this->getObjType());
                $con->setParentId($this->getMetaId());
                $con->setParentType('meta_meta_data');

                return $con;
        }



        // SET/GET
        function setMetaDataScheme($a_val)
        {
                $this->meta_data_scheme = $a_val;
        }
        function getMetaDataScheme()
        {
                // Fixed attribute
                return 'LOM v 1.0';
        }
        function setLanguage(&$lng_obj)
        {
                if(is_object($lng_obj))
                {
                        $this->language = $lng_obj;
                }
        }
        function &getLanguage()
        {
                return is_object($this->language) ? $this->language : false;
        }
        function getLanguageCode()
        {
                return is_object($this->language) ? $this->language->getLanguageCode() : false;
        }
        

        function save()
        {
                if($this->db->autoExecute('il_meta_meta_data',
                                                                  $this->__getFields(),
                                                                  ilDBConstants::MDB2_AUTOQUERY_INSERT))
                {
                        $this->setMetaId($this->db->getLastInsertId());

                        return $this->getMetaId();
                }
                return false;
        }

        function update()
        {
                global $ilDB;
                
                if($this->getMetaId())
                {
                        if($this->db->autoExecute('il_meta_meta_data',
                                                                          $this->__getFields(),
                                                                          ilDBConstants::MDB2_AUTOQUERY_UPDATE,
                                                                          "meta_meta_data_id = ".$ilDB->quote($this->getMetaId())))
                        {
                                return true;
                        }
                }
                return false;
        }

        function delete()
        {
                global $ilDB;
                
                if($this->getMetaId())
                {
                        $query = "DELETE FROM il_meta_meta_data ".
                                "WHERE meta_meta_data_id = ".$ilDB->quote($this->getMetaId());
                        
                        $this->db->query($query);
                        

                        foreach($this->getIdentifierIds() as $id)
                        {
                                $ide = $this->getIdentifier($id);
                                $ide->delete();
                        }
                
                        foreach($this->getContributeIds() as $id)
                        {
                                $con = $this->getContribute($id);
                                $con->delete();
                        }
                        return true;
                }

                return false;
        }
                        

        function __getFields()
        {
                return array('rbac_id'  => $this->getRBACId(),
                                         'obj_id'       => $this->getObjId(),
                                         'obj_type'     => ilUtil::prepareDBString($this->getObjType()),
                                         'meta_data_scheme'     => ilUtil::prepareDBString($this->getMetaDataScheme()),
                                         'language' => ilUtil::prepareDBString($this->getLanguageCode()));
        }

        function read()
        {
                global $ilDB;
                                
                include_once 'Services/Migration/DBUpdate_426/classes/class.ilMDLanguageItem.php';


                if($this->getMetaId())
                {

                        $query = "SELECT * FROM il_meta_meta_data ".
                                "WHERE meta_meta_data_id = ".$ilDB->quote($this->getMetaId());

                
                        $res = $this->db->query($query);
                        while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                        {
                                $this->setRBACId($row->rbac_id);
                                $this->setObjId($row->obj_id);
                                $this->setObjType($row->obj_type);
                                $this->setMetaDataScheme(ilUtil::stripSlashes($row->meta_data_scheme));
                                $this->setLanguage(new ilMDLanguageItem($row->language));
                        }
                        return true;
                }
                return false;
        }
                                
        /*
         * XML Export of all meta data
         * @param object (xml writer) see class.ilMD2XML.php
         * 
         */
        function toXML(&$writer)
        {
                if($this->getMigration/DBUpdate_426Scheme())
                {
                        $attr['Metadata-Scheme'] = $this->getMigration/DBUpdate_426Scheme();
                }
                if($this->getLanguageCode())
                {
                        $attr['Language'] = $this->getLanguageCode();
                }
                $writer->xmlStartTag('Meta-Metadata',$attr ? $attr : null);

                // ELEMENT IDENTIFIER
                foreach($this->getIdentifierIds() as $id)
                {
                        $ide =& $this->getIdentifier($id);
                        $ide->toXML($writer);
                }
                
                // ELEMETN Contribute
                foreach($this->getContributeIds() as $id)
                {
                        $con =& $this->getContribute($id);
                        $con->toXML($writer);
                }

                $writer->xmlEndTag('Meta-Metadata');
        }

        // STATIC
        function _getId($a_rbac_id,$a_obj_id)
        {
                global $ilDB;

                $query = "SELECT meta_meta_data_id FROM il_meta_meta_data ".
                        "WHERE rbac_id = ".$ilDB->quote($a_rbac_id)." ".
                        "AND obj_id = ".$ilDB->quote($a_obj_id);

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT))
                {
                        return $row->meta_meta_data_id;
                }
                return false;
        }
}
?>