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class.ilMDMetaMetadata.php
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1 <?php
2 /*
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7  | |
8  | This program is free software; you can redistribute it and/or |
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12  | |
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20  | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
21  +-----------------------------------------------------------------------------+
22 */
23 
24 
31 include_once 'class.ilMDBase.php';
32 
33 class ilMDMetaMetadata extends ilMDBase
34 {
35 
36  function ilMDMetaMetadata($a_rbac_id = 0,$a_obj_id = 0,$a_obj_type = '')
37  {
38  parent::ilMDBase($a_rbac_id,
39  $a_obj_id,
40  $a_obj_type);
41  }
42 
43  function getPossibleSubelements()
44  {
45  $subs['Identifier'] = 'meta_identifier';
46  $subs['Contribute'] = 'meta_contribute';
47 
48  return $subs;
49  }
50 
51 
52  // SUBELEMENTS
53  function &getIdentifierIds()
54  {
55  include_once 'Services/MetaData/classes/class.ilMDIdentifier.php';
56 
57  return ilMDIdentifier::_getIds($this->getRBACId(),$this->getObjId(),$this->getMetaId(),'meta_meta_data');
58  }
59  function &getIdentifier($a_identifier_id)
60  {
61  include_once 'Services/MetaData/classes/class.ilMDIdentifier.php';
62 
63  if(!$a_identifier_id)
64  {
65  return false;
66  }
67  $ide =& new ilMDIdentifier();
68  $ide->setMetaId($a_identifier_id);
69 
70  return $ide;
71  }
72  function &addIdentifier()
73  {
74  include_once 'Services/MetaData/classes/class.ilMDIdentifier.php';
75 
76  $ide =& new ilMDIdentifier($this->getRBACId(),$this->getObjId(),$this->getObjType());
77  $ide->setParentId($this->getMetaId());
78  $ide->setParentType('meta_meta_data');
79 
80  return $ide;
81  }
82 
83  function &getContributeIds()
84  {
85  include_once 'Services/MetaData/classes/class.ilMDContribute.php';
86 
87  return ilMDContribute::_getIds($this->getRBACId(),$this->getObjId(),$this->getMetaId(),'meta_meta_data');
88  }
89  function &getContribute($a_contribute_id)
90  {
91  include_once 'Services/MetaData/classes/class.ilMDContribute.php';
92 
93  if(!$a_contribute_id)
94  {
95  return false;
96  }
97  $con =& new ilMDContribute();
98  $con->setMetaId($a_contribute_id);
99 
100  return $con;
101  }
102  function &addContribute()
103  {
104  include_once 'Services/MetaData/classes/class.ilMDContribute.php';
105 
106  $con =& new ilMDContribute($this->getRBACId(),$this->getObjId(),$this->getObjType());
107  $con->setParentId($this->getMetaId());
108  $con->setParentType('meta_meta_data');
109 
110  return $con;
111  }
112 
113 
114 
115  // SET/GET
116  function setMetaDataScheme($a_val)
117  {
118  $this->meta_data_scheme = $a_val;
119  }
120  function getMetaDataScheme()
121  {
122  // Fixed attribute
123  return 'LOM v 1.0';
124  }
125  function setLanguage(&$lng_obj)
126  {
127  if(is_object($lng_obj))
128  {
129  $this->language = $lng_obj;
130  }
131  }
132  function &getLanguage()
133  {
134  return is_object($this->language) ? $this->language : false;
135  }
136  function getLanguageCode()
137  {
138  return is_object($this->language) ? $this->language->getLanguageCode() : false;
139  }
140 
141 
142  function save()
143  {
144  global $ilDB;
145 
146  $fields = $this->__getFields();
147  $fields['meta_meta_data_id'] = array('integer',$next_id = $ilDB->nextId('il_meta_meta_data'));
148 
149  if($this->db->insert('il_meta_meta_data',$fields))
150  {
151  $this->setMetaId($next_id);
152  return $this->getMetaId();
153  }
154  return false;
155  }
156 
157  function update()
158  {
159  global $ilDB;
160 
161  if($this->getMetaId())
162  {
163  if($this->db->update('il_meta_meta_data',
164  $this->__getFields(),
165  array("meta_meta_data_id" => array('integer',$this->getMetaId()))))
166  {
167  return true;
168  }
169  }
170  return false;
171  }
172 
173  function delete()
174  {
175  global $ilDB;
176 
177  if($this->getMetaId())
178  {
179  $query = "DELETE FROM il_meta_meta_data ".
180  "WHERE meta_meta_data_id = ".$ilDB->quote($this->getMetaId() ,'integer');
181  $res = $ilDB->manipulate($query);
182 
183 
184  foreach($this->getIdentifierIds() as $id)
185  {
186  $ide = $this->getIdentifier($id);
187  $ide->delete();
188  }
189 
190  foreach($this->getContributeIds() as $id)
191  {
192  $con = $this->getContribute($id);
193  $con->delete();
194  }
195  return true;
196  }
197 
198  return false;
199  }
200 
201 
202  function __getFields()
203  {
204  return array('rbac_id' => array('integer',$this->getRBACId()),
205  'obj_id' => array('integer',$this->getObjId()),
206  'obj_type' => array('text',$this->getObjType()),
207  'meta_data_scheme' => array('text',$this->getMetaDataScheme()),
208  'language' => array('text',$this->getLanguageCode()));
209  }
210 
211  function read()
212  {
213  global $ilDB;
214 
215  include_once 'Services/MetaData/classes/class.ilMDLanguageItem.php';
216 
217 
218  if($this->getMetaId())
219  {
220 
221  $query = "SELECT * FROM il_meta_meta_data ".
222  "WHERE meta_meta_data_id = ".$ilDB->quote($this->getMetaId() ,'integer');
223 
224 
225  $res = $this->db->query($query);
226  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
227  {
228  $this->setRBACId($row->rbac_id);
229  $this->setObjId($row->obj_id);
230  $this->setObjType($row->obj_type);
231  $this->setMetaDataScheme($row->meta_data_scheme);
232  $this->setLanguage(new ilMDLanguageItem($row->language));
233  }
234  return true;
235  }
236  return false;
237  }
238 
239  /*
240  * XML Export of all meta data
241  * @param object (xml writer) see class.ilMD2XML.php
242  *
243  */
244  function toXML(&$writer)
245  {
246  if($this->getMetaDataScheme())
247  {
248  $attr['MetadataScheme'] = $this->getMetaDataScheme();
249  }
250  if($this->getLanguageCode())
251  {
252  $attr['Language'] = $this->getLanguageCode();
253  }
254  $writer->xmlStartTag('Meta-Metadata',$attr ? $attr : null);
255 
256  // ELEMENT IDENTIFIER
257  $identifiers = $this->getIdentifierIds();
258  foreach($identifiers as $id)
259  {
260  $ide =& $this->getIdentifier($id);
261  $ide->toXML($writer);
262  }
263  if(!count($identifiers))
264  {
265  include_once 'Services/Metadata/classes/class.ilMDIdentifier.php';
266  $ide = new ilMDIdentifier($this->getRBACId(),$this->getObjId());
267  $ide->toXML($writer);
268  }
269 
270  // ELEMETN Contribute
271  $contributes = $this->getContributeIds();
272  foreach($contributes as $id)
273  {
274  $con =& $this->getContribute($id);
275  $con->toXML($writer);
276  }
277  if(!count($contributes))
278  {
279  include_once 'Services/MetaData/classes/class.ilMDContribute.php';
280  $con = new ilMDContribute($this->getRBACId(),$this->getObjId());
281  $con->toXML($writer);
282  }
283 
284  $writer->xmlEndTag('Meta-Metadata');
285  }
286 
287  // STATIC
288  function _getId($a_rbac_id,$a_obj_id)
289  {
290  global $ilDB;
291 
292  $query = "SELECT meta_meta_data_id FROM il_meta_meta_data ".
293  "WHERE rbac_id = ".$ilDB->quote($a_rbac_id ,'integer')." ".
294  "AND obj_id = ".$ilDB->quote($a_obj_id ,'integer');
295 
296  $res = $ilDB->query($query);
297  while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
298  {
299  return $row->meta_meta_data_id;
300  }
301  return false;
302  }
303 }
304 ?>