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−function id = updateObjMetadataV1(conn, obj, objid)
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−% an utility to update entries for various object metadata in the
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−% corresponding tables. uses the old v2.1 database schema.
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−%
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−% MUST BE KEPT IN SYNC WITH insertObjMetadataV1()
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−%
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−% conn   - Java database connection object
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−% obj    - object
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−% objid  - unique ID of the object in the database
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−%
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−
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−  import utils.const.*
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−
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−  if nargin < 3
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−    error('### incorrect usage');
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−  end
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−  if ~isjava(conn)
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−    error('### incorrect usage');
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−  end
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−
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−  % default return value
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−  id = [];
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−  
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−  % class of object
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−  cl = class(obj);
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−  utils.helper.msg(msg.PROC2, 'making meta data entry for %s object', cl);
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−
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−  switch cl
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−    case 'ao'
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−
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−      % get data type and id
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−      stmt = conn.prepareStatement(...
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−        'SELECT data_id, data_type FROM ao WHERE obj_id = ?');
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−      stmt.setObject(1, objid);
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−      rs = stmt.executeQuery();
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−      rs.next();
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−      dataid = rs.getInt(1);
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−      datatype = rs.getString(2);
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−      rs.close();
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−      stmt.close();
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−      
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−      % check if the data type is consistent
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−      if ~strcmp(datatype, class(obj.data))
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−        error('### cannot update an object with one having a different data type');
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−      end
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−        
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−      % call recursively to insert the data object info
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−      id = utils.repository.updateObjMetadataV1(conn, obj.data, dataid);
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−
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−      % update ao description
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−      stmt = conn.prepareStatement(...
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−        'UPDATE ao SET description=? WHERE obj_id = ?');
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−      desc = obj.description;
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−      if length(desc)>65535
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−        warning('Object description length exceeded. Truncating to 65535 characters');
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−        desc = desc(1:65535);
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−      end
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−      stmt.setObject(1, desc);
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−      stmt.setObject(2, objid);
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'cdata'
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−
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−      stmt = conn.prepareStatement(...
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−        'UPDATE cdata SET yunits=? WHERE id = ?');
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−      stmt.setObject(1, char(obj.yunits));
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−      stmt.setObject(2, objid);
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'fsdata'
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−
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−      % possible bad entries
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−      fs = obj.fs;
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−      if ~isfinite(fs)
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−        fs = [];
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−      end
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−        
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−      stmt = conn.prepareStatement(...
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−        'UPDATE fsdata SET xunits=?, yunits=?, fs=? WHERE id = ?');
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−      stmt.setObject(1, char(obj.xunits));
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−      stmt.setObject(2, char(obj.yunits));
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−      stmt.setObject(3, fs);
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−      stmt.setObject(4, objid);      
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'tsdata'
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−
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−      stmt = conn.prepareStatement(...
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−        'UPDATE tsdata SET xunits=?, yunits=?, fs=?, t0=?, nsecs=? WHERE id = ?');
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−      stmt.setObject(1, char(obj.xunits));
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−      stmt.setObject(2, char(obj.yunits));
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−      stmt.setObject(3, obj.fs);
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−      stmt.setObject(4, format(obj.t0, 'yyyy-mm-dd HH:MM:SS', 'UTC'));
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−      stmt.setObject(5, obj.nsecs);
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−      stmt.setObject(6, objid);      
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'xydata'
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−
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−      stmt = conn.prepareStatement(...
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−        'UPDATE xydata SET xunits=?, yunits=? WHERE id = ?');
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−      stmt.setObject(1, char(obj.xunits));
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−      stmt.setObject(2, char(obj.yunits));
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−      stmt.setObject(3, objid);      
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'mfir'
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−
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−      stmt = conn.prepareStatement(...
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−        'UPDATE mfir SET in_file=?, fs=? WHERE obj_id = ?');
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−      stmt.setObject(1, obj.infile);
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−      stmt.setObject(2, obj.fs);
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−      stmt.setObject(3, objid);
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−      stmt.execute();
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−      stmt.close();
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−
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−    case 'miir'
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−
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−      stmt = conn.prepareStatement(...
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−        'UPDATE miir SET in_file=?, fs=? WHERE obj_id = ?');
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−      stmt.setObject(1, obj.infile);
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−      stmt.setObject(2, obj.fs);
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−      stmt.setObject(3, objid);      
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−      stmt.execute();
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−      stmt.close();
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−
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−    otherwise
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−      utils.helper.msg(msg.PROC2, 'no meta data table for %s object', cl);
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−
+
−  end
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−
+
−end