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−% GETXDOC retrieves an object with given id from the LTPDA
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−% repository specified by the input database connection. The object is
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−% converted from its XML text format to an Xdoc. This can then be converted
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−% into an object using the appropriate object constructor.
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−%
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−% Usage: xdoc = getXdoc(conn, id)
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−%
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−% Inputs:
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−%         conn - a database connection object
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−%         id   - the object id
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−%
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−% Outputs:
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−%         xdoc - an Xdoc representation of the object.
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−%
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−% M Hewitson 30-08-07
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−%
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−% $Id: getXdoc.m,v 1.2 2009/06/17 11:05:53 ingo Exp $
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−%
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−%
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−
+
−function xdoc = getXdoc(conn, id)
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−
+
−  xdoc = '';
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−  
+
−  try
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−    results = conn.query(sprintf('select xml from objs where id="%d"', id));
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−    while results.next
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−      objTxt = char(results.getString(1));
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−    end
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−  catch curs
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−    error('### Unable to read xml for ID %d. Server returned %s', id, curs.message);
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−  end
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−
+
−  if ~isempty(objTxt) && ~strcmp(objTxt(:), 'No Data')
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−    % convert to Java string
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−    str = java.lang.String(objTxt);
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−    % open stream on this string
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−    stream = java.io.StringBufferInputStream(str);
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−    % make parser
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−    builder = javax.xml.parsers.DocumentBuilderFactory.newInstance.newDocumentBuilder;
+
−
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−    xdoc = builder.parse(stream);
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−  else
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−    xdoc = [];
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−  end
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−
+
−end
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−