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annotate m-toolbox/classes/@plist/applyDefaults.m @ 24:056f8e1e995e database-connection-manager

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author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 % APPLYDEFAULTS apply the default plist to the input plists
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2 %
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3 % CALL:
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4 % plout = applyDefaults(defaultPlist, pl1, pl2, ..., pl3)
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5 % [plout, pl_unused] = applyDefaults(defaultPlist, pl1, pl2, ..., pl3)
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6 %
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7 % The default plist is assumed to be the first one.
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8 %
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9 % The plists are combined and the resulting keys are compared to the keys
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10 % in the default plist. If any key is missing from the default plist a
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11 % warning is issued.
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12 %
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13 % M Hewitson 04-04-11
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14 %
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15 % VERSION $Id: applyDefaults.m,v 1.14 2011/08/16 06:05:37 hewitson Exp $
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16 %
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17
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18 function varargout = applyDefaults(varargin)
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19
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20 inputs = utils.helper.collect_objects(varargin(:), 'plist');
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21
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22 % trivial case
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23 if numel(inputs) == 1
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24 varargout{1} = copy(inputs, true);
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25 return;
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26 end
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27
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28 % Get the default plist and copy it because we modify it by setting the
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29 % user's values
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30 default = copy(inputs(1), true);
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31
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32 % Get the rest
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33 pls = inputs(2:end);
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34
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35 % run the user plists through parse to combine and resolve expressions
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36 userplist = parse(pls, default);
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37
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38 % check keys against default keys
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39 dkeys = default.getKeys;
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40 ukeys = userplist.getKeys;
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41 res = ismember(ukeys, dkeys);
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42 if ~all(res)
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43 warning('The following keys were not found in the default plist and will be ignored: %s', sprintf('[%s] ', ukeys{res==0}));
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44 end
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45
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46 % combine defaults
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47 [default, unused] = overrideDefaults(userplist, default);
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48
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49 % output the used and unused plists
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50 varargout{1} = default;
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51 if nargout >= 2
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52 varargout{2} = unused;
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53 end
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54
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55 end
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56
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57
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58 function [default, unused] = overrideDefaults(userplist, default)
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59
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60 unused = plist();
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61
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62 for kk = 1:numel(userplist.params)
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63
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64 % which key are we acting on
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65 key = userplist.params(kk).key;
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66
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67 % get override value from user
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68 val = userplist.params(kk).val;
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69
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70 % decide what to do based on the presence or not of the parameter in the default plist
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71 if isparam(default, key)
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72 % set the parameter value, taking into account it could be itself a plist object
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73 default.setDefaultForParam(plist('key', key, 'option', val));
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74 else
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75 % append the parameter value, to the unused parameters plist
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76 unused.append(copy(userplist.params(kk), true));
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77 end
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78 end
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79
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80 end