1 | function jv = toJava(v,collection)
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2 | %toJava Convert to Java representation.
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3 | % toJava(v) returns a Java object representing the matlab value v.
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4 | % toJava(v,1) requires the result to be a collection, not a simple object
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5 | % such as java.lang.Double.
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6 | %
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7 | % Conversions:
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8 | % scalar -> java.lang.Double
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9 | % numeric array -> javaArray of Double
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10 | % character array -> java.lang.String or array of same
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11 | % empty array -> java.util.Vector
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12 | % cell array -> javaArray of Objects
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13 | % empty cell array -> java.util.BitSet
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14 | % structure -> java.util.HashTable
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15 | % class -> struct with '_class' property
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16 | %
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17 | % See also fromJava.
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18 |
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19 | % Written by Tom Minka
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20 | % (c) Microsoft Corporation. All rights reserved.
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21 |
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22 | if nargin < 2
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23 | collection = 0;
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24 | end
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25 | % in case v already is a Java object
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26 | jv = v;
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27 | if isnumeric(v)
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28 | if isempty(v)
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29 | jv = java.util.Vector;
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30 | elseif length(v) == 1
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31 | if collection
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32 | jv = javaArray('java.lang.Double',1);
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33 | jv(1) = java.lang.Double(v);
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34 | else
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35 | jv = java.lang.Double(v);
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36 | end
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37 | else
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38 | sz = size(v);
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39 | jv = javaArray('java.lang.Double',sz);
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40 | v = v(:);
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41 | for i = 1:prod(sz)
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42 | index = substruct('()',num2cell(ind2subv(sz,i)));
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43 | subsasgn(jv,index,toJava(v(i)));
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44 | end
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45 | end
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46 | return
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47 | end
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48 | if ischar(v)
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49 | n = rows(v);
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50 | if n == 1 & ~collection
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51 | jv = java.lang.String(v);
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52 | else
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53 | jv = javaArray('java.lang.String',n);
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54 | for i = 1:n
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55 | jv(i) = java.lang.String(deblank(v(i,:)));
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56 | end
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57 | end
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58 | end
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59 | if iscell(v)
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60 | if isempty(v)
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61 | jv = java.util.BitSet;
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62 | else
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63 | sz = size(v);
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64 | jv = javaArray('java.lang.Object',sz);
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65 | v = v(:);
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66 | for i = 1:prod(sz)
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67 | index = substruct('()',num2cell(ind2subv(sz,i)));
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68 | subsasgn(jv,index,toJava(v{i}));
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69 | end
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70 | end
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71 | return
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72 | end
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73 | if isobject(v) | isstruct(v)
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74 | jv = java.util.Hashtable;
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75 | if isobject(v)
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76 | jv.put('_class',class(v));
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77 | v = struct(v);
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78 | end
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79 | % record the order of the fieldnames
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80 | fields = java.util.Vector;
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81 | for f = fieldnames(v)'
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82 | fields.addElement(char(f));
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83 | jv.put(char(f),toJava(getfield(v,char(f))));
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84 | end
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85 | jv.put('_fields',fields);
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86 | return
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87 | end
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