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2 <head>
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3 <title>MayaChemTools:Code:ObjectProperty.pm</title>
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7 <body leftmargin="20" rightmargin="20" topmargin="10" bottommargin="10">
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12 <br/>
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13 <pre>
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14 <a name="package-ObjectProperty-"></a> 1 <span class="k">package </span><span class="i">ObjectProperty</span><span class="sc">;</span>
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15 2 <span class="c">#</span>
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16 3 <span class="c"># $RCSfile: ObjectProperty.pm,v $</span>
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17 4 <span class="c"># $Date: 2015/02/28 20:47:18 $</span>
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18 5 <span class="c"># $Revision: 1.25 $</span>
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19 6 <span class="c">#</span>
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20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span>
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21 8 <span class="c">#</span>
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22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span>
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23 10 <span class="c">#</span>
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24 11 <span class="c"># This file is part of MayaChemTools.</span>
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25 12 <span class="c">#</span>
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26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span>
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27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span>
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28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span>
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29 16 <span class="c"># later version.</span>
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30 17 <span class="c">#</span>
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31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span>
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32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span>
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33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span>
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34 21 <span class="c"># details.</span>
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35 22 <span class="c">#</span>
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36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span>
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37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span>
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38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span>
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39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span>
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40 27 <span class="c">#</span>
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41 28
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42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span>
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43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span>
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44 31
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45 32 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw($AUTOLOAD)</span><span class="sc">;</span>
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46 33
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47 34 <span class="c"># Set property for an object...</span>
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48 <a name="SetProperty-"></a> 35 <span class="k">sub </span><span class="m">SetProperty</span> <span class="s">{</span>
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49 36 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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50 37
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51 38 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="k">defined</span><span class="s">(</span><span class="i">$Name</span><span class="s">)</span> && <span class="k">defined</span><span class="s">(</span><span class="i">$Value</span><span class="s">)</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
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52 39 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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53 40 <span class="s">}</span>
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54 41 <span class="k">return</span> <span class="i">$This</span><span class="i">->_SetProperty</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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55 42 <span class="s">}</span>
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56 43
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57 44 <span class="c"># Set properties for an object...</span>
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58 <a name="SetProperties-"></a> 45 <span class="k">sub </span><span class="m">SetProperties</span> <span class="s">{</span>
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59 46 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">%NamesAndValues</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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60 47 <span class="k">my</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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61 48
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62 49 <span class="k">while</span> <span class="s">(</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span> = <span class="k">each</span> <span class="i">%NamesAndValues</span><span class="s">)</span> <span class="s">{</span>
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63 50 <span class="i">$This</span><span class="i">->_SetProperty</span><span class="s">(</span><span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span><span class="sc">;</span>
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64 51 <span class="s">}</span>
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65 52
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66 53 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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67 54 <span class="s">}</span>
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68 55
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69 56 <span class="c"># Set object property...</span>
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70 <a name="_SetProperty-"></a> 57 <span class="k">sub </span><span class="m">_SetProperty</span> <span class="s">{</span>
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71 58 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="cm">,</span> <span class="i">$Value</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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72 59
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73 60 <span class="i">$This</span>->{<span class="i">$Name</span>} = <span class="i">$Value</span><span class="sc">;</span>
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74 61 <span class="s">}</span>
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75 62
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76 63 <span class="c"># Get property for an object...</span>
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77 <a name="GetProperty-"></a> 64 <span class="k">sub </span><span class="m">GetProperty</span> <span class="s">{</span>
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78 65 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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79 66
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80 67 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$Name</span><span class="s">)</span> <span class="s">{</span>
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81 68 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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82 69 <span class="s">}</span>
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83 70 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetProperty</span><span class="s">(</span><span class="i">$Name</span><span class="s">)</span><span class="sc">;</span>
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84 71 <span class="s">}</span>
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85 72
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86 73 <span class="c"># Get object property...</span>
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87 <a name="_GetProperty-"></a> 74 <span class="k">sub </span><span class="m">_GetProperty</span> <span class="s">{</span>
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88 75 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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89 76
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90 77 <span class="k">if</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$This</span>->{<span class="i">$Name</span>}<span class="s">)</span> <span class="s">{</span>
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91 78 <span class="k">return</span> <span class="i">$This</span>->{<span class="i">$Name</span>}<span class="sc">;</span>
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92 79 <span class="s">}</span>
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93 80 <span class="k">else</span> <span class="s">{</span>
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94 81 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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95 82 <span class="s">}</span>
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96 83 <span class="s">}</span>
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97 84
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98 85 <span class="c"># Does this property exist?</span>
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99 <a name="HasProperty-"></a> 86 <span class="k">sub </span><span class="m">HasProperty</span> <span class="s">{</span>
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100 87 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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101 88
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102 89 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$Name</span><span class="s">)</span> <span class="s">{</span>
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103 90 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span>
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104 91 <span class="s">}</span>
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105 92 <span class="k">return</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$This</span>->{<span class="i">$Name</span>}<span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span>
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106 93 <span class="s">}</span>
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107 94
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108 95 <span class="c"># Delete object property...</span>
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109 <a name="DeleteProperty-"></a> 96 <span class="k">sub </span><span class="m">DeleteProperty</span> <span class="s">{</span>
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110 97 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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111 98
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112 99 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$Name</span><span class="s">)</span> <span class="s">{</span>
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113 100 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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114 101 <span class="s">}</span>
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115 102 <span class="k">return</span> <span class="i">$This</span><span class="i">->_DeleteProperty</span><span class="s">(</span><span class="i">$Name</span><span class="s">)</span><span class="sc">;</span>
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116 103 <span class="s">}</span>
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117 104
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118 105 <span class="c"># Delete object property...</span>
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119 <a name="_DeleteProperty-"></a> 106 <span class="k">sub </span><span class="m">_DeleteProperty</span> <span class="s">{</span>
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120 107 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Name</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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121 108
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122 109 <span class="k">if</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$This</span>->{<span class="i">$Name</span>}<span class="s">)</span> <span class="s">{</span>
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123 110 <span class="k">delete</span> <span class="i">$This</span>->{<span class="i">$Name</span>}<span class="sc">;</span>
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124 111 <span class="s">}</span>
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125 112 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span>
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126 113 <span class="s">}</span>
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127 114
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128 115 <span class="c"># Implements Set<PropertyName> and Get<PropertyName> methods...</span>
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129 <a name="AUTOLOAD-"></a> 116 <span class="k">sub </span><span class="m">AUTOLOAD</span> <span class="s">{</span>
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130 117 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$PropertyValue</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span>
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131 118 <span class="k">my</span><span class="s">(</span><span class="i">$PackageName</span><span class="cm">,</span> <span class="i">$MethodName</span><span class="cm">,</span> <span class="i">$PropertyName</span><span class="cm">,</span> <span class="i">$ThisType</span><span class="s">)</span><span class="sc">;</span>
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132 119
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133 120 <span class="c"># Do a greedy match to make sure package name and method names are</span>
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134 121 <span class="c"># picked up correctly from invocation names containing multiple occurences</span>
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135 122 <span class="c"># of ::. For example: FileIO::SDFileIO::GetFileHandle and so on.</span>
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136 123 <span class="c">#</span>
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137 124 <span class="s">(</span><span class="i">$PackageName</span><span class="cm">,</span> <span class="i">$MethodName</span><span class="s">)</span> = <span class="i">$AUTOLOAD</span> =~ <span class="q">/^(.*)::(.*)$/</span><span class="sc">;</span>
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138 125
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139 126 <span class="k">if</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^(BEGIN|DESTROY)$/</span><span class="s">)</span> <span class="s">{</span>
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140 127 <span class="k">return</span><span class="sc">;</span>
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141 128 <span class="s">}</span>
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142 129
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143 130 <span class="i">$ThisType</span> = <span class="k">ref</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> <span class="k">or</span> <span class="w">croak</span> <span class="q">"Error: Invocation of function ${PackageName}::${MethodName} invocation is not supported: It must be invoked using an object reference..."</span><span class="sc">;</span>
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144 131
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145 132 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Get/</span> || <span class="i">$MethodName</span> =~ <span class="q">/^Set/</span> || <span class="i">$MethodName</span> =~ <span class="q">/^Delete/</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
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146 133 <span class="w">croak</span> <span class="q">"Error: Can't locate object method \"$MethodName\" via package \"$ThisType\": This method is not automatically implemented by AUTOLOAD: Only Get<PropertyName>, Set<PropertyName> and Delete<PropertyName> functions are implemented via AUTOLOAD..."</span><span class="sc">;</span>
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147 134 <span class="s">}</span>
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148 135 <span class="k">if</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Delete/</span><span class="s">)</span> <span class="s">{</span>
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149 136 <span class="s">(</span><span class="i">$PropertyName</span><span class="s">)</span> = <span class="i">$MethodName</span> =~ <span class="q">/^Delete(.*?)$/</span><span class="sc">;</span>
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150 137 <span class="s">}</span>
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151 138 <span class="k">else</span> <span class="s">{</span>
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152 139 <span class="s">(</span><span class="i">$PropertyName</span><span class="s">)</span> = <span class="i">$MethodName</span> =~ <span class="q">/^[SG]et(.*?)$/</span><span class="sc">;</span>
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153 140 <span class="s">}</span>
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154 141 <span class="k">if</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Set/</span> && !<span class="k">defined</span><span class="s">(</span><span class="i">$PropertyValue</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span>
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155 142 <span class="w">carp</span> <span class="q">"Warning: ${PackageName}::${MethodName}: Didn't set value for property $PropertyName: Property value for must be specified...\n"</span><span class="sc">;</span>
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156 143 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span>
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157 144 <span class="s">}</span>
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158 145
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159 146 <span class="k">if</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Get/</span><span class="s">)</span> <span class="s">{</span>
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160 147 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetProperty</span><span class="s">(</span><span class="i">$PropertyName</span><span class="s">)</span><span class="sc">;</span>
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161 148 <span class="s">}</span>
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162 149 <span class="k">elsif</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Set/</span><span class="s">)</span> <span class="s">{</span>
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163 150 <span class="k">return</span> <span class="i">$This</span><span class="i">->_SetProperty</span><span class="s">(</span><span class="i">$PropertyName</span><span class="cm">,</span> <span class="i">$PropertyValue</span><span class="s">)</span><span class="sc">;</span>
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164 151 <span class="s">}</span>
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165 152 <span class="k">elsif</span> <span class="s">(</span><span class="i">$MethodName</span> =~ <span class="q">/^Delete/</span><span class="s">)</span> <span class="s">{</span>
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166 153 <span class="k">return</span> <span class="i">$This</span><span class="i">->_DeleteProperty</span><span class="s">(</span><span class="i">$PropertyName</span><span class="s">)</span><span class="sc">;</span>
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167 154 <span class="s">}</span>
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168 155
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169 156 <span class="s">}</span>
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170 157
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171 <a name="EOF-"></a></pre>
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172 <p> </p>
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173 <br />
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174 <center>
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175 <img src="../../../images/h2o2.png">
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176 </center>
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177 </body>
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178 </html>
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