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