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| author | deepakjadmin |
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| date | Wed, 20 Jan 2016 09:23:18 -0500 |
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| -1:000000000000 | 0:4816e4a8ae95 |
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| 1 <html> | |
| 2 <head> | |
| 3 <title>MayaChemTools:Code:Graph::Path.pm</title> | |
| 4 <meta http-equiv="content-type" content="text/html;charset=utf-8"> | |
| 5 <link rel="stylesheet" type="text/css" href="../../../css/MayaChemToolsCode.css"> | |
| 6 </head> | |
| 7 <body leftmargin="20" rightmargin="20" topmargin="10" bottommargin="10"> | |
| 8 <br/> | |
| 9 <center> | |
| 10 <a href="http://www.mayachemtools.org" title="MayaChemTools Home"><img src="../../../images/MayaChemToolsLogo.gif" border="0" alt="MayaChemTools"></a> | |
| 11 </center> | |
| 12 <br/> | |
| 13 <pre> | |
| 14 <a name="package-Graph::Path-"></a> 1 <span class="k">package </span><span class="i">Graph::Path</span><span class="sc">;</span> | |
| 15 2 <span class="c">#</span> | |
| 16 3 <span class="c"># $RCSfile: Path.pm,v $</span> | |
| 17 4 <span class="c"># $Date: 2015/02/28 20:49:06 $</span> | |
| 18 5 <span class="c"># $Revision: 1.25 $</span> | |
| 19 6 <span class="c">#</span> | |
| 20 7 <span class="c"># Author: Manish Sud <msud@san.rr.com></span> | |
| 21 8 <span class="c">#</span> | |
| 22 9 <span class="c"># Copyright (C) 2015 Manish Sud. All rights reserved.</span> | |
| 23 10 <span class="c">#</span> | |
| 24 11 <span class="c"># This file is part of MayaChemTools.</span> | |
| 25 12 <span class="c">#</span> | |
| 26 13 <span class="c"># MayaChemTools is free software; you can redistribute it and/or modify it under</span> | |
| 27 14 <span class="c"># the terms of the GNU Lesser General Public License as published by the Free</span> | |
| 28 15 <span class="c"># Software Foundation; either version 3 of the License, or (at your option) any</span> | |
| 29 16 <span class="c"># later version.</span> | |
| 30 17 <span class="c">#</span> | |
| 31 18 <span class="c"># MayaChemTools is distributed in the hope that it will be useful, but without</span> | |
| 32 19 <span class="c"># any warranty; without even the implied warranty of merchantability of fitness</span> | |
| 33 20 <span class="c"># for a particular purpose. See the GNU Lesser General Public License for more</span> | |
| 34 21 <span class="c"># details.</span> | |
| 35 22 <span class="c">#</span> | |
| 36 23 <span class="c"># You should have received a copy of the GNU Lesser General Public License</span> | |
| 37 24 <span class="c"># along with MayaChemTools; if not, see <http://www.gnu.org/licenses/> or</span> | |
| 38 25 <span class="c"># write to the Free Software Foundation Inc., 59 Temple Place, Suite 330,</span> | |
| 39 26 <span class="c"># Boston, MA, 02111-1307, USA.</span> | |
| 40 27 <span class="c">#</span> | |
| 41 28 | |
| 42 29 <span class="k">use</span> <span class="w">strict</span><span class="sc">;</span> | |
| 43 30 <span class="k">use</span> <span class="w">Carp</span><span class="sc">;</span> | |
| 44 31 <span class="k">use</span> <span class="w">Exporter</span><span class="sc">;</span> | |
| 45 32 <span class="k">use</span> <span class="w">Storable</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 46 33 <span class="k">use</span> <span class="w">Scalar::Util</span> <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 47 34 | |
| 48 35 <span class="k">use</span> <span class="w">vars</span> <span class="q">qw(@ISA @EXPORT @EXPORT_OK %EXPORT_TAGS)</span><span class="sc">;</span> | |
| 49 36 | |
| 50 37 <span class="i">@ISA</span> = <span class="q">qw(Exporter)</span><span class="sc">;</span> | |
| 51 38 <span class="i">@EXPORT</span> = <span class="q">qw()</span><span class="sc">;</span> | |
| 52 39 <span class="i">@EXPORT_OK</span> = <span class="q">qw()</span><span class="sc">;</span> | |
| 53 40 | |
| 54 41 <span class="i">%EXPORT_TAGS</span> = <span class="s">(</span><span class="w">all</span> <span class="cm">=></span> <span class="s">[</span><span class="i">@EXPORT</span><span class="cm">,</span> <span class="i">@EXPORT_OK</span><span class="s">]</span><span class="s">)</span><span class="sc">;</span> | |
| 55 42 | |
| 56 43 <span class="c"># Setup class variables...</span> | |
| 57 44 <span class="k">my</span><span class="s">(</span><span class="i">$ClassName</span><span class="cm">,</span> <span class="i">$ObjectID</span><span class="s">)</span><span class="sc">;</span> | |
| 58 45 <span class="i">_InitializeClass</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 59 46 | |
| 60 47 <span class="c"># Overload Perl functions...</span> | |
| 61 48 <span class="k">use</span> <span class="w">overload</span> <span class="q">'""'</span> <span class="cm">=></span> <span class="q">'StringifyPath'</span><span class="cm">,</span> | |
| 62 49 | |
| 63 50 <span class="q">'=='</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span> | |
| 64 51 <span class="q">'eq'</span> <span class="cm">=></span> <span class="q">'_PathEqualOperator'</span><span class="cm">,</span> | |
| 65 52 | |
| 66 53 <span class="q">'fallback'</span> <span class="cm">=></span> <span class="k">undef</span><span class="sc">;</span> | |
| 67 54 | |
| 68 55 <span class="c"># Class constructor...</span> | |
| 69 <a name="new-"></a> 56 <span class="k">sub </span><span class="m">new</span> <span class="s">{</span> | |
| 70 57 <span class="k">my</span><span class="s">(</span><span class="i">$Class</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 71 58 | |
| 72 59 <span class="c"># Initialize object...</span> | |
| 73 60 <span class="k">my</span> <span class="i">$This</span> = <span class="s">{</span><span class="s">}</span><span class="sc">;</span> | |
| 74 61 <span class="k">bless</span> <span class="i">$This</span><span class="cm">,</span> <span class="k">ref</span><span class="s">(</span><span class="i">$Class</span><span class="s">)</span> || <span class="i">$Class</span><span class="sc">;</span> | |
| 75 62 <span class="i">$This</span><span class="i">->_InitializePath</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 76 63 | |
| 77 64 <span class="k">if</span> <span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> <span class="i">$This</span><span class="i">->AddVertices</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span> <span class="s">}</span> | |
| 78 65 | |
| 79 66 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 80 67 <span class="s">}</span> | |
| 81 68 | |
| 82 69 <span class="c"># Initialize object data...</span> | |
| 83 70 <span class="c">#</span> | |
| 84 <a name="_InitializePath-"></a> 71 <span class="k">sub </span><span class="m">_InitializePath</span> <span class="s">{</span> | |
| 85 72 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 86 73 | |
| 87 74 <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 88 75 <span class="s">}</span> | |
| 89 76 | |
| 90 77 <span class="c"># Initialize class ...</span> | |
| 91 <a name="_InitializeClass-"></a> 78 <span class="k">sub </span><span class="m">_InitializeClass</span> <span class="s">{</span> | |
| 92 79 <span class="c">#Class name...</span> | |
| 93 80 <span class="i">$ClassName</span> = <span class="w">__PACKAGE__</span><span class="sc">;</span> | |
| 94 81 <span class="s">}</span> | |
| 95 82 | |
| 96 83 <span class="c"># Add a vertex to path after the end vertex...</span> | |
| 97 84 <span class="c">#</span> | |
| 98 <a name="AddVertex-"></a> 85 <span class="k">sub </span><span class="m">AddVertex</span> <span class="s">{</span> | |
| 99 86 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 100 87 | |
| 101 88 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$VertexID</span> <span class="s">)</span> <span class="s">{</span> | |
| 102 89 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span> | |
| 103 90 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 104 91 <span class="s">}</span> | |
| 105 92 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span> | |
| 106 93 | |
| 107 94 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 108 95 <span class="s">}</span> | |
| 109 96 | |
| 110 97 <span class="c"># Add vertices to the path after the end vertex...</span> | |
| 111 98 <span class="c">#</span> | |
| 112 <a name="AddVertices-"></a> 99 <span class="k">sub </span><span class="m">AddVertices</span> <span class="s">{</span> | |
| 113 100 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 114 101 | |
| 115 102 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> | |
| 116 103 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->AddVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span> | |
| 117 104 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 118 105 <span class="s">}</span> | |
| 119 106 <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span> | |
| 120 107 | |
| 121 108 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 122 109 <span class="s">}</span> | |
| 123 110 | |
| 124 111 <span class="c"># Add a vertex to path after the end vertex...</span> | |
| 125 112 <span class="c">#</span> | |
| 126 <a name="PushVertex-"></a> 113 <span class="k">sub </span><span class="m">PushVertex</span> <span class="s">{</span> | |
| 127 114 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 128 115 | |
| 129 116 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertex</span><span class="s">(</span><span class="i">$VertexID</span><span class="s">)</span><span class="sc">;</span> | |
| 130 117 <span class="s">}</span> | |
| 131 118 | |
| 132 119 <span class="c"># Add vertices to the path after the end vertex...</span> | |
| 133 120 <span class="c">#</span> | |
| 134 <a name="PushVertices-"></a> 121 <span class="k">sub </span><span class="m">PushVertices</span> <span class="s">{</span> | |
| 135 122 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 136 123 | |
| 137 124 <span class="k">return</span> <span class="i">$This</span><span class="i">->AddVertices</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span> | |
| 138 125 <span class="s">}</span> | |
| 139 126 | |
| 140 127 <span class="c"># Remove end vertex from path...</span> | |
| 141 128 <span class="c">#</span> | |
| 142 <a name="PopVertex-"></a> 129 <span class="k">sub </span><span class="m">PopVertex</span> <span class="s">{</span> | |
| 143 130 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 144 131 | |
| 145 132 <span class="k">if</span> <span class="s">(</span>!<span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span> <span class="s">{</span> | |
| 146 133 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->PopVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span> | |
| 147 134 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 148 135 <span class="s">}</span> | |
| 149 136 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 150 137 | |
| 151 138 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 152 139 <span class="s">}</span> | |
| 153 140 | |
| 154 141 <span class="c"># Remove start vertex from path...</span> | |
| 155 142 <span class="c">#</span> | |
| 156 <a name="ShiftVertex-"></a> 143 <span class="k">sub </span><span class="m">ShiftVertex</span> <span class="s">{</span> | |
| 157 144 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 158 145 | |
| 159 146 <span class="k">if</span> <span class="s">(</span>!<span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span> <span class="s">{</span> | |
| 160 147 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->ShiftVertex: No vertex removed: Path is empty..."</span><span class="sc">;</span> | |
| 161 148 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 162 149 <span class="s">}</span> | |
| 163 150 <span class="k">shift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 164 151 | |
| 165 152 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 166 153 <span class="s">}</span> | |
| 167 154 | |
| 168 155 <span class="c"># Add a vertex to path before the start vertex...</span> | |
| 169 156 <span class="c">#</span> | |
| 170 <a name="UnshiftVertex-"></a> 157 <span class="k">sub </span><span class="m">UnshiftVertex</span> <span class="s">{</span> | |
| 171 158 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$VertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 172 159 | |
| 173 160 <span class="k">if</span> <span class="s">(</span>!<span class="k">defined</span> <span class="i">$VertexID</span> <span class="s">)</span> <span class="s">{</span> | |
| 174 161 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertex: No vertex added: Vertex ID must be specified..."</span><span class="sc">;</span> | |
| 175 162 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 176 163 <span class="s">}</span> | |
| 177 164 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">$VertexID</span><span class="sc">;</span> | |
| 178 165 | |
| 179 166 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 180 167 <span class="s">}</span> | |
| 181 168 | |
| 182 169 <span class="c"># Add vertices to the path before the start vertex...</span> | |
| 183 170 <span class="c">#</span> | |
| 184 <a name="UnshiftVertices-"></a> 171 <span class="k">sub </span><span class="m">UnshiftVertices</span> <span class="s">{</span> | |
| 185 172 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@VertexIDs</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 186 173 | |
| 187 174 <span class="k">if</span> <span class="s">(</span>!<span class="i">@VertexIDs</span><span class="s">)</span> <span class="s">{</span> | |
| 188 175 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->UnshiftVertices: No vertices added: Vertices list is empty..."</span><span class="sc">;</span> | |
| 189 176 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 190 177 <span class="s">}</span> | |
| 191 178 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@VertexIDs</span><span class="sc">;</span> | |
| 192 179 | |
| 193 180 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 194 181 <span class="s">}</span> | |
| 195 182 | |
| 196 183 <span class="c"># Get length...</span> | |
| 197 184 <span class="c">#</span> | |
| 198 <a name="GetLength-"></a> 185 <span class="k">sub </span><span class="m">GetLength</span> <span class="s">{</span> | |
| 199 186 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 200 187 | |
| 201 188 <span class="k">return</span> <span class="k">scalar</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 202 189 <span class="s">}</span> | |
| 203 190 | |
| 204 191 <span class="c"># Get start vertex...</span> | |
| 205 192 <span class="c">#</span> | |
| 206 <a name="GetStartVertex-"></a> 193 <span class="k">sub </span><span class="m">GetStartVertex</span> <span class="s">{</span> | |
| 207 194 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 208 195 | |
| 209 196 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 210 197 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 211 198 <span class="s">}</span> | |
| 212 199 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span> = <span class="n">0</span><span class="sc">;</span> | |
| 213 200 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span> | |
| 214 201 <span class="s">}</span> | |
| 215 202 | |
| 216 203 <span class="c"># Get end vertex...</span> | |
| 217 204 <span class="c">#</span> | |
| 218 <a name="GetEndVertex-"></a> 205 <span class="k">sub </span><span class="m">GetEndVertex</span> <span class="s">{</span> | |
| 219 206 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 220 207 | |
| 221 208 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 222 209 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 223 210 <span class="s">}</span> | |
| 224 211 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span> | |
| 225 212 | |
| 226 213 <span class="i">$Index</span> = <span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> - <span class="n">1</span><span class="sc">;</span> | |
| 227 214 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span> | |
| 228 215 <span class="s">}</span> | |
| 229 216 | |
| 230 217 <span class="c"># Get start and end vertices...</span> | |
| 231 218 <span class="c">#</span> | |
| 232 <a name="GetTerminalVertices-"></a> 219 <span class="k">sub </span><span class="m">GetTerminalVertices</span> <span class="s">{</span> | |
| 233 220 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 234 221 | |
| 235 222 <span class="k">return</span> <span class="s">(</span> <span class="i">$This</span><span class="i">->GetStartVertex</span><span class="s">(</span><span class="s">)</span><span class="cm">,</span> <span class="i">$This</span><span class="i">->GetEndVertex</span><span class="s">(</span><span class="s">)</span> <span class="s">)</span><span class="cm">,</span> | |
| 236 223 <span class="s">}</span> | |
| 237 224 | |
| 238 225 <span class="c"># Get path vertices...</span> | |
| 239 226 <span class="c">#</span> | |
| 240 <a name="GetVertices-"></a> 227 <span class="k">sub </span><span class="m">GetVertices</span> <span class="s">{</span> | |
| 241 228 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 242 229 | |
| 243 230 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} <span class="co">:</span> <span class="k">scalar</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 244 231 <span class="s">}</span> | |
| 245 232 | |
| 246 233 <span class="c"># Get a specific vertex from path with indicies starting from 0...</span> | |
| 247 234 <span class="c">#</span> | |
| 248 <a name="GetVertex-"></a> 235 <span class="k">sub </span><span class="m">GetVertex</span> <span class="s">{</span> | |
| 249 236 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Index</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 250 237 | |
| 251 238 <span class="k">if</span> <span class="s">(</span><span class="i">$Index</span> < <span class="n">0</span><span class="s">)</span> <span class="s">{</span> | |
| 252 239 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->GetValue: Index value must be a positive number..."</span><span class="sc">;</span> | |
| 253 240 <span class="s">}</span> | |
| 254 241 <span class="k">if</span> <span class="s">(</span><span class="i">$Index</span> >= <span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 255 242 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->GetValue: Index vaue must be less than length of path..."</span><span class="sc">;</span> | |
| 256 243 <span class="s">}</span> | |
| 257 244 <span class="k">if</span> <span class="s">(</span>!<span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 258 245 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 259 246 <span class="s">}</span> | |
| 260 247 <span class="k">return</span> <span class="i">$This</span><span class="i">->_GetVertex</span><span class="s">(</span><span class="i">$Index</span><span class="s">)</span><span class="sc">;</span> | |
| 261 248 <span class="s">}</span> | |
| 262 249 | |
| 263 250 <span class="c"># Get a vertex...</span> | |
| 264 251 <span class="c">#</span> | |
| 265 <a name="_GetVertex-"></a> 252 <span class="k">sub </span><span class="m">_GetVertex</span> <span class="s">{</span> | |
| 266 253 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Index</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 267 254 | |
| 268 255 <span class="k">return</span> <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span>]<span class="sc">;</span> | |
| 269 256 <span class="s">}</span> | |
| 270 257 | |
| 271 258 <span class="c"># Get path edges as pair of vertices or number of edges...</span> | |
| 272 259 <span class="c">#</span> | |
| 273 <a name="GetEdges-"></a> 260 <span class="k">sub </span><span class="m">GetEdges</span> <span class="s">{</span> | |
| 274 261 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 275 262 | |
| 276 263 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span> < <span class="n">1</span><span class="s">)</span> <span class="s">{</span> | |
| 277 264 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 278 265 <span class="s">}</span> | |
| 279 266 <span class="c"># Set up edges...</span> | |
| 280 267 <span class="k">my</span><span class="s">(</span><span class="i">$Index</span><span class="cm">,</span> <span class="i">$VertexID1</span><span class="cm">,</span> <span class="i">$VertexID2</span><span class="cm">,</span> <span class="i">@Vertices</span><span class="cm">,</span> <span class="i">@Edges</span><span class="s">)</span><span class="sc">;</span> | |
| 281 268 | |
| 282 269 <span class="i">@Edges</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 283 270 <span class="k">for</span> <span class="i">$Index</span> <span class="s">(</span><span class="n">0</span> .. <span class="s">(</span><span class="i">$#</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} - <span class="n">1</span><span class="s">)</span> <span class="s">)</span> <span class="s">{</span> | |
| 284 271 <span class="i">$VertexID1</span> = <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span>]<span class="sc">;</span> | |
| 285 272 <span class="i">$VertexID2</span> = <span class="i">$This</span>->{<span class="w">Vertices</span>}[<span class="i">$Index</span> + <span class="n">1</span>]<span class="sc">;</span> | |
| 286 273 <span class="k">push</span> <span class="i">@Edges</span><span class="cm">,</span> <span class="s">(</span><span class="i">$VertexID1</span><span class="cm">,</span> <span class="i">$VertexID2</span><span class="s">)</span><span class="sc">;</span> | |
| 287 274 <span class="s">}</span> | |
| 288 275 | |
| 289 276 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@Edges</span> <span class="co">:</span> <span class="s">(</span><span class="s">(</span><span class="k">scalar</span> <span class="i">@Edges</span><span class="s">)</span>/<span class="n">2</span><span class="s">)</span><span class="sc">;</span> | |
| 290 277 <span class="s">}</span> | |
| 291 278 | |
| 292 279 <span class="c"># Is it a cycle?</span> | |
| 293 280 <span class="c">#</span> | |
| 294 <a name="IsCycle-"></a> 281 <span class="k">sub </span><span class="m">IsCycle</span> <span class="s">{</span> | |
| 295 282 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 296 283 <span class="k">my</span><span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span><span class="sc">;</span> | |
| 297 284 | |
| 298 285 <span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span> = <span class="i">$This</span><span class="i">->GetTerminalVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 299 286 | |
| 300 287 <span class="k">return</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$EndVertex</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span> | |
| 301 288 <span class="s">}</span> | |
| 302 289 | |
| 303 290 <span class="c"># For a path to be an independent path, it must meet the following conditions:</span> | |
| 304 291 <span class="c"># . All other vertices are unique.</span> | |
| 305 292 <span class="c">#</span> | |
| 306 <a name="IsIndependentPath-"></a> 293 <span class="k">sub </span><span class="m">IsIndependentPath</span> <span class="s">{</span> | |
| 307 294 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 308 295 | |
| 309 296 <span class="c"># Make sure it has at least two vertices...</span> | |
| 310 297 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> < <span class="n">2</span><span class="s">)</span> <span class="s">{</span> | |
| 311 298 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span> | |
| 312 299 <span class="s">}</span> | |
| 313 300 | |
| 314 301 <span class="c"># Check frequency of occurence for non-terminal vertices...</span> | |
| 315 302 <span class="k">my</span><span class="s">(</span><span class="i">$VertexID</span><span class="cm">,</span> <span class="i">$IndependenceStatus</span><span class="cm">,</span> <span class="i">@Vertices</span><span class="cm">,</span> <span class="i">%VerticesMap</span><span class="s">)</span><span class="sc">;</span> | |
| 316 303 | |
| 317 304 <span class="i">@Vertices</span> = <span class="i">$This</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 318 305 <span class="k">shift</span> <span class="i">@Vertices</span><span class="sc">;</span> <span class="k">pop</span> <span class="i">@Vertices</span><span class="sc">;</span> | |
| 319 306 | |
| 320 307 <span class="i">%VerticesMap</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 321 308 <span class="i">$IndependenceStatus</span> = <span class="n">1</span><span class="sc">;</span> | |
| 322 309 | |
| 323 310 <span class="j">VERTEXID:</span> <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">@Vertices</span><span class="s">)</span> <span class="s">{</span> | |
| 324 311 <span class="k">if</span> <span class="s">(</span><span class="k">exists</span> <span class="i">$VerticesMap</span>{<span class="i">$VertexID</span>} <span class="s">)</span> <span class="s">{</span> | |
| 325 312 <span class="i">$IndependenceStatus</span> = <span class="n">0</span><span class="sc">;</span> | |
| 326 313 <span class="k">last</span> <span class="j">VERTEXID</span><span class="sc">;</span> | |
| 327 314 <span class="s">}</span> | |
| 328 315 <span class="i">$VerticesMap</span>{<span class="i">$VertexID</span>} = <span class="i">$VertexID</span><span class="sc">;</span> | |
| 329 316 <span class="s">}</span> | |
| 330 317 <span class="k">return</span> <span class="i">$IndependenceStatus</span><span class="sc">;</span> | |
| 331 318 <span class="s">}</span> | |
| 332 319 | |
| 333 320 <span class="c"># For a path to be an independent cyclic path, it must meet the following conditions:</span> | |
| 334 321 <span class="c"># . Termimal vertices are the same</span> | |
| 335 322 <span class="c"># . All other vertices are unique.</span> | |
| 336 323 <span class="c">#</span> | |
| 337 <a name="IsIndependentCyclicPath-"></a> 324 <span class="k">sub </span><span class="m">IsIndependentCyclicPath</span> <span class="s">{</span> | |
| 338 325 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 339 326 | |
| 340 327 <span class="c"># Make sure it's a cycle...</span> | |
| 341 328 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> >= <span class="n">3</span> && <span class="i">$This</span><span class="i">->IsCycle</span><span class="s">(</span><span class="s">)</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 342 329 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span> | |
| 343 330 <span class="s">}</span> | |
| 344 331 <span class="k">return</span> <span class="i">$This</span><span class="i">->IsIndependentPath</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 345 332 <span class="s">}</span> | |
| 346 333 | |
| 347 334 <span class="c"># Is it a path object?</span> | |
| 348 <a name="IsPath-"></a> 335 <span class="k">sub </span><span class="m">IsPath ($)</span> <span class="s">{</span> | |
| 349 336 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 350 337 | |
| 351 338 <span class="k">return</span> <span class="i">_IsPath</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span><span class="sc">;</span> | |
| 352 339 <span class="s">}</span> | |
| 353 340 | |
| 354 341 <span class="c"># Copy path...</span> | |
| 355 342 <span class="c">#</span> | |
| 356 <a name="Copy-"></a> 343 <span class="k">sub </span><span class="m">Copy</span> <span class="s">{</span> | |
| 357 344 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 358 345 <span class="k">my</span><span class="s">(</span><span class="i">$NewPath</span><span class="s">)</span><span class="sc">;</span> | |
| 359 346 | |
| 360 347 <span class="i">$NewPath</span> = <span class="i">Storable::dclone</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span><span class="sc">;</span> | |
| 361 348 | |
| 362 349 <span class="k">return</span> <span class="i">$NewPath</span><span class="sc">;</span> | |
| 363 350 <span class="s">}</span> | |
| 364 351 | |
| 365 352 <span class="c"># Reverse order of vertices in path...</span> | |
| 366 353 <span class="c">#</span> | |
| 367 <a name="Reverse-"></a> 354 <span class="k">sub </span><span class="m">Reverse</span> <span class="s">{</span> | |
| 368 355 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 369 356 <span class="k">my</span><span class="s">(</span><span class="i">@VertexIDs</span><span class="s">)</span><span class="sc">;</span> | |
| 370 357 | |
| 371 358 <span class="i">@VertexIDs</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> <span class="k">push</span> <span class="i">@VertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 372 359 | |
| 373 360 <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}} = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> <span class="k">push</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@VertexIDs</span><span class="sc">;</span> | |
| 374 361 | |
| 375 362 <span class="k">return</span> <span class="i">$This</span><span class="sc">;</span> | |
| 376 363 <span class="s">}</span> | |
| 377 364 | |
| 378 365 <span class="c"># Get vertices common between two paths...</span> | |
| 379 366 <span class="c">#</span> | |
| 380 <a name="GetCommonVertices-"></a> 367 <span class="k">sub </span><span class="m">GetCommonVertices</span> <span class="s">{</span> | |
| 381 368 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 382 369 <span class="k">my</span><span class="s">(</span><span class="i">$VertexID</span><span class="cm">,</span> <span class="i">@CommonVertices</span><span class="cm">,</span> <span class="i">%OtherVerticesMap</span><span class="s">)</span><span class="sc">;</span> | |
| 383 370 | |
| 384 371 <span class="c"># Setup a vertices hash for a quick look up...</span> | |
| 385 372 <span class="i">%OtherVerticesMap</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 386 373 <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">$Other</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 387 374 <span class="i">$OtherVerticesMap</span>{<span class="i">$VertexID</span>} = <span class="i">$VertexID</span><span class="sc">;</span> | |
| 388 375 <span class="s">}</span> | |
| 389 376 | |
| 390 377 <span class="i">@CommonVertices</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 391 378 <span class="k">for</span> <span class="i">$VertexID</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetVertices</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 392 379 <span class="k">if</span> <span class="s">(</span><span class="i">$OtherVerticesMap</span>{<span class="i">$VertexID</span>}<span class="s">)</span> <span class="s">{</span> | |
| 393 380 <span class="k">push</span> <span class="i">@CommonVertices</span><span class="cm">,</span> <span class="i">$VertexID</span> | |
| 394 381 <span class="s">}</span> | |
| 395 382 <span class="s">}</span> | |
| 396 383 <span class="k">return</span> <span class="k">wantarray</span> ? <span class="i">@CommonVertices</span> <span class="co">:</span> <span class="k">scalar</span> <span class="i">@CommonVertices</span><span class="sc">;</span> | |
| 397 384 <span class="s">}</span> | |
| 398 385 | |
| 399 386 <span class="c"># Join the existing path with a new path specifed using a path object of a list of</span> | |
| 400 387 <span class="c"># verticies.</span> | |
| 401 388 <span class="c">#</span> | |
| 402 <a name="Join-"></a> 389 <span class="k">sub </span><span class="m">Join</span> <span class="s">{</span> | |
| 403 390 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@Values</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 404 391 | |
| 405 392 <span class="k">return</span> <span class="i">$This</span><span class="i">->_Join</span><span class="s">(</span><span class="i">@Values</span><span class="s">)</span><span class="sc">;</span> | |
| 406 393 <span class="s">}</span> | |
| 407 394 | |
| 408 395 <span class="c"># Join the existing path with a new path specifed using a path object at a specified</span> | |
| 409 396 <span class="c"># vertex.</span> | |
| 410 397 <span class="c">#</span> | |
| 411 <a name="JoinAtVertex-"></a> 398 <span class="k">sub </span><span class="m">JoinAtVertex</span> <span class="s">{</span> | |
| 412 399 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="cm">,</span> <span class="i">$CenterVertexID</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 413 400 | |
| 414 401 <span class="c"># Make sure CenterVertexID is end vertex in This and start vertex in Other before</span> | |
| 415 402 <span class="c"># joining them...</span> | |
| 416 403 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetEndVertex</span><span class="s">(</span><span class="s">)</span> != <span class="i">$CenterVertexID</span><span class="s">)</span> <span class="s">{</span> | |
| 417 404 <span class="i">$This</span><span class="i">->Reverse</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 418 405 <span class="s">}</span> | |
| 419 406 <span class="k">if</span> <span class="s">(</span><span class="i">$Other</span><span class="i">->GetStartVertex</span><span class="s">(</span><span class="s">)</span> != <span class="i">$CenterVertexID</span><span class="s">)</span> <span class="s">{</span> | |
| 420 407 <span class="i">$Other</span><span class="i">->Reverse</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 421 408 <span class="s">}</span> | |
| 422 409 <span class="k">return</span> <span class="i">$This</span><span class="i">->_Join</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span><span class="sc">;</span> | |
| 423 410 <span class="s">}</span> | |
| 424 411 | |
| 425 412 <span class="c"># Join the existing path with a new path specifed using a path object of a list of</span> | |
| 426 413 <span class="c"># verticies.</span> | |
| 427 414 <span class="c">#</span> | |
| 428 415 <span class="c"># Notes:</span> | |
| 429 416 <span class="c"># . Paths must have a common terminal vertex.</span> | |
| 430 417 <span class="c"># . Based on the common terminal vertex found, new path vertices are added to the</span> | |
| 431 418 <span class="c"># current path in one of the four ways:</span> | |
| 432 419 <span class="c"># . New path at end of current path with same vertices order : EndVertex = NewStartVertex</span> | |
| 433 420 <span class="c"># . New path at end of current path with reversed vertices order: EndVertex = NewEndVertex</span> | |
| 434 421 <span class="c"># . New path at front of current path with same vertices order: StartVertex = NewEndVertex</span> | |
| 435 422 <span class="c"># . New path at front of current path with reversed vertices order: StartVertex = NewStartVertex</span> | |
| 436 423 <span class="c">#</span> | |
| 437 <a name="_Join-"></a> 424 <span class="k">sub </span><span class="m">_Join</span> <span class="s">{</span> | |
| 438 425 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">@Values</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 439 426 | |
| 440 427 <span class="k">if</span> <span class="s">(</span>!<span class="i">@Values</span><span class="s">)</span> <span class="s">{</span> | |
| 441 428 <span class="k">return</span><span class="sc">;</span> | |
| 442 429 <span class="s">}</span> | |
| 443 430 | |
| 444 431 <span class="c"># Get a list of new vertex IDs..</span> | |
| 445 432 <span class="k">my</span><span class="s">(</span><span class="i">$NewPath</span><span class="cm">,</span> <span class="i">$FirstValue</span><span class="cm">,</span> <span class="i">$TypeOfFirstValue</span><span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="s">)</span><span class="sc">;</span> | |
| 446 433 | |
| 447 434 <span class="i">$NewPath</span> = <span class="i">$This</span><span class="i">->Copy</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 448 435 | |
| 449 436 <span class="i">@NewVertexIDs</span> = <span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 450 437 <span class="i">$FirstValue</span> = <span class="i">$Values</span>[<span class="n">0</span>]<span class="sc">;</span> | |
| 451 438 <span class="i">$TypeOfFirstValue</span> = <span class="k">ref</span> <span class="i">$FirstValue</span><span class="sc">;</span> | |
| 452 439 <span class="k">if</span> <span class="s">(</span><span class="i">$TypeOfFirstValue</span> =~ <span class="q">/^(SCALAR|HASH|CODE|REF|GLOB)/</span><span class="s">)</span> <span class="s">{</span> | |
| 453 440 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->JoinPath: Trying to add vertices to path object with a reference to unsupported value format..."</span><span class="sc">;</span> | |
| 454 441 <span class="s">}</span> | |
| 455 442 | |
| 456 443 <span class="k">if</span> <span class="s">(</span><span class="i">_IsPath</span><span class="s">(</span><span class="i">$FirstValue</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 457 444 <span class="c"># It's another path object...</span> | |
| 458 445 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$FirstValue</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 459 446 <span class="s">}</span> | |
| 460 447 <span class="k">elsif</span> <span class="s">(</span><span class="i">$TypeOfFirstValue</span> =~ <span class="q">/^ARRAY/</span><span class="s">)</span> <span class="s">{</span> | |
| 461 448 <span class="c"># It's array reference...</span> | |
| 462 449 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$FirstValue</span>}<span class="sc">;</span> | |
| 463 450 <span class="s">}</span> | |
| 464 451 <span class="k">else</span> <span class="s">{</span> | |
| 465 452 <span class="c"># It's a list of values...</span> | |
| 466 453 <span class="k">push</span> <span class="i">@NewVertexIDs</span><span class="cm">,</span> <span class="i">@Values</span><span class="sc">;</span> | |
| 467 454 <span class="s">}</span> | |
| 468 455 <span class="k">my</span><span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="cm">,</span> <span class="i">$NewStartVertex</span><span class="cm">,</span> <span class="i">$NewEndVertex</span><span class="s">)</span><span class="sc">;</span> | |
| 469 456 | |
| 470 457 <span class="s">(</span><span class="i">$StartVertex</span><span class="cm">,</span> <span class="i">$EndVertex</span><span class="s">)</span> = <span class="i">$NewPath</span><span class="i">->GetTerminalVertices</span><span class="s">(</span><span class="s">)</span><span class="sc">;</span> | |
| 471 458 <span class="s">(</span><span class="i">$NewStartVertex</span><span class="cm">,</span> <span class="i">$NewEndVertex</span><span class="s">)</span> = <span class="s">(</span><span class="i">$NewVertexIDs</span>[<span class="n">0</span>]<span class="cm">,</span> <span class="i">$NewVertexIDs</span>[<span class="i">$#NewVertexIDs</span>]<span class="s">)</span><span class="sc">;</span> | |
| 472 459 | |
| 473 460 <span class="k">if</span> <span class="s">(</span>!<span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewStartVertex</span> || <span class="i">$EndVertex</span> == <span class="i">$NewEndVertex</span> || <span class="i">$StartVertex</span> == <span class="i">$NewEndVertex</span> || <span class="i">$StartVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 474 461 <span class="w">carp</span> <span class="q">"Warning: ${ClassName}->JoinPath: Paths can't be joined: No common terminal vertex found..."</span><span class="sc">;</span> | |
| 475 462 <span class="k">return</span> <span class="k">undef</span><span class="sc">;</span> | |
| 476 463 <span class="s">}</span> | |
| 477 464 | |
| 478 465 <span class="k">if</span> <span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span> <span class="s">{</span> | |
| 479 466 <span class="c"># Take out EndVertex and add new path at the end...</span> | |
| 480 467 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 481 468 <span class="k">push</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 482 469 <span class="s">}</span> | |
| 483 470 <span class="k">elsif</span> <span class="s">(</span><span class="i">$EndVertex</span> == <span class="i">$NewEndVertex</span><span class="s">)</span> <span class="s">{</span> | |
| 484 471 <span class="c"># Take out EndVertex and add new path at the end with reversed vertex order...</span> | |
| 485 472 <span class="k">pop</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="sc">;</span> | |
| 486 473 <span class="k">push</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 487 474 <span class="s">}</span> | |
| 488 475 <span class="k">elsif</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$NewEndVertex</span><span class="s">)</span> <span class="s">{</span> | |
| 489 476 <span class="c"># Take out NewEndVertex and add new path at the front...</span> | |
| 490 477 <span class="k">pop</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 491 478 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 492 479 <span class="s">}</span> | |
| 493 480 <span class="k">elsif</span> <span class="s">(</span><span class="i">$StartVertex</span> == <span class="i">$NewStartVertex</span><span class="s">)</span> <span class="s">{</span> | |
| 494 481 <span class="c"># Take out NewStartVertex and add new path at the front...</span> | |
| 495 482 <span class="k">shift</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 496 483 <span class="k">unshift</span> <span class="i">@</span>{<span class="i">$NewPath</span>->{<span class="w">Vertices</span>}}<span class="cm">,</span> <span class="k">reverse</span> <span class="i">@NewVertexIDs</span><span class="sc">;</span> | |
| 497 484 <span class="s">}</span> | |
| 498 485 | |
| 499 486 <span class="k">return</span> <span class="i">$NewPath</span><span class="cm">,</span> | |
| 500 487 <span class="s">}</span> | |
| 501 488 | |
| 502 489 <span class="c"># Compare two paths...</span> | |
| 503 490 <span class="c">#</span> | |
| 504 <a name="_PathEqualOperator-"></a> 491 <span class="k">sub </span><span class="m">_PathEqualOperator</span> <span class="s">{</span> | |
| 505 492 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="cm">,</span> <span class="i">$Other</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 506 493 | |
| 507 494 <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">$This</span><span class="s">)</span> && <span class="i">_IsPath</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> && <span class="k">defined</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span> && <span class="i">_IsPath</span><span class="s">(</span><span class="i">$Other</span><span class="s">)</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 508 495 <span class="w">croak</span> <span class="q">"Error: ${ClassName}->_PathEqualOperator: Path equal comparison failed: Both object must be paths..."</span><span class="sc">;</span> | |
| 509 496 <span class="s">}</span> | |
| 510 497 | |
| 511 498 <span class="k">if</span> <span class="s">(</span><span class="i">$This</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span> != <span class="i">$Other</span><span class="i">->GetLength</span><span class="s">(</span><span class="s">)</span><span class="s">)</span> <span class="s">{</span> | |
| 512 499 <span class="k">return</span> <span class="n">0</span><span class="sc">;</span> | |
| 513 500 <span class="s">}</span> | |
| 514 501 <span class="k">my</span><span class="s">(</span><span class="i">$ThisID</span><span class="cm">,</span> <span class="i">$OtherID</span><span class="cm">,</span> <span class="i">$ReverseOtherID</span><span class="s">)</span><span class="sc">;</span> | |
| 515 502 | |
| 516 503 <span class="i">$ThisID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span> | |
| 517 504 <span class="i">$OtherID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$Other</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span> | |
| 518 505 <span class="i">$ReverseOtherID</span> = <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="k">reverse</span><span class="s">(</span><span class="i">@</span>{<span class="i">$Other</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="s">)</span><span class="sc">;</span> | |
| 519 506 | |
| 520 507 <span class="k">return</span> <span class="s">(</span><span class="i">$ThisID</span> =~ <span class="q">/^($OtherID|$ReverseOtherID)$/</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span> | |
| 521 508 <span class="s">}</span> | |
| 522 509 | |
| 523 510 <span class="c"># Return a string containing vertices in the path...</span> | |
| 524 <a name="StringifyPath-"></a> 511 <span class="k">sub </span><span class="m">StringifyPath</span> <span class="s">{</span> | |
| 525 512 <span class="k">my</span><span class="s">(</span><span class="i">$This</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 526 513 <span class="k">my</span><span class="s">(</span><span class="i">$PathString</span><span class="s">)</span><span class="sc">;</span> | |
| 527 514 | |
| 528 515 <span class="i">$PathString</span> = <span class="q">"Path: "</span> . <span class="k">join</span><span class="s">(</span><span class="q">'-'</span><span class="cm">,</span> <span class="i">@</span>{<span class="i">$This</span>->{<span class="w">Vertices</span>}}<span class="s">)</span><span class="sc">;</span> | |
| 529 516 | |
| 530 517 <span class="k">return</span> <span class="i">$PathString</span><span class="sc">;</span> | |
| 531 518 <span class="s">}</span> | |
| 532 519 | |
| 533 520 <span class="c"># Is it a path object?</span> | |
| 534 <a name="_IsPath-"></a> 521 <span class="k">sub </span><span class="m">_IsPath</span> <span class="s">{</span> | |
| 535 522 <span class="k">my</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> = <span class="i">@_</span><span class="sc">;</span> | |
| 536 523 | |
| 537 524 <span class="k">return</span> <span class="s">(</span><span class="i">Scalar::Util::blessed</span><span class="s">(</span><span class="i">$Object</span><span class="s">)</span> && <span class="i">$Object</span><span class="i">->isa</span><span class="s">(</span><span class="i">$ClassName</span><span class="s">)</span><span class="s">)</span> ? <span class="n">1</span> <span class="co">:</span> <span class="n">0</span><span class="sc">;</span> | |
| 538 525 <span class="s">}</span> | |
| 539 526 | |
| 540 <a name="EOF-"></a></pre> | |
| 541 <p> </p> | |
| 542 <br /> | |
| 543 <center> | |
| 544 <img src="../../../images/h2o2.png"> | |
| 545 </center> | |
| 546 </body> | |
| 547 </html> |