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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>DMTL: db_reader.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.4.7 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> </ul></div><h1>db_reader.h</h1><a href="db__reader_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span><a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2005 M.J. Zaki <zaki@cs.rpi.edu> Rensselaer Polytechnic Institute</span><a name="l00003"></a>00003 <span class="comment"> * Written by parimi@cs.rpi.edu</span><a name="l00004"></a>00004 <span class="comment"> * Updated by chaojv@cs.rpi.edu, alhasan@cs.rpi.edu, salems@cs.rpi.edu</span><a name="l00005"></a>00005 <span class="comment"> *</span><a name="l00006"></a>00006 <span class="comment"> * This program is free software; you can redistribute it and/or</span><a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU General Public License</span><a name="l00008"></a>00008 <span class="comment"> * as published by the Free Software Foundation; either version 2</span><a name="l00009"></a>00009 <span class="comment"> * of the License, or (at your option) any later version.</span><a name="l00010"></a>00010 <span class="comment"> *</span><a name="l00011"></a>00011 <span class="comment"> * This program is distributed in the hope that it will be useful,</span><a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span><a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span><a name="l00014"></a>00014 <span class="comment"> * GNU General Public License for more details.</span><a name="l00015"></a>00015 <span class="comment"> *</span><a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU General Public License along</span><a name="l00017"></a>00017 <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span><a name="l00018"></a>00018 <span class="comment"> * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.</span><a name="l00019"></a>00019 <span class="comment"> */</span><a name="l00021"></a>00021 <span class="preprocessor">#ifndef _DB_READER_H</span><a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define _DB_READER_H</span><a name="l00023"></a>00023 <span class="preprocessor"></span><a name="l00024"></a>00024 <span class="preprocessor">#include <sstream></span><a name="l00025"></a>00025 <span class="preprocessor">#include <fstream></span><a name="l00026"></a>00026 <span class="preprocessor">#include <vector></span><a name="l00027"></a>00027 <span class="preprocessor">#include <map></span><a name="l00028"></a>00028 <a name="l00029"></a>00029 <span class="comment">// using namespace std;</span><a name="l00030"></a>00030 <a name="l00031"></a>00031 <span class="comment">// adding all files manually for now, TODO: improve this include system</span><a name="l00032"></a>00032 <a name="l00033"></a>00033 <span class="preprocessor">#include "helper_funs.h"</span><a name="l00034"></a>00034 <span class="preprocessor">#include "generic_classes.h"</span><a name="l00035"></a>00035 <span class="preprocessor">#include "<a class="code" href="pat__fam_8h.html">pat_fam.h</a>"</span> <span class="comment">// added later to make .cpp files</span><a name="l00041"></a>00041 <span class="comment"></span><span class="keyword">template</span><<span class="keyword">typename</span> PATTERN, <span class="keyword">typename</span> TOKENIZER, <span class="keyword">template</span> <<span class="keyword">typename</span>> <span class="keyword">class </span>ALLOC ><a name="l00042"></a><a class="code" href="classdb__reader.html">00042</a> <span class="keyword">class </span><a class="code" href="classdb__reader.html">db_reader</a><a name="l00043"></a>00043 {<a name="l00044"></a>00044 <span class="keyword">public</span>:<a name="l00045"></a>00045 <a name="l00046"></a>00046 <span class="keyword">typedef</span> <a class="code" href="classvat.html">vat<typename PATTERN::PAT_PROPS, typename PATTERN::MINE_PROPS, ALLOC, std::vector></a> <a class="code" href="classvat.html">VAT</a>; <a name="l00047"></a><a class="code" href="classdb__reader.html#393fc1277eddb4f5eed3e6def882bba1">00047</a> <span class="keyword">typedef</span> <a class="code" href="classtokenizer.html">tokenizer<PATTERN, TOKENIZER, ALLOC ></a> <a class="code" href="classtokenizer.html">TKNZ</a>; <a name="l00048"></a>00048 <a name="l00053"></a><a class="code" href="classdb__reader.html#c5876ce13b101064cf6490330d14b680">00053</a> <a class="code" href="classdb__reader.html#c5876ce13b101064cf6490330d14b680">db_reader</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* infile_name): _in_db(infile_name) {}<a name="l00054"></a>00054 <a name="l00060"></a><a class="code" href="classdb__reader.html#c427ac90e7291c45c9062c1342b489b7">00060</a> <a class="code" href="classdb__reader.html#c5876ce13b101064cf6490330d14b680">db_reader</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* infile_name, <span class="keywordtype">int</span> mem_size): _in_db(infile_name) {filename=strdup(infile_name);_max_mem=mem_size;}<a name="l00061"></a>00061 <a name="l00065"></a><a class="code" href="classdb__reader.html#201907ca71dcdfee1afcb5a0f4276459">00065</a> <a class="code" href="classdb__reader.html#201907ca71dcdfee1afcb5a0f4276459">~db_reader</a>()<a name="l00066"></a>00066 { <a class="code" href="classdb__reader.html#fbd8800d3623a8f60e1840e5ea7c4437">close</a>();}<a name="l00067"></a>00067 <a name="l00073"></a><a class="code" href="classdb__reader.html#5a1817812743ce54e2bd1d3792205be2">00073</a> <span class="keywordtype">void</span> <a class="code" href="classdb__reader.html#5a1817812743ce54e2bd1d3792205be2">open</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* infile_name) { <a name="l00074"></a>00074 <span class="keywordflow">if</span>(<a class="code" href="classdb__reader.html#f90258967407ef7cfb7b049f73492bf1">is_open</a>())<a name="l00075"></a>00075 _in_db.close();<a name="l00076"></a>00076 _in_db.open(infile_name);<a name="l00077"></a>00077 }<a name="l00078"></a>00078 <a name="l00082"></a><a class="code" href="classdb__reader.html#fbd8800d3623a8f60e1840e5ea7c4437">00082</a> <span class="keywordtype">void</span> <a class="code" href="classdb__reader.html#fbd8800d3623a8f60e1840e5ea7c4437">close</a>() { <a name="l00083"></a>00083 _in_db.close();<a name="l00084"></a>00084 }<a name="l00085"></a>00085 <a name="l00089"></a><a class="code" href="classdb__reader.html#f90258967407ef7cfb7b049f73492bf1">00089</a> <span class="keywordtype">bool</span> <a class="code" href="classdb__reader.html#f90258967407ef7cfb7b049f73492bf1">is_open</a>() { <a name="l00090"></a>00090 <span class="keywordflow">return</span> _in_db.is_open();<a name="l00091"></a>00091 }<a name="l00092"></a>00092 <a name="l00099"></a>00099 <span class="keyword">template</span><<span class="keyword">class</span> SM_T><a name="l00100"></a><a class="code" href="classdb__reader.html#dd4e70279ee1916eddf117fbcfb97c24">00100</a> <span class="keywordtype">void</span> <a class="code" href="classdb__reader.html#dd4e70279ee1916eddf117fbcfb97c24">get_length_one</a>(<a class="code" href="classpat__fam.html">pat_fam<PATTERN></a>& freq_pats, <a class="code" href="classstorage__manager.html">storage_manager<PATTERN, VAT, ALLOC, SM_T></a>& vat_hmap, <span class="keyword">const</span> <span class="keywordtype">int</span>& minsup) {<a name="l00101"></a>00101 <a name="l00102"></a>00102 <span class="keywordtype">int</span> tid;<a name="l00103"></a>00103 <a class="code" href="classvat.html">VAT</a>* ivat;<a name="l00104"></a>00104 <span class="keyword">typename</span> <a class="code" href="classpat__fam.html">pat_fam<PATTERN>::IT</a> pf_it;<a name="l00105"></a>00105 <a name="l00106"></a>00106 <span class="keywordflow">if</span>(!<a class="code" href="classdb__reader.html#f90258967407ef7cfb7b049f73492bf1">is_open</a>()) {<a name="l00107"></a>00107 <span class="comment">// stream not open</span><a name="l00108"></a>00108 std::cerr<<<span class="stringliteral">"db_reader: file stream not open in get_length_one()"</span><<std::endl;<a name="l00109"></a>00109 <span class="keywordflow">return</span>;<a name="l00110"></a>00110 }<a name="l00111"></a>00111 <a name="l00112"></a>00112 tid=tknz.parse_next_trans(_in_db, freq_pats, vat_hmap);<a name="l00113"></a>00113 <span class="keywordflow">while</span>(tid!=-1) {<a name="l00114"></a>00114 tid=tknz.parse_next_trans(_in_db, freq_pats, vat_hmap);<a name="l00115"></a>00115 }<a name="l00116"></a>00116 <a name="l00117"></a>00117 <span class="comment">// fill in support of level-1, discarding infrequent ones</span><a name="l00118"></a>00118 <span class="keywordflow">for</span>(pf_it=freq_pats.begin(); pf_it!=freq_pats.end();++pf_it) {<a name="l00119"></a>00119 <span class="keywordflow">if</span>(!(ivat=vat_hmap.get_vat(*pf_it))) {<a name="l00120"></a>00120 std::cerr<<<span class="stringliteral">"db_reader.get_length_one: VAT not found for "</span><<*pf_it<<std::endl;<a name="l00121"></a>00121 <span class="keywordflow">return</span>;<a name="l00122"></a>00122 }<a name="l00123"></a>00123 <a name="l00124"></a>00124 <span class="comment">//cout << "LEVEL 1 " << *ivat << endl;</span><a name="l00125"></a>00125 <a name="l00126"></a>00126 <span class="keywordflow">if</span>((ivat->size())>=minsup)<a name="l00127"></a>00127 (*pf_it)->set_sup(make_pair(ivat->size(), 0));<a name="l00128"></a>00128 <span class="keywordflow">else</span> {<a name="l00129"></a>00129 <span class="comment">// Delete the pattern and the vat.</span><a name="l00130"></a>00130 vat_hmap.delete_vat(*pf_it);<a name="l00131"></a>00131 <span class="keyword">delete</span> (*pf_it);<a name="l00132"></a>00132 <a name="l00133"></a>00133 freq_pats.erase(pf_it); <a name="l00134"></a>00134 pf_it--;<a name="l00135"></a>00135 }<a name="l00136"></a>00136 } <span class="comment">//end for</span><a name="l00137"></a>00137 <a name="l00138"></a>00138 <span class="comment">// sort level-1 patterns</span><a name="l00139"></a>00139 <span class="comment">//typename pat_fam<PATTERN>::IT b=freq_pats.begin(), e=freq_pats.end();</span><a name="l00140"></a>00140 <span class="comment">//sort(b, e, less_than<PATTERN>());</span><a name="l00141"></a>00141 <a name="l00142"></a>00142 } <span class="comment">//end get_length_one()</span><a name="l00143"></a>00143 <a name="l00144"></a>00144 <span class="keyword">private</span>:<a name="l00145"></a>00145 std::ifstream _in_db;<a name="l00146"></a>00146 <span class="keywordtype">char</span>* filename; <span class="comment">// Holds the file name of the dataset</span><a name="l00147"></a>00147 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> _max_mem; <a name="l00148"></a>00148 <a class="code" href="classdb__reader.html#393fc1277eddb4f5eed3e6def882bba1">TKNZ</a> tknz; <span class="comment">// An object of Tokenizer class</span><a name="l00149"></a>00149 }; <span class="comment">//end class db_reader<itemset></span><a name="l00150"></a>00150 <a name="l00151"></a>00151 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="align: right;"><small>Generated on Wed Jul 26 14:01:08 2006 for DMTL by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.4.7 </small></address></body></html>⌨️ 快捷键说明
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