1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>User groups</title> 5<link rel="stylesheet" href="../../../../../../doc/src/boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../../index.html" title="Chapter 1. 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User group <code class="computeroutput"><span class="identifier">admin_users</span></code> 37 has access to administrative data like health insurance and financial data. 38 </p> 39<p> 40 The membership for each user in one of the user groups has a time interval 41 of validity. The group membership begins and ends. 42 </p> 43<div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; "> 44<li class="listitem"> 45 Using a union operation <code class="computeroutput"><span class="special">+</span></code> 46 we can have an overview over the unified user groups and the membership 47 dates of employees. 48 </li> 49<li class="listitem"> 50 Computing an intersection <code class="computeroutput"><span class="special">&</span></code> 51 shows who is member of both med_users and admin_users at what times. 52 </li> 53</ul></div> 54<p> 55</p> 56<pre class="programlisting"><span class="comment">// The next line includes <boost/gregorian/date.hpp></span> 57<span class="comment">// and a few lines of adapter code.</span> 58<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">gregorian</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 59<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span> 60<span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">icl</span><span class="special">/</span><span class="identifier">interval_map</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span> 61 62<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span> 63<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">gregorian</span><span class="special">;</span> 64<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">boost</span><span class="special">::</span><span class="identifier">icl</span><span class="special">;</span> 65 66<span class="comment">// Type icl::set<string> collects the names a user group's members. Therefore</span> 67<span class="comment">// it needs to implement operator += that performs a set union on overlap of </span> 68<span class="comment">// intervals.</span> 69<span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">set</span><span class="special"><</span><span class="identifier">string</span><span class="special">></span> <span class="identifier">MemberSetT</span><span class="special">;</span> 70 71<span class="comment">// boost::gregorian::date is the domain type the interval map. </span> 72<span class="comment">// It's key values are therefore time intervals: discrete_interval<date>. The content</span> 73<span class="comment">// is the set of names: MemberSetT.</span> 74<span class="keyword">typedef</span> <span class="identifier">interval_map</span><span class="special"><</span><span class="identifier">date</span><span class="special">,</span> <span class="identifier">MemberSetT</span><span class="special">></span> <span class="identifier">MembershipT</span><span class="special">;</span> 75 76<span class="comment">// Collect user groups for medical and administrative staff and perform</span> 77<span class="comment">// union and intersection operations on the collected membership schedules.</span> 78<span class="keyword">void</span> <span class="identifier">user_groups</span><span class="special">()</span> 79<span class="special">{</span> 80 <span class="identifier">MemberSetT</span> <span class="identifier">mary_harry</span><span class="special">;</span> 81 <span class="identifier">mary_harry</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Mary"</span><span class="special">);</span> 82 <span class="identifier">mary_harry</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Harry"</span><span class="special">);</span> 83 84 <span class="identifier">MemberSetT</span> <span class="identifier">diana_susan</span><span class="special">;</span> 85 <span class="identifier">diana_susan</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Diana"</span><span class="special">);</span> 86 <span class="identifier">diana_susan</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Susan"</span><span class="special">);</span> 87 88 <span class="identifier">MemberSetT</span> <span class="identifier">chief_physician</span><span class="special">;</span> 89 <span class="identifier">chief_physician</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Dr.Jekyll"</span><span class="special">);</span> 90 91 <span class="identifier">MemberSetT</span> <span class="identifier">director_of_admin</span><span class="special">;</span> 92 <span class="identifier">director_of_admin</span><span class="special">.</span><span class="identifier">insert</span><span class="special">(</span><span class="string">"Mr.Hyde"</span><span class="special">);</span> 93 94 <span class="comment">//----- Collecting members of user group: med_users -------------------</span> 95 <span class="identifier">MembershipT</span> <span class="identifier">med_users</span><span class="special">;</span> 96 97 <span class="identifier">med_users</span><span class="special">.</span><span class="identifier">add</span><span class="special">(</span> <span class="comment">// add and element</span> 98 <span class="identifier">make_pair</span><span class="special">(</span> 99 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 100 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-01-01"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-12-31"</span><span class="special">)),</span> <span class="identifier">mary_harry</span><span class="special">));</span> 101 102 <span class="identifier">med_users</span> <span class="special">+=</span> <span class="comment">// element addition can also be done via operator +=</span> 103 <span class="identifier">make_pair</span><span class="special">(</span> 104 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 105 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-01-15"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-12-31"</span><span class="special">)),</span> 106 <span class="identifier">chief_physician</span><span class="special">);</span> 107 108 <span class="identifier">med_users</span> <span class="special">+=</span> 109 <span class="identifier">make_pair</span><span class="special">(</span> 110 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 111 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-02-01"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-10-15"</span><span class="special">)),</span> 112 <span class="identifier">director_of_admin</span><span class="special">);</span> 113 114 <span class="comment">//----- Collecting members of user group: admin_users ------------------</span> 115 <span class="identifier">MembershipT</span> <span class="identifier">admin_users</span><span class="special">;</span> 116 117 <span class="identifier">admin_users</span> <span class="special">+=</span> <span class="comment">// element addition can also be done via operator +=</span> 118 <span class="identifier">make_pair</span><span class="special">(</span> 119 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 120 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-03-20"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-09-30"</span><span class="special">)),</span> <span class="identifier">diana_susan</span><span class="special">);</span> 121 122 <span class="identifier">admin_users</span> <span class="special">+=</span> 123 <span class="identifier">make_pair</span><span class="special">(</span> 124 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 125 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-01-15"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-12-31"</span><span class="special">)),</span> 126 <span class="identifier">chief_physician</span><span class="special">);</span> 127 128 <span class="identifier">admin_users</span> <span class="special">+=</span> 129 <span class="identifier">make_pair</span><span class="special">(</span> 130 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">>::</span><span class="identifier">closed</span><span class="special">(</span> 131 <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-02-01"</span><span class="special">),</span> <span class="identifier">from_string</span><span class="special">(</span><span class="string">"2008-10-15"</span><span class="special">)),</span> 132 <span class="identifier">director_of_admin</span><span class="special">);</span> 133 134 <span class="identifier">MembershipT</span> <span class="identifier">all_users</span> <span class="special">=</span> <span class="identifier">med_users</span> <span class="special">+</span> <span class="identifier">admin_users</span><span class="special">;</span> 135 136 <span class="identifier">MembershipT</span> <span class="identifier">super_users</span> <span class="special">=</span> <span class="identifier">med_users</span> <span class="special">&</span> <span class="identifier">admin_users</span><span class="special">;</span> 137 138 <span class="identifier">MembershipT</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">med_</span> <span class="special">=</span> <span class="identifier">med_users</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> 139 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"----- Membership of medical staff -----------------------------------\n"</span><span class="special">;</span> 140 <span class="keyword">while</span><span class="special">(</span><span class="identifier">med_</span> <span class="special">!=</span> <span class="identifier">med_users</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span> 141 <span class="special">{</span> 142 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">></span> <span class="identifier">when</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">med_</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span> 143 <span class="comment">// Who is member of group med_users within the time interval 'when' ?</span> 144 <span class="identifier">MemberSetT</span> <span class="identifier">who</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">med_</span><span class="special">++).</span><span class="identifier">second</span><span class="special">;</span> 145 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"["</span> <span class="special"><<</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" - "</span> <span class="special"><<</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">"]"</span> 146 <span class="special"><<</span> <span class="string">": "</span> <span class="special"><<</span> <span class="identifier">who</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> 147 <span class="special">}</span> 148 149 <span class="identifier">MembershipT</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">admin_</span> <span class="special">=</span> <span class="identifier">admin_users</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> 150 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"----- Membership of admin staff -------------------------------------\n"</span><span class="special">;</span> 151 <span class="keyword">while</span><span class="special">(</span><span class="identifier">admin_</span> <span class="special">!=</span> <span class="identifier">admin_users</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span> 152 <span class="special">{</span> 153 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">></span> <span class="identifier">when</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">admin_</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span> 154 <span class="comment">// Who is member of group admin_users within the time interval 'when' ?</span> 155 <span class="identifier">MemberSetT</span> <span class="identifier">who</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">admin_</span><span class="special">++).</span><span class="identifier">second</span><span class="special">;</span> 156 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"["</span> <span class="special"><<</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" - "</span> <span class="special"><<</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">"]"</span> 157 <span class="special"><<</span> <span class="string">": "</span> <span class="special"><<</span> <span class="identifier">who</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> 158 <span class="special">}</span> 159 160 <span class="identifier">MembershipT</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">all_</span> <span class="special">=</span> <span class="identifier">all_users</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> 161 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"----- Membership of all users (med + admin) -------------------------\n"</span><span class="special">;</span> 162 <span class="keyword">while</span><span class="special">(</span><span class="identifier">all_</span> <span class="special">!=</span> <span class="identifier">all_users</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span> 163 <span class="special">{</span> 164 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">></span> <span class="identifier">when</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">all_</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span> 165 <span class="comment">// Who is member of group med_users OR admin_users ?</span> 166 <span class="identifier">MemberSetT</span> <span class="identifier">who</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">all_</span><span class="special">++).</span><span class="identifier">second</span><span class="special">;</span> 167 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"["</span> <span class="special"><<</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" - "</span> <span class="special"><<</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">"]"</span> 168 <span class="special"><<</span> <span class="string">": "</span> <span class="special"><<</span> <span class="identifier">who</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> 169 <span class="special">}</span> 170 171 <span class="identifier">MembershipT</span><span class="special">::</span><span class="identifier">iterator</span> <span class="identifier">super_</span> <span class="special">=</span> <span class="identifier">super_users</span><span class="special">.</span><span class="identifier">begin</span><span class="special">();</span> 172 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"----- Membership of super users: intersection(med,admin) ------------\n"</span><span class="special">;</span> 173 <span class="keyword">while</span><span class="special">(</span><span class="identifier">super_</span> <span class="special">!=</span> <span class="identifier">super_users</span><span class="special">.</span><span class="identifier">end</span><span class="special">())</span> 174 <span class="special">{</span> 175 <span class="identifier">discrete_interval</span><span class="special"><</span><span class="identifier">date</span><span class="special">></span> <span class="identifier">when</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">super_</span><span class="special">).</span><span class="identifier">first</span><span class="special">;</span> 176 <span class="comment">// Who is member of group med_users AND admin_users ?</span> 177 <span class="identifier">MemberSetT</span> <span class="identifier">who</span> <span class="special">=</span> <span class="special">(*</span><span class="identifier">super_</span><span class="special">++).</span><span class="identifier">second</span><span class="special">;</span> 178 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"["</span> <span class="special"><<</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">" - "</span> <span class="special"><<</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special"><<</span> <span class="string">"]"</span> 179 <span class="special"><<</span> <span class="string">": "</span> <span class="special"><<</span> <span class="identifier">who</span> <span class="special"><<</span> <span class="identifier">endl</span><span class="special">;</span> 180 <span class="special">}</span> 181 182<span class="special">}</span> 183 184 185<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span> 186<span class="special">{</span> 187 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">">>Interval Container Library: Sample user_groups.cpp <<\n"</span><span class="special">;</span> 188 <span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"-------------------------------------------------------\n"</span><span class="special">;</span> 189 <span class="identifier">user_groups</span><span class="special">();</span> 190 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span> 191<span class="special">}</span> 192 193<span class="comment">// Program output:</span> 194<span class="comment">/*----------------------------------------------------------------------------- 195>>Interval Container Library: Sample user_groups.cpp << 196------------------------------------------------------- 197----- Membership of medical staff ----------------------------------- 198[2008-Jan-01 - 2008-Jan-14]: Harry Mary 199[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll Harry Mary 200[2008-Feb-01 - 2008-Oct-15]: Dr.Jekyll Harry Mary Mr.Hyde 201[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll Harry Mary 202----- Membership of admin staff ------------------------------------- 203[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll 204[2008-Feb-01 - 2008-Mar-19]: Dr.Jekyll Mr.Hyde 205[2008-Mar-20 - 2008-Sep-30]: Diana Dr.Jekyll Mr.Hyde Susan 206[2008-Oct-01 - 2008-Oct-15]: Dr.Jekyll Mr.Hyde 207[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll 208----- Membership of all users (med + admin) ------------------------- 209[2008-Jan-01 - 2008-Jan-14]: Harry Mary 210[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll Harry Mary 211[2008-Feb-01 - 2008-Mar-19]: Dr.Jekyll Harry Mary Mr.Hyde 212[2008-Mar-20 - 2008-Sep-30]: Diana Dr.Jekyll Harry Mary Mr.Hyde Susan 213[2008-Oct-01 - 2008-Oct-15]: Dr.Jekyll Harry Mary Mr.Hyde 214[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll Harry Mary 215----- Membership of super users: intersection(med,admin) ------------ 216[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll 217[2008-Feb-01 - 2008-Oct-15]: Dr.Jekyll Mr.Hyde 218[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll 219-----------------------------------------------------------------------------*/</span> 220</pre> 221<p> 222 </p> 223</div> 224<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 225<td align="left"></td> 226<td align="right"><div class="copyright-footer">Copyright © 2007-2010 Joachim 227 Faulhaber<br>Copyright © 1999-2006 Cortex Software 228 GmbH<p> 229 Distributed under the Boost Software License, Version 1.0. (See accompanying 230 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) 231 </p> 232</div></td> 233</tr></table> 234<hr> 235<div class="spirit-nav"> 236<a accesskey="p" href="man_power.html"><img src="../../../../../../doc/src/images/prev.png" alt="Prev"></a><a accesskey="u" href="../examples.html"><img src="../../../../../../doc/src/images/up.png" alt="Up"></a><a accesskey="h" href="../../index.html"><img src="../../../../../../doc/src/images/home.png" alt="Home"></a><a accesskey="n" href="std_copy.html"><img src="../../../../../../doc/src/images/next.png" alt="Next"></a> 237</div> 238</body> 239</html> 240
