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25<div class="section boost_icl_examples_user_groups" lang="en">
26<div class="titlepage"><div><div><h3 class="title">
27<a name="boost_icl.examples.user_groups"></a><a class="link" href="user_groups.html" title="User groups">User groups</a>
28</h3></div></div></div>
29<p>
30 Example <span class="bold"><strong>user groups</strong></span> shows the availability
31 of set operations on <code class="computeroutput"><a class="link" href="../../boost/icl/interval_map.html" title="Class template interval_map">interval_maps</a></code>.
32 </p>
33<p>
34 In the example there is a user group <code class="computeroutput"><span class="identifier">med_users</span></code>
35 of a hospital staff that has the authorisation to handle medical data of
36 patients. 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 type="disc">
44<li>
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>
50 Computing an intersection <code class="computeroutput"><span class="special">&amp;</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<p>
57
58</p>
59<pre class="programlisting"><span class="comment">// The next line includes &lt;boost/gregorian/date.hpp&gt;
60</span><span class="comment">// and a few lines of adapter code.
61</span><span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
62<span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">iostream</span><span class="special">&gt;</span>
63<span class="preprocessor">#include</span> <span class="special">&lt;</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">&gt;</span>
64
65<span class="keyword">using</span> <span class="keyword">namespace</span> <span class="identifier">std</span><span class="special">;</span>
66<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>
67<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>
68
69<span class="comment">// Type icl::set&lt;string&gt; collects the names a user group's members. Therefore
70</span><span class="comment">// it needs to implement operator += that performs a set union on overlap of
71</span><span class="comment">// intervals.
72</span><span class="keyword">typedef</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">set</span><span class="special">&lt;</span><span class="identifier">string</span><span class="special">&gt;</span> <span class="identifier">MemberSetT</span><span class="special">;</span>
73
74<span class="comment">// boost::gregorian::date is the domain type the interval map.
75</span><span class="comment">// It's key values are therefore time intervals: discrete_interval&lt;date&gt;. The content
76</span><span class="comment">// is the set of names: MemberSetT.
77</span><span class="keyword">typedef</span> <span class="identifier">interval_map</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">,</span> <span class="identifier">MemberSetT</span><span class="special">&gt;</span> <span class="identifier">MembershipT</span><span class="special">;</span>
78
79<span class="comment">// Collect user groups for medical and administrative staff and perform
80</span><span class="comment">// union and intersection operations on the collected membership schedules.
81</span><span class="keyword">void</span> <span class="identifier">user_groups</span><span class="special">()</span>
82<span class="special">{</span>
83 <span class="identifier">MemberSetT</span> <span class="identifier">mary_harry</span><span class="special">;</span>
84 <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>
85 <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>
86
87 <span class="identifier">MemberSetT</span> <span class="identifier">diana_susan</span><span class="special">;</span>
88 <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>
89 <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>
90
91 <span class="identifier">MemberSetT</span> <span class="identifier">chief_physician</span><span class="special">;</span>
92 <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>
93
94 <span class="identifier">MemberSetT</span> <span class="identifier">director_of_admin</span><span class="special">;</span>
95 <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>
96
97 <span class="comment">//----- Collecting members of user group: med_users -------------------
98</span> <span class="identifier">MembershipT</span> <span class="identifier">med_users</span><span class="special">;</span>
99
100 <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
101</span> <span class="identifier">make_pair</span><span class="special">(</span>
102 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
103 <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>
104
105 <span class="identifier">med_users</span> <span class="special">+=</span> <span class="comment">// element addition can also be done via operator +=
106</span> <span class="identifier">make_pair</span><span class="special">(</span>
107 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
108 <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>
109 <span class="identifier">chief_physician</span><span class="special">);</span>
110
111 <span class="identifier">med_users</span> <span class="special">+=</span>
112 <span class="identifier">make_pair</span><span class="special">(</span>
113 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
114 <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>
115 <span class="identifier">director_of_admin</span><span class="special">);</span>
116
117 <span class="comment">//----- Collecting members of user group: admin_users ------------------
118</span> <span class="identifier">MembershipT</span> <span class="identifier">admin_users</span><span class="special">;</span>
119
120 <span class="identifier">admin_users</span> <span class="special">+=</span> <span class="comment">// element addition can also be done via operator +=
121</span> <span class="identifier">make_pair</span><span class="special">(</span>
122 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
123 <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>
124
125 <span class="identifier">admin_users</span> <span class="special">+=</span>
126 <span class="identifier">make_pair</span><span class="special">(</span>
127 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
128 <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>
129 <span class="identifier">chief_physician</span><span class="special">);</span>
130
131 <span class="identifier">admin_users</span> <span class="special">+=</span>
132 <span class="identifier">make_pair</span><span class="special">(</span>
133 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;::</span><span class="identifier">closed</span><span class="special">(</span>
134 <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>
135 <span class="identifier">director_of_admin</span><span class="special">);</span>
136
137 <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>
138
139 <span class="identifier">MembershipT</span> <span class="identifier">super_users</span> <span class="special">=</span> <span class="identifier">med_users</span> <span class="special">&amp;</span> <span class="identifier">admin_users</span><span class="special">;</span>
140
141 <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>
142 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Membership of medical staff -----------------------------------\n"</span><span class="special">;</span>
143 <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>
144 <span class="special">{</span>
145 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;</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>
146 <span class="comment">// Who is member of group med_users within the time interval 'when' ?
147</span> <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>
148 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"["</span> <span class="special">&lt;&lt;</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">"]"</span>
149 <span class="special">&lt;&lt;</span> <span class="string">": "</span> <span class="special">&lt;&lt;</span> <span class="identifier">who</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
150 <span class="special">}</span>
151
152 <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>
153 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Membership of admin staff -------------------------------------\n"</span><span class="special">;</span>
154 <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>
155 <span class="special">{</span>
156 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;</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>
157 <span class="comment">// Who is member of group admin_users within the time interval 'when' ?
158</span> <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>
159 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"["</span> <span class="special">&lt;&lt;</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">"]"</span>
160 <span class="special">&lt;&lt;</span> <span class="string">": "</span> <span class="special">&lt;&lt;</span> <span class="identifier">who</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
161 <span class="special">}</span>
162
163 <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>
164 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Membership of all users (med + admin) -------------------------\n"</span><span class="special">;</span>
165 <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>
166 <span class="special">{</span>
167 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;</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>
168 <span class="comment">// Who is member of group med_users OR admin_users ?
169</span> <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>
170 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"["</span> <span class="special">&lt;&lt;</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">"]"</span>
171 <span class="special">&lt;&lt;</span> <span class="string">": "</span> <span class="special">&lt;&lt;</span> <span class="identifier">who</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
172 <span class="special">}</span>
173
174 <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>
175 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"----- Membership of super users: intersection(med,admin) ------------\n"</span><span class="special">;</span>
176 <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>
177 <span class="special">{</span>
178 <span class="identifier">discrete_interval</span><span class="special">&lt;</span><span class="identifier">date</span><span class="special">&gt;</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>
179 <span class="comment">// Who is member of group med_users AND admin_users ?
180</span> <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>
181 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"["</span> <span class="special">&lt;&lt;</span> <span class="identifier">first</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">" - "</span> <span class="special">&lt;&lt;</span> <span class="identifier">last</span><span class="special">(</span><span class="identifier">when</span><span class="special">)</span> <span class="special">&lt;&lt;</span> <span class="string">"]"</span>
182 <span class="special">&lt;&lt;</span> <span class="string">": "</span> <span class="special">&lt;&lt;</span> <span class="identifier">who</span> <span class="special">&lt;&lt;</span> <span class="identifier">endl</span><span class="special">;</span>
183 <span class="special">}</span>
184
185<span class="special">}</span>
186
187
188<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
189<span class="special">{</span>
190 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"&gt;&gt;Interval Container Library: Sample user_groups.cpp &lt;&lt;\n"</span><span class="special">;</span>
191 <span class="identifier">cout</span> <span class="special">&lt;&lt;</span> <span class="string">"-------------------------------------------------------\n"</span><span class="special">;</span>
192 <span class="identifier">user_groups</span><span class="special">();</span>
193 <span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
194<span class="special">}</span>
195
196<span class="comment">// Program output:
197</span><span class="comment">/*-----------------------------------------------------------------------------
198&gt;&gt;Interval Container Library: Sample user_groups.cpp &lt;&lt;
199-------------------------------------------------------
200----- Membership of medical staff -----------------------------------
201[2008-Jan-01 - 2008-Jan-14]: Harry Mary
202[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll Harry Mary
203[2008-Feb-01 - 2008-Oct-15]: Dr.Jekyll Harry Mary Mr.Hyde
204[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll Harry Mary
205----- Membership of admin staff -------------------------------------
206[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll
207[2008-Feb-01 - 2008-Mar-19]: Dr.Jekyll Mr.Hyde
208[2008-Mar-20 - 2008-Sep-30]: Diana Dr.Jekyll Mr.Hyde Susan
209[2008-Oct-01 - 2008-Oct-15]: Dr.Jekyll Mr.Hyde
210[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll
211----- Membership of all users (med + admin) -------------------------
212[2008-Jan-01 - 2008-Jan-14]: Harry Mary
213[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll Harry Mary
214[2008-Feb-01 - 2008-Mar-19]: Dr.Jekyll Harry Mary Mr.Hyde
215[2008-Mar-20 - 2008-Sep-30]: Diana Dr.Jekyll Harry Mary Mr.Hyde Susan
216[2008-Oct-01 - 2008-Oct-15]: Dr.Jekyll Harry Mary Mr.Hyde
217[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll Harry Mary
218----- Membership of super users: intersection(med,admin) ------------
219[2008-Jan-15 - 2008-Jan-31]: Dr.Jekyll
220[2008-Feb-01 - 2008-Oct-15]: Dr.Jekyll Mr.Hyde
221[2008-Oct-16 - 2008-Dec-31]: Dr.Jekyll
222-----------------------------------------------------------------------------*/</span>
223</pre>
224<p>
225 </p>
226<p>
227 </p>
228</div>
229<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
230<td align="left"></td>
231<td align="right"><div class="copyright-footer">Copyright &#169; 2007 -2010 Joachim Faulhaber<br>Copyright &#169; 1999 -2006 Cortex Software GmbH<p>
232 Distributed under the Boost Software License, Version 1.0. (See accompanying
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