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<a href="StopAfterNSolutionsSampleSat_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2010-2018 Google LLC</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// You may obtain a copy of the License at</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">//</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// See the License for the specific language governing permissions and</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// limitations under the License.</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="keyword">import</span> <a class="code" href="namespacecom.html">com</a>.<a class="code" href="namespacecom_1_1google.html">google</a>.<a class="code" href="namespacecom_1_1google_1_1ortools.html">ortools</a>.<a class="code" href="namespacecom_1_1google_1_1ortools_1_1sat.html">sat</a>.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html">CpModel</a>;</div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">import</span> <a class="code" href="namespacecom.html">com</a>.<a class="code" href="namespacecom_1_1google.html">google</a>.<a class="code" href="namespacecom_1_1google_1_1ortools.html">ortools</a>.<a class="code" href="namespacecom_1_1google_1_1ortools_1_1sat.html">sat</a>.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html">CpSolver</a>;</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">import</span> <a class="code" href="namespacecom.html">com</a>.<a class="code" href="namespacecom_1_1google.html">google</a>.<a class="code" href="namespacecom_1_1google_1_1ortools.html">ortools</a>.<a class="code" href="namespacecom_1_1google_1_1ortools_1_1sat.html">sat</a>.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolverSolutionCallback.html">CpSolverSolutionCallback</a>;</div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">import</span> <a class="code" href="namespacecom.html">com</a>.<a class="code" href="namespacecom_1_1google.html">google</a>.<a class="code" href="namespacecom_1_1google_1_1ortools.html">ortools</a>.<a class="code" href="namespacecom_1_1google_1_1ortools_1_1sat.html">sat</a>.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a>;</div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div><div class="line"><a name="l00020"></a><span class="lineno"><a class="line" href="classStopAfterNSolutionsSampleSat.html"> 20</a></span> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classStopAfterNSolutionsSampleSat.html">StopAfterNSolutionsSampleSat</a> {</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  <span class="keyword">static</span> {</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  System.loadLibrary(<span class="stringliteral">"jniortools"</span>);</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  }</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  <span class="keyword">static</span> <span class="keyword">class </span>VarArraySolutionPrinterWithLimit <span class="keyword">extends</span> <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolverSolutionCallback.html">CpSolverSolutionCallback</a> {</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span>  <span class="keyword">public</span> VarArraySolutionPrinterWithLimit(<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a>[] variables, <span class="keywordtype">int</span> limit) {</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  variableArray = variables;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  solutionLimit = limit;</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  }</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  @Override</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keyword">public</span> <span class="keywordtype">void</span> onSolutionCallback() {</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  System.out.printf(<span class="stringliteral">"Solution #%d: time = %.02f s%n"</span>, solutionCount, wallTime());</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keywordflow">for</span> (<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a> v : variableArray) {</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  System.out.printf(<span class="stringliteral">" %s = %d%n"</span>, v.getName(), value(v));</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  }</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  solutionCount++;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">if</span> (solutionCount >= solutionLimit) {</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  System.out.printf(<span class="stringliteral">"Stop search after %d solutions%n"</span>, solutionLimit);</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  stopSearch();</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  }</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  }</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="keyword">public</span> <span class="keywordtype">int</span> getSolutionCount() {</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keywordflow">return</span> solutionCount;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  }</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">private</span> <span class="keywordtype">int</span> solutionCount;</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  <span class="keyword">private</span> <span class="keyword">final</span> <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a>[] variableArray;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">private</span> <span class="keyword">final</span> <span class="keywordtype">int</span> solutionLimit;</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  }</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="classStopAfterNSolutionsSampleSat.html#a8e39fb60ce7dd8044f57713d7db1adc3"> 53</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="classStopAfterNSolutionsSampleSat.html#a8e39fb60ce7dd8044f57713d7db1adc3">main</a>(String[] args) <span class="keywordflow">throws</span> Exception {</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// Create the model.</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html">CpModel</a> model = <span class="keyword">new</span> <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html">CpModel</a>();</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// Create the variables.</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordtype">int</span> numVals = 3;</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a> x = model.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html#a78e6aa0bcdec9be8fc0d39c46b94d851">newIntVar</a>(0, numVals - 1, <span class="stringliteral">"x"</span>);</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a> y = model.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html#a78e6aa0bcdec9be8fc0d39c46b94d851">newIntVar</a>(0, numVals - 1, <span class="stringliteral">"y"</span>);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a> z = model.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html#a78e6aa0bcdec9be8fc0d39c46b94d851">newIntVar</a>(0, numVals - 1, <span class="stringliteral">"z"</span>);</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="comment">// Create a solver and solve the model.</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html">CpSolver</a> solver = <span class="keyword">new</span> <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html">CpSolver</a>();</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  VarArraySolutionPrinterWithLimit cb =</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keyword">new</span> VarArraySolutionPrinterWithLimit(<span class="keyword">new</span> <a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">IntVar</a>[] {x, y, z}, 5);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  solver.<a class="code" href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html#ad64fabf13468253f9f080e4eeb1d3655">searchAllSolutions</a>(model, cb);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  System.out.println(cb.getSolutionCount() + <span class="stringliteral">" solutions found."</span>);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">if</span> (cb.getSolutionCount() != 5) {</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">throw</span> <span class="keyword">new</span> RuntimeException(<span class="stringliteral">"Did not stop the search correctly."</span>);</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  }</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div><div class="ttc" id="namespacecom_1_1google_1_1ortools_1_1sat_html"><div class="ttname"><a href="namespacecom_1_1google_1_1ortools_1_1sat.html">com.google.ortools.sat</a></div><div class="ttdef"><b>Definition:</b> <a href="AllDifferentConstraintProto_8java_source.html#l00004">AllDifferentConstraintProto.java:4</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver_html"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html">com.google.ortools.sat.CpSolver</a></div><div class="ttdoc">Wrapper around the SAT solver.</div><div class="ttdef"><b>Definition:</b> <a href="CpSolver_8java_source.html#l00026">CpSolver.java:26</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel_html_a78e6aa0bcdec9be8fc0d39c46b94d851"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html#a78e6aa0bcdec9be8fc0d39c46b94d851">com.google.ortools.sat.CpModel.newIntVar</a></div><div class="ttdeci">IntVar newIntVar(long lb, long ub, String name)</div><div class="ttdoc">Creates an integer variable with domain [lb, ub].</div><div class="ttdef"><b>Definition:</b> <a href="CpModel_8java_source.html#l00069">CpModel.java:69</a></div></div>
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<div class="ttc" id="classStopAfterNSolutionsSampleSat_html"><div class="ttname"><a href="classStopAfterNSolutionsSampleSat.html">StopAfterNSolutionsSampleSat</a></div><div class="ttdoc">Code sample that solves a model and displays a small number of solutions.</div><div class="ttdef"><b>Definition:</b> <a href="StopAfterNSolutionsSampleSat_8java_source.html#l00020">StopAfterNSolutionsSampleSat.java:20</a></div></div>
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<div class="ttc" id="namespacecom_html"><div class="ttname"><a href="namespacecom.html">com</a></div></div>
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<div class="ttc" id="namespacecom_1_1google_1_1ortools_html"><div class="ttname"><a href="namespacecom_1_1google_1_1ortools.html">com.google.ortools</a></div></div>
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<div class="ttc" id="classStopAfterNSolutionsSampleSat_html_a8e39fb60ce7dd8044f57713d7db1adc3"><div class="ttname"><a href="classStopAfterNSolutionsSampleSat.html#a8e39fb60ce7dd8044f57713d7db1adc3">StopAfterNSolutionsSampleSat.main</a></div><div class="ttdeci">static void main(String[] args)</div><div class="ttdef"><b>Definition:</b> <a href="StopAfterNSolutionsSampleSat_8java_source.html#l00053">StopAfterNSolutionsSampleSat.java:53</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar_html"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1IntVar.html">com.google.ortools.sat.IntVar</a></div><div class="ttdoc">An integer variable.</div><div class="ttdef"><b>Definition:</b> <a href="com_2google_2ortools_2sat_2IntVar_8java_source.html#l00021">com/google/ortools/sat/IntVar.java:21</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel_html"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1CpModel.html">com.google.ortools.sat.CpModel</a></div><div class="ttdoc">Main modeling class.</div><div class="ttdef"><b>Definition:</b> <a href="CpModel_8java_source.html#l00040">CpModel.java:40</a></div></div>
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<div class="ttc" id="namespacecom_1_1google_html"><div class="ttname"><a href="namespacecom_1_1google.html">com.google</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver_html_ad64fabf13468253f9f080e4eeb1d3655"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolver.html#ad64fabf13468253f9f080e4eeb1d3655">com.google.ortools.sat.CpSolver.searchAllSolutions</a></div><div class="ttdeci">CpSolverStatus searchAllSolutions(CpModel model, CpSolverSolutionCallback cb)</div><div class="ttdoc">Searches for all solutions of a satisfiability problem.</div><div class="ttdef"><b>Definition:</b> <a href="CpSolver_8java_source.html#l00057">CpSolver.java:57</a></div></div>
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<div class="ttc" id="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolverSolutionCallback_html"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1CpSolverSolutionCallback.html">com.google.ortools.sat.CpSolverSolutionCallback</a></div><div class="ttdoc">Parent class to create a callback called at each solution.</div><div class="ttdef"><b>Definition:</b> <a href="CpSolverSolutionCallback_8java_source.html#l00039">CpSolverSolutionCallback.java:39</a></div></div>
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