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<div class="headertitle"><div class="title">AffineExpression.java</div></div>
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<a href="AffineExpression_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">// Copyright 2010-2021 Google LLC</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Licensed under the Apache License, Version 2.0 (the &quot;License&quot;);</span></div>
<div class="line"><a id="l00003" 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 id="l00004" 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 id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
<div class="line"><a id="l00006" 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 id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
<div class="line"><a id="l00008" 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 id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">// distributed under the License is distributed on an &quot;AS IS&quot; BASIS,</span></div>
<div class="line"><a id="l00010" 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 id="l00011" 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 id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment">// limitations under the License.</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span> </div>
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<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"><a class="line" href="namespacecom_1_1google_1_1ortools_1_1sat.html"> 14</a></span><span class="keyword">package </span>com.google.ortools.sat;</div>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html"> 17</a></span><span class="keyword">public</span> <span class="keyword">final</span> <span class="keyword">class </span><a class="code hl_class" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html">AffineExpression</a> <span class="keyword">implements</span> <a class="code hl_interface" href="interfacecom_1_1google_1_1ortools_1_1sat_1_1LinearExpr.html">LinearExpr</a> {</div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">private</span> <span class="keyword">final</span> <span class="keywordtype">int</span> varIndex;</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">private</span> <span class="keyword">final</span> <span class="keywordtype">long</span> coefficient;</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">private</span> <span class="keyword">final</span> <span class="keywordtype">long</span> offset;</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a435f79f3a8a693ea23d12436126cfc57"> 22</a></span> <span class="keyword">public</span> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a435f79f3a8a693ea23d12436126cfc57">AffineExpression</a>(<span class="keywordtype">int</span> varIndex, <span class="keywordtype">long</span> coefficient, <span class="keywordtype">long</span> offset) {</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> this.varIndex = varIndex;</div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span> this.coefficient = coefficient;</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> this.offset = offset;</div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> }</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span> <span class="comment">// LinearArgument interface.</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> @Override</div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a68a038d4ae2f7cf74dfa8e8fe21c4feb"> 30</a></span> <span class="keyword">public</span> <a class="code hl_interface" href="interfacecom_1_1google_1_1ortools_1_1sat_1_1LinearExpr.html">LinearExpr</a> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a68a038d4ae2f7cf74dfa8e8fe21c4feb">build</a>() {</div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> <span class="keywordflow">return</span> <span class="keyword">this</span>;</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> }</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="comment">// LinearExpr interface.</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> @Override</div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a59f9cb76db051cd784a42f38220f896d"> 36</a></span> <span class="keyword">public</span> <span class="keywordtype">int</span> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a59f9cb76db051cd784a42f38220f896d">numElements</a>() {</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> <span class="keywordflow">return</span> 1;</div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> }</div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> @Override</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#ae9592a449a7c3bdebd04b8ea4f174871"> 41</a></span> <span class="keyword">public</span> <span class="keywordtype">int</span> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#ae9592a449a7c3bdebd04b8ea4f174871">getVariableIndex</a>(<span class="keywordtype">int</span> index) {</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> <span class="keywordflow">if</span> (index != 0) {</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">throw</span> <span class="keyword">new</span> IllegalArgumentException(<span class="stringliteral">&quot;wrong index in LinearExpr.getIndex(): &quot;</span> + index);</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> }</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">return</span> varIndex;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> }</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> @Override</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a2c77626134edecc47b69efe661ea1904"> 49</a></span> <span class="keyword">public</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a2c77626134edecc47b69efe661ea1904">getCoefficient</a>(<span class="keywordtype">int</span> index) {</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">if</span> (index != 0) {</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <span class="keywordflow">throw</span> <span class="keyword">new</span> IllegalArgumentException(<span class="stringliteral">&quot;wrong index in LinearExpr.getCoefficient(): &quot;</span> + index);</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> }</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">return</span> coefficient;</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> @Override</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#aa7d6a5c7e69f4efdc6a44b85bbe22f1a"> 57</a></span> <span class="keyword">public</span> <span class="keywordtype">long</span> <a class="code hl_function" href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#aa7d6a5c7e69f4efdc6a44b85bbe22f1a">getOffset</a>() {</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="keywordflow">return</span> offset;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> }</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span>}</div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html">com.google.ortools.sat.AffineExpression</a></div><div class="ttdoc">A specialized linear expression: a * x + b.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00017">AffineExpression.java:17</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_a2c77626134edecc47b69efe661ea1904"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a2c77626134edecc47b69efe661ea1904">com.google.ortools.sat.AffineExpression.getCoefficient</a></div><div class="ttdeci">long getCoefficient(int index)</div><div class="ttdoc">Returns the ith coefficient.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00049">AffineExpression.java:49</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_a435f79f3a8a693ea23d12436126cfc57"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a435f79f3a8a693ea23d12436126cfc57">com.google.ortools.sat.AffineExpression.AffineExpression</a></div><div class="ttdeci">AffineExpression(int varIndex, long coefficient, long offset)</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00022">AffineExpression.java:22</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_a59f9cb76db051cd784a42f38220f896d"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a59f9cb76db051cd784a42f38220f896d">com.google.ortools.sat.AffineExpression.numElements</a></div><div class="ttdeci">int numElements()</div><div class="ttdoc">Returns the number of terms (excluding the constant one) in this expression.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00036">AffineExpression.java:36</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_a68a038d4ae2f7cf74dfa8e8fe21c4feb"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#a68a038d4ae2f7cf74dfa8e8fe21c4feb">com.google.ortools.sat.AffineExpression.build</a></div><div class="ttdeci">LinearExpr build()</div><div class="ttdoc">Builds a linear expression.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00030">AffineExpression.java:30</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_aa7d6a5c7e69f4efdc6a44b85bbe22f1a"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#aa7d6a5c7e69f4efdc6a44b85bbe22f1a">com.google.ortools.sat.AffineExpression.getOffset</a></div><div class="ttdeci">long getOffset()</div><div class="ttdoc">Returns the constant part of the expression.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00057">AffineExpression.java:57</a></div></div>
<div class="ttc" id="aclasscom_1_1google_1_1ortools_1_1sat_1_1AffineExpression_html_ae9592a449a7c3bdebd04b8ea4f174871"><div class="ttname"><a href="classcom_1_1google_1_1ortools_1_1sat_1_1AffineExpression.html#ae9592a449a7c3bdebd04b8ea4f174871">com.google.ortools.sat.AffineExpression.getVariableIndex</a></div><div class="ttdeci">int getVariableIndex(int index)</div><div class="ttdoc">Returns the index of the ith variable.</div><div class="ttdef"><b>Definition:</b> <a href="AffineExpression_8java_source.html#l00041">AffineExpression.java:41</a></div></div>
<div class="ttc" id="ainterfacecom_1_1google_1_1ortools_1_1sat_1_1LinearExpr_html"><div class="ttname"><a href="interfacecom_1_1google_1_1ortools_1_1sat_1_1LinearExpr.html">com.google.ortools.sat.LinearExpr</a></div><div class="ttdoc">A linear expression (sum (ai * xi) + b).</div><div class="ttdef"><b>Definition:</b> <a href="LinearExpr_8java_source.html#l00019">LinearExpr.java:19</a></div></div>
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