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| <h2 title="Class ArithmeticEngine" class="title">Class ArithmeticEngine</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <li>freemarker.core.ArithmeticEngine</li> |
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| <dt>Direct Known Subclasses:</dt> |
| <dd><a href="../../freemarker/core/ArithmeticEngine.BigDecimalEngine.html" title="class in freemarker.core">ArithmeticEngine.BigDecimalEngine</a>, <a href="../../freemarker/core/ArithmeticEngine.ConservativeEngine.html" title="class in freemarker.core">ArithmeticEngine.ConservativeEngine</a></dd> |
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| <pre>public abstract class <span class="typeNameLabel">ArithmeticEngine</span> |
| extends java.lang.Object</pre> |
| <div class="block">Used for implementing the arithmetic operations and number comparisons in the template language. The concrete |
| implementation is plugged into the configuration with the <code>arithmetical_engine</code> setting. |
| (See <a href="../../freemarker/core/Configurable.html#setArithmeticEngine-freemarker.core.ArithmeticEngine-"><code>Configurable.setArithmeticEngine(ArithmeticEngine)</code></a>.)</div> |
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| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.BigDecimalEngine.html" title="class in freemarker.core">ArithmeticEngine.BigDecimalEngine</a></span></code> |
| <div class="block">This is the default arithmetic engine in FreeMarker.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.ConservativeEngine.html" title="class in freemarker.core">ArithmeticEngine.ConservativeEngine</a></span></code> |
| <div class="block">An arithmetic engine that conservatively widens the operation arguments |
| to extent that they can hold the result of the operation.</div> |
| </td> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../freemarker/core/ArithmeticEngine.BigDecimalEngine.html" title="class in freemarker.core">ArithmeticEngine.BigDecimalEngine</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#BIGDECIMAL_ENGINE">BIGDECIMAL_ENGINE</a></span></code> |
| <div class="block">Arithmetic engine that converts all numbers to <code>BigDecimal</code> and |
| then operates on them, and also keeps the result as a <code>BigDecimal</code>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../freemarker/core/ArithmeticEngine.ConservativeEngine.html" title="class in freemarker.core">ArithmeticEngine.ConservativeEngine</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#CONSERVATIVE_ENGINE">CONSERVATIVE_ENGINE</a></span></code> |
| <div class="block">Arithmetic engine that uses (more-or-less) the widening conversions of |
| Java language to determine the type of result of operation, instead of |
| converting everything to BigDecimal up front.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#maxScale">maxScale</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#minScale">minScale</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#roundingPolicy">roundingPolicy</a></span></code> </td> |
| </tr> |
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| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#ArithmeticEngine--">ArithmeticEngine</a></span>()</code> </td> |
| </tr> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
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| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#add-java.lang.Number-java.lang.Number-">add</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>abstract int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#compareNumbers-java.lang.Number-java.lang.Number-">compareNumbers</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#divide-java.lang.Number-java.lang.Number-">divide</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#modulus-java.lang.Number-java.lang.Number-">modulus</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#multiply-java.lang.Number-java.lang.Number-">multiply</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#setMaxScale-int-">setMaxScale</a></span>(int maxScale)</code> |
| <div class="block">Sets the maximal scale to use when multiplying BigDecimal numbers.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#setMinScale-int-">setMinScale</a></span>(int minScale)</code> |
| <div class="block">Sets the minimal scale to use when dividing BigDecimal numbers.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#setRoundingPolicy-int-">setRoundingPolicy</a></span>(int roundingPolicy)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#subtract-java.lang.Number-java.lang.Number-">subtract</a></span>(java.lang.Number first, |
| java.lang.Number second)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>abstract java.lang.Number</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../freemarker/core/ArithmeticEngine.html#toNumber-java.lang.String-">toNumber</a></span>(java.lang.String s)</code> |
| <div class="block">Should be able to parse all FTL numerical literals, Java Double toString results, and XML Schema numbers.</div> |
| </td> |
| </tr> |
| </table> |
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| </a> |
| <h3>Methods inherited from class java.lang.Object</h3> |
| <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> |
| </ul> |
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| <h4>BIGDECIMAL_ENGINE</h4> |
| <pre>public static final <a href="../../freemarker/core/ArithmeticEngine.BigDecimalEngine.html" title="class in freemarker.core">ArithmeticEngine.BigDecimalEngine</a> BIGDECIMAL_ENGINE</pre> |
| <div class="block">Arithmetic engine that converts all numbers to <code>BigDecimal</code> and |
| then operates on them, and also keeps the result as a <code>BigDecimal</code>. This is FreeMarker's default arithmetic |
| engine.</div> |
| </li> |
| </ul> |
| <a name="CONSERVATIVE_ENGINE"> |
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| <h4>CONSERVATIVE_ENGINE</h4> |
| <pre>public static final <a href="../../freemarker/core/ArithmeticEngine.ConservativeEngine.html" title="class in freemarker.core">ArithmeticEngine.ConservativeEngine</a> CONSERVATIVE_ENGINE</pre> |
| <div class="block">Arithmetic engine that uses (more-or-less) the widening conversions of |
| Java language to determine the type of result of operation, instead of |
| converting everything to BigDecimal up front.</div> |
| </li> |
| </ul> |
| <a name="minScale"> |
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| </a> |
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| <h4>minScale</h4> |
| <pre>protected int minScale</pre> |
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| <pre>protected int maxScale</pre> |
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| <h4>ArithmeticEngine</h4> |
| <pre>public ArithmeticEngine()</pre> |
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| <pre>public abstract int compareNumbers(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
| </dl> |
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| <h4>add</h4> |
| <pre>public abstract java.lang.Number add(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
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| <pre>public abstract java.lang.Number subtract(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
| </dl> |
| </li> |
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| <a name="multiply-java.lang.Number-java.lang.Number-"> |
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| <h4>multiply</h4> |
| <pre>public abstract java.lang.Number multiply(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="divide-java.lang.Number-java.lang.Number-"> |
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| <h4>divide</h4> |
| <pre>public abstract java.lang.Number divide(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>modulus</h4> |
| <pre>public abstract java.lang.Number modulus(java.lang.Number first, |
| java.lang.Number second) |
| throws <a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></pre> |
| <dl> |
| <dt><span class="throwsLabel">Throws:</span></dt> |
| <dd><code><a href="../../freemarker/template/TemplateException.html" title="class in freemarker.template">TemplateException</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>toNumber</h4> |
| <pre>public abstract java.lang.Number toNumber(java.lang.String s)</pre> |
| <div class="block">Should be able to parse all FTL numerical literals, Java Double toString results, and XML Schema numbers. |
| This means these should be parsed successfully, except if the arithmetical engine |
| couldn't support the resulting value anyway (such as NaN, infinite, even non-integers): |
| <code>-123.45</code>, <code>1.5e3</code>, <code>1.5E3</code>, <code>0005</code>, <code>+0</code>, <code>-0</code>, <code>NaN</code>, |
| <code>INF</code>, <code>-INF</code>, <code>Infinity</code>, <code>-Infinity</code>.</div> |
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| <h4>setMinScale</h4> |
| <pre>public void setMinScale(int minScale)</pre> |
| <div class="block">Sets the minimal scale to use when dividing BigDecimal numbers. Default |
| value is 12.</div> |
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| <pre>public void setMaxScale(int maxScale)</pre> |
| <div class="block">Sets the maximal scale to use when multiplying BigDecimal numbers. |
| Default value is 100.</div> |
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| <h4>setRoundingPolicy</h4> |
| <pre>public void setRoundingPolicy(int roundingPolicy)</pre> |
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