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<div class="subTitle">org.janusgraph.util.encoding</div> |
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<h2 title="Class NumericUtils" class="title">Class NumericUtils</h2> |
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<li>org.janusgraph.util.encoding.NumericUtils</li> |
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<pre>public final class <span class="typeNameLabel">NumericUtils</span> |
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extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
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<div class="block">This file is copied verbatim from Apache Lucene NumericUtils.java |
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Only the double/float to sortable long/int conversions are retained.</div> |
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<td class="colFirst"><code>static long</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#doubleToSortableLong-double-">doubleToSortableLong</a></span>(double val)</code> |
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<div class="block">Converts a <code>double</code> value to a sortable signed <code>long</code>.</div> |
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<td class="colFirst"><code>static int</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#floatToSortableInt-float-">floatToSortableInt</a></span>(float val)</code> |
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<div class="block">Converts a <code>float</code> value to a sortable signed <code>int</code>.</div> |
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<td class="colFirst"><code>static long</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableDoubleBits-long-">sortableDoubleBits</a></span>(long bits)</code> |
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<div class="block">Converts IEEE 754 representation of a double to sortable order (or back to the original)</div> |
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<td class="colFirst"><code>static int</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableFloatBits-int-">sortableFloatBits</a></span>(int bits)</code> |
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<div class="block">Converts IEEE 754 representation of a float to sortable order (or back to the original)</div> |
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<td class="colFirst"><code>static float</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableIntToFloat-int-">sortableIntToFloat</a></span>(int val)</code> |
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<div class="block">Converts a sortable <code>int</code> back to a <code>float</code>.</div> |
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<td class="colFirst"><code>static double</code></td> |
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableLongToDouble-long-">sortableLongToDouble</a></span>(long val)</code> |
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<div class="block">Converts a sortable <code>long</code> back to a <code>double</code>.</div> |
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<pre>public static long doubleToSortableLong(double val)</pre> |
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<div class="block">Converts a <code>double</code> value to a sortable signed <code>long</code>. |
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The value is converted by getting their IEEE 754 floating-point "double format" |
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bit layout and then some bits are swapped, to be able to compare the result as long. |
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By this the precision is not reduced, but the value can easily used as a long. |
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The sort order (including <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true#NaN" title="class or interface in java.lang"><code>Double.NaN</code></a>) is defined by |
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<dd><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableLongToDouble-long-"><code>sortableLongToDouble(long)</code></a></dd> |
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<pre>public static double sortableLongToDouble(long val)</pre> |
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<div class="block">Converts a sortable <code>long</code> back to a <code>double</code>.</div> |
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<pre>public static int floatToSortableInt(float val)</pre> |
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<div class="block">Converts a <code>float</code> value to a sortable signed <code>int</code>. |
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The value is converted by getting their IEEE 754 floating-point "float format" |
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bit layout and then some bits are swapped, to be able to compare the result as int. |
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By this the precision is not reduced, but the value can easily used as an int. |
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The sort order (including <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Float.html?is-external=true#NaN" title="class or interface in java.lang"><code>Float.NaN</code></a>) is defined by |
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<dd><a href="../../../../org/janusgraph/util/encoding/NumericUtils.html#sortableIntToFloat-int-"><code>sortableIntToFloat(int)</code></a></dd> |
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