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<div class="subTitle">org.apache.mahout.math.set</div>
<h2 title="Class AbstractSet" class="title">Class AbstractSet</h2>
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<pre>public abstract class <span class="typeNameLabel">AbstractSet</span>
extends <a href="../../../../../org/apache/mahout/math/PersistentObject.html" title="class in org.apache.mahout.math">PersistentObject</a></pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../serialized-form.html#org.apache.mahout.math.set.AbstractSet">Serialized Form</a></dd>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
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<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#DEFAULT_CAPACITY">DEFAULT_CAPACITY</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#DEFAULT_MAX_LOAD_FACTOR">DEFAULT_MAX_LOAD_FACTOR</a></span></code>&nbsp;</td>
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<tr class="altColor">
<td class="colFirst"><code>static double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#DEFAULT_MIN_LOAD_FACTOR">DEFAULT_MIN_LOAD_FACTOR</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#distinct">distinct</a></span></code>
<div class="block">The number of distinct associations in the map; its "size()".</div>
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<tr class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#highWaterMark">highWaterMark</a></span></code>&nbsp;</td>
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<tr class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#lowWaterMark">lowWaterMark</a></span></code>
<div class="block">The table capacity c=table.length always satisfies the invariant <tt>c * minLoadFactor <= s <= c *
maxLoadFactor</tt>, where s=size() is the number of associations currently contained.</div>
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<tr class="altColor">
<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#maxLoadFactor">maxLoadFactor</a></span></code>
<div class="block">The maximum load factor for the hashtable.</div>
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<tr class="rowColor">
<td class="colFirst"><code>protected double</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#minLoadFactor">minLoadFactor</a></span></code>
<div class="block">The minimum load factor for the hashtable.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#AbstractSet--">AbstractSet</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#chooseGrowCapacity-int-double-double-">chooseGrowCapacity</a></span>(int&nbsp;size,
double&nbsp;minLoad,
double&nbsp;maxLoad)</code>
<div class="block">Chooses a new prime table capacity optimized for growing that (approximately) satisfies the invariant <tt>c *
minLoadFactor <= size <= c * maxLoadFactor</tt> and has at least one FREE slot for the given size.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#chooseHighWaterMark-int-double-">chooseHighWaterMark</a></span>(int&nbsp;capacity,
double&nbsp;maxLoad)</code>
<div class="block">Returns new high water mark threshold based on current capacity and maxLoadFactor.</div>
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<tr id="i2" class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#chooseLowWaterMark-int-double-">chooseLowWaterMark</a></span>(int&nbsp;capacity,
double&nbsp;minLoad)</code>
<div class="block">Returns new low water mark threshold based on current capacity and minLoadFactor.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#chooseMeanCapacity-int-double-double-">chooseMeanCapacity</a></span>(int&nbsp;size,
double&nbsp;minLoad,
double&nbsp;maxLoad)</code>
<div class="block">Chooses a new prime table capacity neither favoring shrinking nor growing, that (approximately) satisfies the
invariant <tt>c * minLoadFactor <= size <= c * maxLoadFactor</tt> and has at least one FREE slot for the given
size.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#chooseShrinkCapacity-int-double-double-">chooseShrinkCapacity</a></span>(int&nbsp;size,
double&nbsp;minLoad,
double&nbsp;maxLoad)</code>
<div class="block">Chooses a new prime table capacity optimized for shrinking that (approximately) satisfies the invariant <tt>c *
minLoadFactor <= size <= c * maxLoadFactor</tt> and has at least one FREE slot for the given size.</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#clear--">clear</a></span>()</code>
<div class="block">Removes all (key,value) associations from the receiver.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#ensureCapacity-int-">ensureCapacity</a></span>(int&nbsp;minCapacity)</code>
<div class="block">Ensures that the receiver can hold at least the specified number of elements without needing to allocate new
internal memory.</div>
</td>
</tr>
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<td class="colFirst"><code>protected static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#equalsMindTheNull-java.lang.Object-java.lang.Object-">equalsMindTheNull</a></span>(<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;a,
<a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a>&nbsp;b)</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#isEmpty--">isEmpty</a></span>()</code>
<div class="block">Returns <tt>true</tt> if the receiver contains no (key,value) associations.</div>
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<td class="colFirst"><code>protected int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#nextPrime-int-">nextPrime</a></span>(int&nbsp;desiredCapacity)</code>
<div class="block">Returns a prime number which is <code>&gt;= desiredCapacity</code> and very close to <code>desiredCapacity</code>
(within 11% if <code>desiredCapacity &gt;= 1000</code>).</div>
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<td class="colFirst"><code>protected void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#setUp-int-double-double-">setUp</a></span>(int&nbsp;initialCapacity,
double&nbsp;minLoadFactor,
double&nbsp;maxLoadFactor)</code>
<div class="block">Initializes the receiver.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#size--">size</a></span>()</code>
<div class="block">Returns the number of (key,value) associations currently contained.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/mahout/math/set/AbstractSet.html#trimToSize--">trimToSize</a></span>()</code>
<div class="block">Trims the capacity of the receiver to be the receiver's current size.</div>
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<code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li>
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<pre>protected&nbsp;int distinct</pre>
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maxLoadFactor</tt>, where s=size() is the number of associations currently contained. The term "c * minLoadFactor"
is called the "lowWaterMark", "c * maxLoadFactor" is called the "highWaterMark". In other words, the table capacity
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and cached to avoid recalculating them each time put(..) or removeKey(...) is called.</div>
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<pre>protected&nbsp;double minLoadFactor</pre>
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<pre>protected&nbsp;double maxLoadFactor</pre>
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<pre>public&nbsp;AbstractSet()</pre>
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<pre>protected&nbsp;int&nbsp;chooseGrowCapacity(int&nbsp;size,
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minLoadFactor <= size <= c * maxLoadFactor</tt> and has at least one FREE slot for the given size.</div>
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<pre>protected&nbsp;int&nbsp;chooseHighWaterMark(int&nbsp;capacity,
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<pre>protected&nbsp;int&nbsp;chooseMeanCapacity(int&nbsp;size,
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minLoadFactor <= size <= c * maxLoadFactor</tt> and has at least one FREE slot for the given size.</div>
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<pre>public abstract&nbsp;void&nbsp;clear()</pre>
<div class="block">Removes all (key,value) associations from the receiver.</div>
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<pre>public&nbsp;void&nbsp;ensureCapacity(int&nbsp;minCapacity)</pre>
<div class="block">Ensures that the receiver can hold at least the specified number of elements without needing to allocate new
internal memory. If necessary, allocates new internal memory and increases the capacity of the receiver. <p> This
method never need be called; it is for performance tuning only. Calling this method before <tt>put()</tt>ing a
large number of associations boosts performance, because the receiver will grow only once instead of potentially
many times. <p> <b>This default implementation does nothing.</b> Override this method if necessary.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>minCapacity</code> - the desired minimum capacity.</dd>
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<div class="block">Returns <tt>true</tt> if the receiver contains no (key,value) associations.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd><tt>true</tt> if the receiver contains no (key,value) associations.</dd>
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<pre>protected&nbsp;int&nbsp;nextPrime(int&nbsp;desiredCapacity)</pre>
<div class="block">Returns a prime number which is <code>&gt;= desiredCapacity</code> and very close to <code>desiredCapacity</code>
(within 11% if <code>desiredCapacity &gt;= 1000</code>).</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>desiredCapacity</code> - the capacity desired by the user.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the capacity which should be used for a hashtable.</dd>
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<pre>protected&nbsp;void&nbsp;setUp(int&nbsp;initialCapacity,
double&nbsp;minLoadFactor,
double&nbsp;maxLoadFactor)</pre>
<div class="block">Initializes the receiver. You will almost certainly need to override this method in subclasses to initialize the
hash table.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>initialCapacity</code> - the initial capacity of the receiver.</dd>
<dd><code>minLoadFactor</code> - the minLoadFactor of the receiver.</dd>
<dd><code>maxLoadFactor</code> - the maxLoadFactor of the receiver.</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="http://docs.oracle.com/javase/7/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang">IllegalArgumentException</a></code> - if <tt>initialCapacity < 0 || (minLoadFactor < 0.0 || minLoadFactor >= 1.0) ||
(maxLoadFactor <= 0.0 || maxLoadFactor >= 1.0) || (minLoadFactor >=
maxLoadFactor)</tt>.</dd>
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<pre>public&nbsp;int&nbsp;size()</pre>
<div class="block">Returns the number of (key,value) associations currently contained.</div>
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<dd>the number of (key,value) associations currently contained.</dd>
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<pre>public&nbsp;void&nbsp;trimToSize()</pre>
<div class="block">Trims the capacity of the receiver to be the receiver's current size. Releases any superfluous internal memory. An
application can use this operation to minimize the storage of the receiver. <p> This default implementation does
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