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<div class="subTitle">org.apache.hadoop.hdfs.util</div>
<h2 title="Class LightWeightLinkedSet" class="title">Class LightWeightLinkedSet&lt;T&gt;</h2>
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<li><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">org.apache.hadoop.hdfs.util.LightWeightHashSet</a>&lt;T&gt;</li>
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<li>org.apache.hadoop.hdfs.util.LightWeightLinkedSet&lt;T&gt;</li>
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<pre>public class <span class="typeNameLabel">LightWeightLinkedSet&lt;T&gt;</span>
extends <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;T&gt;</pre>
<div class="block">A low memory linked hash set implementation, which uses an array for storing
the elements and linked lists for collision resolution. In addition it stores
elements in a linked list to ensure ordered traversal. This class does not
support null element.
This class is not thread safe.</div>
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<h3>Fields inherited from class&nbsp;org.apache.hadoop.hdfs.util.<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a></h3>
<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#DEFAULT_MAX_LOAD_FACTOR">DEFAULT_MAX_LOAD_FACTOR</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#DEFAUT_MIN_LOAD_FACTOR">DEFAUT_MIN_LOAD_FACTOR</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#entries">entries</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#MINIMUM_CAPACITY">MINIMUM_CAPACITY</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#modification">modification</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#size">size</a></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#LightWeightLinkedSet--">LightWeightLinkedSet</a></span>()</code>&nbsp;</td>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#LightWeightLinkedSet-int-float-float-">LightWeightLinkedSet</a></span>(int&nbsp;initCapacity,
float&nbsp;maxLoadFactor,
float&nbsp;minLoadFactor)</code>&nbsp;</td>
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<td class="colFirst"><code>protected boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#addElem-T-">addElem</a></span>(<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&nbsp;element)</code>
<div class="block">Add given element to the hash table</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#clear--">clear</a></span>()</code>
<div class="block">Clear the set.</div>
</td>
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<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#getBookmark--">getBookmark</a></span>()</code>
<div class="block">Returns a new iterator starting at the bookmarked element.</div>
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<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#iterator--">iterator</a></span>()</code>&nbsp;</td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#pollAll--">pollAll</a></span>()</code>
<div class="block">Remove all elements from the set and return them in order.</div>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#pollFirst--">pollFirst</a></span>()</code>
<div class="block">Remove and return first element on the linked list of all elements.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#pollN-int-">pollN</a></span>(int&nbsp;n)</code>
<div class="block">Remove and return n elements from the hashtable.</div>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>protected org.apache.hadoop.hdfs.util.LightWeightLinkedSet.DoubleLinkedElement&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#removeElem-T-">removeElem</a></span>(<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&nbsp;key)</code>
<div class="block">Remove the element corresponding to the key, given key.hashCode() == index.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#resetBookmark--">resetBookmark</a></span>()</code>
<div class="block">Resets the bookmark to the beginning of the list.</div>
</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>&lt;U&gt;&nbsp;U[]</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html#toArray-U:A-">toArray</a></span>(U[]&nbsp;a)</code>&nbsp;</td>
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<h3>Methods inherited from class&nbsp;org.apache.hadoop.hdfs.util.<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a></h3>
<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#add-T-">add</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#addAll-java.util.Collection-">addAll</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#contains-java.lang.Object-">contains</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#containsAll-java.util.Collection-">containsAll</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#expandIfNecessary--">expandIfNecessary</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#getCapacity--">getCapacity</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#getContainedElem-int-T-int-">getContainedElem</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#getElement-T-">getElement</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#getIndex-int-">getIndex</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#isEmpty--">isEmpty</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#pollToArray-T:A-">pollToArray</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#printDetails-java.io.PrintStream-">printDetails</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#remove-java.lang.Object-">remove</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#removeAll-java.util.Collection-">removeAll</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#retainAll-java.util.Collection-">retainAll</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#shrinkIfNecessary--">shrinkIfNecessary</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#size--">size</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#toArray--">toArray</a>, <a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#toString--">toString</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.util">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#hashCode--" title="class or interface in java.util">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#parallelStream--" title="class or interface in java.util">parallelStream</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#removeIf-java.util.function.Predicate-" title="class or interface in java.util">removeIf</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#spliterator--" title="class or interface in java.util">spliterator</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#stream--" title="class or interface in java.util">stream</a></code></li>
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<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#forEach-java.util.function.Consumer-" title="class or interface in java.lang">forEach</a></code></li>
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<h4>LightWeightLinkedSet</h4>
<pre>public&nbsp;LightWeightLinkedSet(int&nbsp;initCapacity,
float&nbsp;maxLoadFactor,
float&nbsp;minLoadFactor)</pre>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>initCapacity</code> - Recommended size of the internal array.</dd>
<dd><code>maxLoadFactor</code> - used to determine when to expand the internal array</dd>
<dd><code>minLoadFactor</code> - used to determine when to shrink the internal array</dd>
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<pre>public&nbsp;LightWeightLinkedSet()</pre>
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<pre>protected&nbsp;boolean&nbsp;addElem(<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&nbsp;element)</pre>
<div class="block">Add given element to the hash table</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#addElem-T-">addElem</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
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<dd>true if the element was not present in the table, false otherwise</dd>
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<pre>protected&nbsp;org.apache.hadoop.hdfs.util.LightWeightLinkedSet.DoubleLinkedElement&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;&nbsp;removeElem(<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&nbsp;key)</pre>
<div class="block">Remove the element corresponding to the key, given key.hashCode() == index.</div>
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<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#removeElem-T-">removeElem</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Return the entry with the element if exists. Otherwise return null.</dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&nbsp;pollFirst()</pre>
<div class="block">Remove and return first element on the linked list of all elements.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>first element</dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;&nbsp;pollN(int&nbsp;n)</pre>
<div class="block">Remove and return n elements from the hashtable.
The order in which entries are removed is corresponds
to the order in which they were inserted.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#pollN-int-">pollN</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>first element</dd>
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<h4>pollAll</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;&nbsp;pollAll()</pre>
<div class="block">Remove all elements from the set and return them in order. Traverse the
link list, don't worry about hashtable - faster version of the parent
method.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#pollAll--">pollAll</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
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<pre>public&nbsp;&lt;U&gt;&nbsp;U[]&nbsp;toArray(U[]&nbsp;a)</pre>
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#toArray-T:A-" title="class or interface in java.util">toArray</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#toArray-U:A-">toArray</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
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<h4>iterator</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;&nbsp;iterator()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#iterator--" title="class or interface in java.util">iterator</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#iterator--">iterator</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
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<h4>clear</h4>
<pre>public&nbsp;void&nbsp;clear()</pre>
<div class="block">Clear the set. Resize it to the original capacity.</div>
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<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true#clear--" title="class or interface in java.util">clear</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
<dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
<dd><code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html#clear--">clear</a></code>&nbsp;in class&nbsp;<code><a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightHashSet.html" title="class in org.apache.hadoop.hdfs.util">LightWeightHashSet</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;</code></dd>
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<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="class or interface in java.util">Iterator</a>&lt;<a href="../../../../../org/apache/hadoop/hdfs/util/LightWeightLinkedSet.html" title="type parameter in LightWeightLinkedSet">T</a>&gt;&nbsp;getBookmark()</pre>
<div class="block">Returns a new iterator starting at the bookmarked element.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<pre>public&nbsp;void&nbsp;resetBookmark()</pre>
<div class="block">Resets the bookmark to the beginning of the list.</div>
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