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apache / hadoop-site / 952d547359cafef280f0a0324055741b2ed55be1 / . / content / docs / r3.3.1 / hadoop-project-dist / hadoop-hdfs / build / source / hadoop-hdfs-project / hadoop-hdfs / target / api / org / apache / hadoop / hdfs / server / namenode / snapshot / DiffList.html
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<div class="subTitle">org.apache.hadoop.hdfs.server.namenode.snapshot</div>
<h2 title="Interface DiffList" class="title">Interface DiffList&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;</h2>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - Type of the object in this list.</dd>
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<dt>All Superinterfaces:</dt>
<dd><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;T&gt;</dd>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffListByArrayList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffListByArrayList</a>, <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffListBySkipList.html" title="class in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffListBySkipList</a></dd>
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<pre>public interface <span class="typeNameLabel">DiffList&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;</span>
extends <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;T&gt;</pre>
<div class="block">This interface defines the methods used to store and manage InodeDiffs.</div>
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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>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static <a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#EMPTY_LIST">EMPTY_LIST</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="t5" class="tableTab"><span><a href="javascript:show(16);">Default Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#addFirst-T-">addFirst</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;t)</code>
<div class="block">Adds an element at the beginning of the list.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#addLast-T-">addLast</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;t)</code>
<div class="block">Adds an element at the end of the list.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#binarySearch-int-">binarySearch</a></span>(int&nbsp;key)</code>
<div class="block">Searches the list for the specified object using the binary
search algorithm.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;<br><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#emptyList--">emptyList</a></span>()</code>
<div class="block">Returns an empty DiffList.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#get-int-">get</a></span>(int&nbsp;index)</code>
<div class="block">Returns the element at the specified position in this list.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<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/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#getMinListForRange-int-int-org.apache.hadoop.hdfs.server.namenode.INodeDirectory-">getMinListForRange</a></span>(int&nbsp;startIndex,
int&nbsp;endIndex,
<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeDirectory</a>&nbsp;dir)</code>
<div class="block">Returns the list of minimal list of elements need to combine to generate
cumulative sum from startIndex to endIndex.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#isEmpty--">isEmpty</a></span>()</code>
<div class="block">Returns true if this list contains no elements.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#remove-int-">remove</a></span>(int&nbsp;index)</code>
<div class="block">Removes the element at the specified position in this list.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#size--">size</a></span>()</code>
<div class="block">Returns the number of elements in this list.</div>
</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>static &lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;<br><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html#unmodifiableList-org.apache.hadoop.hdfs.server.namenode.snapshot.DiffList-">unmodifiableList</a></span>(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;&nbsp;diffs)</code>
<div class="block">Returns an unmodifiable diffList.</div>
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<h3>Methods inherited from interface&nbsp;java.lang.<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></h3>
<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>, <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>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#spliterator--" title="class or interface in java.lang">spliterator</a></code></li>
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<pre>static final&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a> EMPTY_LIST</pre>
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<pre>static&nbsp;&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;&nbsp;emptyList()</pre>
<div class="block">Returns an empty DiffList.</div>
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<a name="unmodifiableList-org.apache.hadoop.hdfs.server.namenode.snapshot.DiffList-">
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<h4>unmodifiableList</h4>
<pre>static&nbsp;&lt;T extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Comparable.html?is-external=true" title="class or interface in java.lang">Comparable</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a>&gt;&gt;&nbsp;<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;&nbsp;unmodifiableList(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="interface in org.apache.hadoop.hdfs.server.namenode.snapshot">DiffList</a>&lt;T&gt;&nbsp;diffs)</pre>
<div class="block">Returns an unmodifiable diffList.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>T</code> - Type of the object in the the diffList</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>diffs</code> - DiffList</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>Unmodifiable diffList</dd>
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<h4>get</h4>
<pre><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;get(int&nbsp;index)</pre>
<div class="block">Returns the element at the specified position in this list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index</code> - index of the element to return</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the element at the specified position in this list</dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/IndexOutOfBoundsException.html?is-external=true" title="class or interface in java.lang">IndexOutOfBoundsException</a></code> - if the index is out of range
(<tt>index &lt; 0 || index &gt;= size()</tt>)</dd>
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<h4>isEmpty</h4>
<pre>boolean&nbsp;isEmpty()</pre>
<div class="block">Returns true if this list contains no elements.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true if this list contains no elements</dd>
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<h4>size</h4>
<pre>int&nbsp;size()</pre>
<div class="block">Returns the number of elements in this list.</div>
<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the number of elements in this list.</dd>
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<h4>remove</h4>
<pre><a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;remove(int&nbsp;index)</pre>
<div class="block">Removes the element at the specified position in this list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>index</code> - the index of the element to be removed</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the element previously at the specified position</dd>
</dl>
</li>
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<a name="addLast-java.lang.Comparable-">
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<h4>addLast</h4>
<pre>boolean&nbsp;addLast(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;t)</pre>
<div class="block">Adds an element at the end of the list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>t</code> - element to be appended to this list</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>true, if insertion is successful</dd>
</dl>
</li>
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<a name="addFirst-java.lang.Comparable-">
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<h4>addFirst</h4>
<pre>void&nbsp;addFirst(<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&nbsp;t)</pre>
<div class="block">Adds an element at the beginning of the list.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>t</code> - element to be added to this list</dd>
</dl>
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<h4>binarySearch</h4>
<pre>int&nbsp;binarySearch(int&nbsp;key)</pre>
<div class="block">Searches the list for the specified object using the binary
search algorithm.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - key to be searched for</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>the index of the search key, if it is contained in the list
otherwise, (-insertion point - 1).</dd>
</dl>
</li>
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<h4>getMinListForRange</h4>
<pre><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/server/namenode/snapshot/DiffList.html" title="type parameter in DiffList">T</a>&gt;&nbsp;getMinListForRange(int&nbsp;startIndex,
int&nbsp;endIndex,
<a href="../../../../../../../org/apache/hadoop/hdfs/server/namenode/INodeDirectory.html" title="class in org.apache.hadoop.hdfs.server.namenode">INodeDirectory</a>&nbsp;dir)</pre>
<div class="block">Returns the list of minimal list of elements need to combine to generate
cumulative sum from startIndex to endIndex.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>startIndex</code> - </dd>
<dd><code>endIndex</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>list of T</dd>
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