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<div class="subTitle">org.apache.mina.util</div>
<h2 title="Class CopyOnWriteMap" class="title">Class CopyOnWriteMap&lt;K,V&gt;</h2>
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<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.apache.mina.util.CopyOnWriteMap&lt;K,V&gt;</li>
</ul>
</li>
</ul>
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<dt>All Implemented Interfaces:</dt>
<dd>java.lang.Cloneable, java.util.Map&lt;K,V&gt;</dd>
</dl>
<hr>
<br>
<pre>public class <span class="typeNameLabel">CopyOnWriteMap&lt;K,V&gt;</span>
extends java.lang.Object
implements java.util.Map&lt;K,V&gt;, java.lang.Cloneable</pre>
<div class="block">A thread-safe version of <code>Map</code> in which all operations that change the
Map are implemented by making a new copy of the underlying Map.
While the creation of a new Map can be expensive, this class is designed for
cases in which the primary function is to read data from the Map, not to
modify the Map. Therefore the operations that do not cause a change to this
class happen quickly and concurrently.</div>
<dl>
<dt><span class="simpleTagLabel">Version:</span></dt>
<dd>$Rev$, $Date$</dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>The Apache MINA Project (dev@mina.apache.org)</dd>
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<h3>Nested classes/interfaces inherited from interface&nbsp;java.util.Map</h3>
<code>java.util.Map.Entry&lt;K,V&gt;</code></li>
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<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#CopyOnWriteMap--">CopyOnWriteMap</a></span>()</code>
<div class="block">Creates a new instance of CopyOnWriteMap.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#CopyOnWriteMap-int-">CopyOnWriteMap</a></span>(int&nbsp;initialCapacity)</code>
<div class="block">Creates a new instance of CopyOnWriteMap with the specified initial size</div>
</td>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#CopyOnWriteMap-java.util.Map-">CopyOnWriteMap</a></span>(java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&nbsp;data)</code>
<div class="block">Creates a new instance of CopyOnWriteMap in which the
initial data being held by this map is contained in
the supplied map.</div>
</td>
</tr>
</table>
</li>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<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/mina/util/CopyOnWriteMap.html#clear--">clear</a></span>()</code>
<div class="block">Removes all entries in this map.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#clone--">clone</a></span>()</code>&nbsp;</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#containsKey-java.lang.Object-">containsKey</a></span>(java.lang.Object&nbsp;key)</code>
<div class="block">Returns true if this map contains the provided key, otherwise
this method return false.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#containsValue-java.lang.Object-">containsValue</a></span>(java.lang.Object&nbsp;value)</code>
<div class="block">Returns true if this map contains the provided value, otherwise
this method returns false.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>java.util.Set&lt;java.util.Map.Entry&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#entrySet--">entrySet</a></span>()</code>
<div class="block">This method will return a read-only <code>Set</code>.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#get-java.lang.Object-">get</a></span>(java.lang.Object&nbsp;key)</code>
<div class="block">Returns the value associated with the provided key from this
map.</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/mina/util/CopyOnWriteMap.html#isEmpty--">isEmpty</a></span>()</code>
<div class="block">Returns true if this map is empty, otherwise false.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>java.util.Set&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#keySet--">keySet</a></span>()</code>
<div class="block">This method will return a read-only <code>Set</code>.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#put-K-V-">put</a></span>(<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>&nbsp;key,
<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&nbsp;value)</code>
<div class="block">Adds the provided key and value to this map.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#putAll-java.util.Map-">putAll</a></span>(java.util.Map&lt;? extends <a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,? extends <a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&nbsp;newData)</code>
<div class="block">Inserts all the keys and values contained in the
provided map to this map.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#remove-java.lang.Object-">remove</a></span>(java.lang.Object&nbsp;key)</code>
<div class="block">Removed the value and key from this map based on the
provided key.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#size--">size</a></span>()</code>
<div class="block">Returns the number of key/value pairs in this map.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>java.util.Collection&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/mina/util/CopyOnWriteMap.html#values--">values</a></span>()</code>
<div class="block">This method will return a read-only <code>Collection</code>.</div>
</td>
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<h3>Methods inherited from class&nbsp;java.lang.Object</h3>
<code>equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
</ul>
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<h3>Methods inherited from interface&nbsp;java.util.Map</h3>
<code>compute, computeIfAbsent, computeIfPresent, equals, forEach, getOrDefault, hashCode, merge, putIfAbsent, remove, replace, replace, replaceAll</code></li>
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<h4>CopyOnWriteMap</h4>
<pre>public&nbsp;CopyOnWriteMap()</pre>
<div class="block">Creates a new instance of CopyOnWriteMap.</div>
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<h4>CopyOnWriteMap</h4>
<pre>public&nbsp;CopyOnWriteMap(int&nbsp;initialCapacity)</pre>
<div class="block">Creates a new instance of CopyOnWriteMap with the specified initial size</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>initialCapacity</code> - The initial size of the Map.</dd>
</dl>
</li>
</ul>
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<h4>CopyOnWriteMap</h4>
<pre>public&nbsp;CopyOnWriteMap(java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&nbsp;data)</pre>
<div class="block">Creates a new instance of CopyOnWriteMap in which the
initial data being held by this map is contained in
the supplied map.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>data</code> - A Map containing the initial contents to be placed into
this class.</dd>
</dl>
</li>
</ul>
</li>
</ul>
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<h3>Method Detail</h3>
<a name="put-java.lang.Object-java.lang.Object-">
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<h4>put</h4>
<pre>public&nbsp;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&nbsp;put(<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>&nbsp;key,
<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&nbsp;value)</pre>
<div class="block">Adds the provided key and value to this map.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>put</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.put(java.lang.Object, java.lang.Object)</code></dd>
</dl>
</li>
</ul>
<a name="remove-java.lang.Object-">
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<h4>remove</h4>
<pre>public&nbsp;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&nbsp;remove(java.lang.Object&nbsp;key)</pre>
<div class="block">Removed the value and key from this map based on the
provided key.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>remove</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.remove(java.lang.Object)</code></dd>
</dl>
</li>
</ul>
<a name="putAll-java.util.Map-">
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<h4>putAll</h4>
<pre>public&nbsp;void&nbsp;putAll(java.util.Map&lt;? extends <a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,? extends <a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&nbsp;newData)</pre>
<div class="block">Inserts all the keys and values contained in the
provided map to this map.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>putAll</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.putAll(java.util.Map)</code></dd>
</dl>
</li>
</ul>
<a name="clear--">
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<h4>clear</h4>
<pre>public&nbsp;void&nbsp;clear()</pre>
<div class="block">Removes all entries in this map.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>clear</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.clear()</code></dd>
</dl>
</li>
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<h4>size</h4>
<pre>public&nbsp;int&nbsp;size()</pre>
<div class="block">Returns the number of key/value pairs in this map.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>size</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.size()</code></dd>
</dl>
</li>
</ul>
<a name="isEmpty--">
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<h4>isEmpty</h4>
<pre>public&nbsp;boolean&nbsp;isEmpty()</pre>
<div class="block">Returns true if this map is empty, otherwise false.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>isEmpty</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.isEmpty()</code></dd>
</dl>
</li>
</ul>
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<h4>containsKey</h4>
<pre>public&nbsp;boolean&nbsp;containsKey(java.lang.Object&nbsp;key)</pre>
<div class="block">Returns true if this map contains the provided key, otherwise
this method return false.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>containsKey</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.containsKey(java.lang.Object)</code></dd>
</dl>
</li>
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<h4>containsValue</h4>
<pre>public&nbsp;boolean&nbsp;containsValue(java.lang.Object&nbsp;value)</pre>
<div class="block">Returns true if this map contains the provided value, otherwise
this method returns false.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>containsValue</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.containsValue(java.lang.Object)</code></dd>
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<h4>get</h4>
<pre>public&nbsp;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&nbsp;get(java.lang.Object&nbsp;key)</pre>
<div class="block">Returns the value associated with the provided key from this
map.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>get</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><code>Map.get(java.lang.Object)</code></dd>
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<h4>keySet</h4>
<pre>public&nbsp;java.util.Set&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>&gt;&nbsp;keySet()</pre>
<div class="block">This method will return a read-only <code>Set</code>.</div>
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<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>keySet</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
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<h4>values</h4>
<pre>public&nbsp;java.util.Collection&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&nbsp;values()</pre>
<div class="block">This method will return a read-only <code>Collection</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>values</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
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<h4>entrySet</h4>
<pre>public&nbsp;java.util.Set&lt;java.util.Map.Entry&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;&gt;&nbsp;entrySet()</pre>
<div class="block">This method will return a read-only <code>Set</code>.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>entrySet</code>&nbsp;in interface&nbsp;<code>java.util.Map&lt;<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">K</a>,<a href="../../../../org/apache/mina/util/CopyOnWriteMap.html" title="type parameter in CopyOnWriteMap">V</a>&gt;</code></dd>
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<h4>clone</h4>
<pre>public&nbsp;java.lang.Object&nbsp;clone()</pre>
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