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 <div class="subTitle">org.apache.openjpa.lib.util.concurrent</div>
 <h2 title="Class ConcurrentHashMap" class="title">Class ConcurrentHashMap</h2>
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 <li>org.apache.openjpa.lib.util.concurrent.ConcurrentHashMap</li>
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 <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>, <a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html" title="interface in org.apache.openjpa.lib.util.concurrent">ConcurrentMap</a>, <a href="../../../../../../org/apache/openjpa/lib/util/SizedMap.html" title="interface in org.apache.openjpa.lib.util">SizedMap</a></dd>
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 <pre>public class <span class="typeNameLabel">ConcurrentHashMap</span>
 extends <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a>
 implements <a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html" title="interface in org.apache.openjpa.lib.util.concurrent">ConcurrentMap</a>, <a href="../../../../../../org/apache/openjpa/lib/util/SizedMap.html" title="interface in org.apache.openjpa.lib.util">SizedMap</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a></pre>
 <div class="block">This class implements a HashMap which has limited synchronization.
  In particular mutators are generally synchronized while accessors
  are generally not. Additionally the Iterators returned by this
  class are not "fail-fast", but instead try to continue to iterate
  over the data structure after changes have been made.
  The synchronization semantics are built right in to the
  implementation rather than using a delegating wrapper like the
  other collection classes do because it wasn't clear to me that the
  how the two should be seperated or that it would be useful to do
  so. This can probably be a topic for further debate in the future.
  This class is based heavily on the HashMap class in the Java
  collections package.</div>
 <dl>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="../../../../../../serialized-form.html#org.apache.openjpa.lib.util.concurrent.ConcurrentHashMap">Serialized Form</a></dd>
 </dl>
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 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colLast" scope="col">Class and Description</th>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected static class&nbsp;</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.Entry.html" title="class in org.apache.openjpa.lib.util.concurrent">ConcurrentHashMap.Entry</a></span></code>&nbsp;</td>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleEntry.html?is-external=true" title="class or interface in java.util">AbstractMap.SimpleEntry</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleEntry.html?is-external=true" title="class or interface in java.util">K</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleEntry.html?is-external=true" title="class or interface in java.util">V</a>&gt;, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleImmutableEntry.html?is-external=true" title="class or interface in java.util">AbstractMap.SimpleImmutableEntry</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleImmutableEntry.html?is-external=true" title="class or interface in java.util">K</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.SimpleImmutableEntry.html?is-external=true" title="class or interface in java.util">V</a>&gt;</code></li>
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 <th class="colOne" scope="col">Constructor and Description</th>
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 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#ConcurrentHashMap--">ConcurrentHashMap</a></span>()</code>
 <div class="block">Constructs an empty <tt>ConcurrentHashMap</tt> with the default initial
  capacity(16) and the default load factor(0.75).</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#ConcurrentHashMap-int-">ConcurrentHashMap</a></span>(int&nbsp;initialCapacity)</code>
 <div class="block">Constructs an empty <tt>ConcurrentHashMap</tt> with the specified initial
  capacity and the default load factor(0.75).</div>
 </td>
 </tr>
 <tr class="altColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#ConcurrentHashMap-int-float-">ConcurrentHashMap</a></span>(int&nbsp;initialCapacity,
                  float&nbsp;loadFactor)</code>
 <div class="block">Constructs an empty <tt>ConcurrentHashMap</tt> with the specified initial
  capacity and load factor.</div>
 </td>
 </tr>
 <tr class="rowColor">
 <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#ConcurrentHashMap-java.util.Map-">ConcurrentHashMap</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&nbsp;m)</code>
 <div class="block">Constructs a new <tt>ConcurrentHashMap</tt> with the same mappings as the
  specified <tt>Map</tt>.</div>
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 </tr>
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 </li>
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 <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
 <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>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#capacity--">capacity</a></span>()</code>
 <div class="block">Returns the current capacity of backing table in this map.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#clear--">clear</a></span>()</code>
 <div class="block">Removes all mappings from this map.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#clone--">clone</a></span>()</code>
 <div class="block">Returns a shallow copy of this <tt>ConcurrentHashMap</tt> instance: the
  keys and values themselves are not cloned.</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/openjpa/lib/util/concurrent/ConcurrentHashMap.html#containsKey-java.lang.Object-">containsKey</a></span>(<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>&nbsp;key)</code>
 <div class="block">Returns <tt>true</tt> if this map contains a mapping for the
  specified key.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#containsValue-java.lang.Object-">containsValue</a></span>(<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>&nbsp;value)</code>
 <div class="block">Returns <tt>true</tt> if this map maps one or more keys to the
  specified value.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.Entry.html" title="class in org.apache.openjpa.lib.util.concurrent">ConcurrentHashMap.Entry</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#createEntry-int-java.lang.Object-java.lang.Object-org.apache.openjpa.lib.util.concurrent.ConcurrentHashMap.Entry-">createEntry</a></span>(int&nbsp;h,
            <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>&nbsp;k,
            <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>&nbsp;v,
            <a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.Entry.html" title="class in org.apache.openjpa.lib.util.concurrent">ConcurrentHashMap.Entry</a>&nbsp;n)</code>&nbsp;</td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#entrySet--">entrySet</a></span>()</code>
 <div class="block">Returns a collection view of the mappings contained in this map.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#get-java.lang.Object-">get</a></span>(<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>&nbsp;key)</code>
 <div class="block">Returns the value to which the specified key is mapped in this identity
  hash map, or <tt>null</tt> if the map contains no mapping for this key.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>protected <a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.Entry.html" title="class in org.apache.openjpa.lib.util.concurrent">ConcurrentHashMap.Entry</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#getEntry-java.lang.Object-">getEntry</a></span>(<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>&nbsp;key)</code>
 <div class="block">Returns the entry associated with the specified key in the
  ConcurrentHashMap.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#getMaxSize--">getMaxSize</a></span>()</code>
 <div class="block">The maximum number of entries, or Integer.MAX_VALUE for no limit.</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#isEmpty--">isEmpty</a></span>()</code>
 <div class="block">Returns <tt>true</tt> if this map contains no key-value mappings.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#isFull--">isFull</a></span>()</code>
 <div class="block">Whether the map is full.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#keySet--">keySet</a></span>()</code>
 <div class="block">Returns a set view of the keys contained in this map.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code>float</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#loadFactor--">loadFactor</a></span>()</code>
 <div class="block">Returns the load factor for this map.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#overflowRemoved-java.lang.Object-java.lang.Object-">overflowRemoved</a></span>(<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>&nbsp;key,
                <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>&nbsp;value)</code>
 <div class="block">Overridable callback for when an overflow entry is automatically removed.</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#put-java.lang.Object-java.lang.Object-">put</a></span>(<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>&nbsp;key,
    <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>&nbsp;value)</code>
 <div class="block">Associates the specified value with the specified key in this map.</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#putAll-java.util.Map-">putAll</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&nbsp;t)</code>
 <div class="block">Copies all of the mappings from the specified map to this map
  These mappings will replace any mappings that
  this map had for any of the keys currently in the specified map.</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#putIfAbsent-java.lang.Object-java.lang.Object-">putIfAbsent</a></span>(<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>&nbsp;key,
            <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>&nbsp;value)</code>&nbsp;</td>
 </tr>
 <tr id="i18" 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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#randomEntryIterator--">randomEntryIterator</a></span>()</code>
 <div class="block">Iterate over map entries, beginning at an arbitrary
  (not strictly random) entry.</div>
 </td>
 </tr>
 <tr id="i19" class="rowColor">
 <td class="colFirst"><code><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#remove-java.lang.Object-">remove</a></span>(<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>&nbsp;key)</code>
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 <tr id="i20" class="altColor">
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 <tr id="i22" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#size--">size</a></span>()</code>
 <div class="block">Returns the number of key-value mappings in this map.</div>
 </td>
 </tr>
 <tr id="i23" class="rowColor">
 <td class="colFirst"><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></code></td>
 <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.html#values--">values</a></span>()</code>
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 <div class="block">Constructs a new <tt>ConcurrentHashMap</tt> with the same mappings as the
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/openjpa/lib/util/SizedMap.html#overflowRemoved-java.lang.Object-java.lang.Object-">SizedMap</a></code></span></div>
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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 <div class="block">Returns the entry associated with the specified key in the
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 <div class="block">Associates the specified value with the specified key in this map.
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 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
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 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - key with which the specified value is to be associated.</dd>
 <dd><code>value</code> - value to be associated with the specified key.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>previous value associated with specified key, or <tt>null</tt>
  if there was no mapping for key. A <tt>null</tt> return can
  also indicate that the ConcurrentHashMap previously associated
  <tt>null</tt> with the specified key.</dd>
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 <pre>public&nbsp;<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>&nbsp;putIfAbsent(<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>&nbsp;key,
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 <dl>
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 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#putIfAbsent-K-V-" title="class or interface in java.util">putIfAbsent</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
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 <pre>public final&nbsp;void&nbsp;putAll(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a>&nbsp;t)</pre>
 <div class="block">Copies all of the mappings from the specified map to this map
  These mappings will replace any mappings that
  this map had for any of the keys currently in the specified map.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#putAll-java.util.Map-" title="class or interface in java.util">putAll</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#putAll-java.util.Map-" title="class or interface in java.util">putAll</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>t</code> - mappings to be stored in this map.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/NullPointerException.html?is-external=true" title="class or interface in java.lang">NullPointerException</a></code> - if the specified map is null.</dd>
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 <pre>public&nbsp;<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>&nbsp;remove(<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>&nbsp;key)</pre>
 <div class="block">Removes the mapping for this key from this map if present.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#remove-java.lang.Object-" title="class or interface in java.util">remove</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#remove-java.lang.Object-" title="class or interface in java.util">remove</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - key whose mapping is to be removed from the map.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>previous value associated with specified key, or <tt>null</tt>
  if there was no mapping for key. A <tt>null</tt> return can
  also indicate that the map previously associated <tt>null</tt>
  with the specified key.</dd>
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 <pre>public&nbsp;void&nbsp;clear()</pre>
 <div class="block">Removes all mappings from this map.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.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/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#clear--" title="class or interface in java.util">clear</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
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 <pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.Entry.html?is-external=true" title="class or interface in java.util">Map.Entry</a>&nbsp;removeRandom()</pre>
 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html#removeRandom--">ConcurrentMap</a></code></span></div>
 <div class="block">Remove an arbitrary(not strictly random) entry from the map. This
  allows implementation of concurrent caches with size ceilings.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html#removeRandom--">removeRandom</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html" title="interface in org.apache.openjpa.lib.util.concurrent">ConcurrentMap</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the removed entry, or null if map is empty</dd>
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 <div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html#randomEntryIterator--">ConcurrentMap</a></code></span></div>
 <div class="block">Iterate over map entries, beginning at an arbitrary
  (not strictly random) entry.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html#randomEntryIterator--">randomEntryIterator</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentMap.html" title="interface in org.apache.openjpa.lib.util.concurrent">ConcurrentMap</a></code></dd>
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 <pre>public final&nbsp;boolean&nbsp;containsValue(<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>&nbsp;value)</pre>
 <div class="block">Returns <tt>true</tt> if this map maps one or more keys to the
  specified value.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#containsValue-java.lang.Object-" title="class or interface in java.util">containsValue</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#containsValue-java.lang.Object-" title="class or interface in java.util">containsValue</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>value</code> - value whose presence in this map is to be tested.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><tt>true</tt> if this map maps one or more keys to the
  specified value.</dd>
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 <div class="block">Returns a shallow copy of this <tt>ConcurrentHashMap</tt> instance: the
  keys and values themselves are not cloned.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#clone--" title="class or interface in java.util">clone</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <pre>protected&nbsp;<a href="../../../../../../org/apache/openjpa/lib/util/concurrent/ConcurrentHashMap.Entry.html" title="class in org.apache.openjpa.lib.util.concurrent">ConcurrentHashMap.Entry</a>&nbsp;createEntry(int&nbsp;h,
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 <pre>public final&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Set.html?is-external=true" title="class or interface in java.util">Set</a>&nbsp;keySet()</pre>
 <div class="block">Returns a set view of the keys contained in this map. The set is
  backed by the map, so changes to the map are reflected in the set, and
  vice-versa. The set supports element removal, which removes the
  corresponding mapping from this map, via the <tt>Iterator.remove</tt>,
  <tt>Set.remove</tt>, <tt>removeAll</tt>, <tt>retainAll</tt>, and
  <tt>clear</tt> operations. It does not support the <tt>add</tt> or
  <tt>addAll</tt> operations.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#keySet--" title="class or interface in java.util">keySet</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#keySet--" title="class or interface in java.util">keySet</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block">Returns a collection view of the values contained in this map. The
  collection is backed by the map, so changes to the map are reflected in
  the collection, and vice-versa. The collection supports element
  removal, which removes the corresponding mapping from this map, via the
  <tt>Iterator.remove</tt>, <tt>Collection.remove</tt>,
  <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt> operations.
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 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#values--" title="class or interface in java.util">values</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Overrides:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#values--" title="class or interface in java.util">values</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block">Returns a collection view of the mappings contained in this map. Each
  element in the returned collection is a <tt>Map.Entry</tt>. The
  collection is backed by the map, so changes to the map are reflected in
  the collection, and vice-versa. The collection supports element
  removal, which removes the corresponding mapping from the map, via the
  <tt>Iterator.remove</tt>, <tt>Collection.remove</tt>,
  <tt>removeAll</tt>, <tt>retainAll</tt>, and <tt>clear</tt> operations.
  It does not support the <tt>add</tt> or <tt>addAll</tt> operations.</div>
 <dl>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#entrySet--" title="class or interface in java.util">entrySet</a></code>&nbsp;in interface&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util">Map</a></code></dd>
 <dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
 <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#entrySet--" title="class or interface in java.util">entrySet</a></code>&nbsp;in class&nbsp;<code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util">AbstractMap</a></code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a collection view of the mappings contained in this map.</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><code>Map.Entry</code></dd>
 </dl>
 </li>
 </ul>
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