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 <div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.util.collection</a></div>
 <h2 title="Class WeakValueHashMap" class="title">Class WeakValueHashMap&lt;K,&#8203;V&gt;</h2>
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 <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></li>
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 <ul class="inheritance">
 <li><a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util" class="externalLink">AbstractMap</a>&lt;K,&#8203;V&gt;</li>
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 <dt><span class="paramLabel">Type Parameters:</span></dt>
 <dd><code>K</code> - the class of key elements.</dd>
 <dd><code>V</code> - the class of value elements.</dd>
 </dl>
 <dl>
 <dt>All Implemented Interfaces:</dt>
 <dd><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" class="externalLink">Map</a>&lt;K,&#8203;V&gt;</code></dd>
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 <pre>public class <span class="typeNameLabel">WeakValueHashMap&lt;K,&#8203;V&gt;</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" class="externalLink">AbstractMap</a>&lt;K,&#8203;V&gt;</pre>
 <div class="block">A hashtable-based map implementation that uses <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ref/WeakReference.html?is-external=true" title="class or interface in java.lang.ref" class="externalLink">weak references</a>,
  leaving memory when an entry is not used anymore. An entry in a <code>WeakValueHashMap</code>
  will automatically be removed when its value is no longer in ordinary use. This class is
  similar to the standard <a href="https://docs.oracle.com/javase/8/docs/api/java/util/WeakHashMap.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>WeakHashMap</code></a> class, except that weak references
  apply to values rather than keys.

  <p>Note that this class is <strong>not</strong> a cache, because the entries are discarded
  as soon as the garbage collector determines that they are no longer in use. If caching
  service are wanted, or if concurrency are wanted, consider using <a href="Cache.html" title="class in org.apache.sis.util.collection"><code>Cache</code></a> instead.</p>

  <p>This class is convenient for avoiding the creation of duplicated elements, as in the
  example below:</p>

  <blockquote><pre>K key = ...
 V value;
 <font color="green">synchronized</font> (map) {
     value = map.<b>get</b>(key);
     <font color="green">if</font> (value == <font color="green">null</font>) {
         value = ...; <i><font color="gray">// Create the value here.</font></i>
         map.<b>put</b>(key, value);
     }
 }</pre></blockquote>

  In the above example, the calculation of a new value needs to be fast because it is performed inside a synchronized
  statement blocking all other access to the map. This is okay if that particular <code>WeakValueHashMap</code> instance
  is not expected to be used in a highly concurrent environment.

  <p><code>WeakValueHashMap</code> works with array keys as one would expect. For example arrays of <code>int[]</code> are
  compared using the <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html?is-external=true#equals(int%5B%5D,int%5B%5D)" title="class or interface in java.util" class="externalLink"><code>Arrays.equals(int[], int[])</code></a> method.</p>

  <div class="section">Thread safety</div>
  The same <code>WeakValueHashMap</code> instance can be safely used by many threads without synchronization on the part
  of the caller. But if a sequence of two or more method calls need to appear atomic from other threads perspective,
  then the caller can synchronize on <code>this</code>.</div>
 <dl>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.3</dd>
 <dt><span class="seeLabel">See Also:</span></dt>
 <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/util/WeakHashMap.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>WeakHashMap</code></a>,
 <a href="WeakHashSet.html" title="class in org.apache.sis.util.collection"><code>WeakHashSet</code></a>,
 <a href="Cache.html" title="class in org.apache.sis.util.collection"><code>Cache</code></a></dd>

 <p><font size="-1">Defined in the <code>sis-utility</code> module</font></p>
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 <th class="colFirst" scope="col">Constructor</th>
 <th class="colLast" scope="col">Description</th>
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 <tr class="altColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class)">WeakValueHashMap</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&gt;&nbsp;keyType)</code></th>
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 <div class="block">Creates a new <code>WeakValueHashMap</code>.</div>
 </td>
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 <tr class="rowColor">
 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.lang.Class,boolean)">WeakValueHashMap</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&gt;&nbsp;keyType,
                 boolean&nbsp;identity)</code></th>
 <td class="colLast">
 <div class="block">Creates a new <code>WeakValueHashMap</code>, optionally using reference-equality in place of object-equality.</div>
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 <tr>
 <th class="colFirst" scope="col">Modifier and Type</th>
 <th class="colSecond" scope="col">Method</th>
 <th class="colLast" scope="col">Description</th>
 </tr>
 <tr id="i0" class="altColor">
 <td class="colFirst"><code>void</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#clear()">clear</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Removes all of the elements from this map.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#containsKey(java.lang.Object)">containsKey</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;key)</code></th>
 <td class="colLast">
 <div class="block">Returns <code>true</code> if this map contains a mapping for the specified key.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#containsValue(java.lang.Object)">containsValue</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;value)</code></th>
 <td class="colLast">
 <div class="block">Returns <code>true</code> if this map maps one or more keys to this value.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <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" class="externalLink">Set</a>&lt;<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" class="externalLink">Map.Entry</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;&gt;</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#entrySet()">entrySet</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns a set view of the mappings contained in this map.</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#get(java.lang.Object)">get</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;key)</code></th>
 <td class="colLast">
 <div class="block">Returns the value to which this map maps the specified key.</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#put(K,V)">put</a></span>&#8203;(<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&nbsp;key,
    <a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;value)</code></th>
 <td class="colLast">
 <div class="block">Associates the specified value with the specified key in this map.</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#putIfAbsent(K,V)">putIfAbsent</a></span>&#8203;(<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&nbsp;key,
            <a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;value)</code></th>
 <td class="colLast">
 <div class="block">Associates the specified value with the specified key in this map if no value were previously associated.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#remove(java.lang.Object)">remove</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;key)</code></th>
 <td class="colLast">
 <div class="block">Removes the mapping for this key from this map if present.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code>int</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#size()">size</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Returns the number of key-value mappings in this map.</div>
 </td>
 </tr>
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 <h3>Methods inherited from class&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true" title="class or interface in java.util" class="externalLink">AbstractMap</a></h3>
 <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" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.util" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#hashCode()" title="class or interface in java.util" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#isEmpty()" title="class or interface in java.util" class="externalLink">isEmpty</a>, <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" class="externalLink">keySet</a>, <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" class="externalLink">putAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/AbstractMap.html?is-external=true#toString()" title="class or interface in java.util" class="externalLink">toString</a>, <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" class="externalLink">values</a></code></li>
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 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></li>
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 <h3>Methods inherited from interface&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="class or interface in java.util" class="externalLink">Map</a></h3>
 <code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#compute(K,java.util.function.BiFunction)" title="class or interface in java.util" class="externalLink">compute</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#computeIfAbsent(K,java.util.function.Function)" title="class or interface in java.util" class="externalLink">computeIfAbsent</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#computeIfPresent(K,java.util.function.BiFunction)" title="class or interface in java.util" class="externalLink">computeIfPresent</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#forEach(java.util.function.BiConsumer)" title="class or interface in java.util" class="externalLink">forEach</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#getOrDefault(java.lang.Object,V)" title="class or interface in java.util" class="externalLink">getOrDefault</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#merge(K,V,java.util.function.BiFunction)" title="class or interface in java.util" class="externalLink">merge</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#remove(java.lang.Object,java.lang.Object)" title="class or interface in java.util" class="externalLink">remove</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#replace(K,V)" title="class or interface in java.util" class="externalLink">replace</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#replace(K,V,V)" title="class or interface in java.util" class="externalLink">replace</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true#replaceAll(java.util.function.BiFunction)" title="class or interface in java.util" class="externalLink">replaceAll</a></code></li>
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 <h4>WeakValueHashMap</h4>
 <pre>public&nbsp;WeakValueHashMap&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&gt;&nbsp;keyType)</pre>
 <div class="block">Creates a new <code>WeakValueHashMap</code>.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keyType</code> - the type of keys in the map.</dd>
 </dl>
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 <pre>public&nbsp;WeakValueHashMap&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&gt;&nbsp;keyType,
                         boolean&nbsp;identity)</pre>
 <div class="block">Creates a new <code>WeakValueHashMap</code>, optionally using reference-equality in place of object-equality.
  If <code>identity</code> is <code>true</code>, then two keys <code>k1</code> and <code>k2</code> are considered equal if and
  only if <code>(k1 == k2)</code> instead than if <code>k1.equals(k2)</code>.

  <p>Reference-equality semantic is rarely used. See the <a href="https://docs.oracle.com/javase/8/docs/api/java/util/IdentityHashMap.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>IdentityHashMap</code></a> class javadoc
  for a discussion about drawbacks and use cases when reference-equality semantic is useful.</p></div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>keyType</code> - the type of keys in the map.</dd>
 <dd><code>identity</code> - <code>true</code> if the map shall use reference-equality in place of object-equality
                    when comparing keys, or <code>false</code> for the standard behavior.</dd>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.4</dd>
 </dl>
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 <pre class="methodSignature">public&nbsp;int&nbsp;size()</pre>
 <div class="block">Returns the number of key-value mappings in 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#size()" title="class or interface in java.util" class="externalLink">size</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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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#size()" title="class or interface in java.util" class="externalLink">size</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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the number of entries in this map.</dd>
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 <pre class="methodSignature">public&nbsp;boolean&nbsp;containsKey&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;key)</pre>
 <div class="block">Returns <code>true</code> if this map contains a mapping for the specified key.
  Null keys are considered never 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#containsKey(java.lang.Object)" title="class or interface in java.util" class="externalLink">containsKey</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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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#containsKey(java.lang.Object)" title="class or interface in java.util" class="externalLink">containsKey</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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - key whose presence in this map is to be tested.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd><code>true</code> if this map contains a mapping for the specified key.</dd>
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 <pre class="methodSignature">public&nbsp;boolean&nbsp;containsValue&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;value)</pre>
 <div class="block">Returns <code>true</code> if this map maps one or more keys to this value.
  Null values are considered never 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#containsValue(java.lang.Object)" title="class or interface in java.util" class="externalLink">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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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" class="externalLink">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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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><code>true</code> if this map maps one or more keys to this value.</dd>
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 <pre class="methodSignature">public&nbsp;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;get&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;key)</pre>
 <div class="block">Returns the value to which this map maps the specified key.
  Returns <code>null</code> if the map contains no mapping for this key.
  Null keys are considered never 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#get(java.lang.Object)" title="class or interface in java.util" class="externalLink">get</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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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#get(java.lang.Object)" title="class or interface in java.util" class="externalLink">get</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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>key</code> - key whose associated value is to be returned.</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the value to which this map maps the specified key.</dd>
 </dl>
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 <pre class="methodSignature">public&nbsp;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;put&#8203;(<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&nbsp;key,
              <a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;value)
       throws <a href="../NullArgumentException.html" title="class in org.apache.sis.util">NullArgumentException</a></pre>
 <div class="block">Associates the specified value with the specified key in this map.
  The value is associated using a <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ref/WeakReference.html?is-external=true" title="class or interface in java.lang.ref" class="externalLink"><code>WeakReference</code></a>.</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#put(K,V)" title="class or interface in java.util" class="externalLink">put</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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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#put(K,V)" title="class or interface in java.util" class="externalLink">put</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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
 <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>the previous value associated with specified key, or <code>null</code> if there was no mapping for key.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../NullArgumentException.html" title="class in org.apache.sis.util">NullArgumentException</a></code> - if the key or the value is <code>null</code>.</dd>
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 <pre class="methodSignature">public&nbsp;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;putIfAbsent&#8203;(<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>&nbsp;key,
                      <a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;value)
               throws <a href="../NullArgumentException.html" title="class in org.apache.sis.util">NullArgumentException</a></pre>
 <div class="block">Associates the specified value with the specified key in this map if no value were previously associated.
  If an other value is already associated to the given key, then the map is left unchanged and the current
  value is returned. Otherwise the specified value is associated to the key using a <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/ref/WeakReference.html?is-external=true" title="class or interface in java.lang.ref" class="externalLink"><code>WeakReference</code></a>
  and <code>null</code> is returned.</div>
 <dl>
 <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>the current value associated with specified key, or <code>null</code> if there was no mapping for key.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../NullArgumentException.html" title="class in org.apache.sis.util">NullArgumentException</a></code> - if the key or the value is <code>null</code>.</dd>
 <dt><span class="simpleTagLabel">Since:</span></dt>
 <dd>0.7</dd>
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 <pre class="methodSignature">public&nbsp;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&nbsp;remove&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">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" class="externalLink">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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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" class="externalLink">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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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 <code>null</code> if there was no entry for key.</dd>
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 <pre class="methodSignature">public&nbsp;void&nbsp;clear()</pre>
 <div class="block">Removes all of the elements 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" class="externalLink">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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</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" class="externalLink">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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
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 <pre class="methodSignature">public&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" class="externalLink">Set</a>&lt;<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" class="externalLink">Map.Entry</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;&gt;&nbsp;entrySet()</pre>
 <div class="block">Returns a set view of the mappings contained in this map.
  Each element in this set is a <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" class="externalLink"><code>Map.Entry</code></a>.</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" class="externalLink">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" class="externalLink">Map</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</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/AbstractMap.html?is-external=true#entrySet()" title="class or interface in java.util" class="externalLink">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" class="externalLink">AbstractMap</a>&lt;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">K</a>,&#8203;<a href="WeakValueHashMap.html" title="type parameter in WeakValueHashMap">V</a>&gt;</code></dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>a set view of the mappings contained in this map.</dd>
 </dl>
 </li>
 </ul>
 </li>
 </ul>
 </section>
 </li>
 </ul>
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