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<title>ConditionalExistenceCollections</title>
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<div class="subTitle">org.unitConverter.math</div>
<h2 title="Class ConditionalExistenceCollections" class="title">Class ConditionalExistenceCollections</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>org.unitConverter.math.ConditionalExistenceCollections</li>
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<pre>public final class <span class="typeNameLabel">ConditionalExistenceCollections</span>
extends java.lang.Object</pre>
<div class="block">Elements in these wrapper collections only exist if they pass a condition.
<p>
All of the collections in this class are "views" of the provided collections. They are mutable if the provided
collections are mutable, they allow null if the provided collections allow null, they will reflect changes in the
provided collection, etc.
<p>
The modification operations will always run the corresponding operations, even if the conditional existence
collection doesn't change. For example, if you have a set that ignores even numbers, add(2) will still add a 2 to the
backing set (but the conditional existence set will say it doesn't exist).
<p>
The returned collections do <i>not</i> pass the hashCode and equals operations through to the backing collections,
but rely on <code>Object</code>'s <code>equals</code> and <code>hashCode</code> methods. This is necessary to preserve the contracts
of these operations in the case that the backing collections are sets or lists.
<p>
Other than that, <i>the only difference between the provided collections and the returned collections are that
elements don't exist if they don't pass the provided condition</i>.</div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2019-10-17</dd>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Adrien Hopkins</dd>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/unitConverter/math/ConditionalExistenceCollections.html#ConditionalExistenceCollections--">ConditionalExistenceCollections</a></span>()</code> </td>
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<td class="colFirst"><code>static <E> java.util.Collection<E></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/unitConverter/math/ConditionalExistenceCollections.html#conditionalExistenceCollection-java.util.Collection-java.util.function.Predicate-">conditionalExistenceCollection</a></span>(java.util.Collection<E> collection,
java.util.function.Predicate<E> existenceCondition)</code>
<div class="block">Elements in the returned wrapper collection are ignored if they don't pass a condition.</div>
</td>
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<td class="colFirst"><code>static <E> java.util.Iterator<E></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/unitConverter/math/ConditionalExistenceCollections.html#conditionalExistenceIterator-java.util.Iterator-java.util.function.Predicate-">conditionalExistenceIterator</a></span>(java.util.Iterator<E> iterator,
java.util.function.Predicate<E> existenceCondition)</code>
<div class="block">Elements in the returned wrapper iterator are ignored if they don't pass a condition.</div>
</td>
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<td class="colFirst"><code>static <K,V> java.util.Map<K,V></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/unitConverter/math/ConditionalExistenceCollections.html#conditionalExistenceMap-java.util.Map-java.util.function.Predicate-">conditionalExistenceMap</a></span>(java.util.Map<K,V> map,
java.util.function.Predicate<java.util.Map.Entry<K,V>> entryExistenceCondition)</code>
<div class="block">Mappings in the returned wrapper map are ignored if the corresponding entry doesn't pass a condition</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static <E> java.util.Set<E></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/unitConverter/math/ConditionalExistenceCollections.html#conditionalExistenceSet-java.util.Set-java.util.function.Predicate-">conditionalExistenceSet</a></span>(java.util.Set<E> set,
java.util.function.Predicate<E> existenceCondition)</code>
<div class="block">Elements in the returned wrapper set are ignored if they don't pass a condition.</div>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>
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<h4>ConditionalExistenceCollections</h4>
<pre>public ConditionalExistenceCollections()</pre>
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<h4>conditionalExistenceCollection</h4>
<pre>public static final <E> java.util.Collection<E> conditionalExistenceCollection(java.util.Collection<E> collection,
java.util.function.Predicate<E> existenceCondition)</pre>
<div class="block">Elements in the returned wrapper collection are ignored if they don't pass a condition.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>E</code> - type of elements in collection</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>collection</code> - collection to wrap</dd>
<dd><code>existenceCondition</code> - elements only exist if this returns true</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>wrapper collection</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2019-10-17</dd>
</dl>
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<h4>conditionalExistenceIterator</h4>
<pre>public static final <E> java.util.Iterator<E> conditionalExistenceIterator(java.util.Iterator<E> iterator,
java.util.function.Predicate<E> existenceCondition)</pre>
<div class="block">Elements in the returned wrapper iterator are ignored if they don't pass a condition.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>E</code> - type of elements in iterator</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>iterator</code> - iterator to wrap</dd>
<dd><code>existenceCondition</code> - elements only exist if this returns true</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>wrapper iterator</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2019-10-17</dd>
</dl>
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<h4>conditionalExistenceMap</h4>
<pre>public static final <K,V> java.util.Map<K,V> conditionalExistenceMap(java.util.Map<K,V> map,
java.util.function.Predicate<java.util.Map.Entry<K,V>> entryExistenceCondition)</pre>
<div class="block">Mappings in the returned wrapper map are ignored if the corresponding entry doesn't pass a condition</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>K</code> - type of key in map</dd>
<dd><code>V</code> - type of value in map</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>map</code> - map to wrap</dd>
<dd><code>entryExistenceCondition</code> - mappings only exist if this returns true</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>wrapper map</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2019-10-17</dd>
</dl>
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<h4>conditionalExistenceSet</h4>
<pre>public static final <E> java.util.Set<E> conditionalExistenceSet(java.util.Set<E> set,
java.util.function.Predicate<E> existenceCondition)</pre>
<div class="block">Elements in the returned wrapper set are ignored if they don't pass a condition.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>E</code> - type of elements in set</dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>set</code> - set to wrap</dd>
<dd><code>existenceCondition</code> - elements only exist if this returns true</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>wrapper set</dd>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>2019-10-17</dd>
</dl>
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