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<div class="subTitle">org.janusgraph.diskstorage</div>
<h2 title="Class Mutation" class="title">Class Mutation&lt;E,K&gt;</h2>
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<li>org.janusgraph.diskstorage.Mutation&lt;E,K&gt;</li>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../org/janusgraph/diskstorage/indexing/IndexMutation.html" title="class in org.janusgraph.diskstorage.indexing">IndexMutation</a>, <a href="../../../org/janusgraph/diskstorage/keycolumnvalue/cache/KCVEntryMutation.html" title="class in org.janusgraph.diskstorage.keycolumnvalue.cache">KCVEntryMutation</a>, <a href="../../../org/janusgraph/diskstorage/keycolumnvalue/KCVMutation.html" title="class in org.janusgraph.diskstorage.keycolumnvalue">KCVMutation</a>, <a href="../../../org/janusgraph/diskstorage/keycolumnvalue/keyvalue/KVMutation.html" title="class in org.janusgraph.diskstorage.keycolumnvalue.keyvalue">KVMutation</a></dd>
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<pre>public abstract class <span class="typeNameLabel">Mutation&lt;E,K&gt;</span>
extends <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></pre>
<div class="block">Container for collection mutations against a data store.
Mutations are either additions or deletions.</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Matthias Broecheler (me@matthiasb.com)</dd>
</dl>
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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/janusgraph/diskstorage/Mutation.html#Mutation--">Mutation</a></span>()</code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#Mutation-java.util.List-java.util.List-">Mutation</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;&nbsp;additions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&nbsp;deletions)</code>&nbsp;</td>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#Mutation-java.util.function.Supplier-java.util.function.Supplier-">Mutation</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;&gt;&nbsp;additionsCopySupplier,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&gt;&nbsp;deletionsCopySupplier)</code>&nbsp;</td>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#addition-E-">addition</a></span>(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&nbsp;entry)</code>
<div class="block">Adds a new entry as an addition to this mutation</div>
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<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#consolidate--">consolidate</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>&lt;V&gt;&nbsp;void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#consolidate-java.util.function.Function-java.util.function.Function-">consolidate</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,V&gt;&nbsp;convertAdditions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>,V&gt;&nbsp;convertDeletions)</code>
<div class="block">Consolidates this mutation by removing redundant deletions.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#deletion-K-">deletion</a></span>(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&nbsp;key)</code>
<div class="block">Adds a new key as a deletion to this mutation</div>
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<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#getAdditions--">getAdditions</a></span>()</code>
<div class="block">Returns the list of additions in this mutation</div>
</td>
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<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#getDeletions--">getDeletions</a></span>()</code>
<div class="block">Returns the list of deletions in this mutation.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#getTotalMutations--">getTotalMutations</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#hasAdditions--">hasAdditions</a></span>()</code>
<div class="block">Whether this mutation has additions</div>
</td>
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<tr id="i8" class="altColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#hasDeletions--">hasDeletions</a></span>()</code>
<div class="block">Whether this mutation has deletions</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>abstract boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#isConsolidated--">isConsolidated</a></span>()</code>&nbsp;</td>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>&lt;V&gt;&nbsp;boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#isConsolidated-java.util.function.Function-java.util.function.Function-">isConsolidated</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,V&gt;&nbsp;convertAdditions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>,V&gt;&nbsp;convertDeletions)</code>
<div class="block">Checks whether this mutation is consolidated in the sense of <a href="../../../org/janusgraph/diskstorage/Mutation.html#consolidate-java.util.function.Function-java.util.function.Function-"><code>consolidate(Function, Function)</code></a>.</div>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#isEmpty--">isEmpty</a></span>()</code>&nbsp;</td>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/janusgraph/diskstorage/Mutation.html#merge-org.janusgraph.diskstorage.Mutation-">merge</a></span>(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="class in org.janusgraph.diskstorage">Mutation</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&nbsp;m)</code>
<div class="block">Merges another mutation into this mutation.</div>
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<h3>Methods inherited from class&nbsp;java.lang.<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></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <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">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">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</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">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">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</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">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">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">wait</a></code></li>
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<h4>Mutation</h4>
<pre>public&nbsp;Mutation(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;&nbsp;additions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&nbsp;deletions)</pre>
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<h4>Mutation</h4>
<pre>public&nbsp;Mutation(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;&gt;&nbsp;additionsCopySupplier,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Supplier.html?is-external=true" title="class or interface in java.util.function">Supplier</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&gt;&nbsp;deletionsCopySupplier)</pre>
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<pre>public&nbsp;Mutation()</pre>
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<pre>public&nbsp;boolean&nbsp;hasAdditions()</pre>
<div class="block">Whether this mutation has additions</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<pre>public&nbsp;boolean&nbsp;hasDeletions()</pre>
<div class="block">Whether this mutation has deletions</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<h4>getAdditions</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&gt;&nbsp;getAdditions()</pre>
<div class="block">Returns the list of additions in this mutation</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<h4>getDeletions</h4>
<pre>public&nbsp;<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&nbsp;getDeletions()</pre>
<div class="block">Returns the list of deletions in this mutation.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
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<h4>addition</h4>
<pre>public&nbsp;void&nbsp;addition(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>&nbsp;entry)</pre>
<div class="block">Adds a new entry as an addition to this mutation</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>entry</code> - </dd>
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<pre>public&nbsp;void&nbsp;deletion(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&nbsp;key)</pre>
<div class="block">Adds a new key as a deletion to this mutation</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>key</code> - </dd>
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<h4>merge</h4>
<pre>public&nbsp;void&nbsp;merge(<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="class in org.janusgraph.diskstorage">Mutation</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>&gt;&nbsp;m)</pre>
<div class="block">Merges another mutation into this mutation. Ensures that all additions and deletions
are added to this mutation. Does not remove duplicates if such exist - this needs to be ensured by the caller.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>m</code> - </dd>
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<pre>public&nbsp;boolean&nbsp;isEmpty()</pre>
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<pre>public&nbsp;int&nbsp;getTotalMutations()</pre>
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<h4>consolidate</h4>
<pre>public&nbsp;&lt;V&gt;&nbsp;void&nbsp;consolidate(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,V&gt;&nbsp;convertAdditions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>,V&gt;&nbsp;convertDeletions)</pre>
<div class="block">Consolidates this mutation by removing redundant deletions. A deletion is considered redundant if
it is identical to some addition under the provided conversion functions since we consider additions to apply logically after deletions.
Hence, such a deletion would be applied and immediately overwritten by an addition. To avoid this
inefficiency, consolidation should be called.
<p>
The provided conversion functions map additions and deletions into some object space V for comparison.
An addition is considered identical to a deletion if both map to the same object (i.e. equals=true) with the respective
conversion functions.
<p>
It needs to be ensured that V objects have valid hashCode() and equals() implementations.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>convertAdditions</code> - Function which maps additions onto comparison objects.</dd>
<dd><code>convertDeletions</code> - Function which maps deletions onto comparison objects.</dd>
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<pre>public abstract&nbsp;void&nbsp;consolidate()</pre>
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<pre>public&nbsp;&lt;V&gt;&nbsp;boolean&nbsp;isConsolidated(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">E</a>,V&gt;&nbsp;convertAdditions,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/Function.html?is-external=true" title="class or interface in java.util.function">Function</a>&lt;<a href="../../../org/janusgraph/diskstorage/Mutation.html" title="type parameter in Mutation">K</a>,V&gt;&nbsp;convertDeletions)</pre>
<div class="block">Checks whether this mutation is consolidated in the sense of <a href="../../../org/janusgraph/diskstorage/Mutation.html#consolidate-java.util.function.Function-java.util.function.Function-"><code>consolidate(Function, Function)</code></a>.
This should only be used in assertions and tests due to the performance penalty.</div>
<dl>
<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>V</code> - </dd>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>convertAdditions</code> - </dd>
<dd><code>convertDeletions</code> - </dd>
<dt><span class="returnLabel">Returns:</span></dt>
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<pre>public abstract&nbsp;boolean&nbsp;isConsolidated()</pre>
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