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| <li>Summary: </li> |
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| <div class="sub-title"><span class="module-label-in-type">Module</span> <a href="../../../../module-summary.html">org.apache.jena.core</a></div> |
| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.jena.mem2</a></div> |
| <h1 title="Class GraphMem2Fast" class="title">Class GraphMem2Fast</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance"><a href="../graph/impl/GraphBase.html" title="class in org.apache.jena.graph.impl">org.apache.jena.graph.impl.GraphBase</a> |
| <div class="inheritance"><a href="../mem/GraphMemBase.html" title="class in org.apache.jena.mem">org.apache.jena.mem.GraphMemBase</a> |
| <div class="inheritance"><a href="GraphMem2.html" title="class in org.apache.jena.mem2">org.apache.jena.mem2.GraphMem2</a> |
| <div class="inheritance">org.apache.jena.mem2.GraphMem2Fast</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code>org.apache.jena.atlas.lib.Copyable<<a href="GraphMem2.html" title="class in org.apache.jena.mem2">GraphMem2</a>></code>, <code><a href="../graph/Graph.html" title="interface in org.apache.jena.graph">Graph</a></code>, <code><a href="../graph/impl/GraphWithPerform.html" title="interface in org.apache.jena.graph.impl">GraphWithPerform</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">GraphMem2Fast</span> |
| <span class="extends-implements">extends <a href="GraphMem2.html" title="class in org.apache.jena.mem2">GraphMem2</a></span></div> |
| <div class="block">A graph that stores triples in memory. This class is not thread-safe. |
| <p> |
| Purpose: GraphMem2Fast is a strong candidate for becoming the new default in-memory graph in the upcoming Jena 5, |
| thanks to its improved performance and relatively minor increase in memory usage. |
| <p> |
| Faster than <a href="GraphMem2Legacy.html" title="class in org.apache.jena.mem2"><code>GraphMem2Legacy</code></a> (specially Graph#add, Graph#find and Graph#stream) |
| Removing triples is a bit slower than <a href="GraphMem2Legacy.html" title="class in org.apache.jena.mem2"><code>GraphMem2Legacy</code></a>. |
| Memory consumption is about 6-35% higher than <a href="GraphMem2Legacy.html" title="class in org.apache.jena.mem2"><code>GraphMem2Legacy</code></a> |
| Maps and sets are based on <a href="collection/FastHashBase.html" title="class in org.apache.jena.mem2.collection"><code>FastHashBase</code></a> |
| Benefits from multiple small optimizations. (see: <a href="store/fast/FastTripleStore.html" title="class in org.apache.jena.mem2.store.fast"><code>FastTripleStore</code></a>) |
| <p> |
| The heritage of GraphMem: |
| - Also uses 3 hash-maps indexed by subjects, predicates, and objects |
| - Values of the maps also switch from arrays to hash sets for the triples</div> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <li> |
| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="inherited-list"> |
| <h3 id="fields-inherited-from-class-org.apache.jena.graph.impl.GraphBase">Fields inherited from class org.apache.jena.graph.impl.<a href="../graph/impl/GraphBase.html" title="class in org.apache.jena.graph.impl">GraphBase</a></h3> |
| <code><a href="../graph/impl/GraphBase.html#TOSTRING_TRIPLE_BASE">TOSTRING_TRIPLE_BASE</a>, <a href="../graph/impl/GraphBase.html#TOSTRING_TRIPLE_LIMIT">TOSTRING_TRIPLE_LIMIT</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="fields-inherited-from-class-org.apache.jena.graph.Graph">Fields inherited from interface org.apache.jena.graph.<a href="../graph/Graph.html" title="interface in org.apache.jena.graph">Graph</a></h3> |
| <code><a href="../graph/Graph.html#emptyGraph">emptyGraph</a></code></div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">GraphMem2Fast</a>()</code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
| <div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div> |
| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="GraphMem2Fast.html" title="class in org.apache.jena.mem2">GraphMem2Fast</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#copy()" class="member-name-link">copy</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Creates a copy of this graph.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.mem2.GraphMem2">Methods inherited from class org.apache.jena.mem2.<a href="GraphMem2.html" title="class in org.apache.jena.mem2">GraphMem2</a></h3> |
| <code><a href="GraphMem2.html#clear()">clear</a>, <a href="GraphMem2.html#destroy()">destroy</a>, <a href="GraphMem2.html#getCapabilities()">getCapabilities</a>, <a href="GraphMem2.html#graphBaseContains(org.apache.jena.graph.Triple)">graphBaseContains</a>, <a href="GraphMem2.html#graphBaseFind(org.apache.jena.graph.Triple)">graphBaseFind</a>, <a href="GraphMem2.html#graphBaseSize()">graphBaseSize</a>, <a href="GraphMem2.html#performAdd(org.apache.jena.graph.Triple)">performAdd</a>, <a href="GraphMem2.html#performDelete(org.apache.jena.graph.Triple)">performDelete</a>, <a href="GraphMem2.html#stream()">stream</a>, <a href="GraphMem2.html#stream(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">stream</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.mem.GraphMemBase">Methods inherited from class org.apache.jena.mem.<a href="../mem/GraphMemBase.html" title="class in org.apache.jena.mem">GraphMemBase</a></h3> |
| <code><a href="../mem/GraphMemBase.html#close()">close</a>, <a href="../mem/GraphMemBase.html#openAgain()">openAgain</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.graph.impl.GraphBase">Methods inherited from class org.apache.jena.graph.impl.<a href="../graph/impl/GraphBase.html" title="class in org.apache.jena.graph.impl">GraphBase</a></h3> |
| <code><a href="../graph/impl/GraphBase.html#add(org.apache.jena.graph.Triple)">add</a>, <a href="../graph/impl/GraphBase.html#contains(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">contains</a>, <a href="../graph/impl/GraphBase.html#contains(org.apache.jena.graph.Triple)">contains</a>, <a href="../graph/impl/GraphBase.html#delete(org.apache.jena.graph.Triple)">delete</a>, <a href="../graph/impl/GraphBase.html#dependsOn(org.apache.jena.graph.Graph)">dependsOn</a>, <a href="../graph/impl/GraphBase.html#find(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">find</a>, <a href="../graph/impl/GraphBase.html#find(org.apache.jena.graph.Triple)">find</a>, <a href="../graph/impl/GraphBase.html#forTestingOnly_graphBaseFind(org.apache.jena.graph.Triple)">forTestingOnly_graphBaseFind</a>, <a href="../graph/impl/GraphBase.html#getEventManager()">getEventManager</a>, <a href="../graph/impl/GraphBase.html#getPrefixMapping()">getPrefixMapping</a>, <a href="../graph/impl/GraphBase.html#getTransactionHandler()">getTransactionHandler</a>, <a href="../graph/impl/GraphBase.html#isClosed()">isClosed</a>, <a href="../graph/impl/GraphBase.html#isEmpty()">isEmpty</a>, <a href="../graph/impl/GraphBase.html#isIsomorphicWith(org.apache.jena.graph.Graph)">isIsomorphicWith</a>, <a href="../graph/impl/GraphBase.html#notifyAdd(org.apache.jena.graph.Triple)">notifyAdd</a>, <a href="../graph/impl/GraphBase.html#notifyDelete(org.apache.jena.graph.Triple)">notifyDelete</a>, <a href="../graph/impl/GraphBase.html#remove(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">remove</a>, <a href="../graph/impl/GraphBase.html#size()">size</a>, <a href="../graph/impl/GraphBase.html#toString()">toString</a>, <a href="../graph/impl/GraphBase.html#toString(java.lang.String,org.apache.jena.graph.Graph)">toString</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-org.apache.jena.graph.Graph">Methods inherited from interface org.apache.jena.graph.<a href="../graph/Graph.html" title="interface in org.apache.jena.graph">Graph</a></h3> |
| <code><a href="../graph/Graph.html#add(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">add</a>, <a href="../graph/Graph.html#add(org.apache.jena.graph.Triple)">add</a>, <a href="../graph/Graph.html#close()">close</a>, <a href="../graph/Graph.html#contains(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">contains</a>, <a href="../graph/Graph.html#contains(org.apache.jena.graph.Triple)">contains</a>, <a href="../graph/Graph.html#delete(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">delete</a>, <a href="../graph/Graph.html#delete(org.apache.jena.graph.Triple)">delete</a>, <a href="../graph/Graph.html#dependsOn(org.apache.jena.graph.Graph)">dependsOn</a>, <a href="../graph/Graph.html#find()">find</a>, <a href="../graph/Graph.html#find(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">find</a>, <a href="../graph/Graph.html#find(org.apache.jena.graph.Triple)">find</a>, <a href="../graph/Graph.html#getEventManager()">getEventManager</a>, <a href="../graph/Graph.html#getPrefixMapping()">getPrefixMapping</a>, <a href="../graph/Graph.html#getTransactionHandler()">getTransactionHandler</a>, <a href="../graph/Graph.html#isClosed()">isClosed</a>, <a href="../graph/Graph.html#isEmpty()">isEmpty</a>, <a href="../graph/Graph.html#isIsomorphicWith(org.apache.jena.graph.Graph)">isIsomorphicWith</a>, <a href="../graph/Graph.html#remove(org.apache.jena.graph.Node,org.apache.jena.graph.Node,org.apache.jena.graph.Node)">remove</a>, <a href="../graph/Graph.html#size()">size</a>, <a href="../graph/Graph.html#sizeLong()">sizeLong</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>()"> |
| <h3>GraphMem2Fast</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">GraphMem2Fast</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="copy()"> |
| <h3>copy</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="GraphMem2Fast.html" title="class in org.apache.jena.mem2">GraphMem2Fast</a></span> <span class="element-name">copy</span>()</div> |
| <div class="block"><span class="descfrm-type-label">Description copied from class: <code><a href="GraphMem2.html#copy()">GraphMem2</a></code></span></div> |
| <div class="block">Creates a copy of this graph. |
| Since the triples and nodes are immutable, the copy contains the same triples and nodes as this graph. |
| Modifications to the copy will not affect this graph.</div> |
| <dl class="notes"> |
| <dt>Specified by:</dt> |
| <dd><code>copy</code> in interface <code>org.apache.jena.atlas.lib.Copyable<<a href="GraphMem2.html" title="class in org.apache.jena.mem2">GraphMem2</a>></code></dd> |
| <dt>Overrides:</dt> |
| <dd><code><a href="GraphMem2.html#copy()">copy</a></code> in class <code><a href="GraphMem2.html" title="class in org.apache.jena.mem2">GraphMem2</a></code></dd> |
| <dt>Returns:</dt> |
| <dd>independent copy of the current graph</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <!-- ========= END OF CLASS DATA ========= --> |
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| <footer role="contentinfo"> |
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| <p class="legal-copy"><small>Licensed under the Apache License, Version 2.0</small></p> |
| </footer> |
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