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cassandra-server

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A thin Javascript wrapper around Apache Cassandra to provide out of the box server support

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <!-- NewPage --> <html lang="en"> <head> <!-- Generated by javadoc (version 1.7.0_67) on Sun Sep 07 15:29:27 CEST 2014 --> <title>ColumnFamily (apache-cassandra API)</title> <meta name="date" content="2014-09-07"> <link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style"> </head> <body> <script type="text/javascript"><!-- if (location.href.indexOf('is-external=true') == -1) { parent.document.title="ColumnFamily (apache-cassandra API)"; } //--> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript> <!-- ========= START OF TOP NAVBAR ======= --> <div class="topNav"><a name="navbar_top"> <!-- --> </a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow"> <!-- --> </a> <ul class="navList" title="Navigation"> <li><a href="../../../../overview-summary.html">Overview</a></li> <li><a href="package-summary.html">Package</a></li> <li class="navBarCell1Rev">Class</li> <li><a href="class-use/ColumnFamily.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../deprecated-list.html">Deprecated</a></li> <li><a href="../../../../index-all.html">Index</a></li> <li><a href="../../../../help-doc.html">Help</a></li> </ul> </div> <div class="subNav"> <ul class="navList"> <li><a href="../../../../org/apache/cassandra/db/CollationController.html" title="class in org.apache.cassandra.db"><span class="strong">Prev Class</span></a></li> <li><a href="../../../../org/apache/cassandra/db/ColumnFamily.Factory.html" title="class in org.apache.cassandra.db"><span class="strong">Next Class</span></a></li> </ul> <ul class="navList"> <li><a href="../../../../index.html?org/apache/cassandra/db/ColumnFamily.html" target="_top">Frames</a></li> <li><a href="ColumnFamily.html" target="_top">No Frames</a></li> </ul> <ul class="navList" id="allclasses_navbar_top"> <li><a href="../../../../allclasses-noframe.html">All Classes</a></li> </ul> <div> <script type="text/javascript"><!-- allClassesLink = document.getElementById("allclasses_navbar_top"); if(window==top) { allClassesLink.style.display = "block"; } else { allClassesLink.style.display = "none"; } //--> </script> </div> <div> <ul class="subNavList"> <li>Summary:&nbsp;</li> <li><a href="#nested_class_summary">Nested</a>&nbsp;|&nbsp;</li> <li><a href="#field_summary">Field</a>&nbsp;|&nbsp;</li> <li><a href="#constructor_summary">Constr</a>&nbsp;|&nbsp;</li> <li><a href="#method_summary">Method</a></li> </ul> <ul class="subNavList"> <li>Detail:&nbsp;</li> <li><a href="#field_detail">Field</a>&nbsp;|&nbsp;</li> <li><a href="#constructor_detail">Constr</a>&nbsp;|&nbsp;</li> <li><a href="#method_detail">Method</a></li> </ul> </div> <a name="skip-navbar_top"> <!-- --> </a></div> <!-- ========= END OF TOP NAVBAR ========= --> <!-- ======== START OF CLASS DATA ======== --> <div class="header"> <div class="subTitle">org.apache.cassandra.db</div> <h2 title="Class ColumnFamily" class="title">Class ColumnFamily</h2> </div> <div class="contentContainer"> <ul class="inheritance"> <li>java.lang.Object</li> <li> <ul class="inheritance"> <li>org.apache.cassandra.db.ColumnFamily</li> </ul> </li> </ul> <div class="description"> <ul class="blockList"> <li class="blockList"> <dl> <dt>All Implemented Interfaces:</dt> <dd>java.lang.Iterable&lt;<a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a>&gt;, <a href="../../../../org/apache/cassandra/cache/IRowCacheEntry.html" title="interface in org.apache.cassandra.cache">IRowCacheEntry</a></dd> </dl> <dl> <dt>Direct Known Subclasses:</dt> <dd><a href="../../../../org/apache/cassandra/db/ArrayBackedSortedColumns.html" title="class in org.apache.cassandra.db">ArrayBackedSortedColumns</a>, <a href="../../../../org/apache/cassandra/db/AtomicBTreeColumns.html" title="class in org.apache.cassandra.db">AtomicBTreeColumns</a></dd> </dl> <hr> <br> <pre>public abstract class <span class="strong">ColumnFamily</span> extends java.lang.Object implements java.lang.Iterable&lt;<a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a>&gt;, <a href="../../../../org/apache/cassandra/cache/IRowCacheEntry.html" title="interface in org.apache.cassandra.cache">IRowCacheEntry</a></pre> <div class="block">A sorted map of columns. This represents the backing map of a colum family. Whether the implementation is thread safe or not is left to the implementing classes.</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList"> <!-- ======== NESTED CLASS SUMMARY ======== --> <ul class="blockList"> <li class="blockList"><a name="nested_class_summary"> <!-- --> </a> <h3>Nested Class Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Nested Class Summary table, listing nested classes, and an explanation"> <caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption> <tr> <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>static class&nbsp;</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.Factory.html" title="class in org.apache.cassandra.db">ColumnFamily.Factory</a>&lt;<a href="../../../../org/apache/cassandra/db/ColumnFamily.Factory.html" title="type parameter in ColumnFamily.Factory">T</a> extends <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&gt;</strong></code>&nbsp;</td> </tr> </table> </li> </ul> <!-- =========== FIELD SUMMARY =========== --> <ul class="blockList"> <li class="blockList"><a name="field_summary"> <!-- --> </a> <h3>Field Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation"> <caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Field and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>protected <a href="../../../../org/apache/cassandra/config/CFMetaData.html" title="class in org.apache.cassandra.config">CFMetaData</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#metadata">metadata</a></strong></code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/db/ColumnFamilySerializer.html" title="class in org.apache.cassandra.db">ColumnFamilySerializer</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#serializer">serializer</a></strong></code>&nbsp;</td> </tr> </table> </li> </ul> <!-- ======== CONSTRUCTOR SUMMARY ======== --> <ul class="blockList"> <li class="blockList"><a name="constructor_summary"> <!-- --> </a> <h3>Constructor Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation"> <caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption> <tr> <th class="colFirst" scope="col">Modifier</th> <th class="colLast" scope="col">Constructor and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>protected </code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#ColumnFamily(org.apache.cassandra.config.CFMetaData)">ColumnFamily</a></strong>(<a href="../../../../org/apache/cassandra/config/CFMetaData.html" title="class in org.apache.cassandra.config">CFMetaData</a>&nbsp;metadata)</code>&nbsp;</td> </tr> </table> </li> </ul> <!-- ========== METHOD SUMMARY =========== --> <ul class="blockList"> <li class="blockList"><a name="method_summary"> <!-- --> </a> <h3>Method Summary</h3> <table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> <caption><span>Methods</span><span class="tabEnd">&nbsp;</span></caption> <tr> <th class="colFirst" scope="col">Modifier and Type</th> <th class="colLast" scope="col">Method and Description</th> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addAll(org.apache.cassandra.db.ColumnFamily)">addAll</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;cm)</code> <div class="block">Adds all the columns of a given column map to this column map.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addAtom(org.apache.cassandra.db.OnDiskAtom)">addAtom</a></strong>(<a href="../../../../org/apache/cassandra/db/OnDiskAtom.html" title="interface in org.apache.cassandra.db">OnDiskAtom</a>&nbsp;atom)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addColumn(org.apache.cassandra.db.Cell)">addColumn</a></strong>(<a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a>&nbsp;cell)</code> <div class="block">Adds a cell to this cell map.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addColumn(org.apache.cassandra.db.composites.CellName,%20java.nio.ByteBuffer,%20long)">addColumn</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name, java.nio.ByteBuffer&nbsp;value, long&nbsp;timestamp)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addColumn(org.apache.cassandra.db.composites.CellName,%20java.nio.ByteBuffer,%20long,%20int)">addColumn</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name, java.nio.ByteBuffer&nbsp;value, long&nbsp;timestamp, int&nbsp;timeToLive)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addCounter(org.apache.cassandra.db.composites.CellName,%20long)">addCounter</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name, long&nbsp;value)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addTombstone(org.apache.cassandra.db.composites.CellName,%20java.nio.ByteBuffer,%20long)">addTombstone</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name, java.nio.ByteBuffer&nbsp;localDeletionTime, long&nbsp;timestamp)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#addTombstone(org.apache.cassandra.db.composites.CellName,%20int,%20long)">addTombstone</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name, int&nbsp;localDeletionTime, long&nbsp;timestamp)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.util.Map&lt;<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>,java.nio.ByteBuffer&gt;</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#asMap()">asMap</a></strong>()</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#clear()">clear</a></strong>()</code> <div class="block">Clear this column family, removing all columns and deletion info.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#cloneMe()">cloneMe</a></strong>()</code> <div class="block">Clones the column map.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#cloneMeShallow()">cloneMeShallow</a></strong>()</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>&lt;T extends <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&gt;&nbsp;<br>T</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#cloneMeShallow(org.apache.cassandra.db.ColumnFamily.Factory,%20boolean)">cloneMeShallow</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.Factory.html" title="class in org.apache.cassandra.db">ColumnFamily.Factory</a>&lt;T&gt;&nbsp;factory, boolean&nbsp;reversedInsertOrder)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>long</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#dataSize()">dataSize</a></strong>()</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#delete(org.apache.cassandra.db.ColumnFamily)">delete</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;columns)</code> <div class="block">If `columns` has any tombstones (top-level or range tombstones), they will be applied to this set of columns.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#delete(org.apache.cassandra.db.DeletionInfo)">delete</a></strong>(<a href="../../../../org/apache/cassandra/db/DeletionInfo.html" title="class in org.apache.cassandra.db">DeletionInfo</a>&nbsp;info)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#delete(org.apache.cassandra.db.DeletionTime)">delete</a></strong>(<a href="../../../../org/apache/cassandra/db/DeletionTime.html" title="class in org.apache.cassandra.db">DeletionTime</a>&nbsp;deletionTime)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected abstract void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#delete(org.apache.cassandra.db.RangeTombstone)">delete</a></strong>(<a href="../../../../org/apache/cassandra/db/RangeTombstone.html" title="class in org.apache.cassandra.db">RangeTombstone</a>&nbsp;tombstone)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract <a href="../../../../org/apache/cassandra/db/DeletionInfo.html" title="class in org.apache.cassandra.db">DeletionInfo</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#deletionInfo()">deletionInfo</a></strong>()</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#diff(org.apache.cassandra.db.ColumnFamily)">diff</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;cfComposite)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#diff(org.apache.cassandra.db.ColumnFamily,%20org.apache.cassandra.db.ColumnFamily)">diff</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;cf1, <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;cf2)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static java.nio.ByteBuffer</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#digest(org.apache.cassandra.db.ColumnFamily)">digest</a></strong>(<a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a>&nbsp;cf)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>boolean</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#equals(java.lang.Object)">equals</a></strong>(java.lang.Object&nbsp;o)</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <a href="../../../../org/apache/cassandra/db/ColumnFamily.html" title="class in org.apache.cassandra.db">ColumnFamily</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#fromBytes(java.nio.ByteBuffer)">fromBytes</a></strong>(java.nio.ByteBuffer&nbsp;bytes)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract <a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getColumn(org.apache.cassandra.db.composites.CellName)">getColumn</a></strong>(<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&nbsp;name)</code> <div class="block">Get a column given its name, returning null if the column is not present.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getColumnCount()">getColumnCount</a></strong>()</code> <div class="block">Returns the number of columns in this map.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract java.lang.Iterable&lt;<a href="../../../../org/apache/cassandra/db/composites/CellName.html" title="interface in org.apache.cassandra.db.composites">CellName</a>&gt;</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getColumnNames()">getColumnNames</a></strong>()</code> <div class="block">Returns an iterable with the names of columns in this column map in the same order as the underlying columns themselves.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code><a href="../../../../org/apache/cassandra/io/sstable/ColumnStats.html" title="class in org.apache.cassandra.io.sstable">ColumnStats</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getColumnStats()">getColumnStats</a></strong>()</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../org/apache/cassandra/db/composites/CellNameType.html" title="interface in org.apache.cassandra.db.composites">CellNameType</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getComparator()">getComparator</a></strong>()</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract <a href="../../../../org/apache/cassandra/db/ColumnFamily.Factory.html" title="class in org.apache.cassandra.db">ColumnFamily.Factory</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getFactory()">getFactory</a></strong>()</code> <div class="block">Returns the factory used for this ISortedColumns implementation.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>abstract java.util.Collection&lt;<a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a>&gt;</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getReverseSortedColumns()">getReverseSortedColumns</a></strong>()</code> <div class="block">Returns the columns of this column map as a collection.</div> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract java.util.Collection&lt;<a href="../../../../org/apache/cassandra/db/Cell.html" title="interface in org.apache.cassandra.db">Cell</a>&gt;</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getSortedColumns()">getSortedColumns</a></strong>()</code> <div class="block">Returns the columns of this column map as a collection.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code><a href="../../../../org/apache/cassandra/db/ColumnFamilyType.html" title="enum in org.apache.cassandra.db">ColumnFamilyType</a></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#getType()">getType</a></strong>()</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>abstract boolean</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#hasColumns()">hasColumns</a></strong>()</code> <div class="block">Returns whether or not there are any columns present.</div> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>int</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#hashCode()">hashCode</a></strong>()</code>&nbsp;</td> </tr> <tr class="rowColor"> <td class="colFirst"><code>boolean</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/db/ColumnFamily.html#hasOnlyTombstones(long)">hasOnlyTombstones</a></strong>(long&nbsp;now)</code>&nbsp;</td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.util.UUID</code></td> <td 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