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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  <html lang="en"> <head>  <title>MergeIterator (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"> </script> <noscript> <div>JavaScript is disabled on your browser.</div> </noscript>  <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/MergeIterator.html">Use</a></li> <li><a href="package-tree.html">Tree</a></li> <li><a href="../../../../deprecated-list.html">Deprecated</a></li> <li><a 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class="blockList"> <dl> <dt>All Implemented Interfaces:</dt> <dd>java.io.Closeable, java.lang.AutoCloseable, java.util.Iterator<Out>, <a href="../../../../org/apache/cassandra/utils/CloseableIterator.html" title="interface in org.apache.cassandra.utils">CloseableIterator</a><Out>, <a href="../../../../org/apache/cassandra/utils/IMergeIterator.html" title="interface in org.apache.cassandra.utils">IMergeIterator</a><In,Out></dd> </dl> <hr> <br> <pre>public abstract class <span class="strong">MergeIterator<In,Out></span> extends com.google.common.collect.AbstractIterator<Out> implements <a href="../../../../org/apache/cassandra/utils/IMergeIterator.html" title="interface in org.apache.cassandra.utils">IMergeIterator</a><In,Out></pre> <div class="block">Merges sorted input iterators which individually contain unique items.</div> </li> </ul> </div> <div class="summary"> <ul class="blockList"> <li class="blockList">  <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"> </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>protected static class </code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.Candidate.html" title="class in org.apache.cassandra.utils">MergeIterator.Candidate</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.Candidate.html" title="type parameter in MergeIterator.Candidate">In</a>></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static class </code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="type parameter in MergeIterator.Reducer">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="type parameter in MergeIterator.Reducer">Out</a>></strong></code> <div class="block">Accumulator that collects values of type A, and outputs a value of type B.</div> </td> </tr> </table> </li> </ul>  <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"> </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 java.util.List<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.html#iterators">iterators</a></strong></code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>protected <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">Out</a>></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.html#reducer">reducer</a></strong></code> </td> </tr> </table> </li> </ul>  <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"> </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/utils/MergeIterator.html#MergeIterator(java.util.List,%20org.apache.cassandra.utils.MergeIterator.Reducer)">MergeIterator</a></strong>(java.util.List<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>> iters, <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">Out</a>> reducer)</code> </td> </tr> </table> </li> </ul>  <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"> </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>void</code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.html#close()">close</a></strong>()</code> </td> </tr> <tr class="rowColor"> <td class="colFirst"><code>static <In,Out> <a href="../../../../org/apache/cassandra/utils/IMergeIterator.html" title="interface in org.apache.cassandra.utils">IMergeIterator</a><In,Out></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.html#get(java.util.List,%20java.util.Comparator,%20org.apache.cassandra.utils.MergeIterator.Reducer)">get</a></strong>(java.util.List<? extends java.util.Iterator<In>> sources, java.util.Comparator<In> comparator, <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><In,Out> reducer)</code> </td> </tr> <tr class="altColor"> <td class="colFirst"><code>java.lang.Iterable<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>></code></td> <td class="colLast"><code><strong><a href="../../../../org/apache/cassandra/utils/MergeIterator.html#iterators()">iterators</a></strong>()</code> </td> </tr> </table> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_com.google.common.collect.AbstractIterator">  </a> <h3>Methods inherited from class com.google.common.collect.AbstractIterator</h3> <code>computeNext, endOfData, hasNext, next, peek</code></li> </ul> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_com.google.common.collect.UnmodifiableIterator">  </a> <h3>Methods inherited from class com.google.common.collect.UnmodifiableIterator</h3> <code>remove</code></li> </ul> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_java.lang.Object">  </a> <h3>Methods inherited from class java.lang.Object</h3> <code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li> </ul> <ul class="blockList"> <li class="blockList"><a name="methods_inherited_from_class_java.util.Iterator">  </a> <h3>Methods inherited from interface java.util.Iterator</h3> <code>hasNext, next, remove</code></li> </ul> </li> </ul> </li> </ul> </div> <div class="details"> <ul class="blockList"> <li class="blockList">  <ul class="blockList"> <li class="blockList"><a name="field_detail">  </a> <h3>Field Detail</h3> <a name="reducer">  </a> <ul class="blockList"> <li class="blockList"> <h4>reducer</h4> <pre>protected final <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">Out</a>> reducer</pre> </li> </ul> <a name="iterators">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>iterators</h4> <pre>protected final java.util.List<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>> iterators</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="constructor_detail">  </a> <h3>Constructor Detail</h3> <a name="MergeIterator(java.util.List, org.apache.cassandra.utils.MergeIterator.Reducer)">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>MergeIterator</h4> <pre>protected MergeIterator(java.util.List<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>> iters, <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">Out</a>> reducer)</pre> </li> </ul> </li> </ul>  <ul class="blockList"> <li class="blockList"><a name="method_detail">  </a> <h3>Method Detail</h3> <a name="get(java.util.List, java.util.Comparator, org.apache.cassandra.utils.MergeIterator.Reducer)">  </a> <ul class="blockList"> <li class="blockList"> <h4>get</h4> <pre>public static <In,Out> <a href="../../../../org/apache/cassandra/utils/IMergeIterator.html" title="interface in org.apache.cassandra.utils">IMergeIterator</a><In,Out> get(java.util.List<? extends java.util.Iterator<In>> sources, java.util.Comparator<In> comparator, <a href="../../../../org/apache/cassandra/utils/MergeIterator.Reducer.html" title="class in org.apache.cassandra.utils">MergeIterator.Reducer</a><In,Out> reducer)</pre> </li> </ul> <a name="iterators()">  </a> <ul class="blockList"> <li class="blockList"> <h4>iterators</h4> <pre>public java.lang.Iterable<? extends java.util.Iterator<<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>>> iterators()</pre> <dl> <dt><strong>Specified by:</strong></dt> <dd><code><a href="../../../../org/apache/cassandra/utils/IMergeIterator.html#iterators()">iterators</a></code> in interface <code><a href="../../../../org/apache/cassandra/utils/IMergeIterator.html" title="interface in org.apache.cassandra.utils">IMergeIterator</a><<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">In</a>,<a href="../../../../org/apache/cassandra/utils/MergeIterator.html" title="type parameter in MergeIterator">Out</a>></code></dd> </dl> </li> </ul> <a name="close()">  </a> <ul class="blockListLast"> <li class="blockList"> <h4>close</h4> <pre>public void close()</pre> <dl> <dt><strong>Specified by:</strong></dt> <dd><code>close</code> in interface <code>java.io.Closeable</code></dd> <dt><strong>Specified by:</strong></dt> <dd><code>close</code> in interface <code>java.lang.AutoCloseable</code></dd> </dl> </li> </ul> </li> </ul> </li> </ul> </div> </div>   <div class="bottomNav"><a name="navbar_bottom">  </a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_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/MergeIterator.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/utils/MD5Digest.html" title="class in 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