File size: 18,185 Bytes
2795186 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 |
<!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 (1.8.0_382) on Sat Oct 21 16:38:48 UTC 2023 -->
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>QueryProcessor (JanusGraph-Core: Core Library for JanusGraph 1.0.0 API)</title>
<meta name="date" content="2023-10-21">
<link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style">
<script type="text/javascript" src="../../../../script.js"></script>
</head>
<body>
<script type="text/javascript"><!--
try {
if (location.href.indexOf('is-external=true') == -1) {
parent.document.title="QueryProcessor (JanusGraph-Core: Core Library for JanusGraph 1.0.0 API)";
}
}
catch(err) {
}
//-->
var methods = {"i0":10};
var tabs = {65535:["t0","All Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]};
var altColor = "altColor";
var rowColor = "rowColor";
var tableTab = "tableTab";
var activeTableTab = "activeTableTab";
</script>
<noscript>
<div>JavaScript is disabled on your browser.</div>
</noscript>
<!-- ========= START OF TOP NAVBAR ======= -->
<div class="topNav"><a name="navbar.top">
<!-- -->
</a>
<div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div>
<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/QueryProcessor.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/janusgraph/graphdb/query/QueryExecutor.html" title="interface in org.janusgraph.graphdb.query"><span class="typeNameLink">Prev Class</span></a></li>
<li><a href="../../../../org/janusgraph/graphdb/query/QueryUtil.html" title="class in org.janusgraph.graphdb.query"><span class="typeNameLink">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/janusgraph/graphdb/query/QueryProcessor.html" target="_top">Frames</a></li>
<li><a href="QueryProcessor.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">
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary: </li>
<li>Nested | </li>
<li>Field | </li>
<li><a href="#constructor.summary">Constr</a> | </li>
<li><a href="#method.summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail: </li>
<li>Field | </li>
<li><a href="#constructor.detail">Constr</a> | </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.janusgraph.graphdb.query</div>
<h2 title="Class QueryProcessor" class="title">Class QueryProcessor<Q extends <a href="../../../../org/janusgraph/graphdb/query/ElementQuery.html" title="interface in org.janusgraph.graphdb.query">ElementQuery</a><R,B>,R extends <a href="../../../../org/janusgraph/core/JanusGraphElement.html" title="interface in org.janusgraph.core">JanusGraphElement</a>,B extends <a href="../../../../org/janusgraph/graphdb/query/BackendQuery.html" title="interface in org.janusgraph.graphdb.query">BackendQuery</a><B>></h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li>
<li>
<ul class="inheritance">
<li>org.janusgraph.graphdb.query.QueryProcessor<Q,R,B></li>
</ul>
</li>
</ul>
<div class="description">
<ul class="blockList">
<li class="blockList">
<dl>
<dt>All Implemented Interfaces:</dt>
<dd><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><R></dd>
</dl>
<hr>
<br>
<pre>public class <span class="typeNameLabel">QueryProcessor<Q extends <a href="../../../../org/janusgraph/graphdb/query/ElementQuery.html" title="interface in org.janusgraph.graphdb.query">ElementQuery</a><R,B>,R extends <a href="../../../../org/janusgraph/core/JanusGraphElement.html" title="interface in org.janusgraph.core">JanusGraphElement</a>,B extends <a href="../../../../org/janusgraph/graphdb/query/BackendQuery.html" title="interface in org.janusgraph.graphdb.query">BackendQuery</a><B>></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>
implements <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><R></pre>
<div class="block">Executes a given <a href="../../../../org/janusgraph/graphdb/query/ElementQuery.html" title="interface in org.janusgraph.graphdb.query"><code>ElementQuery</code></a> against a provided <a href="../../../../org/janusgraph/graphdb/query/QueryExecutor.html" title="interface in org.janusgraph.graphdb.query"><code>QueryExecutor</code></a> to produce the result set of elements.
<p>
The QueryProcessor creates a number of stacked iterators. <br>
At the highest level, the OuterIterator ensures that the correct (up to the given limit) number of elements is returned. It also provides the implementation of remove()
by calling the element's remove() method. <br>
The OuterIterator wraps the "unfolded" iterator which is a combination of the individual result set iterators of the sub-queries of the given query (see <a href="../../../../org/janusgraph/graphdb/query/ElementQuery.html#getSubQuery-int-"><code>ElementQuery.getSubQuery(int)</code></a>.
The unfolded iterator combines this iterators by checking whether 1) the result sets need additional filtering (if so, a filter iterator is wrapped around it) and 2) whether
the final result set needs to be sorted and in what order. If the result set needs to be sorted and the individual sub-query result sets aren't, then a PreSortingIterator is wrapped around
the iterator which effectively iterates the result set out, sorts it and then returns an iterator (i.e. much more expensive than exploiting existing sort orders).<br>
In this way, the individual sub-result sets are prepared and then merged together the MergeSortIterator (which conserves sort order if present).
The semantics of the queries is OR, meaning the result sets are combined.
However, when <a href="../../../../org/janusgraph/graphdb/query/ElementQuery.html#hasDuplicateResults--"><code>ElementQuery.hasDuplicateResults()</code></a> is true (which assumes that the result set is sorted) then the merge sort iterator
filters out immediate duplicates.</div>
<dl>
<dt><span class="simpleTagLabel">Author:</span></dt>
<dd>Matthias Broecheler (me@matthiasb.com)</dd>
</dl>
</li>
</ul>
</div>
<div class="summary">
<ul class="blockList">
<li class="blockList">
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.summary">
<!-- -->
</a>
<h3>Constructor Summary</h3>
<table class="memberSummary" 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="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html#QueryProcessor-Q-org.janusgraph.graphdb.query.QueryExecutor-">QueryProcessor</a></span>(<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">Q</a> query,
<a href="../../../../org/janusgraph/graphdb/query/QueryExecutor.html" title="interface in org.janusgraph.graphdb.query">QueryExecutor</a><<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">Q</a>,<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">R</a>,<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">B</a>> executor)</code> </td>
</tr>
</table>
</li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
<ul class="blockList">
<li class="blockList"><a name="method.summary">
<!-- -->
</a>
<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>org.apache.tinkerpop.gremlin.structure.util.CloseableIterator<<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">R</a>></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html#iterator--">iterator</a></span>()</code> </td>
</tr>
</table>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
<!-- -->
</a>
<h3>Methods inherited from class 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>
</ul>
<ul class="blockList">
<li class="blockList"><a name="methods.inherited.from.class.java.lang.Iterable">
<!-- -->
</a>
<h3>Methods inherited from interface java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#forEach-java.util.function.Consumer-" title="class or interface in java.lang">forEach</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#spliterator--" title="class or interface in java.lang">spliterator</a></code></li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
<div class="details">
<ul class="blockList">
<li class="blockList">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.detail">
<!-- -->
</a>
<h3>Constructor Detail</h3>
<a name="QueryProcessor-org.janusgraph.graphdb.query.ElementQuery-org.janusgraph.graphdb.query.QueryExecutor-">
<!-- -->
</a><a name="QueryProcessor-Q-org.janusgraph.graphdb.query.QueryExecutor-">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>QueryProcessor</h4>
<pre>public QueryProcessor(<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">Q</a> query,
<a href="../../../../org/janusgraph/graphdb/query/QueryExecutor.html" title="interface in org.janusgraph.graphdb.query">QueryExecutor</a><<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">Q</a>,<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">R</a>,<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">B</a>> executor)</pre>
</li>
</ul>
</li>
</ul>
<!-- ============ METHOD DETAIL ========== -->
<ul class="blockList">
<li class="blockList"><a name="method.detail">
<!-- -->
</a>
<h3>Method Detail</h3>
<a name="iterator--">
<!-- -->
</a>
<ul class="blockListLast">
<li class="blockList">
<h4>iterator</h4>
<pre>public org.apache.tinkerpop.gremlin.structure.util.CloseableIterator<<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">R</a>> iterator()</pre>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true#iterator--" title="class or interface in java.lang">iterator</a></code> in interface <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="class or interface in java.lang">Iterable</a><<a href="../../../../org/janusgraph/graphdb/query/QueryProcessor.html" title="type parameter in QueryProcessor">R</a> extends <a href="../../../../org/janusgraph/core/JanusGraphElement.html" title="interface in org.janusgraph.core">JanusGraphElement</a>></code></dd>
</dl>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
</div>
<!-- ========= END OF CLASS DATA ========= -->
<!-- ======= START OF BOTTOM NAVBAR ====== -->
<div class="bottomNav"><a name="navbar.bottom">
<!-- -->
</a>
<div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div>
<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/QueryProcessor.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/janusgraph/graphdb/query/QueryExecutor.html" title="interface in org.janusgraph.graphdb.query"><span class="typeNameLink">Prev Class</span></a></li>
<li><a href="../../../../org/janusgraph/graphdb/query/QueryUtil.html" title="class in org.janusgraph.graphdb.query"><span class="typeNameLink">Next Class</span></a></li>
</ul>
<ul class="navList">
<li><a href="../../../../index.html?org/janusgraph/graphdb/query/QueryProcessor.html" target="_top">Frames</a></li>
<li><a href="QueryProcessor.html" target="_top">No Frames</a></li>
</ul>
<ul class="navList" id="allclasses_navbar_bottom">
<li><a href="../../../../allclasses-noframe.html">All Classes</a></li>
</ul>
<div>
<script type="text/javascript">
</script>
</div>
<div>
<ul class="subNavList">
<li>Summary: </li>
<li>Nested | </li>
<li>Field | </li>
<li><a href="#constructor.summary">Constr</a> | </li>
<li><a href="#method.summary">Method</a></li>
</ul>
<ul class="subNavList">
<li>Detail: </li>
<li>Field | </li>
<li><a href="#constructor.detail">Constr</a> | </li>
<li><a href="#method.detail">Method</a></li>
</ul>
</div>
<a name="skip.navbar.bottom">
<!-- -->
</a></div>
<!-- ======== END OF BOTTOM NAVBAR ======= -->
<p class="legalCopy"><small>Copyright © 2012–2023. All rights reserved.</small></p>
</body>
</html>
|