| <!DOCTYPE HTML> |
| <!-- NewPage --> |
| <html lang="en"> |
| <head> |
| <!-- Generated by javadoc --> |
| <title>ReflectiveRelMetadataProvider (Apache Calcite API)</title> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <link rel="stylesheet" type="text/css" href="../../../../../stylesheet.css" title="Style"> |
| <link rel="stylesheet" type="text/css" href="../../../../../jquery/jquery-ui.css" title="Style"> |
| <script type="text/javascript" src="../../../../../script.js"></script> |
| <script type="text/javascript" src="../../../../../jquery/jszip/dist/jszip.min.js"></script> |
| <script type="text/javascript" src="../../../../../jquery/jszip-utils/dist/jszip-utils.min.js"></script> |
| <!--[if IE]> |
| <script type="text/javascript" src="../../../../../jquery/jszip-utils/dist/jszip-utils-ie.min.js"></script> |
| <![endif]--> |
| <script type="text/javascript" src="../../../../../jquery/jquery-3.3.1.js"></script> |
| <script type="text/javascript" src="../../../../../jquery/jquery-migrate-3.0.1.js"></script> |
| <script type="text/javascript" src="../../../../../jquery/jquery-ui.js"></script> |
| </head> |
| <body> |
| <script type="text/javascript"><!-- |
| try { |
| if (location.href.indexOf('is-external=true') == -1) { |
| parent.document.title="ReflectiveRelMetadataProvider (Apache Calcite API)"; |
| } |
| } |
| catch(err) { |
| } |
| //--> |
| var data = {"i0":10,"i1":10,"i2":9,"i3":10,"i4":9,"i5":9,"i6":9}; |
| var tabs = {65535:["t0","All Methods"],1:["t1","Static Methods"],2:["t2","Instance Methods"],8:["t4","Concrete Methods"]}; |
| var altColor = "altColor"; |
| var rowColor = "rowColor"; |
| var tableTab = "tableTab"; |
| var activeTableTab = "activeTableTab"; |
| var pathtoroot = "../../../../../"; |
| var useModuleDirectories = true; |
| loadScripts(document, 'script');</script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| <header role="banner"> |
| <nav role="navigation"> |
| <div class="fixedNav"> |
| <!-- ========= START OF TOP NAVBAR ======= --> |
| <div class="topNav"><a id="navbar.top"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.top" title="Skip navigation links">Skip navigation links</a></div> |
| <a id="navbar.top.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../index.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="class-use/ReflectiveRelMetadataProvider.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" id="allclasses_navbar_top"> |
| <li><a href="../../../../../allclasses.html">All Classes</a></li> |
| </ul> |
| <ul class="navListSearch"> |
| <li><label for="search">SEARCH:</label> |
| <input type="text" id="search" value="search" disabled="disabled"> |
| <input type="reset" id="reset" value="reset" disabled="disabled"> |
| </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> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </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><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a id="skip.navbar.top"> |
| <!-- --> |
| </a></div> |
| <!-- ========= END OF TOP NAVBAR ========= --> |
| </div> |
| <div class="navPadding"> </div> |
| <script type="text/javascript"><!-- |
| $('.navPadding').css('padding-top', $('.fixedNav').css("height")); |
| //--> |
| </script> |
| </nav> |
| </header> |
| <!-- ======== START OF CLASS DATA ======== --> |
| <main role="main"> |
| <div class="header"> |
| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.rel.metadata</a></div> |
| <h2 title="Class ReflectiveRelMetadataProvider" class="title">Class ReflectiveRelMetadataProvider</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.rel.metadata.ReflectiveRelMetadataProvider</li> |
| </ul> |
| </li> |
| </ul> |
| <div class="description"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code>, <code><a href="../../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">ReflectiveRelMetadataProvider</span> |
| extends java.lang.Object |
| implements <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a>, <a href="../../util/ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a></pre> |
| <div class="block">Implementation of the <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata"><code>RelMetadataProvider</code></a> interface that dispatches |
| metadata methods to methods on a given object via reflection. |
| |
| <p>The methods on the target object must be public and non-static, and have |
| the same signature as the implemented metadata method except for an |
| additional first parameter of type <a href="../RelNode.html" title="interface in org.apache.calcite.rel"><code>RelNode</code></a> or a sub-class. That |
| parameter gives this provider an indication of that relational expressions it |
| can handle.</p> |
| |
| <p>For an example, see <a href="RelMdColumnOrigins.html#SOURCE"><code>RelMdColumnOrigins.SOURCE</code></a>.</div> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="nested.class.summary"> |
| <!-- --> |
| </a> |
| <h3>Nested Class Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Class</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReflectiveRelMetadataProvider.Space.html" title="class in org.apache.calcite.rel.metadata">ReflectiveRelMetadataProvider.Space</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Workspace for computing which methods can act as handlers for |
| given metadata methods.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReflectiveRelMetadataProvider.Space2.html" title="class in org.apache.calcite.rel.metadata">ReflectiveRelMetadataProvider.Space2</a></span></code></th> |
| <td class="colLast"> |
| <div class="block">Extended work space.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- =========== FIELD SUMMARY =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="field.summary"> |
| <!-- --> |
| </a> |
| <h3>Field Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private com.google.common.collect.ImmutableMultimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#handlerMap">handlerMap</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private java.util.concurrent.ConcurrentMap<java.lang.Class<<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>>,​<a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#map">map</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private java.lang.Class<? extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#metadataClass0">metadataClass0</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="constructor.summary"> |
| <!-- --> |
| </a> |
| <h3>Constructor Summary</h3> |
| <table class="memberSummary"> |
| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier</th> |
| <th class="colSecond" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected </code></td> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E(java.util.concurrent.ConcurrentMap,java.lang.Class,com.google.common.collect.Multimap)">ReflectiveRelMetadataProvider</a></span>​(java.util.concurrent.ConcurrentMap<java.lang.Class<<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>>,​<a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>> map, |
| java.lang.Class<? extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> metadataClass0, |
| com.google.common.collect.Multimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>> handlerMap)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a ReflectiveRelMetadataProvider.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| </section> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="method.summary"> |
| <!-- --> |
| </a> |
| <h3>Method Summary</h3> |
| <table class="memberSummary"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>><br><a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a><M></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#apply(java.lang.Class)">apply</a></span>​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> relClass)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>><br><a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a><M></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#apply(java.lang.Class,java.lang.Class)">apply</a></span>​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> relClass, |
| java.lang.Class<? extends M> metadataClass)</code></th> |
| <td class="colLast"> |
| <div class="block">Retrieves metadata of a particular type and for a particular sub-class |
| of relational expression.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#couldImplement(java.lang.reflect.Method,java.lang.reflect.Method)">couldImplement</a></span>​(java.lang.reflect.Method handlerMethod, |
| java.lang.reflect.Method method)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>><br>com.google.common.collect.Multimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a><M>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#handlers(org.apache.calcite.rel.metadata.MetadataDef)">handlers</a></span>​(<a href="MetadataDef.html" title="class in org.apache.calcite.rel.metadata">MetadataDef</a><M> def)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reflectiveSource(java.lang.reflect.Method,org.apache.calcite.rel.metadata.MetadataHandler)">reflectiveSource</a></span>​(java.lang.reflect.Method method, |
| <a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns an implementation of <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata"><code>RelMetadataProvider</code></a> that scans for |
| methods with a preceding argument.</div> |
| </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reflectiveSource(org.apache.calcite.rel.metadata.MetadataHandler,com.google.common.collect.ImmutableList)">reflectiveSource</a></span>​(<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target, |
| com.google.common.collect.ImmutableList<java.lang.reflect.Method> methods)</code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#reflectiveSource(org.apache.calcite.rel.metadata.MetadataHandler,java.lang.reflect.Method...)">reflectiveSource</a></span>​(<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target, |
| java.lang.reflect.Method... methods)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a reflective metadata provider that implements several |
| methods.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a id="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> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="field.detail"> |
| <!-- --> |
| </a> |
| <h3>Field Detail</h3> |
| <a id="map"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>map</h4> |
| <pre>private final java.util.concurrent.ConcurrentMap<java.lang.Class<<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>>,​<a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>> map</pre> |
| </li> |
| </ul> |
| <a id="metadataClass0"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>metadataClass0</h4> |
| <pre>private final java.lang.Class<? extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> metadataClass0</pre> |
| </li> |
| </ul> |
| <a id="handlerMap"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>handlerMap</h4> |
| <pre>private final com.google.common.collect.ImmutableMultimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>> handlerMap</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a id="<init>(java.util.concurrent.ConcurrentMap,java.lang.Class,com.google.common.collect.Multimap)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ReflectiveRelMetadataProvider</h4> |
| <pre>protected ReflectiveRelMetadataProvider​(java.util.concurrent.ConcurrentMap<java.lang.Class<<a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>>,​<a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a>> map, |
| java.lang.Class<? extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> metadataClass0, |
| com.google.common.collect.Multimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a>> handlerMap)</pre> |
| <div class="block">Creates a ReflectiveRelMetadataProvider.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>map</code> - Map</dd> |
| <dd><code>metadataClass0</code> - Metadata class</dd> |
| <dd><code>handlerMap</code> - Methods handled and the objects to call them on</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| <!-- ============ METHOD DETAIL ========== --> |
| <section role="region"> |
| <ul class="blockList"> |
| <li class="blockList"><a id="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a id="reflectiveSource(java.lang.reflect.Method,org.apache.calcite.rel.metadata.MetadataHandler)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reflectiveSource</h4> |
| <pre class="methodSignature">public static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a> reflectiveSource​(java.lang.reflect.Method method, |
| <a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target)</pre> |
| <div class="block">Returns an implementation of <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata"><code>RelMetadataProvider</code></a> that scans for |
| methods with a preceding argument. |
| |
| <p>For example, <a href="BuiltInMetadata.Selectivity.html" title="interface in org.apache.calcite.rel.metadata"><code>BuiltInMetadata.Selectivity</code></a> has a method |
| <a href="BuiltInMetadata.Selectivity.html#getSelectivity(org.apache.calcite.rex.RexNode)"><code>BuiltInMetadata.Selectivity.getSelectivity(RexNode)</code></a>. |
| A class</p> |
| |
| <blockquote><pre><code> |
| class RelMdSelectivity { |
| public Double getSelectivity(Union rel, RexNode predicate) { } |
| public Double getSelectivity(Filter rel, RexNode predicate) { } |
| </code></pre></blockquote> |
| |
| <p>provides implementations of selectivity for relational expressions |
| that extend <a href="../core/Union.html" title="class in org.apache.calcite.rel.core"><code>Union</code></a> |
| or <a href="../core/Filter.html" title="class in org.apache.calcite.rel.core"><code>Filter</code></a>.</p></div> |
| </li> |
| </ul> |
| <a id="reflectiveSource(org.apache.calcite.rel.metadata.MetadataHandler,java.lang.reflect.Method...)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reflectiveSource</h4> |
| <pre class="methodSignature">public static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a> reflectiveSource​(<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target, |
| java.lang.reflect.Method... methods)</pre> |
| <div class="block">Returns a reflective metadata provider that implements several |
| methods.</div> |
| </li> |
| </ul> |
| <a id="reflectiveSource(org.apache.calcite.rel.metadata.MetadataHandler,com.google.common.collect.ImmutableList)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>reflectiveSource</h4> |
| <pre class="methodSignature">private static <a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a> reflectiveSource​(<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a> target, |
| com.google.common.collect.ImmutableList<java.lang.reflect.Method> methods)</pre> |
| </li> |
| </ul> |
| <a id="handlers(org.apache.calcite.rel.metadata.MetadataDef)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>handlers</h4> |
| <pre class="methodSignature">public <M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> com.google.common.collect.Multimap<java.lang.reflect.Method,​<a href="MetadataHandler.html" title="interface in org.apache.calcite.rel.metadata">MetadataHandler</a><M>> handlers​(<a href="MetadataDef.html" title="class in org.apache.calcite.rel.metadata">MetadataDef</a><M> def)</pre> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="RelMetadataProvider.html#handlers(org.apache.calcite.rel.metadata.MetadataDef)">handlers</a></code> in interface <code><a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="couldImplement(java.lang.reflect.Method,java.lang.reflect.Method)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>couldImplement</h4> |
| <pre class="methodSignature">private static boolean couldImplement​(java.lang.reflect.Method handlerMethod, |
| java.lang.reflect.Method method)</pre> |
| </li> |
| </ul> |
| <a id="apply(java.lang.Class,java.lang.Class)"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>apply</h4> |
| <pre class="methodSignature">public <M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> <a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a><M> apply​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> relClass, |
| java.lang.Class<? extends M> metadataClass)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="RelMetadataProvider.html#apply(java.lang.Class,java.lang.Class)">RelMetadataProvider</a></code></span></div> |
| <div class="block">Retrieves metadata of a particular type and for a particular sub-class |
| of relational expression. |
| |
| <p>The object returned is a function. It can be applied to a relational |
| expression of the given type to create a metadata object.</p> |
| |
| <p>For example, you might call</p> |
| |
| <blockquote><pre> |
| RelMetadataProvider provider; |
| LogicalFilter filter; |
| RexNode predicate; |
| Function<RelNode, Metadata> function = |
| provider.apply(LogicalFilter.class, Selectivity.class}; |
| Selectivity selectivity = function.apply(filter); |
| Double d = selectivity.selectivity(predicate); |
| </pre></blockquote></div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="RelMetadataProvider.html#apply(java.lang.Class,java.lang.Class)">apply</a></code> in interface <code><a href="RelMetadataProvider.html" title="interface in org.apache.calcite.rel.metadata">RelMetadataProvider</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>relClass</code> - Type of relational expression</dd> |
| <dd><code>metadataClass</code> - Type of metadata</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Function that will field a metadata instance; or null if this |
| provider cannot supply metadata of this type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a id="apply(java.lang.Class)"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>apply</h4> |
| <pre class="methodSignature">public <M extends <a href="Metadata.html" title="interface in org.apache.calcite.rel.metadata">Metadata</a>> <a href="UnboundMetadata.html" title="interface in org.apache.calcite.rel.metadata">UnboundMetadata</a><M> apply​(java.lang.Class<? extends <a href="../RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>> relClass)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </div> |
| </div> |
| </main> |
| <!-- ========= END OF CLASS DATA ========= --> |
| <footer role="contentinfo"> |
| <nav role="navigation"> |
| <!-- ======= START OF BOTTOM NAVBAR ====== --> |
| <div class="bottomNav"><a id="navbar.bottom"> |
| <!-- --> |
| </a> |
| <div class="skipNav"><a href="#skip.navbar.bottom" title="Skip navigation links">Skip navigation links</a></div> |
| <a id="navbar.bottom.firstrow"> |
| <!-- --> |
| </a> |
| <ul class="navList" title="Navigation"> |
| <li><a href="../../../../../index.html">Overview</a></li> |
| <li><a href="package-summary.html">Package</a></li> |
| <li class="navBarCell1Rev">Class</li> |
| <li><a href="class-use/ReflectiveRelMetadataProvider.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" id="allclasses_navbar_bottom"> |
| <li><a href="../../../../../allclasses.html">All Classes</a></li> |
| </ul> |
| <div> |
| <script type="text/javascript"><!-- |
| allClassesLink = document.getElementById("allclasses_navbar_bottom"); |
| if(window==top) { |
| allClassesLink.style.display = "block"; |
| } |
| else { |
| allClassesLink.style.display = "none"; |
| } |
| //--> |
| </script> |
| <noscript> |
| <div>JavaScript is disabled on your browser.</div> |
| </noscript> |
| </div> |
| <div> |
| <ul class="subNavList"> |
| <li>Summary: </li> |
| <li><a href="#nested.class.summary">Nested</a> | </li> |
| <li><a href="#field.summary">Field</a> | </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><a href="#field.detail">Field</a> | </li> |
| <li><a href="#constructor.detail">Constr</a> | </li> |
| <li><a href="#method.detail">Method</a></li> |
| </ul> |
| </div> |
| <a id="skip.navbar.bottom"> |
| <!-- --> |
| </a></div> |
| <!-- ======== END OF BOTTOM NAVBAR ======= --> |
| </nav> |
| <p class="legalCopy"><small>Copyright © 2012–2019 <a href="https://www.apache.org/">The Apache Software Foundation</a>. All rights reserved.</small></p> |
| </footer> |
| </body> |
| </html> |