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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.util</a></div> |
| <h1 title="Class ReflectUtil" class="title">Class ReflectUtil</h1> |
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| <pre>public abstract class <span class="typeNameLabel">ReflectUtil</span> |
| extends <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></pre> |
| <div class="block">Static utilities for Java reflection.</div> |
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| <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> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="ReflectUtil.MethodDispatcher.html" title="interface in org.apache.calcite.util">ReflectUtil.MethodDispatcher</a><<a href="ReflectUtil.MethodDispatcher.html" title="type parameter in ReflectUtil.MethodDispatcher">T</a>></span></code></th> |
| <td class="colLast"> |
| <div class="block">Can invoke a method on an object of type E with return type T.</div> |
| </td> |
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| <th class="colFirst" scope="col">Constructor</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">ReflectUtil</a></span>()</code></th> |
| <td class="colLast"> </td> |
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| <h2>Method Summary</h2> |
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| <div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t1" class="tableTab" onclick="show(1);">Static Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t4" class="tableTab" onclick="show(8);">Concrete Methods</button></div> |
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| <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> |
| </thead> |
| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code>static <R extends <a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a>,​ |
| E><br><a href="ReflectiveVisitDispatcher.html" title="interface in org.apache.calcite.util">ReflectiveVisitDispatcher</a><R,​E></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createDispatcher(java.lang.Class,java.lang.Class)">createDispatcher</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><R> visitorBaseClazz, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><E> visiteeBaseClazz)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a dispatcher for calls to <a href="#lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String)"><code>lookupVisitMethod(java.lang.Class<?>, java.lang.Class<?>, java.lang.String)</code></a>.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>static <E,​ |
| T> <a href="ReflectUtil.MethodDispatcher.html" title="interface in org.apache.calcite.util">ReflectUtil.MethodDispatcher</a><T></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#createMethodDispatcher(java.lang.Class,org.apache.calcite.util.ReflectiveVisitor,java.lang.String,java.lang.Class,java.lang.Class...)">createMethodDispatcher</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><T> returnClazz, |
| <a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a> visitor, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><E> arg0Clazz, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>... otherArgClasses)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a dispatcher for calls to a single multi-method on a particular |
| object.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getBoxingClass(java.lang.Class)">getBoxingClass</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> primitiveClass)</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the Java boxing class for a primitive class.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getByteBufferReadMethod(java.lang.Class)">getByteBufferReadMethod</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</code></th> |
| <td class="colLast"> |
| <div class="block">Uses reflection to find the correct java.nio.ByteBuffer "absolute get" |
| method for a given primitive type.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getByteBufferWriteMethod(java.lang.Class)">getByteBufferWriteMethod</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</code></th> |
| <td class="colLast"> |
| <div class="block">Uses reflection to find the correct java.nio.ByteBuffer "absolute put" |
| method for a given primitive type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getParameterName(java.lang.reflect.Method,int)">getParameterName</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method, |
| int i)</code></th> |
| <td class="colLast"> |
| <div class="block">Derives the name of the <code>i</code>th parameter of a method.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i6"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUnmangledMethodName(java.lang.Class,java.lang.String,java.lang.Class%5B%5D)">getUnmangledMethodName</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> declaringClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>[] paramTypes)</code></th> |
| <td class="colLast"> |
| <div class="block">Composes a string representing a human-readable method name (with neither |
| exception nor return type information).</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i7"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUnmangledMethodName(java.lang.reflect.Method)">getUnmangledMethodName</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method)</code></th> |
| <td class="colLast"> |
| <div class="block">Composes a string representing a human-readable method name (with neither |
| exception nor return type information).</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i8"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getUnqualifiedClassName(java.lang.Class)">getUnqualifiedClassName</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> c)</code></th> |
| <td class="colLast"> |
| <div class="block">Gets the name of a class with no package qualifiers; if it's an inner |
| class, it will still be qualified by the containing class (X$Y).</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i9"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#invokeVisitor(org.apache.calcite.util.ReflectiveVisitor,java.lang.Object,java.lang.Class,java.lang.String)">invokeVisitor</a></span>​(<a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a> visitor, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a> visitee, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> hierarchyRoot, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName)</code></th> |
| <td class="colLast"> |
| <div class="block">Implements the <a href="Glossary.html#VISITOR_PATTERN"><code>Glossary.VISITOR_PATTERN</code></a> via |
| reflection.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i10"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isParameterOptional(java.lang.reflect.Method,int)">isParameterOptional</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method, |
| int i)</code></th> |
| <td class="colLast"> |
| <div class="block">Derives whether the <code>i</code>th parameter of a method is optional.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i11"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String)">lookupVisitMethod</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visitorClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visiteeClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName)</code></th> |
| <td class="colLast"> |
| <div class="block">Looks up a visit method.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i12"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String,java.util.List)">lookupVisitMethod</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visitorClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visiteeClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>> additionalParameterTypes)</code></th> |
| <td class="colLast"> |
| <div class="block">Looks up a visit method taking additional parameters beyond the |
| overloaded visitee type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i13"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#mightBeAssignableFrom(java.lang.Class,java.lang.Class)">mightBeAssignableFrom</a></span>​(<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> parameterType, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> argumentType)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns whether a parameter of a given type could possibly have an |
| argument of a given type.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></h3> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li class="blockList"> |
| <section class="constructorDetails"><a id="constructor.detail"> |
| <!-- --> |
| </a> |
| <h2>Constructor Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="<init>()">ReflectUtil</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">ReflectUtil</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li class="blockList"> |
| <section class="methodDetails"><a id="method.detail"> |
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| </a> |
| <h2>Method Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getByteBufferReadMethod(java.lang.Class)">getByteBufferReadMethod</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></span> <span class="memberName">getByteBufferReadMethod</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</span></div> |
| <div class="block">Uses reflection to find the correct java.nio.ByteBuffer "absolute get" |
| method for a given primitive type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>clazz</code> - the Class object representing the primitive type</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>corresponding method</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getByteBufferWriteMethod(java.lang.Class)">getByteBufferWriteMethod</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></span> <span class="memberName">getByteBufferWriteMethod</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> clazz)</span></div> |
| <div class="block">Uses reflection to find the correct java.nio.ByteBuffer "absolute put" |
| method for a given primitive type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>clazz</code> - the Class object representing the primitive type</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>corresponding method</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getBoxingClass(java.lang.Class)">getBoxingClass</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a></span> <span class="memberName">getBoxingClass</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> primitiveClass)</span></div> |
| <div class="block">Gets the Java boxing class for a primitive class.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>primitiveClass</code> - representative class for primitive (e.g. |
| java.lang.Integer.TYPE)</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>corresponding boxing Class (e.g. java.lang.Integer)</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getUnqualifiedClassName(java.lang.Class)">getUnqualifiedClassName</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">getUnqualifiedClassName</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> c)</span></div> |
| <div class="block">Gets the name of a class with no package qualifiers; if it's an inner |
| class, it will still be qualified by the containing class (X$Y).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>c</code> - the class of interest</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the unqualified name</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getUnmangledMethodName(java.lang.Class,java.lang.String,java.lang.Class[])">getUnmangledMethodName</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">getUnmangledMethodName</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> declaringClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>[] paramTypes)</span></div> |
| <div class="block">Composes a string representing a human-readable method name (with neither |
| exception nor return type information).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>declaringClass</code> - class on which method is defined</dd> |
| <dd><code>methodName</code> - simple name of method without signature</dd> |
| <dd><code>paramTypes</code> - method parameter types</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>unmangled method name</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getUnmangledMethodName(java.lang.reflect.Method)">getUnmangledMethodName</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">getUnmangledMethodName</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method)</span></div> |
| <div class="block">Composes a string representing a human-readable method name (with neither |
| exception nor return type information).</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>method</code> - method whose name is to be generated</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>unmangled method name</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="invokeVisitor(org.apache.calcite.util.ReflectiveVisitor,java.lang.Object,java.lang.Class,java.lang.String)">invokeVisitor</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType">boolean</span> <span class="memberName">invokeVisitor</span>​(<span class="arguments"><a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a> visitor, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a> visitee, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a> hierarchyRoot, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName)</span></div> |
| <div class="block">Implements the <a href="Glossary.html#VISITOR_PATTERN"><code>Glossary.VISITOR_PATTERN</code></a> via |
| reflection. The basic technique is taken from <a href="http://www.javaworld.com/javaworld/javatips/jw-javatip98.html">a |
| Javaworld article</a>. For an example of how to use it, see |
| <code>ReflectVisitorTest</code>. |
| |
| <p>Visit method lookup follows the same rules as if |
| compile-time resolution for VisitorClass.visit(VisiteeClass) were |
| performed. An ambiguous match due to multiple interface inheritance |
| results in an IllegalArgumentException. A non-match is indicated by |
| returning false.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>visitor</code> - object whose visit method is to be invoked</dd> |
| <dd><code>visitee</code> - object to be passed as a parameter to the visit |
| method</dd> |
| <dd><code>hierarchyRoot</code> - if non-null, visitor method will only be invoked if |
| it takes a parameter whose type is a subtype of |
| hierarchyRoot</dd> |
| <dd><code>visitMethodName</code> - name of visit method, e.g. "visit"</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>true if a matching visit method was found and invoked</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String)">lookupVisitMethod</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></span> <span class="memberName">lookupVisitMethod</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visitorClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visiteeClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName)</span></div> |
| <div class="block">Looks up a visit method.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>visitorClass</code> - class of object whose visit method is to be invoked</dd> |
| <dd><code>visiteeClass</code> - class of object to be passed as a parameter to the |
| visit method</dd> |
| <dd><code>visitMethodName</code> - name of visit method</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>method found, or null if none found</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String,java.util.List)">lookupVisitMethod</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a></span> <span class="memberName">lookupVisitMethod</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visitorClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> visiteeClass, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> visitMethodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>> additionalParameterTypes)</span></div> |
| <div class="block">Looks up a visit method taking additional parameters beyond the |
| overloaded visitee type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>visitorClass</code> - class of object whose visit method is to be |
| invoked</dd> |
| <dd><code>visiteeClass</code> - class of object to be passed as a parameter |
| to the visit method</dd> |
| <dd><code>visitMethodName</code> - name of visit method</dd> |
| <dd><code>additionalParameterTypes</code> - list of additional parameter types</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>method found, or null if none found</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="#createDispatcher(java.lang.Class,java.lang.Class)"><code>createDispatcher(Class, Class)</code></a></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="createDispatcher(java.lang.Class,java.lang.Class)">createDispatcher</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="typeParameters"><R extends <a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a>,​ |
| E></span> |
| <span class="returnType"><a href="ReflectiveVisitDispatcher.html" title="interface in org.apache.calcite.util">ReflectiveVisitDispatcher</a><R,​E></span> <span class="memberName">createDispatcher</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><R> visitorBaseClazz, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><E> visiteeBaseClazz)</span></div> |
| <div class="block">Creates a dispatcher for calls to <a href="#lookupVisitMethod(java.lang.Class,java.lang.Class,java.lang.String)"><code>lookupVisitMethod(java.lang.Class<?>, java.lang.Class<?>, java.lang.String)</code></a>. The |
| dispatcher caches methods between invocations.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>visitorBaseClazz</code> - Visitor base class</dd> |
| <dd><code>visiteeBaseClazz</code> - Visitee base class</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>cache of methods</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="createMethodDispatcher(java.lang.Class,org.apache.calcite.util.ReflectiveVisitor,java.lang.String,java.lang.Class,java.lang.Class...)">createMethodDispatcher</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="typeParameters"><E,​ |
| T></span> <span class="returnType"><a href="ReflectUtil.MethodDispatcher.html" title="interface in org.apache.calcite.util">ReflectUtil.MethodDispatcher</a><T></span> <span class="memberName">createMethodDispatcher</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><T> returnClazz, |
| <a href="ReflectiveVisitor.html" title="interface in org.apache.calcite.util">ReflectiveVisitor</a> visitor, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><E> arg0Clazz, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a>... otherArgClasses)</span></div> |
| <div class="block">Creates a dispatcher for calls to a single multi-method on a particular |
| object. |
| |
| <p>Calls to that multi-method are resolved by looking for a method on |
| the runtime type of that object, with the required name, and with |
| the correct type or a subclass for the first argument, and precisely the |
| same types for other arguments. |
| |
| <p>For instance, a dispatcher created for the method |
| |
| <blockquote>String foo(Vehicle, int, List)</blockquote> |
| |
| <p>could be used to call the methods |
| |
| <blockquote>String foo(Car, int, List)<br> |
| String foo(Bus, int, List)</blockquote> |
| |
| <p>(because Car and Bus are subclasses of Vehicle, and they occur in the |
| polymorphic first argument) but not the method |
| |
| <blockquote>String foo(Car, int, ArrayList)</blockquote> |
| |
| <p>(only the first argument is polymorphic). |
| |
| <p>You must create an implementation of the method for the base class. |
| Otherwise throws <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/IllegalArgumentException.html?is-external=true" title="class or interface in java.lang" class="externalLink"><code>IllegalArgumentException</code></a>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>returnClazz</code> - Return type of method</dd> |
| <dd><code>visitor</code> - Object on which to invoke the method</dd> |
| <dd><code>methodName</code> - Name of method</dd> |
| <dd><code>arg0Clazz</code> - Base type of argument zero</dd> |
| <dd><code>otherArgClasses</code> - Types of remaining arguments</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getParameterName(java.lang.reflect.Method,int)">getParameterName</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a></span> <span class="memberName">getParameterName</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method, |
| int i)</span></div> |
| <div class="block">Derives the name of the <code>i</code>th parameter of a method.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="isParameterOptional(java.lang.reflect.Method,int)">isParameterOptional</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType">boolean</span> <span class="memberName">isParameterOptional</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/reflect/Method.html?is-external=true" title="class or interface in java.lang.reflect" class="externalLink">Method</a> method, |
| int i)</span></div> |
| <div class="block">Derives whether the <code>i</code>th parameter of a method is optional.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="mightBeAssignableFrom(java.lang.Class,java.lang.Class)">mightBeAssignableFrom</a></h3> |
| <div class="memberSignature"><span class="modifiers">public static</span> <span class="returnType">boolean</span> <span class="memberName">mightBeAssignableFrom</span>​(<span class="arguments"><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> parameterType, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Class.html?is-external=true" title="class or interface in java.lang" class="externalLink">Class</a><?> argumentType)</span></div> |
| <div class="block">Returns whether a parameter of a given type could possibly have an |
| argument of a given type. |
| |
| <p>For example, consider method |
| |
| <blockquote> |
| <code>foo(Object o, String s, int i, Number n, BigDecimal d</code> |
| </blockquote> |
| |
| <p>To which which of those parameters could I pass a value that is an |
| instance of <a href="https://docs.oracle.com/javase/9/docs/api/java/util/HashMap.html?is-external=true" title="class or interface in java.util" class="externalLink"><code>HashMap</code></a>? The answer: |
| |
| <ul> |
| <li><code>o</code> yes, |
| <li><code>s</code> no (<code>String</code> is a final class), |
| <li><code>i</code> no, |
| <li><code>n</code> yes (<code>Number</code> is an interface, and <code>HashMap</code> is |
| a non-final class, so I could create a sub-class of <code>HashMap</code> |
| that implements <code>Number</code>, |
| <li><code>d</code> yes (<code>BigDecimal</code> is a non-final class). |
| </ul></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </div> |
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