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| <div class="subTitle">org.apache.calcite.linq4j.tree</div> |
| <h2 title="类 Types" class="title">类 Types</h2> |
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| <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="java.lang中的类或接口">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.linq4j.tree.Types</li> |
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| <pre>public abstract class <span class="typeNameLabel">Types</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></pre> |
| <div class="block">Utilities for converting between <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类"><code>Expression</code></a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口"><code>Type</code></a> and |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口"><code>Class</code></a>.</div> |
| <dl> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../../org/apache/calcite/linq4j/tree/Primitive.html" title="org.apache.calcite.linq4j.tree中的枚举"><code>Primitive</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| </div> |
| <div class="summary"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ======== NESTED CLASS SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="nested.class.summary"> |
| <!-- --> |
| </a> |
| <h3>嵌套类概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="嵌套类概要表, 列表嵌套类和解释"> |
| <caption><span>嵌套类</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">类和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.ArrayType.html" title="org.apache.calcite.linq4j.tree中的类">Types.ArrayType</a></span></code> |
| <div class="block">Array type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.MapType.html" title="org.apache.calcite.linq4j.tree中的类">Types.MapType</a></span></code> |
| <div class="block">Map type.</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.RecordField.html" title="org.apache.calcite.linq4j.tree中的接口">Types.RecordField</a></span></code> |
| <div class="block">Field that belongs to a record.</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>static interface </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.RecordType.html" title="org.apache.calcite.linq4j.tree中的接口">Types.RecordType</a></span></code> |
| <div class="block">Base class for record-like types that do not mapped to (currently |
| loaded) Java <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口"><code>Class</code></a> objects.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.summary"> |
| <!-- --> |
| </a> |
| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">静态方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#allAssignable-boolean-java.lang.Class:A-java.lang.Class:A-">allAssignable</a></span>(boolean varArgs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[] parameterTypes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[] argumentTypes)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#box-java.lang.reflect.Type-">box</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#castIfNecessary-java.lang.reflect.Type-org.apache.calcite.linq4j.tree.Expression-">castIfNecessary</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> returnType, |
| <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a> expression)</code> |
| <div class="block">Wraps an expression in a cast if it is not already of the desired type, |
| or cannot be implicitly converted to it.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#discard-java.lang.Object-">discard</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a> o)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/linq4j/tree/PseudoField.html" title="org.apache.calcite.linq4j.tree中的接口">PseudoField</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#field-java.lang.reflect.Field-">field</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a> field)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#getComponentType-java.lang.reflect.Type-">getComponentType</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> |
| <div class="block">Returns the component type of an array.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#getElementType-java.lang.reflect.Type-">getElementType</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> |
| <div class="block">Returns the element type of a <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="java.util中的类或接口"><code>Collection</code></a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口"><code>Iterable</code></a> |
| (including <a href="../../../../../org/apache/calcite/linq4j/Queryable.html" title="org.apache.calcite.linq4j中的接口"><code>Queryable</code></a> and |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerable.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerable</code></a>), <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="java.util中的类或接口"><code>Iterator</code></a>, |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerator</code></a>, or an array.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#isArray-java.lang.reflect.Type-">isArray</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#isAssignableFrom-java.lang.reflect.Type-java.lang.reflect.Type-">isAssignableFrom</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type0, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="java.lang.reflect中的类或接口">Constructor</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#lookupConstructor-java.lang.reflect.Type-java.lang.Class...-">lookupConstructor</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>... argumentTypes)</code> |
| <div class="block">Finds a constructor of a given class that accepts a given set of |
| arguments.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#lookupField-java.lang.reflect.Type-java.lang.String-">lookupField</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> name)</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="java.lang.reflect中的类或接口">Method</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#lookupMethod-java.lang.Class-java.lang.String-java.lang.Class...-">lookupMethod</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a> clazz, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>... argumentTypes)</code> |
| <div class="block">Finds a method of a given name that accepts a given set of arguments.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#needTypeCast-java.lang.reflect.Type-java.lang.reflect.Type-">needTypeCast</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> fromType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> toType)</code> |
| <div class="block">When trying to cast/convert a <code>Type</code> to another <code>Type</code>, |
| it is necessary to pre-check whether the cast operation is needed.</div> |
| </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#nthField-int-java.lang.Class-">nthField</a></span>(int ordinal, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a> clazz)</code> </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../org/apache/calcite/linq4j/tree/PseudoField.html" title="org.apache.calcite.linq4j.tree中的接口">PseudoField</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#nthField-int-java.lang.reflect.Type-">nthField</a></span>(int ordinal, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> clazz)</code> </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#of-java.lang.reflect.Type-java.lang.reflect.Type...-">of</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a>... typeArguments)</code> |
| <div class="block">Creates a type with generic parameters.</div> |
| </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#stripGenerics-java.lang.reflect.Type-">stripGenerics</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#toClass-java.lang.reflect.Type-">toClass</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#toClassArray-java.lang.Iterable-">toClassArray</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a>> arguments)</code> </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/calcite/linq4j/tree/Types.html#unbox-java.lang.reflect.Type-">unbox</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</code> </td> |
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| <h3>从类继承的方法 java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
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| <h3>方法详细资料</h3> |
| <a name="of-java.lang.reflect.Type-java.lang.reflect.Type...-"> |
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| <h4>of</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> of(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a>... typeArguments)</pre> |
| <div class="block">Creates a type with generic parameters.</div> |
| </li> |
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| <a name="getElementType-java.lang.reflect.Type-"> |
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| <h4>getElementType</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> getElementType(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
| <div class="block">Returns the element type of a <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="java.util中的类或接口"><code>Collection</code></a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口"><code>Iterable</code></a> |
| (including <a href="../../../../../org/apache/calcite/linq4j/Queryable.html" title="org.apache.calcite.linq4j中的接口"><code>Queryable</code></a> and |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerable.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerable</code></a>), <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Iterator.html?is-external=true" title="java.util中的类或接口"><code>Iterator</code></a>, |
| <a href="../../../../../org/apache/calcite/linq4j/Enumerator.html" title="org.apache.calcite.linq4j中的接口"><code>Enumerator</code></a>, or an array. |
| |
| <p>Returns null if the type is not one of these.</p></div> |
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| <h4>toClass</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a> toClass(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
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| <h4>toClassArray</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[] toClassArray(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Iterable.html?is-external=true" title="java.lang中的类或接口">Iterable</a><? extends <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a>> arguments)</pre> |
| </li> |
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| <h4>getComponentType</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> getComponentType(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
| <div class="block">Returns the component type of an array.</div> |
| </li> |
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| <h4>box</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> box(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
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| <ul class="blockList"> |
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| <h4>unbox</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> unbox(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
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| <h4>isAssignableFrom</h4> |
| <pre>public static boolean isAssignableFrom(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type0, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
| </li> |
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| <h4>isArray</h4> |
| <pre>public static boolean isArray(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
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| <h4>nthField</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a> nthField(int ordinal, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a> clazz)</pre> |
| </li> |
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| <h4>nthField</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/linq4j/tree/PseudoField.html" title="org.apache.calcite.linq4j.tree中的接口">PseudoField</a> nthField(int ordinal, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> clazz)</pre> |
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| <pre>public static boolean allAssignable(boolean varArgs, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[] parameterTypes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>[] argumentTypes)</pre> |
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| <h4>lookupMethod</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Method.html?is-external=true" title="java.lang.reflect中的类或接口">Method</a> lookupMethod(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a> clazz, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> methodName, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>... argumentTypes)</pre> |
| <div class="block">Finds a method of a given name that accepts a given set of arguments. |
| Includes in its search inherited methods and methods with wider argument |
| types.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>clazz</code> - Class against which method is invoked</dd> |
| <dd><code>methodName</code> - Name of method</dd> |
| <dd><code>argumentTypes</code> - Types of arguments</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>A method with the given name that matches the arguments given</dd> |
| <dt><span class="throwsLabel">抛出:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/RuntimeException.html?is-external=true" title="java.lang中的类或接口">RuntimeException</a></code> - if method not found</dd> |
| </dl> |
| </li> |
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| <a name="lookupConstructor-java.lang.reflect.Type-java.lang.Class...-"> |
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| <h4>lookupConstructor</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Constructor.html?is-external=true" title="java.lang.reflect中的类或接口">Constructor</a> lookupConstructor(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html?is-external=true" title="java.lang中的类或接口">Class</a>... argumentTypes)</pre> |
| <div class="block">Finds a constructor of a given class that accepts a given set of |
| arguments. Includes in its search methods with wider argument types.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>type</code> - Class against which method is invoked</dd> |
| <dd><code>argumentTypes</code> - Types of arguments</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>A method with the given name that matches the arguments given</dd> |
| <dt><span class="throwsLabel">抛出:</span></dt> |
| <dd><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/RuntimeException.html?is-external=true" title="java.lang中的类或接口">RuntimeException</a></code> - if method not found</dd> |
| </dl> |
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| <a name="lookupField-java.lang.reflect.Type-java.lang.String-"> |
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| <h4>lookupField</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a> lookupField(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a> name)</pre> |
| </li> |
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| <h4>discard</h4> |
| <pre>public static void discard(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a> o)</pre> |
| </li> |
| </ul> |
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| <h4>castIfNecessary</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a> castIfNecessary(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> returnType, |
| <a href="../../../../../org/apache/calcite/linq4j/tree/Expression.html" title="org.apache.calcite.linq4j.tree中的类">Expression</a> expression)</pre> |
| <div class="block">Wraps an expression in a cast if it is not already of the desired type, |
| or cannot be implicitly converted to it.</div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>returnType</code> - Desired type</dd> |
| <dd><code>expression</code> - Expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>Expression of desired type</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="needTypeCast-java.lang.reflect.Type-java.lang.reflect.Type-"> |
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| <h4>needTypeCast</h4> |
| <pre>public static boolean needTypeCast(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> fromType, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> toType)</pre> |
| <div class="block">When trying to cast/convert a <code>Type</code> to another <code>Type</code>, |
| it is necessary to pre-check whether the cast operation is needed. |
| We summarize general exceptions, including: |
| |
| <ol> |
| <li>target Type <code>toType</code> equals with original Type <code>fromType</code></li> |
| <li>target Type can be assignable from original Type</li> |
| <li>target Type is an instance of <code>RecordType</code>, |
| since the mapping Java Class might not generated yet</li> |
| </ol></div> |
| <dl> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>fromType</code> - original type</dd> |
| <dd><code>toType</code> - target type</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>Whether a cast operation is needed</dd> |
| </dl> |
| </li> |
| </ul> |
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| <h4>field</h4> |
| <pre>public static <a href="../../../../../org/apache/calcite/linq4j/tree/PseudoField.html" title="org.apache.calcite.linq4j.tree中的接口">PseudoField</a> field(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html?is-external=true" title="java.lang.reflect中的类或接口">Field</a> field)</pre> |
| </li> |
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| <h4>stripGenerics</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> stripGenerics(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Type.html?is-external=true" title="java.lang.reflect中的类或接口">Type</a> type)</pre> |
| </li> |
| </ul> |
| </li> |
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