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<div class="subTitle">org.apache.beam.sdk.values</div>
<h2 title="Class TypeDescriptors" class="title">Class TypeDescriptors</h2>
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<li>java.lang.Object</li>
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<ul class="inheritance">
<li>org.apache.beam.sdk.values.TypeDescriptors</li>
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<pre>public class <span class="typeNameLabel">TypeDescriptors</span>
extends java.lang.Object</pre>
<div class="block">A utility class for creating <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> objects for different types, such as Java
primitive types, containers and <a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values"><code>KVs</code></a> of other <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> objects, and
extracting type variables of parameterized types (e.g. extracting the <code>OutputT</code> type
variable of a <code>DoFn&lt;InputT, OutputT&gt;</code>).</div>
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<caption><span>Nested Classes</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Class and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static interface&nbsp;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="interface in org.apache.beam.sdk.values">TypeDescriptors.TypeVariableExtractor</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="type parameter in TypeDescriptors.TypeVariableExtractor">InputT</a>,<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="type parameter in TypeDescriptors.TypeVariableExtractor">OutputT</a>&gt;</span></code>
<div class="block">A helper interface for use with <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#extractFromTypeParameters-T-java.lang.Class-org.apache.beam.sdk.values.TypeDescriptors.TypeVariableExtractor-"><code>extractFromTypeParameters(Object, Class,
TypeVariableExtractor)</code></a>.</div>
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<th class="colOne" scope="col">Constructor and Description</th>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#TypeDescriptors--">TypeDescriptors</a></span>()</code>&nbsp;</td>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.math.BigDecimal&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#bigdecimals--">bigdecimals</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for BigDecimal.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.math.BigInteger&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#bigintegers--">bigintegers</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for BigInteger.</div>
</td>
</tr>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Boolean&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#booleans--">booleans</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Boolean.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Byte&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#bytes--">bytes</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Byte.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Character&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#characters--">characters</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Character.</div>
</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Double&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#doubles--">doubles</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Double.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>static &lt;T,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;V&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#extractFromTypeParameters-T-java.lang.Class-org.apache.beam.sdk.values.TypeDescriptors.TypeVariableExtractor-">extractFromTypeParameters</a></span>(T&nbsp;instance,
java.lang.Class&lt;? super T&gt;&nbsp;supertype,
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="interface in org.apache.beam.sdk.values">TypeDescriptors.TypeVariableExtractor</a>&lt;T,V&gt;&nbsp;extractor)</code>
<div class="block">Extracts a type from the actual type parameters of a parameterized class, subject to Java type
erasure.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>static &lt;T,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;V&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#extractFromTypeParameters-org.apache.beam.sdk.values.TypeDescriptor-java.lang.Class-org.apache.beam.sdk.values.TypeDescriptors.TypeVariableExtractor-">extractFromTypeParameters</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;T&gt;&nbsp;type,
java.lang.Class&lt;? super T&gt;&nbsp;supertype,
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="interface in org.apache.beam.sdk.values">TypeDescriptors.TypeVariableExtractor</a>&lt;T,V&gt;&nbsp;extractor)</code>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#extractFromTypeParameters-T-java.lang.Class-org.apache.beam.sdk.values.TypeDescriptors.TypeVariableExtractor-"><code>extractFromTypeParameters(Object, Class, TypeVariableExtractor)</code></a>, but takes a
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> of the instance being analyzed rather than the instance itself.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Float&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#floats--">floats</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Float.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code>static &lt;InputT,OutputT&gt;<br><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.Contextful.Fn-">inputOf</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/Contextful.Fn.html" title="interface in org.apache.beam.sdk.transforms">Contextful.Fn</a>&lt;InputT,OutputT&gt;&nbsp;fn)</code>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>inputOf(ProcessFunction)</code></a> but for <code>Contextful.Fn</code>.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code>static &lt;InputT,OutputT&gt;<br><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.ProcessFunction-">inputOf</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms">ProcessFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</code>
<div class="block">Returns a type descriptor for the input of the given <a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms"><code>ProcessFunction</code></a>, subject to Java
type erasure: may contain unresolved type variables if the type was erased.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code>static &lt;InputT,OutputT&gt;<br><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.SerializableFunction-">inputOf</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</code>
<div class="block">Binary compatibility adapter for <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>inputOf(ProcessFunction)</code></a>.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Integer&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#integers--">integers</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Integer.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code>static &lt;T&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Iterable&lt;T&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#iterables-org.apache.beam.sdk.values.TypeDescriptor-">iterables</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;T&gt;&nbsp;iterable)</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Iterable</code>.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code>static &lt;K,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;<a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values">KV</a>&lt;K,V&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#kvs-org.apache.beam.sdk.values.TypeDescriptor-org.apache.beam.sdk.values.TypeDescriptor-">kvs</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;K&gt;&nbsp;key,
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;V&gt;&nbsp;value)</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values"><code>KV</code></a>.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code>static &lt;T&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.util.List&lt;T&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#lists-org.apache.beam.sdk.values.TypeDescriptor-">lists</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;T&gt;&nbsp;element)</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>List</code>.</div>
</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Long&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#longs--">longs</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Long.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code>static &lt;K,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.util.Map&lt;K,V&gt;&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#maps-org.apache.beam.sdk.values.TypeDescriptor-org.apache.beam.sdk.values.TypeDescriptor-">maps</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;K&gt;&nbsp;keyType,
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<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Map</code>.</div>
</td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Void&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#nulls--">nulls</a></span>()</code>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for nulls/Void.</div>
</td>
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<tr id="i19" class="rowColor">
<td class="colFirst"><code>static &lt;InputT,OutputT&gt;<br><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;OutputT&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#outputOf-org.apache.beam.sdk.transforms.Contextful.Fn-">outputOf</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/Contextful.Fn.html" title="interface in org.apache.beam.sdk.transforms">Contextful.Fn</a>&lt;InputT,OutputT&gt;&nbsp;fn)</code>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#outputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>outputOf(ProcessFunction)</code></a> but for <code>Contextful.Fn</code>.</div>
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<td class="colFirst"><code>static &lt;InputT,OutputT&gt;<br><a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;OutputT&gt;</code></td>
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<td class="colFirst"><code>static &lt;T&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.util.Set&lt;T&gt;&gt;</code></td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.String&gt;</code></td>
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<td class="colFirst"><code>static <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Void&gt;</code></td>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Integer</dd>
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new TypeDescriptor&lt;Long&gt;() {};
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<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Long</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Short</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for BigDecimal</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for BigInteger</dd>
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new TypeDescriptor&lt;String&gt;() {};
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for String</dd>
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new TypeDescriptor&lt;Character&gt;() {};
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Character</dd>
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new TypeDescriptor&lt;Byte&gt;() {};
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<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for Byte</dd>
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<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for nulls/Void. This is the equivalent of:
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new TypeDescriptor&lt;Void&gt;() {};
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<dl>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for nulls/Void</dd>
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<p>Example of use:
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PCollection&lt;String&gt; words = ...;
PCollection&lt;KV&lt;String, String&gt;&gt; words = words.apply(FlatMapElements
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>value</code> - The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for the value</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <a href="../../../../../org/apache/beam/sdk/values/KV.html" title="class in org.apache.beam.sdk.values"><code>KV</code></a></dd>
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<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Set</code>. This is the equivalent of:
<pre>
new TypeDescriptor&lt;Set&lt;E&gt;&gt;() {};
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<p>Example of use:
<pre><code>
PCollection&lt;String&gt; words = ...;
PCollection&lt;Set&lt;String&gt;&gt; words = words.apply(FlatMapElements
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>element</code> - The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for the set</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Set</code></dd>
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<pre>public static&nbsp;&lt;K,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.util.Map&lt;K,V&gt;&gt;&nbsp;maps(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;K&gt;&nbsp;keyType,
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<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>List</code>. This is the equivalent of:
<pre>
new TypeDescriptor&lt;List&lt;E&gt;&gt;() {};
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<p>Example of use:
<pre><code>
PCollection&lt;String&gt; words = ...;
PCollection&lt;List&lt;String&gt;&gt; words = words.apply(FlatMapElements
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<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>element</code> - The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for the list</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>List</code></dd>
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<pre>public static&nbsp;&lt;T&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Iterable&lt;T&gt;&gt;&nbsp;iterables(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;T&gt;&nbsp;iterable)</pre>
<div class="block">The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Iterable</code>. This is the equivalent of:
<pre>
new TypeDescriptor&lt;Iterable&lt;E&gt;&gt;() {};
</pre>
<p>Example of use:
<pre><code>
PCollection&lt;String&gt; words = ...;
PCollection&lt;Iterable&lt;String&gt;&gt; words = words.apply(FlatMapElements
.into(TypeDescriptors.iterables(TypeDescriptors.strings()))
.via(...));
</code></pre></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>iterable</code> - The <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for the iterable</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for <code>Iterable</code></dd>
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<pre>public static&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;java.lang.Void&gt;&nbsp;voids()</pre>
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<pre>public static&nbsp;&lt;T,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;V&gt;&nbsp;extractFromTypeParameters(T&nbsp;instance,
java.lang.Class&lt;? super T&gt;&nbsp;supertype,
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="interface in org.apache.beam.sdk.values">TypeDescriptors.TypeVariableExtractor</a>&lt;T,V&gt;&nbsp;extractor)</pre>
<div class="block">Extracts a type from the actual type parameters of a parameterized class, subject to Java type
erasure. The type to extract is specified in a way that is safe w.r.t. changing the type
signature of the parameterized class, as opposed to specifying the name or index of a type
variable.
<p>Example of use:
<pre><code>
class Foo&lt;BarT&gt; {
private ProcessFunction&lt;BarT, String&gt; fn;
TypeDescriptor&lt;BarT&gt; inferBarTypeDescriptorFromFn() {
return TypeDescriptors.extractFromTypeParameters(
fn,
ProcessFunction.class,
// The actual type of "fn" is matched against the input type of the extractor,
// and the obtained values of type variables of the superclass are substituted
// into the output type of the extractor.
new TypeVariableExtractor&lt;ProcessFunction&lt;BarT, String&gt;, BarT&gt;() {});
}
}
</code></pre></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>instance</code> - The object being analyzed</dd>
<dd><code>supertype</code> - Parameterized superclass of interest</dd>
<dd><code>extractor</code> - A class for specifying the type to extract from the supertype</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>A <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> for the actual value of the result type of the extractor,
potentially containing unresolved type variables if the type was erased.</dd>
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<pre>public static&nbsp;&lt;T,V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;V&gt;&nbsp;extractFromTypeParameters(<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;T&gt;&nbsp;type,
java.lang.Class&lt;? super T&gt;&nbsp;supertype,
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.TypeVariableExtractor.html" title="interface in org.apache.beam.sdk.values">TypeDescriptors.TypeVariableExtractor</a>&lt;T,V&gt;&nbsp;extractor)</pre>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#extractFromTypeParameters-T-java.lang.Class-org.apache.beam.sdk.values.TypeDescriptors.TypeVariableExtractor-"><code>extractFromTypeParameters(Object, Class, TypeVariableExtractor)</code></a>, but takes a
<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values"><code>TypeDescriptor</code></a> of the instance being analyzed rather than the instance itself.</div>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;&nbsp;inputOf(<a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms">ProcessFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Returns a type descriptor for the input of the given <a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms"><code>ProcessFunction</code></a>, subject to Java
type erasure: may contain unresolved type variables if the type was erased.</div>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;&nbsp;inputOf(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Binary compatibility adapter for <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>inputOf(ProcessFunction)</code></a>.</div>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;OutputT&gt;&nbsp;outputOf(<a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms">ProcessFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Returns a type descriptor for the output of the given <a href="../../../../../org/apache/beam/sdk/transforms/ProcessFunction.html" title="interface in org.apache.beam.sdk.transforms"><code>ProcessFunction</code></a>, subject to Java
type erasure: may contain unresolved type variables if the type was erased.</div>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;OutputT&gt;&nbsp;outputOf(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Binary compatibility adapter for <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#outputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>outputOf(ProcessFunction)</code></a>.</div>
</li>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;InputT&gt;&nbsp;inputOf(<a href="../../../../../org/apache/beam/sdk/transforms/Contextful.Fn.html" title="interface in org.apache.beam.sdk.transforms">Contextful.Fn</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#inputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>inputOf(ProcessFunction)</code></a> but for <code>Contextful.Fn</code>.</div>
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<pre>public static&nbsp;&lt;InputT,OutputT&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/values/TypeDescriptor.html" title="class in org.apache.beam.sdk.values">TypeDescriptor</a>&lt;OutputT&gt;&nbsp;outputOf(<a href="../../../../../org/apache/beam/sdk/transforms/Contextful.Fn.html" title="interface in org.apache.beam.sdk.transforms">Contextful.Fn</a>&lt;InputT,OutputT&gt;&nbsp;fn)</pre>
<div class="block">Like <a href="../../../../../org/apache/beam/sdk/values/TypeDescriptors.html#outputOf-org.apache.beam.sdk.transforms.ProcessFunction-"><code>outputOf(ProcessFunction)</code></a> but for <code>Contextful.Fn</code>.</div>
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