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<div class="subTitle">org.apache.beam.sdk.transforms</div>
<h2 title="Class Combine.SimpleCombineFn" class="title">Class Combine.SimpleCombineFn&lt;V&gt;</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">org.apache.beam.sdk.transforms.Combine.CombineFn</a>&lt;V,java.util.List&lt;V&gt;,V&gt;</li>
<li>
<ul class="inheritance">
<li><a href="../../../../../org/apache/beam/sdk/transforms/Combine.IterableCombineFn.html" title="class in org.apache.beam.sdk.transforms">org.apache.beam.sdk.transforms.Combine.IterableCombineFn</a>&lt;V&gt;</li>
<li>
<ul class="inheritance">
<li>org.apache.beam.sdk.transforms.Combine.SimpleCombineFn&lt;V&gt;</li>
</ul>
</li>
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</li>
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<div class="description">
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<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, <a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html" title="interface in org.apache.beam.sdk.transforms">CombineFnBase.GlobalCombineFn</a>&lt;V,java.util.List&lt;V&gt;,V&gt;, <a href="../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display">HasDisplayData</a>, org.apache.beam.sdk.util.NameUtils.NameOverride</dd>
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<dl>
<dt>Enclosing class:</dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/Combine.html" title="class in org.apache.beam.sdk.transforms">Combine</a></dd>
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<div class="block"><span class="deprecatedLabel">Deprecated.</span></div>
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<pre>@Deprecated
public static class <span class="typeNameLabel">Combine.SimpleCombineFn&lt;V&gt;</span>
extends <a href="../../../../../org/apache/beam/sdk/transforms/Combine.IterableCombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.IterableCombineFn</a>&lt;V&gt;</pre>
<div class="block">Converts a <a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms"><code>SerializableFunction</code></a> from <code>Iterable&lt;V&gt;</code>s to <code>V</code>s into a simple
<a href="../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.CombineFn</code></a> over <code>V</code>s.
<p>@deprecated Use <a href="../../../../../org/apache/beam/sdk/transforms/Combine.IterableCombineFn.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.IterableCombineFn</code></a> or the more space efficient <a href="../../../../../org/apache/beam/sdk/transforms/Combine.BinaryCombineFn.html" title="class in org.apache.beam.sdk.transforms"><code>Combine.BinaryCombineFn</code></a> instead (which avoids buffering values).</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../serialized-form.html#org.apache.beam.sdk.transforms.Combine.SimpleCombineFn">Serialized Form</a></dd>
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<th class="colFirst" scope="col">Modifier</th>
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<td class="colFirst"><code>protected </code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html#SimpleCombineFn-org.apache.beam.sdk.transforms.SerializableFunction-">SimpleCombineFn</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;java.lang.Iterable&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="type parameter in Combine.SimpleCombineFn">V</a>&gt;,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="type parameter in Combine.SimpleCombineFn">V</a>&gt;&nbsp;combiner)</code>
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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>java.lang.reflect.TypeVariable&lt;?&gt;</code></td>
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<td class="colFirst"><code><a href="../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders">Coder</a>&lt;OutputT&gt;</code></td>
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<div class="block">Returns the <code>Coder</code> to use by default for output <code>OutputT</code> values, or null if it
is not able to be inferred.</div>
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<tr id="i3" class="rowColor">
<td class="colFirst"><code>java.lang.String</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html#getIncompatibleGlobalWindowErrorMessage--">getIncompatibleGlobalWindowErrorMessage</a></span>()</code>
<div class="block">Returns the error message for not supported default values in Combine.globally().</div>
</td>
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<td class="colFirst"><code>java.lang.reflect.TypeVariable&lt;?&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html#getInputTVariable--">getInputTVariable</a></span>()</code>
<div class="block">Returns the <code>TypeVariable</code> of <code>InputT</code>.</div>
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</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>java.lang.reflect.TypeVariable&lt;?&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html#getOutputTVariable--">getOutputTVariable</a></span>()</code>
<div class="block">Returns the <code>TypeVariable</code> of <code>OutputT</code>.</div>
</td>
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<td class="colFirst"><code>static &lt;V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.SimpleCombineFn</a>&lt;V&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html#of-org.apache.beam.sdk.transforms.SerializableFunction-">of</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;java.lang.Iterable&lt;V&gt;,V&gt;&nbsp;combiner)</code>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Returns a <code>CombineFn</code> that uses the given <code>SerializableFunction</code> to combine
values.</div>
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<h4>SimpleCombineFn</h4>
<pre>protected&nbsp;SimpleCombineFn(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;java.lang.Iterable&lt;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="type parameter in Combine.SimpleCombineFn">V</a>&gt;,<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="type parameter in Combine.SimpleCombineFn">V</a>&gt;&nbsp;combiner)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
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<h4>of</h4>
<pre>public static&nbsp;&lt;V&gt;&nbsp;<a href="../../../../../org/apache/beam/sdk/transforms/Combine.SimpleCombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.SimpleCombineFn</a>&lt;V&gt;&nbsp;of(<a href="../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;java.lang.Iterable&lt;V&gt;,V&gt;&nbsp;combiner)</pre>
<div class="block"><span class="deprecatedLabel">Deprecated.</span>&nbsp;</div>
<div class="block">Returns a <code>CombineFn</code> that uses the given <code>SerializableFunction</code> to combine
values.</div>
</li>
</ul>
<a name="getAccumulatorCoder-org.apache.beam.sdk.coders.CoderRegistry-org.apache.beam.sdk.coders.Coder-">
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<h4>getAccumulatorCoder</h4>
<pre>public&nbsp;<a href="../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders">Coder</a>&lt;AccumT&gt;&nbsp;getAccumulatorCoder(<a href="../../../../../org/apache/beam/sdk/coders/CoderRegistry.html" title="class in org.apache.beam.sdk.coders">CoderRegistry</a>&nbsp;registry,
<a href="../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders">Coder</a>&lt;InputT&gt;&nbsp;inputCoder)
throws <a href="../../../../../org/apache/beam/sdk/coders/CannotProvideCoderException.html" title="class in org.apache.beam.sdk.coders">CannotProvideCoderException</a></pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html#getAccumulatorCoder-org.apache.beam.sdk.coders.CoderRegistry-org.apache.beam.sdk.coders.Coder-">CombineFnBase.GlobalCombineFn</a></code></span></div>
<div class="block">Returns the <code>Coder</code> to use for accumulator <code>AccumT</code> values, or null if it is not
able to be inferred.
<p>By default, uses the knowledge of the <code>Coder</code> being used for <code>InputT</code> values
and the enclosing <code>Pipeline</code>'s <code>CoderRegistry</code> to try to infer the Coder for
<code>AccumT</code> values.
<p>This is the Coder used to send data through a communication-intensive shuffle step, so a
compact and efficient representation may have significant performance benefits.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html#getAccumulatorCoder-org.apache.beam.sdk.coders.CoderRegistry-org.apache.beam.sdk.coders.Coder-">getAccumulatorCoder</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html" title="interface in org.apache.beam.sdk.transforms">CombineFnBase.GlobalCombineFn</a>&lt;InputT,AccumT,OutputT&gt;</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/coders/CannotProvideCoderException.html" title="class in org.apache.beam.sdk.coders">CannotProvideCoderException</a></code></dd>
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<pre>public&nbsp;<a href="../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders">Coder</a>&lt;OutputT&gt;&nbsp;getDefaultOutputCoder(<a href="../../../../../org/apache/beam/sdk/coders/CoderRegistry.html" title="class in org.apache.beam.sdk.coders">CoderRegistry</a>&nbsp;registry,
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<div class="block"><span class="descfrmTypeLabel">Description copied from interface:&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html#getDefaultOutputCoder-org.apache.beam.sdk.coders.CoderRegistry-org.apache.beam.sdk.coders.Coder-">CombineFnBase.GlobalCombineFn</a></code></span></div>
<div class="block">Returns the <code>Coder</code> to use by default for output <code>OutputT</code> values, or null if it
is not able to be inferred.
<p>By default, uses the knowledge of the <code>Coder</code> being used for input <code>InputT</code>
values and the enclosing <code>Pipeline</code>'s <code>CoderRegistry</code> to try to infer the Coder
for <code>OutputT</code> values.</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html#getDefaultOutputCoder-org.apache.beam.sdk.coders.CoderRegistry-org.apache.beam.sdk.coders.Coder-">getDefaultOutputCoder</a></code>&nbsp;in interface&nbsp;<code><a href="../../../../../org/apache/beam/sdk/transforms/CombineFnBase.GlobalCombineFn.html" title="interface in org.apache.beam.sdk.transforms">CombineFnBase.GlobalCombineFn</a>&lt;InputT,AccumT,OutputT&gt;</code></dd>
<dt><span class="throwsLabel">Throws:</span></dt>
<dd><code><a href="../../../../../org/apache/beam/sdk/coders/CannotProvideCoderException.html" title="class in org.apache.beam.sdk.coders">CannotProvideCoderException</a></code></dd>
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<pre>public&nbsp;java.lang.String&nbsp;getIncompatibleGlobalWindowErrorMessage()</pre>
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<div class="block">Returns the error message for not supported default values in Combine.globally().</div>
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<pre>public&nbsp;java.lang.reflect.TypeVariable&lt;?&gt;&nbsp;getInputTVariable()</pre>
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<pre>public&nbsp;java.lang.reflect.TypeVariable&lt;?&gt;&nbsp;getAccumTVariable()</pre>
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<pre>public&nbsp;java.lang.reflect.TypeVariable&lt;?&gt;&nbsp;getOutputTVariable()</pre>
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