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<div class="subTitle">org.apache.beam.sdk.schemas.transforms</div>
<h2 title="Class Group.AggregateCombiner" class="title">Class Group.AggregateCombiner&lt;InputT&gt;</h2>
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<li>java.lang.Object</li>
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<li><a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">org.apache.beam.sdk.transforms.PTransform</a>&lt;<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;InputT&gt;,<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../../org/apache/beam/sdk/values/Row.html" title="class in org.apache.beam.sdk.values">Row</a>&gt;&gt;</li>
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<ul class="inheritance">
<li>org.apache.beam.sdk.schemas.transforms.Group.AggregateCombiner&lt;InputT&gt;</li>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
<dd><code>InputT</code> - </dd>
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<dl>
<dt>All Implemented Interfaces:</dt>
<dd>java.io.Serializable, <a href="../../../../../../org/apache/beam/sdk/transforms/display/HasDisplayData.html" title="interface in org.apache.beam.sdk.transforms.display">HasDisplayData</a></dd>
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<dl>
<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.ByFields.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.ByFields</a>, <a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.CombineFieldsByFields.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.CombineFieldsByFields</a>, <a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.CombineFieldsGlobally.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.CombineFieldsGlobally</a></dd>
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<dt>Enclosing class:</dt>
<dd><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.html" title="class in org.apache.beam.sdk.schemas.transforms">Group</a></dd>
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<pre>public abstract static class <span class="typeNameLabel">Group.AggregateCombiner&lt;InputT&gt;</span>
extends <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a>&lt;<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;InputT&gt;,<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;<a href="../../../../../../org/apache/beam/sdk/values/Row.html" title="class in org.apache.beam.sdk.values">Row</a>&gt;&gt;</pre>
<div class="block">a <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms"><code>PTransform</code></a> that does a combine using an aggregation built up by calls to
aggregateField and aggregateFields. The output of this transform will have a schema that is
determined by the output types of all the composed combiners.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.beam.sdk.schemas.transforms.Group.AggregateCombiner">Serialized Form</a></dd>
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<h3>Fields inherited from class&nbsp;org.apache.beam.sdk.transforms.<a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a></h3>
<code><a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#name">name</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#resourceHints">resourceHints</a></code></li>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html#AggregateCombiner--">AggregateCombiner</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="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<tr id="i0" class="altColor">
<td class="colFirst"><code>abstract &lt;CombineInputT,AccumT,CombineOutputT&gt;<br><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html#aggregateField-int-org.apache.beam.sdk.transforms.Combine.CombineFn-org.apache.beam.sdk.schemas.Schema.Field-">aggregateField</a></span>(int&nbsp;inputFieldId,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</code>
<div class="block">Build up an aggregation function over the input elements.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>abstract &lt;CombineInputT,AccumT,CombineOutputT&gt;<br><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html#aggregateField-java.lang.String-org.apache.beam.sdk.transforms.Combine.CombineFn-org.apache.beam.sdk.schemas.Schema.Field-">aggregateField</a></span>(java.lang.String&nbsp;inputFieldName,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</code>
<div class="block">Build up an aggregation function over the input elements.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>abstract &lt;CombineInputT,AccumT,CombineOutputT&gt;<br><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html#aggregateFieldsById-java.util.List-org.apache.beam.sdk.transforms.Combine.CombineFn-org.apache.beam.sdk.schemas.Schema.Field-">aggregateFieldsById</a></span>(java.util.List&lt;java.lang.Integer&gt;&nbsp;inputFieldIds,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</code>
<div class="block">Build up an aggregation function over the input elements by field id.</div>
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<h3>Methods inherited from class&nbsp;org.apache.beam.sdk.transforms.<a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html" title="class in org.apache.beam.sdk.transforms">PTransform</a></h3>
<code><a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#compose-org.apache.beam.sdk.transforms.SerializableFunction-">compose</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#compose-java.lang.String-org.apache.beam.sdk.transforms.SerializableFunction-">compose</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#expand-InputT-">expand</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getAdditionalInputs--">getAdditionalInputs</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder--">getDefaultOutputCoder</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder-InputT-">getDefaultOutputCoder</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getDefaultOutputCoder-InputT-org.apache.beam.sdk.values.PCollection-">getDefaultOutputCoder</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getKindString--">getKindString</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getName--">getName</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#getResourceHints--">getResourceHints</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#populateDisplayData-org.apache.beam.sdk.transforms.display.DisplayData.Builder-">populateDisplayData</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#setResourceHints-org.apache.beam.sdk.transforms.resourcehints.ResourceHints-">setResourceHints</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#toString--">toString</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#validate-org.apache.beam.sdk.options.PipelineOptions-">validate</a>, <a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#validate-org.apache.beam.sdk.options.PipelineOptions-java.util.Map-java.util.Map-">validate</a></code></li>
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<code>clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait</code></li>
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<h4>AggregateCombiner</h4>
<pre>public&nbsp;AggregateCombiner()</pre>
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<h4>aggregateField</h4>
<pre>public abstract&nbsp;&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;&nbsp;aggregateField(int&nbsp;inputFieldId,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</pre>
<div class="block">Build up an aggregation function over the input elements.
<p>This method specifies an aggregation over single field of the input. The union of all
calls to aggregateField and aggregateFields will determine the output schema.</div>
</li>
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<a name="aggregateField-java.lang.String-org.apache.beam.sdk.transforms.Combine.CombineFn-org.apache.beam.sdk.schemas.Schema.Field-">
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<h4>aggregateField</h4>
<pre>public abstract&nbsp;&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;&nbsp;aggregateField(java.lang.String&nbsp;inputFieldName,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</pre>
<div class="block">Build up an aggregation function over the input elements.
<p>This method specifies an aggregation over single field of the input. The union of all
calls to aggregateField and aggregateFields will determine the output schema.</div>
</li>
</ul>
<a name="aggregateFieldsById-java.util.List-org.apache.beam.sdk.transforms.Combine.CombineFn-org.apache.beam.sdk.schemas.Schema.Field-">
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<h4>aggregateFieldsById</h4>
<pre>public abstract&nbsp;&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="class in org.apache.beam.sdk.schemas.transforms">Group.AggregateCombiner</a>&lt;<a href="../../../../../../org/apache/beam/sdk/schemas/transforms/Group.AggregateCombiner.html" title="type parameter in Group.AggregateCombiner">InputT</a>&gt;&nbsp;aggregateFieldsById(java.util.List&lt;java.lang.Integer&gt;&nbsp;inputFieldIds,
<a href="../../../../../../org/apache/beam/sdk/transforms/Combine.CombineFn.html" title="class in org.apache.beam.sdk.transforms">Combine.CombineFn</a>&lt;CombineInputT,AccumT,CombineOutputT&gt;&nbsp;fn,
<a href="../../../../../../org/apache/beam/sdk/schemas/Schema.Field.html" title="class in org.apache.beam.sdk.schemas">Schema.Field</a>&nbsp;outputField)</pre>
<div class="block">Build up an aggregation function over the input elements by field id.
<p>This method specifies an aggregation over multiple fields of the input. The union of all
calls to aggregateField and aggregateFields will determine the output schema.
<p>Field types in the output schema will be inferred from the provided combine function.
Sometimes the field type cannot be inferred due to Java's type erasure. In that case, use the
overload that allows setting the output field type explicitly.</div>
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