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<h2 title="Class DoFn.WindowedContext" class="title">Class DoFn.WindowedContext</h2>
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<li>java.lang.Object</li>
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<li>org.apache.beam.sdk.transforms.DoFn.WindowedContext</li>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.OnTimerContext.html" title="class in org.apache.beam.sdk.transforms">DoFn.OnTimerContext</a>, <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessContext.html" title="class in org.apache.beam.sdk.transforms">DoFn.ProcessContext</a></dd>
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<dl>
<dt>Enclosing class:</dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms">DoFn</a>&lt;<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">InputT</a>,<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">OutputT</a>&gt;</dd>
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<pre>public abstract class <span class="typeNameLabel">DoFn.WindowedContext</span>
extends java.lang.Object</pre>
<div class="block">Information accessible to all methods in this <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> where the context is in some window.</div>
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#WindowedContext--">WindowedContext</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code>abstract <a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options">PipelineOptions</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#getPipelineOptions--">getPipelineOptions</a></span>()</code>
<div class="block">Returns the <code>PipelineOptions</code> specified with the <a href="../../../../../org/apache/beam/sdk/PipelineRunner.html" title="class in org.apache.beam.sdk"><code>PipelineRunner</code></a> invoking this <code>DoFn</code>.</div>
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<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#output-OutputT-">output</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">OutputT</a>&nbsp;output)</code>
<div class="block">Adds the given element to the main output <code>PCollection</code>.</div>
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<td class="colFirst"><code>abstract &lt;T&gt;&nbsp;void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#output-org.apache.beam.sdk.values.TupleTag-T-">output</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TupleTag.html" title="class in org.apache.beam.sdk.values">TupleTag</a>&lt;T&gt;&nbsp;tag,
T&nbsp;output)</code>
<div class="block">Adds the given element to the output <code>PCollection</code> with the given tag.</div>
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<td class="colFirst"><code>abstract void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#outputWithTimestamp-OutputT-org.joda.time.Instant-">outputWithTimestamp</a></span>(<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">OutputT</a>&nbsp;output,
<a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>&nbsp;timestamp)</code>
<div class="block">Adds the given element to the main output <code>PCollection</code>, with the given timestamp.</div>
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<td class="colFirst"><code>abstract &lt;T&gt;&nbsp;void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/beam/sdk/transforms/DoFn.WindowedContext.html#outputWithTimestamp-org.apache.beam.sdk.values.TupleTag-T-org.joda.time.Instant-">outputWithTimestamp</a></span>(<a href="../../../../../org/apache/beam/sdk/values/TupleTag.html" title="class in org.apache.beam.sdk.values">TupleTag</a>&lt;T&gt;&nbsp;tag,
T&nbsp;output,
<a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>&nbsp;timestamp)</code>
<div class="block">Adds the given element to the specified output <code>PCollection</code>, with the given timestamp.</div>
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<h4>WindowedContext</h4>
<pre>public&nbsp;WindowedContext()</pre>
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<pre>public abstract&nbsp;<a href="../../../../../org/apache/beam/sdk/options/PipelineOptions.html" title="interface in org.apache.beam.sdk.options">PipelineOptions</a>&nbsp;getPipelineOptions()</pre>
<div class="block">Returns the <code>PipelineOptions</code> specified with the <a href="../../../../../org/apache/beam/sdk/PipelineRunner.html" title="class in org.apache.beam.sdk"><code>PipelineRunner</code></a> invoking this <code>DoFn</code>.</div>
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<pre>public abstract&nbsp;void&nbsp;output(<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">OutputT</a>&nbsp;output)</pre>
<div class="block">Adds the given element to the main output <code>PCollection</code>.
<p>Once passed to <code>output</code> the element should not be modified in any way.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessElement.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.ProcessElement</code></a>, the output element will have the same timestamp
and be in the same windows as the input element passed to the method annotated with
<code>@ProcessElement</code>.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a> or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a>, this will attempt to use the
<a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a> of the input <code>PCollection</code> to
determine what windows the element should be in, throwing an exception if the <code>WindowFn</code> attempts to access any information about the input element. The output element will
have a timestamp of negative infinity.
<p><i>Note:</i> A splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> is not allowed to output from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a>
or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a> methods.</div>
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<h4>outputWithTimestamp</h4>
<pre>public abstract&nbsp;void&nbsp;outputWithTimestamp(<a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="type parameter in DoFn">OutputT</a>&nbsp;output,
<a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>&nbsp;timestamp)</pre>
<div class="block">Adds the given element to the main output <code>PCollection</code>, with the given timestamp.
<p>Once passed to <code>outputWithTimestamp</code> the element should not be modified in any way.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessElement.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.ProcessElement</code></a>), the timestamp must not be older than the input
element's timestamp minus <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html#getAllowedTimestampSkew--"><code>DoFn.getAllowedTimestampSkew()</code></a>. The output element will be in
the same windows as the input element.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a> or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a>, this will attempt to use the
<a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a> of the input <code>PCollection</code> to
determine what windows the element should be in, throwing an exception if the <code>WindowFn</code> attempts to access any information about the input element except for the
timestamp.
<p><i>Note:</i> A splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> is not allowed to output from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a>
or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a> methods.</div>
</li>
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<pre>public abstract&nbsp;&lt;T&gt;&nbsp;void&nbsp;output(<a href="../../../../../org/apache/beam/sdk/values/TupleTag.html" title="class in org.apache.beam.sdk.values">TupleTag</a>&lt;T&gt;&nbsp;tag,
T&nbsp;output)</pre>
<div class="block">Adds the given element to the output <code>PCollection</code> with the given tag.
<p>Once passed to <code>output</code> the element should not be modified in any way.
<p>The caller of <code>ParDo</code> uses <a href="../../../../../org/apache/beam/sdk/transforms/ParDo.SingleOutput.html#withOutputTags-org.apache.beam.sdk.values.TupleTag-org.apache.beam.sdk.values.TupleTagList-"><code>ParDo.SingleOutput.withOutputTags(org.apache.beam.sdk.values.TupleTag&lt;OutputT&gt;, org.apache.beam.sdk.values.TupleTagList)</code></a> to specify the
tags of outputs that it consumes. Non-consumed outputs, e.g., outputs for monitoring purposes
only, don't necessarily need to be specified.
<p>The output element will have the same timestamp and be in the same windows as the input
element passed to <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessElement.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.ProcessElement</code></a>).
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a> or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a>, this will attempt to use the
<a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a> of the input <code>PCollection</code> to
determine what windows the element should be in, throwing an exception if the <code>WindowFn</code> attempts to access any information about the input element. The output element will
have a timestamp of negative infinity.
<p><i>Note:</i> A splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> is not allowed to output from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a>
or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a> methods.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/ParDo.SingleOutput.html#withOutputTags-org.apache.beam.sdk.values.TupleTag-org.apache.beam.sdk.values.TupleTagList-"><code>ParDo.SingleOutput.withOutputTags(org.apache.beam.sdk.values.TupleTag&lt;OutputT&gt;, org.apache.beam.sdk.values.TupleTagList)</code></a></dd>
</dl>
</li>
</ul>
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<pre>public abstract&nbsp;&lt;T&gt;&nbsp;void&nbsp;outputWithTimestamp(<a href="../../../../../org/apache/beam/sdk/values/TupleTag.html" title="class in org.apache.beam.sdk.values">TupleTag</a>&lt;T&gt;&nbsp;tag,
T&nbsp;output,
<a href="http://www.joda.org/joda-time/apidocs/org/joda/time/Instant.html?is-external=true" title="class or interface in org.joda.time">Instant</a>&nbsp;timestamp)</pre>
<div class="block">Adds the given element to the specified output <code>PCollection</code>, with the given timestamp.
<p>Once passed to <code>outputWithTimestamp</code> the element should not be modified in any way.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.ProcessElement.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.ProcessElement</code></a>), the timestamp must not be older than the input
element's timestamp minus <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html#getAllowedTimestampSkew--"><code>DoFn.getAllowedTimestampSkew()</code></a>. The output element will be in
the same windows as the input element.
<p>If invoked from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a> or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a>, this will attempt to use the
<a href="../../../../../org/apache/beam/sdk/transforms/windowing/WindowFn.html" title="class in org.apache.beam.sdk.transforms.windowing"><code>WindowFn</code></a> of the input <code>PCollection</code> to
determine what windows the element should be in, throwing an exception if the <code>WindowFn</code> attempts to access any information about the input element except for the
timestamp.
<p><i>Note:</i> A splittable <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.html" title="class in org.apache.beam.sdk.transforms"><code>DoFn</code></a> is not allowed to output from <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.StartBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.StartBundle</code></a>
or <a href="../../../../../org/apache/beam/sdk/transforms/DoFn.FinishBundle.html" title="annotation in org.apache.beam.sdk.transforms"><code>DoFn.FinishBundle</code></a> methods.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../org/apache/beam/sdk/transforms/ParDo.SingleOutput.html#withOutputTags-org.apache.beam.sdk.values.TupleTag-org.apache.beam.sdk.values.TupleTagList-"><code>ParDo.SingleOutput.withOutputTags(org.apache.beam.sdk.values.TupleTag&lt;OutputT&gt;, org.apache.beam.sdk.values.TupleTagList)</code></a></dd>
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