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<div class="subTitle">org.apache.beam.sdk.io.cassandra</div>
<h2 title="Class CassandraIO.Read" class="title">Class CassandraIO.Read&lt;T&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/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/PBegin.html" title="class in org.apache.beam.sdk.values">PBegin</a>,<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;T&gt;&gt;</li>
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<ul class="inheritance">
<li>org.apache.beam.sdk.io.cassandra.CassandraIO.Read&lt;T&gt;</li>
</ul>
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<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>
</dl>
<dl>
<dt>Enclosing class:</dt>
<dd><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO</a></dd>
</dl>
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<pre>public abstract static class <span class="typeNameLabel">CassandraIO.Read&lt;T&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/PBegin.html" title="class in org.apache.beam.sdk.values">PBegin</a>,<a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values">PCollection</a>&lt;T&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> to read data from Apache Cassandra. See <a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.html" title="class in org.apache.beam.sdk.io.cassandra"><code>CassandraIO</code></a> for more
information on usage and configuration.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../../../../serialized-form.html#org.apache.beam.sdk.io.cassandra.CassandraIO.Read">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></code></li>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#Read--">Read</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="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code><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/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#expand-org.apache.beam.sdk.values.PBegin-">expand</a></span>(<a href="../../../../../../org/apache/beam/sdk/values/PBegin.html" title="class in org.apache.beam.sdk.values">PBegin</a>&nbsp;input)</code>
<div class="block">Override this method to specify how this <code>PTransform</code> should be expanded on the given
<code>InputT</code>.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withCoder-org.apache.beam.sdk.coders.Coder-">withCoder</a></span>(<a href="../../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders">Coder</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;&nbsp;coder)</code>
<div class="block">Specify the <a href="../../../../../../org/apache/beam/sdk/coders/Coder.html" title="class in org.apache.beam.sdk.coders"><code>Coder</code></a> used to serialize the entity in the <a href="../../../../../../org/apache/beam/sdk/values/PCollection.html" title="class in org.apache.beam.sdk.values"><code>PCollection</code></a>.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withConsistencyLevel-java.lang.String-">withConsistencyLevel</a></span>(java.lang.String&nbsp;consistencyLevel)</code>&nbsp;</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withConsistencyLevel-org.apache.beam.sdk.options.ValueProvider-">withConsistencyLevel</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.String&gt;&nbsp;consistencyLevel)</code>&nbsp;</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withEntity-java.lang.Class-">withEntity</a></span>(java.lang.Class&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;&nbsp;entity)</code>
<div class="block">Specify the entity class (annotated POJO).</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withHosts-java.util.List-">withHosts</a></span>(java.util.List&lt;java.lang.String&gt;&nbsp;hosts)</code>
<div class="block">Specify the hosts of the Apache Cassandra instances.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withHosts-org.apache.beam.sdk.options.ValueProvider-">withHosts</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.util.List&lt;java.lang.String&gt;&gt;&nbsp;hosts)</code>
<div class="block">Specify the hosts of the Apache Cassandra instances.</div>
</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withKeyspace-java.lang.String-">withKeyspace</a></span>(java.lang.String&nbsp;keyspace)</code>
<div class="block">Specify the Cassandra keyspace where to read data.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withKeyspace-org.apache.beam.sdk.options.ValueProvider-">withKeyspace</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.String&gt;&nbsp;keyspace)</code>
<div class="block">Specify the Cassandra keyspace where to read data.</div>
</td>
</tr>
<tr id="i9" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withLocalDc-java.lang.String-">withLocalDc</a></span>(java.lang.String&nbsp;localDc)</code>
<div class="block">Specify the local DC used for the load balancing.</div>
</td>
</tr>
<tr id="i10" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withLocalDc-org.apache.beam.sdk.options.ValueProvider-">withLocalDc</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.String&gt;&nbsp;localDc)</code>
<div class="block">Specify the local DC used for the load balancing.</div>
</td>
</tr>
<tr id="i11" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withMapperFactoryFn-org.apache.beam.sdk.transforms.SerializableFunction-">withMapperFactoryFn</a></span>(<a href="../../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;<a href="https://static.javadoc.io/com.datastax.cassandra/cassandra-driver-core/3.6.0/com/datastax/driver/core/Session.html?is-external=true" title="class or interface in com.datastax.driver.core">Session</a>,<a href="../../../../../../org/apache/beam/sdk/io/cassandra/Mapper.html" title="interface in org.apache.beam.sdk.io.cassandra">Mapper</a>&gt;&nbsp;mapperFactory)</code>
<div class="block">A factory to create a specific <a href="../../../../../../org/apache/beam/sdk/io/cassandra/Mapper.html" title="interface in org.apache.beam.sdk.io.cassandra"><code>Mapper</code></a> for a given Cassandra Session.</div>
</td>
</tr>
<tr id="i12" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withMinNumberOfSplits-java.lang.Integer-">withMinNumberOfSplits</a></span>(java.lang.Integer&nbsp;minNumberOfSplits)</code>
<div class="block">It's possible that system.size_estimates isn't populated or that the number of splits
computed by Beam is still to low for Cassandra to handle it.</div>
</td>
</tr>
<tr id="i13" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withMinNumberOfSplits-org.apache.beam.sdk.options.ValueProvider-">withMinNumberOfSplits</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.Integer&gt;&nbsp;minNumberOfSplits)</code>
<div class="block">It's possible that system.size_estimates isn't populated or that the number of splits
computed by Beam is still to low for Cassandra to handle it.</div>
</td>
</tr>
<tr id="i14" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withPassword-java.lang.String-">withPassword</a></span>(java.lang.String&nbsp;password)</code>
<div class="block">Specify the password used for authentication.</div>
</td>
</tr>
<tr id="i15" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withPassword-org.apache.beam.sdk.options.ValueProvider-">withPassword</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.String&gt;&nbsp;password)</code>
<div class="block">Specify the password used for authentication.</div>
</td>
</tr>
<tr id="i16" class="altColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withPort-int-">withPort</a></span>(int&nbsp;port)</code>
<div class="block">Specify the port number of the Apache Cassandra instances.</div>
</td>
</tr>
<tr id="i17" class="rowColor">
<td class="colFirst"><code><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html#withPort-org.apache.beam.sdk.options.ValueProvider-">withPort</a></span>(<a href="../../../../../../org/apache/beam/sdk/options/ValueProvider.html" title="interface in org.apache.beam.sdk.options">ValueProvider</a>&lt;java.lang.Integer&gt;&nbsp;port)</code>
<div class="block">Specify the port number of the Apache Cassandra instances.</div>
</td>
</tr>
<tr id="i18" class="altColor">
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<h4>withMapperFactoryFn</h4>
<pre>public&nbsp;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="class in org.apache.beam.sdk.io.cassandra">CassandraIO.Read</a>&lt;<a href="../../../../../../org/apache/beam/sdk/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;&nbsp;withMapperFactoryFn(<a href="../../../../../../org/apache/beam/sdk/transforms/SerializableFunction.html" title="interface in org.apache.beam.sdk.transforms">SerializableFunction</a>&lt;<a href="https://static.javadoc.io/com.datastax.cassandra/cassandra-driver-core/3.6.0/com/datastax/driver/core/Session.html?is-external=true" title="class or interface in com.datastax.driver.core">Session</a>,<a href="../../../../../../org/apache/beam/sdk/io/cassandra/Mapper.html" title="interface in org.apache.beam.sdk.io.cassandra">Mapper</a>&gt;&nbsp;mapperFactory)</pre>
<div class="block">A factory to create a specific <a href="../../../../../../org/apache/beam/sdk/io/cassandra/Mapper.html" title="interface in org.apache.beam.sdk.io.cassandra"><code>Mapper</code></a> for a given Cassandra Session. This is useful
to provide mappers that don't rely in Cassandra annotated objects.</div>
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<h4>expand</h4>
<pre>public&nbsp;<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/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;&nbsp;expand(<a href="../../../../../../org/apache/beam/sdk/values/PBegin.html" title="class in org.apache.beam.sdk.values">PBegin</a>&nbsp;input)</pre>
<div class="block"><span class="descfrmTypeLabel">Description copied from class:&nbsp;<code><a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#expand-InputT-">PTransform</a></code></span></div>
<div class="block">Override this method to specify how this <code>PTransform</code> should be expanded on the given
<code>InputT</code>.
<p>NOTE: This method should not be called directly. Instead apply the <code>PTransform</code> should
be applied to the <code>InputT</code> using the <code>apply</code> method.
<p>Composite transforms, which are defined in terms of other transforms, should return the
output of one of the composed transforms. Non-composite transforms, which do not apply any
transforms internally, should return a new unbound output and register evaluators (via
backend-specific registration methods).</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code><a href="../../../../../../org/apache/beam/sdk/transforms/PTransform.html#expand-InputT-">expand</a></code>&nbsp;in class&nbsp;<code><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/PBegin.html" title="class in org.apache.beam.sdk.values">PBegin</a>,<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/io/cassandra/CassandraIO.Read.html" title="type parameter in CassandraIO.Read">T</a>&gt;&gt;</code></dd>
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