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| <div class="subTitle">org.apache.drill.exec.vector.accessor.writer</div> |
| <h2 title="Class ColumnWriterFactory" class="title">Class ColumnWriterFactory</h2> |
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| <li>org.apache.drill.exec.vector.accessor.writer.ColumnWriterFactory</li> |
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| <pre>public class <span class="typeNameLabel">ColumnWriterFactory</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">Gather generated writer classes into a set of class tables to allow rapid |
| run-time creation of writers. Builds the writer and its object writer |
| wrapper which binds the vector to the writer. |
| <p> |
| Compared to the reader factory, the writer factor is a bit more complex |
| as it must handle both the projected ("real" writer) and unprojected |
| ("dummy" writer) cases. Because of the way the various classes interact, |
| it is cleaner to put the factory methods here rather than in the various |
| writers, as is done in the case of the readers.</div> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/ColumnWriterFactory.html#ColumnWriterFactory--">ColumnWriterFactory</a></span>()</code> </td> |
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| <td class="colFirst"><code>static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/AbstractObjectWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">AbstractObjectWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/ColumnWriterFactory.html#buildColumnWriter-org.apache.drill.exec.record.metadata.ColumnMetadata-org.apache.drill.exec.vector.ValueVector-">buildColumnWriter</a></span>(<a href="../../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> schema, |
| <a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> vector)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/AbstractObjectWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">AbstractObjectWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/ColumnWriterFactory.html#buildDummyColumnWriter-org.apache.drill.exec.record.metadata.ColumnMetadata-">buildDummyColumnWriter</a></span>(<a href="../../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> schema)</code> |
| <div class="block">Build a writer for a non-projected column.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/BaseScalarWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">BaseScalarWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/ColumnWriterFactory.html#newWriter-org.apache.drill.exec.vector.ValueVector-">newWriter</a></span>(<a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> vector)</code> </td> |
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| <h4>ColumnWriterFactory</h4> |
| <pre>public ColumnWriterFactory()</pre> |
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| <h4>buildColumnWriter</h4> |
| <pre>public static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/AbstractObjectWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">AbstractObjectWriter</a> buildColumnWriter(<a href="../../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> schema, |
| <a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> vector)</pre> |
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| <h4>buildDummyColumnWriter</h4> |
| <pre>public static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/AbstractObjectWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">AbstractObjectWriter</a> buildDummyColumnWriter(<a href="../../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> schema)</pre> |
| <div class="block">Build a writer for a non-projected column.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>schema</code> - schema of the column</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>a "dummy" writer for the column</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="newWriter-org.apache.drill.exec.vector.ValueVector-"> |
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| <h4>newWriter</h4> |
| <pre>public static <a href="../../../../../../../org/apache/drill/exec/vector/accessor/writer/BaseScalarWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">BaseScalarWriter</a> newWriter(<a href="../../../../../../../org/apache/drill/exec/vector/ValueVector.html" title="interface in org.apache.drill.exec.vector">ValueVector</a> vector)</pre> |
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