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| <div class="subTitle">org.apache.drill.exec.vector.accessor</div> |
| <h2 title="Interface TupleWriter" class="title">Interface TupleWriter</h2> |
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| <dl> |
| <dt>All Superinterfaces:</dt> |
| <dd><a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ColumnWriter</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Subinterfaces:</dt> |
| <dd><a href="../../../../../../org/apache/drill/exec/physical/resultSet/RowSetLoader.html" title="interface in org.apache.drill.exec.physical.resultSet">RowSetLoader</a>, <a href="../../../../../../org/apache/drill/exec/physical/rowSet/RowSetWriter.html" title="interface in org.apache.drill.exec.physical.rowSet">RowSetWriter</a></dd> |
| </dl> |
| <dl> |
| <dt>All Known Implementing Classes:</dt> |
| <dd><a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/AbstractTupleWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">AbstractTupleWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/DictEntryWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">DictEntryWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/MapWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">MapWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/MapWriter.ArrayMapWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">MapWriter.ArrayMapWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/MapWriter.DummyArrayMapWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">MapWriter.DummyArrayMapWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/MapWriter.DummyMapWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">MapWriter.DummyMapWriter</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/writer/MapWriter.SingleMapWriter.html" title="class in org.apache.drill.exec.vector.accessor.writer">MapWriter.SingleMapWriter</a>, <a href="../../../../../../org/apache/drill/exec/physical/resultSet/impl/RowSetLoaderImpl.html" title="class in org.apache.drill.exec.physical.resultSet.impl">RowSetLoaderImpl</a>, <a href="../../../../../../org/apache/drill/exec/physical/rowSet/RowSetWriterImpl.html" title="class in org.apache.drill.exec.physical.rowSet">RowSetWriterImpl</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public interface <span class="typeNameLabel">TupleWriter</span> |
| extends <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ColumnWriter</a></pre> |
| <div class="block">Writer for a tuple. A tuple is composed of columns with a fixed order and |
| unique names: either can be used to reference columns. Columns are scalar |
| (simple values), tuples (i.e. maps), or arrays (of scalars, tuples or |
| arrays.) The row itself is just the top-level (anonymous) tuple. Generally, |
| implementers of this interface provide additional services on the |
| implementation of the top-level tuple (often called a "row writer.") Columns |
| are accessible via the associated column writer by name or index. Column |
| indexes are defined by the tuple schema. |
| <p> |
| Consumers of this interface can define the schema up front, or can define the |
| schema as the write progresses. To avoid redundant checks to see if a column |
| is already defined, consumers can simply ask for a column by name. The |
| <code>column()</code> (and related) methods will throw an (unchecked) |
| <a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.UndefinedColumnException.html" title="class in org.apache.drill.exec.vector.accessor"><code>TupleWriter.UndefinedColumnException</code></a> exception if the column is undefined. The |
| consumer can catch the exception, define the column, and fetch the column |
| writer again. New columns may be added via this interface at any time; the |
| new column takes the next available index. |
| <p> |
| Also provides a convenience method to set the column value from a Java |
| object. The caller is responsible for providing the correct object type for |
| each column. (The object type must match the column accessor type.) |
| <p> |
| Convenience methods allow getting a column as a scalar, tuple or array. These |
| methods throw an exception if the column is not of the requested type.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><code>SingleMapWriter}, the class which this class replaces</code></dd> |
| </dl> |
| </li> |
| </ul> |
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| <h3>Nested Class Summary</h3> |
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| <caption><span>Nested Classes</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Interface and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.UndefinedColumnException.html" title="class in org.apache.drill.exec.vector.accessor">TupleWriter.UndefinedColumnException</a></span></code> |
| <div class="block">Unchecked exception thrown when attempting to access a column writer by |
| name for an undefined columns.</div> |
| </td> |
| </tr> |
| </table> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd"> </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>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#addColumn-org.apache.drill.exec.record.metadata.ColumnMetadata-">addColumn</a></span>(<a href="../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> column)</code> |
| <div class="block">Add a column to the tuple (row or map) that backs this writer.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#addColumn-org.apache.drill.exec.record.MaterializedField-">addColumn</a></span>(<a href="../../../../../../org/apache/drill/exec/record/MaterializedField.html" title="class in org.apache.drill.exec.record">MaterializedField</a> schema)</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ArrayWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ArrayWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#array-int-">array</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ArrayWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ArrayWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#array-java.lang.String-">array</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ObjectWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ObjectWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#column-int-">column</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ObjectWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ObjectWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#column-java.lang.String-">column</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/DictWriter.html" title="interface in org.apache.drill.exec.vector.accessor">DictWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#dict-int-">dict</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/DictWriter.html" title="interface in org.apache.drill.exec.vector.accessor">DictWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#dict-java.lang.String-">dict</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#isProjected-java.lang.String-">isProjected</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columnName)</code> |
| <div class="block">Reports whether the given column is projected.</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ScalarWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ScalarWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#scalar-int-">scalar</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ScalarWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ScalarWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#scalar-java.lang.String-">scalar</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#set-int-java.lang.Object-">set</a></span>(int colIndex, |
| <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> value)</code> |
| <div class="block">Write a value to the given column, automatically calling the proper |
| <code>set<i>Type</i></code> method for the data.</div> |
| </td> |
| </tr> |
| <tr id="i12" class="altColor"> |
| <td class="colFirst"><code>int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#size--">size</a></span>()</code> </td> |
| </tr> |
| <tr id="i13" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html" title="interface in org.apache.drill.exec.vector.accessor">TupleWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#tuple-int-">tuple</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i14" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html" title="interface in org.apache.drill.exec.vector.accessor">TupleWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#tuple-java.lang.String-">tuple</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i15" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/record/metadata/TupleMetadata.html" title="interface in org.apache.drill.exec.record.metadata">TupleMetadata</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#tupleSchema--">tupleSchema</a></span>()</code> </td> |
| </tr> |
| <tr id="i16" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ObjectType.html" title="enum in org.apache.drill.exec.vector.accessor">ObjectType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#type-int-">type</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i17" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ObjectType.html" title="enum in org.apache.drill.exec.vector.accessor">ObjectType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#type-java.lang.String-">type</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| <tr id="i18" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/VariantWriter.html" title="interface in org.apache.drill.exec.vector.accessor">VariantWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#variant-int-">variant</a></span>(int colIndex)</code> </td> |
| </tr> |
| <tr id="i19" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/drill/exec/vector/accessor/VariantWriter.html" title="interface in org.apache.drill.exec.vector.accessor">VariantWriter</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/drill/exec/vector/accessor/TupleWriter.html#variant-java.lang.String-">variant</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> colName)</code> </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.drill.exec.vector.accessor.ColumnWriter"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from interface org.apache.drill.exec.vector.accessor.<a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html" title="interface in org.apache.drill.exec.vector.accessor">ColumnWriter</a></h3> |
| <code><a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#copy-org.apache.drill.exec.vector.accessor.ColumnReader-">copy</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#isProjected--">isProjected</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#nullable--">nullable</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#schema--">schema</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#setNull--">setNull</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#setObject-java.lang.Object-">setObject</a>, <a href="../../../../../../org/apache/drill/exec/vector/accessor/ColumnWriter.html#type--">type</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
| <!-- --> |
| </a> |
| <h3>Method Detail</h3> |
| <a name="isProjected-java.lang.String-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isProjected</h4> |
| <pre>boolean isProjected(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> columnName)</pre> |
| <div class="block">Reports whether the given column is projected. Useful for |
| clients that can simply skip over unprojected columns.</div> |
| </li> |
| </ul> |
| <a name="addColumn-org.apache.drill.exec.record.metadata.ColumnMetadata-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addColumn</h4> |
| <pre>int addColumn(<a href="../../../../../../org/apache/drill/exec/record/metadata/ColumnMetadata.html" title="interface in org.apache.drill.exec.record.metadata">ColumnMetadata</a> column)</pre> |
| <div class="block">Add a column to the tuple (row or map) that backs this writer. Support for |
| this operation depends on whether the client code has registered a listener |
| to implement the addition. Throws an exception if no listener is |
| implemented, or if the add request is otherwise invalid (duplicate name, |
| etc.)</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>column</code> - the metadata for the column to add</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>the index of the newly added column which can be used to access the |
| newly added writer</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="addColumn-org.apache.drill.exec.record.MaterializedField-"> |
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| <pre>int addColumn(<a href="../../../../../../org/apache/drill/exec/record/MaterializedField.html" title="class in org.apache.drill.exec.record">MaterializedField</a> schema)</pre> |
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| <h4>set</h4> |
| <pre>void set(int colIndex, |
| <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> value)</pre> |
| <div class="block">Write a value to the given column, automatically calling the proper |
| <code>set<i>Type</i></code> method for the data. While this method is |
| convenient for testing, it incurs quite a bit of type-checking overhead and |
| is not suitable for production code.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>colIndex</code> - the index of the column to set</dd> |
| <dd><code>value</code> - the value to set. The type of the object must be compatible with |
| the type of the target column</dd> |
| </dl> |
| </li> |
| </ul> |
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