Package org.apache.drill.exec.physical.resultSet.model.single

Class BaseWriterBuilder

java.lang.Object

org.apache.drill.exec.physical.resultSet.model.single.BaseWriterBuilder

Direct Known Subclasses:

DirectRowSet.RowSetWriterBuilder

public abstract class BaseWriterBuilder
extends Object

Build a set of writers for a single (non-hyper) vector container. This base class provides behavior common to the test-time RowSet abstractions, and the production result set loader abstractions.

Writers are built recursively by walking the tree that defines a row's structure. For a classic relational tuple, the tree has just a root and a set of primitives. But, once we add array (repeated), variant (LIST, UNION) and tuple (MAP) columns, the tree grows quite complex.

Constructor Summary

Constructors

Constructor	Description
BaseWriterBuilder()

Method Summary

Modifier and Type	Method	Description
protected List<AbstractObjectWriter>	buildContainerChildren(VectorContainer container, MetadataProvider mdProvider)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BaseWriterBuilder

public BaseWriterBuilder()

Method Details

buildContainerChildren

protected List<AbstractObjectWriter> buildContainerChildren(VectorContainer container,
 MetadataProvider mdProvider)