org.apache.drill.exec.record.metadata

Class UnionBuilder

java.lang.Object

org.apache.drill.exec.record.metadata.UnionBuilder

public class UnionBuilder
extends Object

Builds unions or (non-repeated) lists (which implicitly contain unions.)

Class can be created with and without parent container. In the first case, column is added to the parent container during creation and all resumeXXX methods return qualified parent container. In the second case column is created without parent container as standalone entity. All resumeXXX methods do not produce any action and return null. To access built column buildColumn() should be used.

Constructor Summary

Constructors

Constructor and Description
UnionBuilder(org.apache.drill.exec.record.metadata.SchemaContainer parent, String name, TypeProtos.MinorType type)
UnionBuilder(String name, TypeProtos.MinorType type)

Method Summary

Modifier and Type	Method and Description
void	addColumn(ColumnMetadata column)
DictBuilder	addDict()
UnionBuilder	addList()
MapBuilder	addMap()
RepeatedListBuilder	addRepeatedList()
UnionBuilder	addType(TypeProtos.MinorType type)
void	build()
VariantColumnMetadata	buildColumn()
DictBuilder	resumeDict()
RepeatedListBuilder	resumeList()
MapBuilder	resumeMap()
RepeatedListBuilder	resumeRepeatedList()
SchemaBuilder	resumeSchema()
UnionBuilder	resumeUnion()

Methods inherited from class java.lang.Object

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

Constructor Detail

UnionBuilder

public UnionBuilder(String name,
                    TypeProtos.MinorType type)

UnionBuilder

public UnionBuilder(org.apache.drill.exec.record.metadata.SchemaContainer parent,
                    String name,
                    TypeProtos.MinorType type)

Method Detail

addColumn

public void addColumn(ColumnMetadata column)

addType

public UnionBuilder addType(TypeProtos.MinorType type)

addMap

public MapBuilder addMap()

addList

public UnionBuilder addList()

addRepeatedList

public RepeatedListBuilder addRepeatedList()

addDict

public DictBuilder addDict()

buildColumn

public VariantColumnMetadata buildColumn()

build

public void build()

resumeSchema

public SchemaBuilder resumeSchema()

resumeMap

public MapBuilder resumeMap()

resumeUnion

public UnionBuilder resumeUnion()

resumeList

public RepeatedListBuilder resumeList()

resumeDict

public DictBuilder resumeDict()

resumeRepeatedList

public RepeatedListBuilder resumeRepeatedList()