org.apache.hadoop.hive.serde2.objectinspector

Class StandardUnionObjectInspector

java.lang.Object

org.apache.hadoop.hive.serde2.objectinspector.SettableUnionObjectInspector

org.apache.hadoop.hive.serde2.objectinspector.StandardUnionObjectInspector

All Implemented Interfaces:

Cloneable, ObjectInspector, UnionObjectInspector

Direct Known Subclasses:

LazyBinaryUnionObjectInspector

public class StandardUnionObjectInspector
extends SettableUnionObjectInspector

StandardUnionObjectInspector works on union data that is stored as UnionObject. It holds the list of the object inspectors corresponding to each type of the object the Union can hold. The UniobObject has tag followed by the object it is holding. Always use the ObjectInspectorFactory to create new ObjectInspector objects, instead of directly creating an instance of this class.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StandardUnionObjectInspector.StandardUnion

Nested classes/interfaces inherited from interface org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector

ObjectInspector.Category

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	StandardUnionObjectInspector()
	StandardUnionObjectInspector(List<ObjectInspector> ois)

Method Summary

Modifier and Type	Method and Description
Object	create()
ObjectInspector.Category	getCategory() An ObjectInspector must inherit from one of the following interfaces if getCategory() returns: PRIMITIVE: PrimitiveObjectInspector LIST: ListObjectInspector MAP: MapObjectInspector STRUCT: StructObjectInspector.
Object	getField(Object o) Return the field based on the tag value associated with the Object.
List<ObjectInspector>	getObjectInspectors() Returns the array of ObjectInspectors that are for each of the tags.
byte	getTag(Object o) Return the tag of the object.
String	getTypeName() Returns the name of the data type that is inspected by this ObjectInspector.
Object	setFieldAndTag(Object union, Object field, byte tag)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardUnionObjectInspector

protected StandardUnionObjectInspector()

StandardUnionObjectInspector

public StandardUnionObjectInspector(List<ObjectInspector> ois)

Method Detail

getObjectInspectors

public List<ObjectInspector> getObjectInspectors()

Description copied from interface: UnionObjectInspector

Returns the array of ObjectInspectors that are for each of the tags.

getTag

public byte getTag(Object o)

Return the tag of the object.

getField

public Object getField(Object o)

Return the field based on the tag value associated with the Object.

getCategory

public ObjectInspector.Category getCategory()

Description copied from interface: ObjectInspector

An ObjectInspector must inherit from one of the following interfaces if getCategory() returns: PRIMITIVE: PrimitiveObjectInspector LIST: ListObjectInspector MAP: MapObjectInspector STRUCT: StructObjectInspector.

getTypeName

public String getTypeName()

Description copied from interface: ObjectInspector

Returns the name of the data type that is inspected by this ObjectInspector. This is used to display the type information to the user. For primitive types, the type name is standardized. For other types, the type name can be something like "list<int>", "map<int,string>", java class names, or user-defined type names similar to typedef.

toString

public String toString()

Overrides:

toString in class Object

create

public Object create()

Specified by:

create in class SettableUnionObjectInspector

setFieldAndTag

public Object setFieldAndTag(Object union,
                             Object field,
                             byte tag)

Specified by:

setFieldAndTag in class SettableUnionObjectInspector