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

java.lang.Object
  org.apache.hadoop.hive.serde2.objectinspector.StandardUnionObjectInspector

All Implemented Interfaces:

Cloneable, ObjectInspector, UnionObjectInspector

public class StandardUnionObjectInspector
extends Object
implements UnionObjectInspector

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

static class

StandardUnionObjectInspector.StandardUnion

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

ObjectInspector.Category

Constructor Summary

StandardUnionObjectInspector(List<ObjectInspector> ois)

Method Summary

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.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

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.

Specified by:

getObjectInspectors in interface UnionObjectInspector

getTag

public byte getTag(Object o)

Return the tag of the object.

Specified by:

getTag in interface UnionObjectInspector

getField

public Object getField(Object o)

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

Specified by:

getField in interface UnionObjectInspector

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.

Specified by:

getCategory in interface ObjectInspector

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", "map", java class names, or user-defined type names similar to typedef.

Specified by:

getTypeName in interface ObjectInspector

toString

public String toString()

Overrides:

toString in class Object