org.apache.hadoop.hive.serde2.objectinspector

Class UnionStructObjectInspector

java.lang.Object

org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector

org.apache.hadoop.hive.serde2.objectinspector.UnionStructObjectInspector

All Implemented Interfaces:

Cloneable, ObjectInspector

public class UnionStructObjectInspector
extends StructObjectInspector

UnionStructObjectInspector unions several struct data into a single struct. Basically, the fields of these structs are put together sequentially into a single struct. The object that can be acceptable by this ObjectInspector is a List of objects, each of which can be inspected by the ObjectInspector provided in the ctor of UnionStructObjectInspector. 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	UnionStructObjectInspector.MyField MyField.

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

ObjectInspector.Category

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	UnionStructObjectInspector()
protected	UnionStructObjectInspector(List<StructObjectInspector> unionObjectInspectors)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
List<? extends StructField>	getAllStructFieldRefs() Returns all the fields.
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	getStructFieldData(Object data, StructField fieldRef) returns null for data = null.
StructField	getStructFieldRef(String fieldName) Look up a field.
List<Object>	getStructFieldsDataAsList(Object data) returns null for data = null.
String	getTypeName() Returns the name of the data type that is inspected by this ObjectInspector.
int	hashCode()

Methods inherited from class org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector

isSettable, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

UnionStructObjectInspector

protected UnionStructObjectInspector()

UnionStructObjectInspector

protected UnionStructObjectInspector(List<StructObjectInspector> unionObjectInspectors)

Method Detail

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getCategory

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

getStructFieldRef

public StructField getStructFieldRef(String fieldName)

Description copied from class: StructObjectInspector

Look up a field.

Specified by:

getStructFieldRef in class StructObjectInspector

getAllStructFieldRefs

public List<? extends StructField> getAllStructFieldRefs()

Description copied from class: StructObjectInspector

Returns all the fields.

Specified by:

getAllStructFieldRefs in class StructObjectInspector

getStructFieldData

public Object getStructFieldData(Object data,
                        StructField fieldRef)

Description copied from class: StructObjectInspector

returns null for data = null.

Specified by:

getStructFieldData in class StructObjectInspector

getStructFieldsDataAsList

public List<Object> getStructFieldsDataAsList(Object data)

Description copied from class: StructObjectInspector

returns null for data = null.

Specified by:

getStructFieldsDataAsList in class StructObjectInspector