org.apache.hadoop.hive.serde2.lazy.objectinspector

Class LazyListObjectInspector

java.lang.Object

org.apache.hadoop.hive.serde2.lazy.objectinspector.LazyListObjectInspector

All Implemented Interfaces:

Cloneable, ListObjectInspector, ObjectInspector

public class LazyListObjectInspector
extends Object
implements ListObjectInspector

LazyListObjectInspector works on array data that is stored in LazyArray. Always use the ObjectInspectorFactory to create new ObjectInspector objects, instead of directly creating an instance of this class.

Nested Class Summary

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

ObjectInspector.Category

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.commons.logging.Log	LOG

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LazyListObjectInspector()
protected	LazyListObjectInspector(ObjectInspector listElementObjectInspector, byte separator, LazyObjectInspectorParameters lazyParams) Call ObjectInspectorFactory.getLazySimpleListObjectInspector instead.

Method Summary

Methods

Modifier and Type	Method and Description
ObjectInspector.Category	getCategory() An ObjectInspector must inherit from one of the following interfaces if getCategory() returns: PRIMITIVE: PrimitiveObjectInspector LIST: ListObjectInspector MAP: MapObjectInspector STRUCT: StructObjectInspector.
byte	getEscapeChar()
LazyObjectInspectorParameters	getLazyParams()
List<?>	getList(Object data) returns null for data = null.
Object	getListElement(Object data, int index) returns null for null list, out-of-the-range index.
ObjectInspector	getListElementObjectInspector()
int	getListLength(Object data) returns -1 for data = null.
org.apache.hadoop.io.Text	getNullSequence() Returns the NullSequence for this array.
byte	getSeparator() Returns the separator for delimiting items in this array.
String	getTypeName() Returns the name of the data type that is inspected by this ObjectInspector.
boolean	isEscaped()

Methods inherited from class java.lang.Object

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

Field Detail

LOG

public static final org.apache.commons.logging.Log LOG

Constructor Detail

LazyListObjectInspector

protected LazyListObjectInspector()

LazyListObjectInspector

protected LazyListObjectInspector(ObjectInspector listElementObjectInspector,
                       byte separator,
                       LazyObjectInspectorParameters lazyParams)

Call ObjectInspectorFactory.getLazySimpleListObjectInspector instead.

Method Detail

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.

Specified by:

getCategory in interface ObjectInspector

getListElementObjectInspector

public ObjectInspector getListElementObjectInspector()

Specified by:

getListElementObjectInspector in interface ListObjectInspector

getListElement

public Object getListElement(Object data,
                    int index)

Description copied from interface: ListObjectInspector

returns null for null list, out-of-the-range index.

Specified by:

getListElement in interface ListObjectInspector

getListLength

public int getListLength(Object data)

Description copied from interface: ListObjectInspector

returns -1 for data = null.

Specified by:

getListLength in interface ListObjectInspector

getList

public List<?> getList(Object data)

Description copied from interface: ListObjectInspector

returns null for data = null. Note: This method should not return a List object that is reused by the same ListObjectInspector, because it's possible that the same ListObjectInspector will be used in multiple places in the code. However it's OK if the List object is part of the Object data.

Specified by:

getList in interface ListObjectInspector

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

getSeparator

public byte getSeparator()

Returns the separator for delimiting items in this array. Called by LazyArray.init(...).

getNullSequence

public org.apache.hadoop.io.Text getNullSequence()

Returns the NullSequence for this array. Called by LazyArray.init(...).

isEscaped

public boolean isEscaped()

getEscapeChar

public byte getEscapeChar()

getLazyParams

public LazyObjectInspectorParameters getLazyParams()