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

Class LazyMapObjectInspector

java.lang.Object

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

All Implemented Interfaces:

Cloneable, MapObjectInspector, ObjectInspector

public class LazyMapObjectInspector
extends Object
implements MapObjectInspector

LazyMapObjectInspector works on struct data that is stored in LazyStruct. 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	LazyMapObjectInspector()
protected	LazyMapObjectInspector(ObjectInspector mapKeyObjectInspector, ObjectInspector mapValueObjectInspector, byte itemSeparator, byte keyValueSeparator, LazyObjectInspectorParameters lazyParams)
protected	LazyMapObjectInspector(ObjectInspector mapKeyObjectInspector, ObjectInspector mapValueObjectInspector, byte itemSeparator, byte keyValueSeparator, org.apache.hadoop.io.Text nullSequence, boolean escaped, byte escapeChar) Call ObjectInspectorFactory.getStandardListObjectInspector 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()
byte	getItemSeparator()
byte	getKeyValueSeparator()
LazyObjectInspectorParameters	getLazyParams()
Map<?,?>	getMap(Object data) returns null for data = null.
ObjectInspector	getMapKeyObjectInspector()
int	getMapSize(Object data) returns -1 for NULL map.
Object	getMapValueElement(Object data, Object key)
ObjectInspector	getMapValueObjectInspector()
org.apache.hadoop.io.Text	getNullSequence()
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

LazyMapObjectInspector

protected LazyMapObjectInspector()

LazyMapObjectInspector

protected LazyMapObjectInspector(ObjectInspector mapKeyObjectInspector,
                      ObjectInspector mapValueObjectInspector,
                      byte itemSeparator,
                      byte keyValueSeparator,
                      org.apache.hadoop.io.Text nullSequence,
                      boolean escaped,
                      byte escapeChar)

Call ObjectInspectorFactory.getStandardListObjectInspector instead.

LazyMapObjectInspector

protected LazyMapObjectInspector(ObjectInspector mapKeyObjectInspector,
                      ObjectInspector mapValueObjectInspector,
                      byte itemSeparator,
                      byte keyValueSeparator,
                      LazyObjectInspectorParameters lazyParams)

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

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

getMapKeyObjectInspector

public ObjectInspector getMapKeyObjectInspector()

Specified by:

getMapKeyObjectInspector in interface MapObjectInspector

getMapValueObjectInspector

public ObjectInspector getMapValueObjectInspector()

Specified by:

getMapValueObjectInspector in interface MapObjectInspector

getMapValueElement

public Object getMapValueElement(Object data,
                        Object key)

Specified by:

getMapValueElement in interface MapObjectInspector

getMap

public Map<?,?> getMap(Object data)

Description copied from interface: MapObjectInspector

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

Specified by:

getMap in interface MapObjectInspector

getMapSize

public int getMapSize(Object data)

Description copied from interface: MapObjectInspector

returns -1 for NULL map.

Specified by:

getMapSize in interface MapObjectInspector

getItemSeparator

public byte getItemSeparator()

getKeyValueSeparator

public byte getKeyValueSeparator()

getNullSequence

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

isEscaped

public boolean isEscaped()

getEscapeChar

public byte getEscapeChar()

getLazyParams

public LazyObjectInspectorParameters getLazyParams()