com.asakusafw.directio.hive.serde

Class PropertyDescriptor

java.lang.Object

com.asakusafw.directio.hive.serde.PropertyDescriptor

All Implemented Interfaces:

PropertyExtractor, ValueSerde, org.apache.hadoop.hive.serde2.objectinspector.StructField

public abstract class PropertyDescriptor
extends Object
implements org.apache.hadoop.hive.serde2.objectinspector.StructField, ValueSerde, PropertyExtractor

Represents a property in data model object.

Since:

0.7.0

Version:

0.7.2

Constructor Summary

Constructors

Constructor and Description
PropertyDescriptor(String name, ValueSerde serde) Creates a new instance.
PropertyDescriptor(String name, ValueSerde serde, String comment) Creates a new instance.

Method Summary

Modifier and Type	Method and Description
abstract ValueOption<?>	extract(Object dataModel) Returns the target property in the data model.
ValueDriver	getDriver(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector target) Returns an ValueDriver.
String	getFieldComment()
int	getFieldID()
String	getFieldName()
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector	getFieldObjectInspector()
org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector	getInspector() Returns an ObjectInspector.
ColumnInfo	getSchema() Returns the ColumnInfo of this property.
org.apache.hadoop.hive.serde2.typeinfo.TypeInfo	getTypeInfo() Returns the type info.
Class<? extends ValueOption<?>>	getValueClass() Returns the ValueOption class.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyDescriptor

public PropertyDescriptor(String name,
                          ValueSerde serde)

Creates a new instance.

Parameters:

name - the property name

serde - the property accessor

PropertyDescriptor

public PropertyDescriptor(String name,
                          ValueSerde serde,
                          String comment)

Creates a new instance.

Parameters:

name - the property name

serde - the property accessor

comment - comment for the property (nullable)

Method Detail

extract

public abstract ValueOption<?> extract(Object dataModel)

Description copied from interface: PropertyExtractor

Returns the target property in the data model.

Specified by:

extract in interface PropertyExtractor

Parameters:

dataModel - the target data model

Returns:

the target property, never returns null

getTypeInfo

public org.apache.hadoop.hive.serde2.typeinfo.TypeInfo getTypeInfo()

Description copied from interface: ValueSerde

Returns the type info.

Specified by:

getTypeInfo in interface ValueSerde

Returns:

the type info

getValueClass

public Class<? extends ValueOption<?>> getValueClass()

Description copied from interface: ValueSerde

Returns the ValueOption class.

Specified by:

getValueClass in interface ValueSerde

Returns:

the ValueOption class

getInspector

public org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector getInspector()

Description copied from interface: ValueSerde

Returns an ObjectInspector.

Specified by:

getInspector in interface ValueSerde

Returns:

the ObjectInspector

getDriver

public ValueDriver getDriver(org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector target)

Description copied from interface: ValueSerde

Returns an ValueDriver.

Specified by:

getDriver in interface ValueSerde

Parameters:

target - the target ObjectInspector

Returns:

the ValueDriver for the target ObjectInspector

getFieldName

public String getFieldName()

Specified by:

getFieldName in interface org.apache.hadoop.hive.serde2.objectinspector.StructField

getFieldObjectInspector

public org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector getFieldObjectInspector()

Specified by:

getFieldObjectInspector in interface org.apache.hadoop.hive.serde2.objectinspector.StructField

getFieldComment

public String getFieldComment()

Specified by:

getFieldComment in interface org.apache.hadoop.hive.serde2.objectinspector.StructField

getFieldID

public int getFieldID()

Specified by:

getFieldID in interface org.apache.hadoop.hive.serde2.objectinspector.StructField

getSchema

public ColumnInfo getSchema()

Returns the ColumnInfo of this property.

Returns:

the ColumnInfo

Since:

0.8.1

toString

public String toString()

Overrides:

toString in class Object