org.apache.hadoop.hive.metastore.properties

Class PropertyType<T>

java.lang.Object

org.apache.hadoop.hive.metastore.properties.PropertyType<T>

public abstract class PropertyType<T>
extends Object

A simple type system for properties.

Field Summary

Fields

Modifier and Type	Field and Description
static PropertyType<Boolean>	BOOLEAN
static PropertyType<Date>	DATETIME
static PropertyType<Double>	DOUBLE
static PropertyType<Integer>	INTEGER
static PropertyType<Object>	JSON
static PropertyType<Long>	LONG
static PropertyType<String>	STRING
static TimeZone	UTC The UTC time zone.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	PropertyType(String name) Basic constructor to derive from.

Method Summary

Modifier and Type	Method and Description
abstract T	cast(Object value) Casts a value according to this type.
String	format(Object value) Formats a value according to this type.
static PropertyType<?>	get(String name)
String	getName()
abstract T	parse(String str) Parses a string according to this type.
T	read(DataInput in) Reads a value according to this type.
static boolean	register(PropertyType<?> type) Registers a property type.
String	toString()
void	write(DataOutput out, T value) Writes a value according to this type.

Methods inherited from class java.lang.Object

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

Field Detail

UTC

public static final TimeZone UTC

The UTC time zone.

STRING

public static final PropertyType<String> STRING

BOOLEAN

public static final PropertyType<Boolean> BOOLEAN

INTEGER

public static final PropertyType<Integer> INTEGER

LONG

public static final PropertyType<Long> LONG

DATETIME

public static final PropertyType<Date> DATETIME

DOUBLE

public static final PropertyType<Double> DOUBLE

JSON

public static final PropertyType<Object> JSON

Constructor Detail

PropertyType

protected PropertyType(String name)

Basic constructor to derive from.

Parameters:

name - the type name

Method Detail

get

public static PropertyType<?> get(String name)

Parameters:

name - the type name

Returns:

a type instance if it has been registered

register

public static boolean register(PropertyType<?> type)

Registers a property type.

Parameters:

type - the type

Returns:

true if type is registered, false if it was already registered

Throws:

IllegalArgumentException - if a type with the same name has already been registered

getName

public String getName()

Returns:

this type name

toString

public String toString()

Overrides:

toString in class Object

cast

public abstract T cast(Object value)

Casts a value according to this type.

Parameters:

value - a value

Returns:

an instance for the type or null

parse

public abstract T parse(String str)

Parses a string according to this type.

Parameters:

str - a value

Returns:

an instance for the type or null

format

public String format(Object value)

Formats a value according to this type.

Parameters:

value - a value

Returns:

a string representing a value for the type or null

write

public void write(DataOutput out,
                  T value)
           throws IOException

Writes a value according to this type.

Parameters:

out - a data output

value - a value

Throws:

IOException - if write fails

read

public T read(DataInput in)
       throws IOException

Reads a value according to this type.

Parameters:

in - a data input

Returns:

an instance of a value for the type or null

Throws:

IOException