org.apache.hadoop.hive.metastore.properties

Class Serializer<T extends Serializable>

java.lang.Object

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

Type Parameters:

T -

public class Serializer<T extends Serializable>
extends Object

A helper class to read/write objects through the SerializationProxy.

Constructor Summary

Constructors

Constructor and Description
Serializer() Default constructor.

Method Summary

Modifier and Type	Method and Description
<E extends T> E	read(File file, Object... args) Loads an object from the persistent storage.
<E extends T> E	read(InputStream in, Object... args) Loads an object from the persistent storage.
void	readError(Exception xany, String msg) Called when an error occurs during read.
void	readWarning(Exception xany, String msg) Called when a warning occurs during read.
<E extends T> boolean	write(File file, E persist, Object... args) Saves an object to persistent storage.
<E extends T> boolean	write(OutputStream out, E persist, Object... args) Saves an object to persistent storage.
void	writeError(Exception xany, String msg) Called when an error occurs during write.
void	writeWarning(Exception xany, String msg) Called when an error occurs during write.

Methods inherited from class java.lang.Object

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

Constructor Detail

Serializer

public Serializer()

Default constructor.

Method Detail

readError

public void readError(Exception xany,
                      String msg)

Called when an error occurs during read.

Default is to throw a ProxyException.

Parameters:

xany - an exception

msg - the message

readWarning

public void readWarning(Exception xany,
                        String msg)

Called when a warning occurs during read.

Default is to log a warning through the SerializationProxy logger.

Parameters:

xany - an exception

msg - the message

writeError

public void writeError(Exception xany,
                       String msg)

Called when an error occurs during write.

Default is to throw a ProxyException.

Parameters:

xany - an exception

msg - the message

writeWarning

public void writeWarning(Exception xany,
                         String msg)

Called when an error occurs during write.

Default is to log a warning through the SerializationProxy logger.

Parameters:

xany - an exception

msg - the message

write

public final <E extends T> boolean write(File file,
                                         E persist,
                                         Object... args)

Saves an object to persistent storage.

Type Parameters:

E - the class of the object to persist

Parameters:

file - the file to write to; it will be created if it does not exist, overwritten otherwise

persist - the object to serialize

args - the proxy arguments

Returns:

true if successful, false if file is null

Throws:

SerializationProxy.ProxyException - in case of low level error

write

public final <E extends T> boolean write(OutputStream out,
                                         E persist,
                                         Object... args)

Saves an object to persistent storage.

Type Parameters:

E - the class of the object to persist

Parameters:

out - the stream to write to

persist - the object to serialize

args - the proxy arguments

Returns:

true if successful, false if file is null

Throws:

SerializationProxy.ProxyException - in case of low level error

read

public final <E extends T> E read(File file,
                                  Object... args)

Loads an object from the persistent storage.

Type Parameters:

E - the class of the object to read

Parameters:

file - the file to read from

args - the proxy arguments

Returns:

the object or null if file is null

Throws:

SerializationProxy.ProxyException - in case of low level error

read

public final <E extends T> E read(InputStream in,
                                  Object... args)

Loads an object from the persistent storage.

Type Parameters:

E - the class of the object to read

Parameters:

in - the stream to read from

args - the proxy arguments

Returns:

the object or null if file is null

Throws:

SerializationProxy.ProxyException - in case of low level error