keel.Algorithms.SVM.SMO.core

Class SerializationHelper

java.lang.Object

keel.Algorithms.SVM.SMO.core.SerializationHelper

public class SerializationHelper
extends java.lang.Object

A helper class for determining serialVersionUIDs and checking whether classes contain one and/or need one. One can also serialize and deserialize objects to and fro files or streams.

Version:

$Revision: 1.1 $

Author:

fracpete (fracpete at waikato dot ac dot nz)

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	SERIAL_VERSION_UID the field name of serialVersionUID

Constructor Summary

Constructors

Constructor and Description
SerializationHelper()

Method Summary

Modifier and Type	Method and Description
static long	getUID(java.lang.Class c) reads or creates the serialVersionUID for the given class
static long	getUID(java.lang.String classname) reads or creates the serialVersionUID for the given class
static boolean	hasUID(java.lang.Class c) checks whether the given class contains a serialVersionUID
static boolean	hasUID(java.lang.String classname) checks whether the given class contains a serialVersionUID
static boolean	isSerializable(java.lang.Class c) checks whether a class is serializable
static boolean	isSerializable(java.lang.String classname) checks whether a class is serializable
static void	main(java.lang.String[] args) Outputs information about a class on the commandline, takes class name as arguments
static boolean	needsUID(java.lang.Class c) checks whether a class needs to declare a serialVersionUID, i.e., it implements the java.io.Serializable interface but doesn't declare a serialVersionUID.
static boolean	needsUID(java.lang.String classname) checks whether a class needs to declare a serialVersionUID, i.e., it implements the java.io.Serializable interface but doesn't declare a serialVersionUID.
static java.lang.Object	read(java.io.InputStream stream) deserializes from the given stream and returns the object from it
static java.lang.Object	read(java.lang.String filename) deserializes the given file and returns the object from it
static void	write(java.io.OutputStream stream, java.lang.Object o) serializes the given object to the specified stream
static void	write(java.lang.String filename, java.lang.Object o) serializes the given object to the specified file

Methods inherited from class java.lang.Object

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

Field Detail

SERIAL_VERSION_UID

public static final java.lang.String SERIAL_VERSION_UID

the field name of serialVersionUID

See Also:

Constant Field Values

Constructor Detail

SerializationHelper

public SerializationHelper()

Method Detail

isSerializable

public static boolean isSerializable(java.lang.String classname)

checks whether a class is serializable

Parameters:

classname - the class to check

Returns:

true if the class or one of its ancestors implements the Serializable interface, otherwise false (also if the class cannot be loaded)

isSerializable

public static boolean isSerializable(java.lang.Class c)

checks whether a class is serializable

Parameters:

c - the class to check

Returns:

true if the class or one of its ancestors implements the Serializable interface, otherwise false

hasUID

public static boolean hasUID(java.lang.String classname)

checks whether the given class contains a serialVersionUID

Parameters:

classname - the class to check

Returns:

true if the class contains a serialVersionUID, otherwise false (also if the class is not implementing serializable or cannot be loaded)

hasUID

public static boolean hasUID(java.lang.Class c)

checks whether the given class contains a serialVersionUID

Parameters:

c - the class to check

Returns:

true if the class contains a serialVersionUID, otherwise false (also if the class is not implementing serializable)

needsUID

public static boolean needsUID(java.lang.String classname)

checks whether a class needs to declare a serialVersionUID, i.e., it implements the java.io.Serializable interface but doesn't declare a serialVersionUID.

Parameters:

classname - the class to check

Returns:

true if the class needs to declare one, false otherwise (also if the class cannot be loaded!)

needsUID

public static boolean needsUID(java.lang.Class c)

checks whether a class needs to declare a serialVersionUID, i.e., it implements the java.io.Serializable interface but doesn't declare a serialVersionUID.

Parameters:

c - the class to check

Returns:

true if the class needs to declare one, false otherwise

getUID

public static long getUID(java.lang.String classname)

reads or creates the serialVersionUID for the given class

Parameters:

classname - the class to get the serialVersionUID for

Returns:

the UID, 0L for non-serializable classes (or if the class cannot be loaded)

getUID

public static long getUID(java.lang.Class c)

reads or creates the serialVersionUID for the given class

Parameters:

c - the class to get the serialVersionUID for

Returns:

the UID, 0L for non-serializable classes

write

public static void write(java.lang.String filename,
                         java.lang.Object o)
                  throws java.lang.Exception

serializes the given object to the specified file

Parameters:

filename - the file to write the object to

o - the object to serialize

Throws:

java.lang.Exception - if serialization fails

write

public static void write(java.io.OutputStream stream,
                         java.lang.Object o)
                  throws java.lang.Exception

serializes the given object to the specified stream

Parameters:

stream - the stream to write the object to

o - the object to serialize

Throws:

java.lang.Exception - if serialization fails

read

public static java.lang.Object read(java.lang.String filename)
                             throws java.lang.Exception

deserializes the given file and returns the object from it

Parameters:

filename - the file to deserialize from

Returns:

the deserialized object

Throws:

java.lang.Exception - if deserialization fails

read

public static java.lang.Object read(java.io.InputStream stream)
                             throws java.lang.Exception

deserializes from the given stream and returns the object from it

Parameters:

stream - the stream to deserialize from

Returns:

the deserialized object

Throws:

java.lang.Exception - if deserialization fails

main

public static void main(java.lang.String[] args)

Outputs information about a class on the commandline, takes class name as arguments

Parameters:

args - the classnames to check