Package com.vaadin.util

Class SerializerHelper

java.lang.Object

com.vaadin.util.SerializerHelper

public class SerializerHelper
extends Object

Helper class for performing serialization. Most of the methods are here are workarounds for problems in Google App Engine. Used internally by Vaadin and should not be used by application developers. Subject to change at any time.

Since:

6.0

Constructor Summary

Constructors

Constructor	Description
SerializerHelper()

Method Summary

Modifier and Type	Method	Description
static Class<?>	readClass(ObjectInputStream in)	Deserializes a class reference serialized by writeClass(ObjectOutputStream, Class).
static Class<?>[]	readClassArray(ObjectInputStream in)	Deserializes a class references serialized by writeClassArray(ObjectOutputStream, Class[]).
static Class<?>	resolveClass(String className)	Resolves the class given by className.
static void	writeClass(ObjectOutputStream out, Class<?> cls)	Serializes the class reference so readClass(ObjectInputStream) can deserialize it.
static void	writeClassArray(ObjectOutputStream out, Class<?>[] classes)	Serializes the class references so readClassArray(ObjectInputStream) can deserialize it.

Methods inherited from class java.lang.Object

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

Constructor Detail

SerializerHelper

public SerializerHelper()

Method Detail

writeClass

public static void writeClass(ObjectOutputStream out,
                              Class<?> cls)
                       throws IOException

Serializes the class reference so readClass(ObjectInputStream) can deserialize it. Supports null class references.

Parameters:

out - The ObjectOutputStream to serialize to.

cls - A class or null.

Throws:

IOException - Rethrows any IOExceptions from the ObjectOutputStream

writeClassArray

public static void writeClassArray(ObjectOutputStream out,
                                   Class<?>[] classes)
                            throws IOException

Serializes the class references so readClassArray(ObjectInputStream) can deserialize it. Supports null class arrays.

Parameters:

out - The ObjectOutputStream to serialize to.

classes - An array containing class references or null.

Throws:

IOException - Rethrows any IOExceptions from the ObjectOutputStream

readClassArray

public static Class<?>[] readClassArray(ObjectInputStream in)
                                 throws ClassNotFoundException,
                                        IOException

Deserializes a class references serialized by writeClassArray(ObjectOutputStream, Class[]). Supports null class arrays.

Parameters:

in - ObjectInputStream to read from.

Returns:

Class array with the class references or null.

Throws:

ClassNotFoundException - If one of the classes could not be resolved.

IOException - Rethrows IOExceptions from the ObjectInputStream

resolveClass

public static Class<?> resolveClass(String className)
                             throws ClassNotFoundException

Resolves the class given by className.

Parameters:

className - The fully qualified class name.

Returns:

A Class reference.

Throws:

ClassNotFoundException - If the class could not be resolved.

readClass

public static Class<?> readClass(ObjectInputStream in)
                          throws IOException,
                                 ClassNotFoundException

Deserializes a class reference serialized by writeClass(ObjectOutputStream, Class). Supports null class references.

Parameters:

in - ObjectInputStream to read from.

Returns:

Class reference to the resolved class

Throws:

ClassNotFoundException - If the class could not be resolved.

IOException - Rethrows IOExceptions from the ObjectInputStream