com.tangosol.io.Serializer Maven / Gradle / Ivy
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/*
* Copyright (c) 2000, 2020, Oracle and/or its affiliates.
*
* Licensed under the Universal Permissive License v 1.0 as shown at
* http://oss.oracle.com/licenses/upl.
*/
package com.tangosol.io;
import java.io.IOException;
import javax.inject.Named;
/**
* The Serializer interface provides the capability of reading and writing a
* Java object from and to an in-memory buffer.
*
* Serializer implementations should implement the ClassLoaderAware interface if
* they need access to a ClassLoader. However, to support hot-deploying
* containers, it is important that a Serializer not hold any strong
* references to that ClassLoader, or to any Class objects obtained from that
* ClassLoader.
*
* Note: it is extremely important that objects that are equivalent
* according to their "equals()" implementation produce equivalent serialized
* streams. Violating this relationship will result in non-deterministic
* behavior for many Coherence services.
*
* @author cp/jh 2007.07.21
* @see ReadBuffer
* @see WriteBuffer
* @since Coherence 3.2
*/
public interface Serializer
{
/**
* Serialize an object to a WriteBuffer by writing its state using the
* specified BufferOutput object.
*
* Note: Starting with Coherence 12.2.1 classes that need to designate
* an alternative object to be used by the Serializer when writing the object
* to the buffer should implement the {@link SerializationSupport#writeReplace()}
* method.
*
* @param out the BufferOutput with which to write the object's state
* @param o the object to serialize
*
* @throws IOException if an I/O error occurs
*/
void serialize(WriteBuffer.BufferOutput out, Object o)
throws IOException;
/**
* Deserialize an object from a ReadBuffer by reading its state using the
* specified BufferInput object.
*
* Note: Starting with Coherence 12.2.1 classes that need to designate
* an alternative object to be returned by the Serializer after an object is
* deserialized from the buffer should implement the
* {@link SerializationSupport#readResolve()} method.
*
* @param in the BufferInput with which to read the object's state
*
* @return the deserialized user type instance
*
* @throws IOException if an I/O error occurs
*/
default Object deserialize(ReadBuffer.BufferInput in)
throws IOException
{
return deserialize(in, Object.class);
}
/**
* Deserialize an object as an instance of the specified class by reading
* its state using the specified BufferInput object.
*
* Note: Starting with Coherence 12.2.1 classes that need to designate
* an alternative object to be returned by the Serializer after an object is
* deserialized from the buffer should implement the
* {@link SerializationSupport#readResolve()} method.
*
* @param the class to deserialize to
* @param in the BufferInput with which to read the object's state
* @param clazz the type of the object to deserialize
*
* @return the deserialized user type instance
*
* @throws IOException if an I/O error occurs
*
* @since Coherence 19.1.0.0
*/
@SuppressWarnings("unchecked")
default T deserialize(ReadBuffer.BufferInput in, Class clazz)
throws IOException
{
return (T) deserialize(in);
}
/**
* Return the name of this serializer.
*
* @return the name of this serializer
*
* @since Coherence 19.1.0.0
*/
default String getName()
{
Named named = getClass().getAnnotation(Named.class);
return named == null ? null : named.value();
}
}