io.prestosql.orc.protobuf.Extension Maven / Gradle / Ivy
// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
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package io.prestosql.orc.protobuf;
/**
* Interface that generated extensions implement.
*
* @author [email protected] (Jisi Liu)
*/
public abstract class Extension
extends ExtensionLite {
/** Returns the descriptor of the extension. */
public abstract Descriptors.FieldDescriptor getDescriptor();
/** Returns whether or not this extension is a Lite Extension. */
@Override
final boolean isLite() {
return false;
}
// All the methods below are extension implementation details.
/**
* The API type that the extension is used for.
*/
protected enum ExtensionType {
IMMUTABLE,
MUTABLE,
PROTO1,
}
protected ExtensionType getExtensionType() {
// TODO(liujisi): make this abstract after we fix proto1.
return ExtensionType.IMMUTABLE;
}
/**
* Type of a message extension.
*/
public enum MessageType {
PROTO1,
PROTO2,
}
/**
* If the extension is a message extension (i.e., getLiteType() == MESSAGE),
* returns the type of the message, otherwise undefined.
*/
public MessageType getMessageType() {
return MessageType.PROTO2;
}
protected abstract Object fromReflectionType(Object value);
protected abstract Object singularFromReflectionType(Object value);
protected abstract Object toReflectionType(Object value);
protected abstract Object singularToReflectionType(Object value);
}