/*
* Copyright (c) 2011 Google Inc.
*
* All rights reserved. This program and the accompanying materials are made available under the terms of the Eclipse
* Public License v1.0 which accompanies this distribution, and is available at
*
* http://www.eclipse.org/legal/epl-v10.html
*/
package com.google.eclipse.protobuf.model.util;
import com.google.eclipse.protobuf.protobuf.ExtensibleType;
import com.google.eclipse.protobuf.protobuf.ExtensibleTypeLink;
import com.google.eclipse.protobuf.protobuf.Message;
import com.google.eclipse.protobuf.protobuf.TypeExtension;
/**
* Utility methods related to <code>{@link TypeExtension}</code>s.
*
* @author alruiz@google.com (Alex Ruiz)
*/
public class TypeExtensions {
/**
* Returns the message from the given extension.
* @param extension the given extension.
* @return the message from the given extension, or {@code null} if the extension is not referring to a message.
*/
public Message messageFrom(TypeExtension extension) {
ExtensibleTypeLink link = extension.getType();
if (link == null) {
return null;
}
ExtensibleType type = link.getTarget();
return (type instanceof Message) ? (Message) type : null;
}
}