/**
* Copyright 2010 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.waveprotocol.wave.model.adt.docbased;
import org.waveprotocol.wave.model.document.util.DocumentEventRouter;
/**
* A factory for abstract types which adapt document elements.
*
* {@link #createInitializer} provides translation from an abstract object
* Initializer into an initializer of document state.
* {@link #adapt(DocumentEventRouter, Object)} then provides a translation
* from document state into an abstract type.
*
* @author anorth@google.com (Alex North)
* @param <E> document element type
* @param <T> abstract type of objects created
* @param <I> type of object state initializer
*/
public interface Factory<E, T, I> {
/**
* Creates an abstract object for a document element. The document and element
* must not be modified by this method.
*
* @param router the document event router supporting the object
* @param element the element node to adapt
* @return an abstract element backed by the document element
*/
T adapt(DocumentEventRouter<? super E, E, ?> router, E element);
/**
* Creates an initializer of document state from an abstract object
* Initializer.
*
* @param initialState initial element state (may be null)
*/
Initializer createInitializer(I initialState);
}