/**
* Copyright 2008 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.operation;
import org.waveprotocol.wave.model.operation.Operation;
import org.waveprotocol.wave.model.operation.OperationException;
import java.util.List;
/**
* This represents an operation that is able to return the reverse operation of
* itself after application.
*
*
* @param <O> The Operation Class
* @param <T> The Class on which apply() and applyAndReturnReverse() can be called.
*/
public interface ReversibleOperation<O extends Operation<T>, T> extends Operation<T> {
/**
* Applies the operation to a target and returns a sequence of operations
* which can reverse the application.
*
* @param target The target onto which to apply the operation.
* @return A sequence of operations that reverses the application of this
* operation. The returned sequence of operations, when applied in
* order after this operation is applied, should reverse the effect of
* this operation.
*/
public List<? extends O> applyAndReturnReverse(T target) throws OperationException;
}