com.phloc.commons.callback.IChangeNotify Maven / Gradle / Ivy
/**
* Copyright (C) 2006-2014 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* 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 com.phloc.commons.callback;
import java.io.Serializable;
import javax.annotation.Nonnull;
import com.phloc.commons.state.EContinue;
/**
* Simple notification interface.
*
* @author Philip Helger
* @param
* The type of object that is changed
*/
public interface IChangeNotify extends Serializable
{
/**
* Called before the object will be changed.
*
* @param aObjectToChange
* The object to be changed. Never null.
* @return {@link EContinue#CONTINUE} if the action may be performed. If the
* return value is {@link EContinue#BREAK} the action will not be
* performed.
*/
@Nonnull
EContinue beforeChange (@Nonnull DATATYPE aObjectToChange);
/**
* Called after the object changed.
*
* @param aChangedObject
* The changed object. Never null.
*/
void afterChange (@Nonnull DATATYPE aChangedObject);
}