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/*
*
* Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
*
* 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.speedment.common.codegen.model.trait;
import java.util.Optional;
/**
* Trait for all models that has a parent. Models that are designed to be reused
* typically don't have a parent.
*
* If the model implementing this trait also implements {@link HasCopy}, then
* the parent property will not be copied when {@link HasCopy#copy()}
* is invoked.
*
* @param
the model type of the parent
* @param the extending type
*
* @author Emil Forslund
* @since 2.5
*/
public interface HasParent> {
/**
* Sets the parent of this model. This method should only be invoked by
* other models when they add a new child, it should not be invoked
* directly.
*
* @param parent the parent
* @return this instance
*/
T setParent(P parent);
/**
* Returns the parent model if one exists, otherwise an empty
* {@code Optional}.
*
* @return the parent node if one exists
*/
Optional
getParent();
}