org.springframework.data.domain.Persistable Maven / Gradle / Ivy
/*
* Copyright 2008-2023 the original author or authors.
*
* 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
*
* https://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.springframework.data.domain;
import org.springframework.lang.Nullable;
/**
* Simple interface for entities.
*
* Note that methods declared in this interface ({@link #getId()} and {@link #isNew()}) become property accessors when
* implementing this interface in combination with
* {@link org.springframework.data.annotation.AccessType @AccessType(PROPERTY)}. Either of these can be marked as
* transient when annotated with {@link org.springframework.data.annotation.Transient @Transient}.
*
* @param the type of the identifier
* @author Oliver Gierke
* @author Christoph Strobl
* @author Mark Paluch
*/
public interface Persistable {
/**
* Returns the id of the entity.
*
* @return the id. Can be {@literal null}.
*/
@Nullable
ID getId();
/**
* Returns if the {@code Persistable} is new or was persisted already.
*
* @return if {@literal true} the object is new.
*/
boolean isNew();
}