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Module contains external API of the evitaDB.
/*
*
* _ _ ____ ____
* _____ _(_) |_ __ _| _ \| __ )
* / _ \ \ / / | __/ _` | | | | _ \
* | __/\ V /| | || (_| | |_| | |_) |
* \___| \_/ |_|\__\__,_|____/|____/
*
* Copyright (c) 2023-2024
*
* Licensed under the Business Source License, Version 1.1 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://github.com/FgForrest/evitaDB/blob/master/LICENSE
*
* 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 io.evitadb.api.requestResponse.schema;
/**
* In EvitaDB we define only one-way relationship from the perspective of the entity. We stick to the ERD modelling
* standards here.
*
* TOBEDONE JNO #501 - verify cardinality at the end of the transaction / warm-up
*
* @author Jan Novotný ([email protected]), FG Forrest a.s. (c) 2022
*/
public enum Cardinality {
/**
* Relation may be missing completely, but if it exists - there is never more than single relation of this type.
*/
ZERO_OR_ONE,
/**
* There is always single relation of this type.
*/
EXACTLY_ONE,
/**
* Relation may be missing completely, but there may be also one or more relations of this type.
*/
ZERO_OR_MORE,
/**
* There is always at least one relation of this type, but there may be also more than one.
*/
ONE_OR_MORE
}