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Spring Data Relational support
/*
* Copyright 2019-2022 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.relational.core.sql;
import org.springframework.util.Assert;
/**
* Interface for implementations that wish to be visited by a {@link Visitor}.
*
* @author Mark Paluch
* @since 1.1
* @see Visitor
*/
public interface Visitable {
/**
* Accept a {@link Visitor} visiting this {@link Visitable} and its nested {@link Visitable}s if applicable.
*
* @param visitor the visitor to notify, must not be {@literal null}.
*/
default void visit(Visitor visitor) {
Assert.notNull(visitor, "Visitor must not be null!");
visitor.enter(this);
visitor.leave(this);
}
}