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Spring Data Relational support
/*
* Copyright 2019-2023 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.relational.core.sql;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
/**
* Abstract implementation to support {@link Segment} implementations.
*
* @author Mark Paluch
* @since 1.1
*/
abstract class AbstractSegment implements Segment {
private final Segment[] children;
protected AbstractSegment(Segment... children) {
this.children = children;
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.core.sql.Visitable#visit(org.springframework.data.relational.core.sql.Visitor)
*/
@Override
public void visit(Visitor visitor) {
Assert.notNull(visitor, "Visitor must not be null!");
visitor.enter(this);
for (Segment child : children) {
child.visit(visitor);
}
visitor.leave(this);
}
/*
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return toString().hashCode();
}
/*
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object obj) {
return obj instanceof Segment && toString().equals(obj.toString());
}
@Override
public String toString() {
return getClass().getSimpleName() + "(" + StringUtils.arrayToDelimitedString(children, ", ") + ")";
}
}