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Spring Data Relational support
/*
* Copyright 2020-2023 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 java.util.Collections;
import java.util.Iterator;
import java.util.function.UnaryOperator;
import org.springframework.util.Assert;
/**
* Default {@link SqlIdentifier} implementation using a {@code name} and whether the identifier is quoted.
*
* @author Jens Schauder
* @author Mark Paluch
* @since 2.0
*/
class DefaultSqlIdentifier implements SqlIdentifier {
private final String name;
private final boolean quoted;
DefaultSqlIdentifier(String name, boolean quoted) {
Assert.hasText(name, "A database object name must not be null or empty");
this.name = name;
this.quoted = quoted;
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.domain.SqlIdentifier#iterator()
*/
@Override
public Iterator iterator() {
return Collections. singleton(this).iterator();
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.domain.SqlIdentifier#transform(java.util.function.UnaryOperator)
*/
@Override
public SqlIdentifier transform(UnaryOperator transformationFunction) {
Assert.notNull(transformationFunction, "Transformation function must not be null");
return new DefaultSqlIdentifier(transformationFunction.apply(name), quoted);
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.domain.SqlIdentifier#toSql(org.springframework.data.relational.domain.IdentifierProcessing)
*/
@Override
public String toSql(IdentifierProcessing processing) {
return quoted ? processing.quote(getReference(processing)) : getReference(processing);
}
/*
* (non-Javadoc)
* @see org.springframework.data.relational.domain.SqlIdentifier#getReference(org.springframework.data.relational.domain.IdentifierProcessing)
*/
@Override
public String getReference(IdentifierProcessing processing) {
return name;
}
/*
* (non-Javadoc)
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o instanceof SqlIdentifier) {
return toString().equals(o.toString());
}
return false;
}
/*
* (non-Javadoc)
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return toString().hashCode();
}
/*
* (non-Javadoc)
* @see java.lang.Object#toString()
*/
@Override
public String toString() {
return quoted ? toSql(IdentifierProcessing.ANSI) : this.name;
}
}