org.springframework.boot.orm.jpa.hibernate.SpringPhysicalNamingStrategy Maven / Gradle / Ivy
/*
* Copyright 2012-2017 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.boot.orm.jpa.hibernate;
import java.util.Locale;
import org.hibernate.boot.model.naming.Identifier;
import org.hibernate.boot.model.naming.PhysicalNamingStrategy;
import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;
/**
* Hibernate {@link PhysicalNamingStrategy} that follows Spring recommended naming
* conventions.
*
* @author Phillip Webb
* @author Madhura Bhave
* @since 1.4.0
*/
public class SpringPhysicalNamingStrategy implements PhysicalNamingStrategy {
@Override
public Identifier toPhysicalCatalogName(Identifier name,
JdbcEnvironment jdbcEnvironment) {
return apply(name, jdbcEnvironment);
}
@Override
public Identifier toPhysicalSchemaName(Identifier name,
JdbcEnvironment jdbcEnvironment) {
return apply(name, jdbcEnvironment);
}
@Override
public Identifier toPhysicalTableName(Identifier name,
JdbcEnvironment jdbcEnvironment) {
return apply(name, jdbcEnvironment);
}
@Override
public Identifier toPhysicalSequenceName(Identifier name,
JdbcEnvironment jdbcEnvironment) {
return apply(name, jdbcEnvironment);
}
@Override
public Identifier toPhysicalColumnName(Identifier name,
JdbcEnvironment jdbcEnvironment) {
return apply(name, jdbcEnvironment);
}
private Identifier apply(Identifier name, JdbcEnvironment jdbcEnvironment) {
if (name == null) {
return null;
}
StringBuilder builder = new StringBuilder(name.getText().replace('.', '_'));
for (int i = 1; i < builder.length() - 1; i++) {
if (isUnderscoreRequired(builder.charAt(i - 1), builder.charAt(i),
builder.charAt(i + 1))) {
builder.insert(i++, '_');
}
}
return getIdentifier(builder.toString(), name.isQuoted(), jdbcEnvironment);
}
/**
* Get an identifier for the specified details. By default this method will return an
* identifier with the name adapted based on the result of
* {@link #isCaseInsensitive(JdbcEnvironment)}
* @param name the name of the identifier
* @param quoted if the identifier is quoted
* @param jdbcEnvironment the JDBC environment
* @return an identifier instance
*/
protected Identifier getIdentifier(String name, boolean quoted,
JdbcEnvironment jdbcEnvironment) {
if (isCaseInsensitive(jdbcEnvironment)) {
name = name.toLowerCase(Locale.ROOT);
}
return new Identifier(name, quoted);
}
/**
* Specify whether the database is case sensitive.
* @param jdbcEnvironment the JDBC environment which can be used to determine case
* @return true if the database is case insensitive sensitivity
*/
protected boolean isCaseInsensitive(JdbcEnvironment jdbcEnvironment) {
return true;
}
private boolean isUnderscoreRequired(char before, char current, char after) {
return Character.isLowerCase(before) && Character.isUpperCase(current)
&& Character.isLowerCase(after);
}
}