com.querydsl.sql.namemapping.ChangeLetterCaseNameMapping Maven / Gradle / Ivy
/*
* Copyright 2018, The Querydsl Team (http://www.querydsl.com/team)
*
* 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
* http://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 com.querydsl.sql.namemapping;
import java.util.Locale;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.querydsl.sql.SchemaAndTable;
/**
* Simple implementation of {@link NameMapping} that changes the letter-case
* (lower-case or upper-case) of the schema, table and column names. The
* information how the database stores the identifiers are available normally
* from the stores*Identifiers function of the
* {@link java.sql.DatabaseMetaData}
*/
public class ChangeLetterCaseNameMapping implements NameMapping {
/**
* The target character-case (lower or upper) that the
* {@link ChangeLetterCaseNameMapping} should use to convert the identifiers
* names.
*/
public enum LetterCase {
LOWER, UPPER
}
private Locale locale;
private final LetterCase targetCase;
/**
* Constructor.
* @param targetCase The characters of all table and column names will be converted to the specified letter-case.
* @param locale The locale that is used for the letter-case conversion.
*/
public ChangeLetterCaseNameMapping(LetterCase targetCase, Locale locale) {
this.locale = Preconditions.checkNotNull(locale);
this.targetCase = Preconditions.checkNotNull(targetCase);
}
@Override
public Optional getColumnOverride(SchemaAndTable key, String column) {
return Optional.of(targetCaseOrNull(column));
}
@Override
public Optional getOverride(SchemaAndTable key) {
return Optional.of(new SchemaAndTable(targetCaseOrNull(key.getSchema()), targetCaseOrNull(key.getTable())));
}
private String targetCaseOrNull(String text) {
if (targetCase == LetterCase.LOWER) {
return text.toLowerCase(locale);
} else {
return text.toUpperCase(locale);
}
}
}