org.jooq.Converters Maven / Gradle / Ivy
/**
* Copyright (c) 2009-2014, Data Geekery GmbH (http://www.datageekery.com)
* All rights reserved.
*
* This work is dual-licensed
* - under the Apache Software License 2.0 (the "ASL")
* - under the jOOQ License and Maintenance Agreement (the "jOOQ License")
* =============================================================================
* You may choose which license applies to you:
*
* - If you're using this work with Open Source databases, you may choose
* either ASL or jOOQ License.
* - If you're using this work with at least one commercial database, you must
* choose jOOQ License
*
* For more information, please visit http://www.jooq.org/licenses
*
* Apache Software License 2.0:
* -----------------------------------------------------------------------------
* 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.
*
* jOOQ License and Maintenance Agreement:
* -----------------------------------------------------------------------------
* Data Geekery grants the Customer the non-exclusive, timely limited and
* non-transferable license to install and use the Software under the terms of
* the jOOQ License and Maintenance Agreement.
*
* This library is distributed with a LIMITED WARRANTY. See the jOOQ License
* and Maintenance Agreement for more details: http://www.jooq.org/licensing
*/
package org.jooq;
import org.jooq.impl.SQLDataType;
/**
* A chain of converters.
*
* @param The database type - i.e. any type available from
* {@link SQLDataType}
* @param The user type
* @author Lukas Eder
*/
@SuppressWarnings({ "rawtypes", "unchecked" })
public class Converters implements Converter {
/**
* Generated UID
*/
private static final long serialVersionUID = -4307758248063822630L;
final Converter[] chain;
/**
* Create an identity converter.
*/
public static Converter of() {
return new Converters();
}
/**
* Create a single converter.
*/
public static Converter of(Converter converter) {
return new Converters(converter);
}
/**
* Chain two converters.
*/
public static Converter of(Converter c1, Converter c2) {
return new Converters(c1, c2);
}
/**
* Chain three converters.
*/
public static Converter of(Converter c1, Converter c2, Converter c3) {
return new Converters(c1, c2, c3);
}
/**
* Chain four converters.
*/
public static Converter of(Converter c1, Converter c2, Converter c3, Converter c4) {
return new Converters(c1, c2, c3, c4);
}
Converters(Converter... chain) {
this.chain = chain == null ? new Converter[0] : chain;
}
@Override
public final U from(T t) {
Object result = t;
for (int i = 0; i < chain.length; i++)
result = chain[i].from(result);
return (U) result;
}
@Override
public final T to(U u) {
Object result = u;
for (int i = chain.length - 1; i >= 0; i--)
result = chain[i].to(result);
return (T) result;
}
@Override
public final Class fromType() {
return chain[0].fromType();
}
@Override
public final Class toType() {
return chain[chain.length - 1].toType();
}
}