001/*
002 * Copyright 2002-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      https://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.core.convert.support;
018
019import java.util.Set;
020
021import org.springframework.core.convert.converter.Converter;
022import org.springframework.core.convert.converter.ConverterFactory;
023import org.springframework.core.convert.converter.ConverterRegistry;
024import org.springframework.core.convert.converter.GenericConverter;
025import org.springframework.lang.Nullable;
026
027/**
028 * A factory for common {@link org.springframework.core.convert.ConversionService}
029 * configurations.
030 *
031 * @author Keith Donald
032 * @author Juergen Hoeller
033 * @author Chris Beams
034 * @since 3.0
035 */
036public final class ConversionServiceFactory {
037
038        private ConversionServiceFactory() {
039        }
040
041
042        /**
043         * Register the given Converter objects with the given target ConverterRegistry.
044         * @param converters the converter objects: implementing {@link Converter},
045         * {@link ConverterFactory}, or {@link GenericConverter}
046         * @param registry the target registry
047         */
048        public static void registerConverters(@Nullable Set<?> converters, ConverterRegistry registry) {
049                if (converters != null) {
050                        for (Object converter : converters) {
051                                if (converter instanceof GenericConverter) {
052                                        registry.addConverter((GenericConverter) converter);
053                                }
054                                else if (converter instanceof Converter<?, ?>) {
055                                        registry.addConverter((Converter<?, ?>) converter);
056                                }
057                                else if (converter instanceof ConverterFactory<?, ?>) {
058                                        registry.addConverterFactory((ConverterFactory<?, ?>) converter);
059                                }
060                                else {
061                                        throw new IllegalArgumentException("Each converter object must implement one of the " +
062                                                        "Converter, ConverterFactory, or GenericConverter interfaces");
063                                }
064                        }
065                }
066        }
067
068}