spring ConversionServiceFactory 源码
spring ConversionServiceFactory 代码
文件路径：/spring-core/src/main/java/org/springframework/core/convert/support/ConversionServiceFactory.java
/*
* Copyright 2002-2022 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.core.convert.support;
import java.util.Set;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;
import org.springframework.core.convert.converter.ConverterRegistry;
import org.springframework.core.convert.converter.GenericConverter;
import org.springframework.lang.Nullable;
/**
* A factory for common {@link org.springframework.core.convert.ConversionService}
* configurations.
*
* @author Keith Donald
* @author Juergen Hoeller
* @author Chris Beams
* @since 3.0
*/
public final class ConversionServiceFactory {
private ConversionServiceFactory() {
}
/**
* Register the given Converter objects with the given target ConverterRegistry.
* @param converters the converter objects: implementing {@link Converter},
* {@link ConverterFactory}, or {@link GenericConverter}
* @param registry the target registry
*/
public static void registerConverters(@Nullable Set<?> converters, ConverterRegistry registry) {
if (converters != null) {
for (Object candidate : converters) {
if (candidate instanceof GenericConverter genericConverter) {
registry.addConverter(genericConverter);
}
else if (candidate instanceof Converter<?, ?> converter) {
registry.addConverter(converter);
}
else if (candidate instanceof ConverterFactory<?, ?> converterFactory) {
registry.addConverterFactory(converterFactory);
}
else {
throw new IllegalArgumentException("Each converter object must implement one of the " +
"Converter, ConverterFactory, or GenericConverter interfaces");
}
}
}
}
}
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