spring CodecConfigurerFactory 源码
spring CodecConfigurerFactory 代码
文件路径：/spring-web/src/main/java/org/springframework/http/codec/CodecConfigurerFactory.java
/*
* Copyright 2002-2018 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.http.codec;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import org.springframework.beans.BeanUtils;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.support.PropertiesLoaderUtils;
import org.springframework.util.ClassUtils;
/**
* Internal delegate for loading the default codec configurer class names.
* Models a loose relationship with the default implementations in the support
* package, literally only needing to know the default class name to use.
*
* @author Juergen Hoeller
* @since 5.0.1
* @see ClientCodecConfigurer#create()
* @see ServerCodecConfigurer#create()
*/
final class CodecConfigurerFactory {
private static final String DEFAULT_CONFIGURERS_PATH = "CodecConfigurer.properties";
private static final Map<Class<?>, Class<?>> defaultCodecConfigurers = new HashMap<>(4);
static {
try {
Properties props = PropertiesLoaderUtils.loadProperties(
new ClassPathResource(DEFAULT_CONFIGURERS_PATH, CodecConfigurerFactory.class));
for (String ifcName : props.stringPropertyNames()) {
String implName = props.getProperty(ifcName);
Class<?> ifc = ClassUtils.forName(ifcName, CodecConfigurerFactory.class.getClassLoader());
Class<?> impl = ClassUtils.forName(implName, CodecConfigurerFactory.class.getClassLoader());
defaultCodecConfigurers.put(ifc, impl);
}
}
catch (IOException | ClassNotFoundException ex) {
throw new IllegalStateException(ex);
}
}
private CodecConfigurerFactory() {
}
@SuppressWarnings("unchecked")
public static <T extends CodecConfigurer> T create(Class<T> ifc) {
Class<?> impl = defaultCodecConfigurers.get(ifc);
if (impl == null) {
throw new IllegalStateException("No default codec configurer found for " + ifc);
}
return (T) BeanUtils.instantiateClass(impl);
}
}
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