spring JaxbContextContainer 源码
spring JaxbContextContainer 代码
文件路径：/spring-web/src/main/java/org/springframework/http/codec/xml/JaxbContextContainer.java
/*
* Copyright 2002-2019 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.xml;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import jakarta.xml.bind.JAXBContext;
import jakarta.xml.bind.JAXBException;
import jakarta.xml.bind.Marshaller;
import jakarta.xml.bind.Unmarshaller;
import org.springframework.core.codec.CodecException;
/**
* Holder for {@link JAXBContext} instances.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 5.0
*/
final class JaxbContextContainer {
private final ConcurrentMap<Class<?>, JAXBContext> jaxbContexts = new ConcurrentHashMap<>(64);
public Marshaller createMarshaller(Class<?> clazz) throws CodecException, JAXBException {
JAXBContext jaxbContext = getJaxbContext(clazz);
return jaxbContext.createMarshaller();
}
public Unmarshaller createUnmarshaller(Class<?> clazz) throws CodecException, JAXBException {
JAXBContext jaxbContext = getJaxbContext(clazz);
return jaxbContext.createUnmarshaller();
}
private JAXBContext getJaxbContext(Class<?> clazz) throws CodecException {
return this.jaxbContexts.computeIfAbsent(clazz, key -> {
try {
return JAXBContext.newInstance(clazz);
}
catch (JAXBException ex) {
throw new CodecException(
"Could not create JAXBContext for class [" + clazz + "]: " + ex.getMessage(), ex);
}
});
}
}
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