spring PersistenceExceptionTranslator 源码
spring PersistenceExceptionTranslator 代码
文件路径：/spring-tx/src/main/java/org/springframework/dao/support/PersistenceExceptionTranslator.java
/*
* Copyright 2002-2016 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.dao.support;
import org.springframework.dao.DataAccessException;
import org.springframework.lang.Nullable;
/**
* Interface implemented by Spring integrations with data access technologies
* that throw runtime exceptions, such as JPA and Hibernate.
*
* <p>This allows consistent usage of combined exception translation functionality,
* without forcing a single translator to understand every single possible type
* of exception.
*
* @author Rod Johnson
* @author Juergen Hoeller
* @since 2.0
*/
@FunctionalInterface
public interface PersistenceExceptionTranslator {
/**
* Translate the given runtime exception thrown by a persistence framework to a
* corresponding exception from Spring's generic
* {@link org.springframework.dao.DataAccessException} hierarchy, if possible.
* <p>Do not translate exceptions that are not understood by this translator:
* for example, if coming from another persistence framework, or resulting
* from user code or otherwise unrelated to persistence.
* <p>Of particular importance is the correct translation to
* DataIntegrityViolationException, for example on constraint violation.
* Implementations may use Spring JDBC's sophisticated exception translation
* to provide further information in the event of SQLException as a root cause.
* @param ex a RuntimeException to translate
* @return the corresponding DataAccessException (or {@code null} if the
* exception could not be translated, as in this case it may result from
* user code rather than from an actual persistence problem)
* @see org.springframework.dao.DataIntegrityViolationException
* @see org.springframework.jdbc.support.SQLExceptionTranslator
*/
@Nullable
DataAccessException translateExceptionIfPossible(RuntimeException ex);
}
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