/*
* Copyright 2010 The myBatis Team
*
* 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
*
* http://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.mybatis.spring;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.apache.ibatis.exceptions.PersistenceException;
import org.springframework.dao.DataAccessException;
import org.springframework.dao.support.PersistenceExceptionTranslator;
import org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator;
import org.springframework.jdbc.support.SQLExceptionTranslator;
/**
* Default exception translator.
*
* Translates MyBatis SqlSession returned exception into a Spring
* {@code DataAccessException} using Spring's {@code SQLExceptionTranslator}
* Can load {@code SQLExceptionTranslator} eagerly of when the
* first exception is translated.
*
* @version $Id: MyBatisExceptionTranslator.java 3406 2010-12-20 17:58:31Z eduardo.macarron $
*/
public class MyBatisExceptionTranslator implements PersistenceExceptionTranslator {
private final DataSource dataSource;
private SQLExceptionTranslator exceptionTranslator;
/**
* Creates a new {@code DataAccessExceptionTranslator} instance.
*
* @param dataSource DataSource to use to find metadata and establish which error codes are usable.
* @param exceptionTranslatorLazyInit if true, the translator instantiates internal stuff only the first time will
* have the need to translate exceptions.
*/
public MyBatisExceptionTranslator(DataSource dataSource, boolean exceptionTranslatorLazyInit) {
this.dataSource = dataSource;
if (!exceptionTranslatorLazyInit) {
this.initExceptionTranslator();
}
}
/**
* {@inheritDoc}
*/
public DataAccessException translateExceptionIfPossible(RuntimeException e) {
if (e instanceof PersistenceException) {
// Batch exceptions come inside another PersistenceException
// recursion has a risk of infinite loop so better make another if
if (e.getCause() instanceof PersistenceException) {
e = (PersistenceException) e.getCause();
}
if (e.getCause() instanceof SQLException) {
this.initExceptionTranslator();
return this.exceptionTranslator.translate(e.getMessage() + "\n", null, (SQLException) e.getCause());
}
return new MyBatisSystemException(e);
} else {
return null;
}
}
/**
* Initializes the internal translator reference.
*/
private synchronized void initExceptionTranslator() {
if (this.exceptionTranslator == null) {
this.exceptionTranslator = new SQLErrorCodeSQLExceptionTranslator(this.dataSource);
}
}
}