/*
 * 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
 *
 *      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
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package org.springframework.transaction.annotation;

import org.springframework.context.annotation.AdviceMode;
import org.springframework.context.annotation.AdviceModeImportSelector;
import org.springframework.context.annotation.AutoProxyRegistrar;
import org.springframework.transaction.config.TransactionManagementConfigUtils;
import org.springframework.util.ClassUtils;

Selects which implementation of AbstractTransactionManagementConfiguration should be used based on the value of EnableTransactionManagement.mode on the importing @Configuration class.
Author:Chris Beams, Juergen Hoeller
See Also:
Since:3.1
/** * Selects which implementation of {@link AbstractTransactionManagementConfiguration} * should be used based on the value of {@link EnableTransactionManagement#mode} on the * importing {@code @Configuration} class. * * @author Chris Beams * @author Juergen Hoeller * @since 3.1 * @see EnableTransactionManagement * @see ProxyTransactionManagementConfiguration * @see TransactionManagementConfigUtils#TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME * @see TransactionManagementConfigUtils#JTA_TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME */
public class TransactionManagementConfigurationSelector extends AdviceModeImportSelector<EnableTransactionManagement> {
Returns ProxyTransactionManagementConfiguration or AspectJ(Jta)TransactionManagementConfiguration for PROXY and ASPECTJ values of EnableTransactionManagement.mode(), respectively.
/** * Returns {@link ProxyTransactionManagementConfiguration} or * {@code AspectJ(Jta)TransactionManagementConfiguration} for {@code PROXY} * and {@code ASPECTJ} values of {@link EnableTransactionManagement#mode()}, * respectively. */
@Override protected String[] selectImports(AdviceMode adviceMode) { switch (adviceMode) { case PROXY: return new String[] {AutoProxyRegistrar.class.getName(), ProxyTransactionManagementConfiguration.class.getName()}; case ASPECTJ: return new String[] {determineTransactionAspectClass()}; default: return null; } } private String determineTransactionAspectClass() { return (ClassUtils.isPresent("javax.transaction.Transactional", getClass().getClassLoader()) ? TransactionManagementConfigUtils.JTA_TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME : TransactionManagementConfigUtils.TRANSACTION_ASPECT_CONFIGURATION_CLASS_NAME); } }