001/* 002 * Copyright 2002-2019 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.transaction.interceptor; 018 019import java.io.Serializable; 020import java.lang.reflect.Method; 021 022import org.springframework.util.Assert; 023 024/** 025 * Composite {@link TransactionAttributeSource} implementation that iterates 026 * over a given array of {@link TransactionAttributeSource} instances. 027 * 028 * @author Juergen Hoeller 029 * @since 2.0 030 */ 031@SuppressWarnings("serial") 032public class CompositeTransactionAttributeSource implements TransactionAttributeSource, Serializable { 033 034 private final TransactionAttributeSource[] transactionAttributeSources; 035 036 037 /** 038 * Create a new CompositeTransactionAttributeSource for the given sources. 039 * @param transactionAttributeSources the TransactionAttributeSource instances to combine 040 */ 041 public CompositeTransactionAttributeSource(TransactionAttributeSource... transactionAttributeSources) { 042 Assert.notNull(transactionAttributeSources, "TransactionAttributeSource array must not be null"); 043 this.transactionAttributeSources = transactionAttributeSources; 044 } 045 046 /** 047 * Return the TransactionAttributeSource instances that this 048 * CompositeTransactionAttributeSource combines. 049 */ 050 public final TransactionAttributeSource[] getTransactionAttributeSources() { 051 return this.transactionAttributeSources; 052 } 053 054 055 @Override 056 public TransactionAttribute getTransactionAttribute(Method method, Class<?> targetClass) { 057 for (TransactionAttributeSource source : this.transactionAttributeSources) { 058 TransactionAttribute attr = source.getTransactionAttribute(method, targetClass); 059 if (attr != null) { 060 return attr; 061 } 062 } 063 return null; 064 } 065 066}