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.annotation;
018
019import java.io.Serializable;
020import java.lang.reflect.AnnotatedElement;
021import java.util.ArrayList;
022import java.util.List;
023
024import org.springframework.core.annotation.AnnotatedElementUtils;
025import org.springframework.core.annotation.AnnotationAttributes;
026import org.springframework.core.annotation.AnnotationUtils;
027import org.springframework.lang.Nullable;
028import org.springframework.transaction.interceptor.NoRollbackRuleAttribute;
029import org.springframework.transaction.interceptor.RollbackRuleAttribute;
030import org.springframework.transaction.interceptor.RuleBasedTransactionAttribute;
031import org.springframework.transaction.interceptor.TransactionAttribute;
032
033/**
034 * Strategy implementation for parsing Spring's {@link Transactional} annotation.
035 *
036 * @author Juergen Hoeller
037 * @since 2.5
038 */
039@SuppressWarnings("serial")
040public class SpringTransactionAnnotationParser implements TransactionAnnotationParser, Serializable {
041
042        @Override
043        public boolean isCandidateClass(Class<?> targetClass) {
044                return AnnotationUtils.isCandidateClass(targetClass, Transactional.class);
045        }
046
047        @Override
048        @Nullable
049        public TransactionAttribute parseTransactionAnnotation(AnnotatedElement element) {
050                AnnotationAttributes attributes = AnnotatedElementUtils.findMergedAnnotationAttributes(
051                                element, Transactional.class, false, false);
052                if (attributes != null) {
053                        return parseTransactionAnnotation(attributes);
054                }
055                else {
056                        return null;
057                }
058        }
059
060        public TransactionAttribute parseTransactionAnnotation(Transactional ann) {
061                return parseTransactionAnnotation(AnnotationUtils.getAnnotationAttributes(ann, false, false));
062        }
063
064        protected TransactionAttribute parseTransactionAnnotation(AnnotationAttributes attributes) {
065                RuleBasedTransactionAttribute rbta = new RuleBasedTransactionAttribute();
066
067                Propagation propagation = attributes.getEnum("propagation");
068                rbta.setPropagationBehavior(propagation.value());
069                Isolation isolation = attributes.getEnum("isolation");
070                rbta.setIsolationLevel(isolation.value());
071                rbta.setTimeout(attributes.getNumber("timeout").intValue());
072                rbta.setReadOnly(attributes.getBoolean("readOnly"));
073                rbta.setQualifier(attributes.getString("value"));
074
075                List<RollbackRuleAttribute> rollbackRules = new ArrayList<>();
076                for (Class<?> rbRule : attributes.getClassArray("rollbackFor")) {
077                        rollbackRules.add(new RollbackRuleAttribute(rbRule));
078                }
079                for (String rbRule : attributes.getStringArray("rollbackForClassName")) {
080                        rollbackRules.add(new RollbackRuleAttribute(rbRule));
081                }
082                for (Class<?> rbRule : attributes.getClassArray("noRollbackFor")) {
083                        rollbackRules.add(new NoRollbackRuleAttribute(rbRule));
084                }
085                for (String rbRule : attributes.getStringArray("noRollbackForClassName")) {
086                        rollbackRules.add(new NoRollbackRuleAttribute(rbRule));
087                }
088                rbta.setRollbackRules(rollbackRules);
089
090                return rbta;
091        }
092
093
094        @Override
095        public boolean equals(@Nullable Object other) {
096                return (this == other || other instanceof SpringTransactionAnnotationParser);
097        }
098
099        @Override
100        public int hashCode() {
101                return SpringTransactionAnnotationParser.class.hashCode();
102        }
103
104}