001/*
002 * Copyright 2002-2017 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.aop.support;
018
019import java.io.Serializable;
020
021import org.aopalliance.aop.Advice;
022
023import org.springframework.aop.PointcutAdvisor;
024import org.springframework.core.Ordered;
025import org.springframework.lang.Nullable;
026import org.springframework.util.ObjectUtils;
027
028/**
029 * Abstract base class for {@link org.springframework.aop.PointcutAdvisor}
030 * implementations. Can be subclassed for returning a specific pointcut/advice
031 * or a freely configurable pointcut/advice.
032 *
033 * @author Rod Johnson
034 * @author Juergen Hoeller
035 * @since 1.1.2
036 * @see AbstractGenericPointcutAdvisor
037 */
038@SuppressWarnings("serial")
039public abstract class AbstractPointcutAdvisor implements PointcutAdvisor, Ordered, Serializable {
040
041        @Nullable
042        private Integer order;
043
044
045        public void setOrder(int order) {
046                this.order = order;
047        }
048
049        @Override
050        public int getOrder() {
051                if (this.order != null) {
052                        return this.order;
053                }
054                Advice advice = getAdvice();
055                if (advice instanceof Ordered) {
056                        return ((Ordered) advice).getOrder();
057                }
058                return Ordered.LOWEST_PRECEDENCE;
059        }
060
061        @Override
062        public boolean isPerInstance() {
063                return true;
064        }
065
066
067        @Override
068        public boolean equals(@Nullable Object other) {
069                if (this == other) {
070                        return true;
071                }
072                if (!(other instanceof PointcutAdvisor)) {
073                        return false;
074                }
075                PointcutAdvisor otherAdvisor = (PointcutAdvisor) other;
076                return (ObjectUtils.nullSafeEquals(getAdvice(), otherAdvisor.getAdvice()) &&
077                                ObjectUtils.nullSafeEquals(getPointcut(), otherAdvisor.getPointcut()));
078        }
079
080        @Override
081        public int hashCode() {
082                return PointcutAdvisor.class.hashCode();
083        }
084
085}