org.springframework.statemachine.processor.StateMachineActivatorAnnotationPostProcessor.java Source code

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Here is the source code for org.springframework.statemachine.processor.StateMachineActivatorAnnotationPostProcessor.java

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/*
 * Copyright 2015 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
 *
 * https://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.springframework.statemachine.processor;

import java.lang.annotation.Annotation;
import java.lang.reflect.Method;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.core.annotation.AnnotationUtils;
import org.springframework.core.annotation.Order;
import org.springframework.core.annotation.OrderUtils;

public class StateMachineActivatorAnnotationPostProcessor<T extends Annotation>
        implements MethodAnnotationPostProcessor<T> {

    protected final BeanFactory beanFactory;

    public StateMachineActivatorAnnotationPostProcessor(ListableBeanFactory beanFactory) {
        this.beanFactory = beanFactory;
    }

    @Override
    public Object postProcess(Class<?> beanClass, Object bean, String beanName, Method method, T metaAnnotation,
            Annotation annotation) {
        StateMachineHandler<T, Object, Object> handler = new StateMachineHandler<T, Object, Object>(beanClass, bean,
                method, metaAnnotation, annotation);

        Integer order = findOrder(bean, method);
        if (order != null) {
            handler.setOrder(order);
        }
        return handler;
    }

    /**
     * Find {@link Order} order either from a class or
     * method level. Method level always takes presence
     * over class level.
     *
     * @param bean the bean to inspect
     * @param method the method to inspect
     * @return the order or NULL if not found
     */
    private static Integer findOrder(Object bean, Method method) {
        Integer order = OrderUtils.getOrder(bean.getClass());
        Order ann = AnnotationUtils.findAnnotation(method, Order.class);
        if (ann != null) {
            order = ann.value();
        }
        return order;
    }

}