com.googlecode.starflow.engine.core.participant.impl.ActLogicParticipantMode.java Source code

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/*
 * Copyright 2010-2011 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
 * limitations under the License.
 */

package com.googlecode.starflow.engine.core.participant.impl;

import java.lang.reflect.Method;
import java.util.List;

import org.springframework.beans.BeanUtils;

import com.googlecode.starflow.core.util.ApplicationContextHolder;
import com.googlecode.starflow.engine.ProcessEngineException;
import com.googlecode.starflow.engine.core.participant.ParticipantMode;
import com.googlecode.starflow.engine.event.AbstractFlowEvent;
import com.googlecode.starflow.engine.model.Participant;
import com.googlecode.starflow.engine.model.ProcessInstance;
import com.googlecode.starflow.engine.model.elements.ActivityElement;
import com.googlecode.starflow.service.spi.IParticipantService;

/**
 * 
 * @author libinsong1204@gmail.com
 * @version 1.0
 */
public class ActLogicParticipantMode implements ParticipantMode {

    @SuppressWarnings("unchecked")
    public List<Participant> creatParticipants(AbstractFlowEvent event, ActivityElement activityXml) {
        ProcessInstance cloneProcessInstance = new ProcessInstance();
        BeanUtils.copyProperties(event.getProcessInstance(), cloneProcessInstance);
        String beanName = activityXml.getParticiLogic();
        List<Participant> participants;
        try {
            //beanName ????IToolAppAction.execute
            int index = beanName.indexOf("#");
            IParticipantService action = ApplicationContextHolder.getBean(beanName, IParticipantService.class);
            if (index == -1) {
                participants = action.createWorkItemParticipants(cloneProcessInstance);
            } else {
                //??bean
                String methodName = beanName.substring(index + 1);
                if ("".equals(beanName))
                    throw new ProcessEngineException(
                            "IParticipantService Bean" + beanName + "??");

                beanName = beanName.substring(0, index);
                try {
                    Method method = action.getClass().getMethod(methodName, long.class, long.class);
                    participants = (List<Participant>) method.invoke(action, cloneProcessInstance);
                } catch (Exception e) {
                    throw new ProcessEngineException(
                            "IParticipantService Bean" + beanName + "", e);
                }
            }
        } catch (Exception e) {
            throw new ProcessEngineException("??", e);
        }

        return participants;
    }

}