package com.artfess.activiti.cmd;

import org.activiti.engine.impl.cmd.NeedsActiveTaskCmd;
import org.activiti.engine.impl.interceptor.CommandContext;
import org.activiti.engine.impl.persistence.entity.TaskEntity;

/**
 * 设置用户任务。
 * <pre>
 * 如果任务执行人就是当前人，则直接返回,不做处理。
 * </pre>
 * <pre>
 * 构建组：x5-bpmx-activiti
 * 作者：ray
 * 邮箱:zhangyg@jee-soft.cn
 * 日期:2014-9-19-下午12:05:43
 * 版权：广州宏天软件有限公司版权所有
 * </pre>
 */
public class SetAssigneeCmd extends NeedsActiveTaskCmd<Void> {

    /**
     * serialVersionUID:
     *
     * @since 1.0.0
     */
    private static final long serialVersionUID = 7601625963655262976L;

    protected String userId;

    public SetAssigneeCmd(String taskId, String userId) {
        super(taskId);
        this.userId = userId;
    }

    @Override
    protected Void execute(CommandContext commandContext, TaskEntity task) {
        if (userId != null) {
            if (task.getAssignee() != null && userId.equals(task.getAssignee())) {
                return null;
            }
            task.setAssignee(userId, true, true);
        } else {
            task.setAssignee(null);
        }
        // Add claim time
        commandContext.getHistoryManager().recordTaskClaim(taskId);
        return null;
    }

}