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• StateHelper.java

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com.cmt.statemachine.impl.StateHelper Maven / Gradle / Ivy

package com.cmt.statemachine.impl;

import com.cmt.statemachine.State;

import java.util.Map;

/**
 * StateHelper
 *
 * @author Frank Zhang
 * @date 2020-02-08 4:23 PM
 */
public class StateHelper {
    public static  State getState(Map> stateMap, S stateId){
        State state = stateMap.get(stateId);
        if (state == null) {
            state = new StateImpl<>(stateId);
            stateMap.put(stateId, state);
        }
        return state;
    }
}