using System.Collections.Generic;

public class TBlackBoard {

    class TBlackboardItem {

        private object m_Value;

        public void SetValue(object v) {
            m_Value = v;
        }

        public T GetValue<T>() {
            return (T)m_Value;
        }
    }

    private Dictionary<string, TBlackboardItem> m_ItemDict;

    public TBlackBoard() {
        m_ItemDict = new Dictionary<string, TBlackboardItem>();
    }

    ~TBlackBoard() {
        m_ItemDict.Clear();
        m_ItemDict = null;
    }

    public void SetValue(string key, object v) {
        TBlackboardItem item;
        if (m_ItemDict.ContainsKey(key) == false) {
            item = new TBlackboardItem();
            m_ItemDict.Add(key, item);
        }
        else {
            item = m_ItemDict[key];
        }
        item.SetValue(v);
    }

    public T GetValue<T>(string key, T defaultValue) {
        if (m_ItemDict.ContainsKey(key) == false) {
            return defaultValue;
        }
        return m_ItemDict[key].GetValue<T>();
    }
}