package testDouble;

import java.util.HashMap;

public class Test {
	static HashMap<String, String> sMap = new HashMap<String, String>();
	public static void main(String[] args) {
		
		sMap.put("1", "23");
		sMap.put("2", "ad");
		sMap.put("3", "1.0");
		sMap.put("4", "false");
		int i = getUserInfoByKey("1", Integer.class, 1);
		String s = getUserInfoByKey("2", String.class, "null");
		float f = getUserInfoByKey("3", Float.class, -0.1f);
		boolean b = getUserInfoByKey("4", Boolean.class, true);
		System.out.println("i:"+i);
		System.out.println("s:"+s);
		System.out.println("f:"+f);
		System.out.println("b:"+b);
	}
	
	protected static <T> T getUserInfoByKey(String key, Class<T> clazz, T deffault) {
		T ret = null;
		String v = sMap.get(key);
		if (deffault instanceof Integer) {
			ret = (clazz.cast(Integer.parseInt(v)));
		} else if (deffault instanceof String) {
			ret = clazz.cast(v);
		} else if (deffault instanceof Double) {
			ret = clazz.cast(Double.parseDouble(v));
		} else if (deffault instanceof Float) {
			ret = clazz.cast(Float.parseFloat(v));
		} else if (deffault instanceof Long) {
			ret = clazz.cast(Long.parseLong(v));
		} else if (deffault instanceof Boolean) {
			ret = clazz.cast(Boolean.parseBoolean(v));
		}
		if (null != ret) {
			return ret;
		}
		return deffault;
	}
}