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sql2java common class package

There is a newer version: 5.2.0

package gu.sql2java;

import java.util.BitSet;

/**
 * 字段可见度定义
 * @author guyadong
 * @since 3.32.0
 */
public enum ColumnVisibility {
	/** 默认:全可见 */DEFAULT(0b11),
	/** 只本地可见 */LOCAL(0b00),
	/** THRIFT RPC 传输时可见 */THRIFT(0b10),
	/**  JSON序列化/反序列化时可见 */JSON(0b01);
	private final BitSet bitSet;
	private ColumnVisibility(int bit) {
		this.bitSet = BitSet.valueOf(new byte[] {(byte)bit});
	}
	public boolean singleVisibility() {
		return bitSet.cardinality()==1;
	}
	/**
	 * 判断目标 {@code target} 枚举变量的可见范围是否匹配当前枚举变量要求的可见范围
	 * @param target
	 */
	public boolean match(ColumnVisibility target) {
		if(null == target) {
			return false;
		}
		for(int i = bitSet.length();(i = bitSet.previousSetBit(i-1)) >= 0;) {
			if(!target.bitSet.get(i)) {
				return false;
			}
		}
		return true;
	}
	/** 是否JSON序列化/反序列化时可见 */
	public boolean isJsonVisiable(){
		return bitSet.get(0);
	}
	/**  是否THRIFT RPC 传输时可见 */
	public boolean isThriftVisiable() {
		return bitSet.get(1);
	}
}