package DNA;

import java.text.SimpleDateFormat;

import java.util.Arrays;

import java.util.Date;

/**

* Byte Handle Helper

*

* @author 12146

* @since JDK1.8

*/

public class Helper {

public static String getbyteStr(byte[] bs) {

StringBuilder sb = new StringBuilder();

for(byte b: bs) {

sb.append(" ").append(Byte.toUnsignedInt(b));

}

return sb.substring(1);

}

public static byte[] reverse(byte[] v) {

byte[] result = new byte[v.length];

for (int i = 0; i < v.length; i++) {

result[i] = v[v.length - i - 1];

}

return result;

}

public static byte[] hexToBytes(String value) {

if (value == null || value.length() == 0) {

return new byte[0];

}

if (value.length() % 2 == 1) {

throw new IllegalArgumentException();

}

byte[] result = new byte[value.length() / 2];

for (int i = 0; i < result.length; i++) {

result[i] = (byte) Integer.parseInt(value.substring(i * 2, i * 2 + 2), 16);

}

return result;

}

public static String toHexString(byte[] value) {

StringBuilder sb = new StringBuilder();

for (byte b : value) {

int v = Byte.toUnsignedInt(b);

sb.append(Integer.toHexString(v >>> 4));

sb.append(Integer.toHexString(v & 0x0f));

}

return sb.toString();

}

public static String reverse(String value) {

return toHexString(reverse(hexToBytes(value)));

}

public static byte[] removePrevZero(byte[] bt) {

if(bt.length == 33 && bt[0] == 0) {

return Arrays.copyOfRange(bt, 1, 33);

}

return bt;

}

public static String now() {

return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS").format(new Date());

}

}