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package io.polaris.core.codec;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
/**
* @author Qt
* @since 1.8
*/
public class HexCodec {
private static final HexEncoder encoder = new HexEncoder();
public static String encodeToString(byte[] data) {
return encodeToString(data, 0, data.length);
}
public static String encodeToString(byte[] data, int off, int length) {
byte[] encoded = encode(data, off, length);
return CodecStrings.fromByteArray(encoded);
}
/**
* encode the input data producing a HexCodec encoded byte array.
*
* @return a byte array containing the HexCodec encoded data.
*/
public static byte[] encode(byte[] data) {
return encode(data, 0, data.length);
}
/**
* encode the input data producing a HexCodec encoded byte array.
*
* @return a byte array containing the HexCodec encoded data.
*/
public static byte[] encode(byte[] data, int off, int length) {
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try {
encoder.encode(data, off, length, bOut);
} catch (Exception e) {
throw new CodecException("exception encoding HexCodec string: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* HexCodec encode the byte data writing it to the given output stream.
*
* @return the number of bytes produced.
*/
public static int encode(byte[] data, OutputStream out) throws IOException {
return encoder.encode(data, 0, data.length, out);
}
/**
* HexCodec encode the byte data writing it to the given output stream.
*
* @return the number of bytes produced.
*/
public static int encode(byte[] data, int off, int length, OutputStream out)
throws IOException {
return encoder.encode(data, off, length, out);
}
/**
* decode the HexCodec encoded input data. It is assumed the input data is valid.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decode(byte[] data) {
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try {
encoder.decode(data, 0, data.length, bOut);
} catch (Exception e) {
throw new CodecException("exception decoding HexCodec data: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* decode the HexCodec encoded String data - whitespace will be ignored.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decode(String data) {
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
try {
encoder.decode(data, bOut);
} catch (Exception e) {
throw new CodecException("exception decoding HexCodec string: " + e.getMessage(), e);
}
return bOut.toByteArray();
}
/**
* decode the HexCodec encoded String data writing it to the given output stream,
* whitespace characters will be ignored.
*
* @return the number of bytes produced.
*/
public static int decode(String data, OutputStream out)
throws IOException {
return encoder.decode(data, out);
}
/**
* Decode the hexadecimal-encoded string strictly i.e. any non-hexadecimal characters will be
* considered an error.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decodeStrict(String str) {
try {
return encoder.decodeStrict(str, 0, str.length());
} catch (Exception e) {
throw new CodecException("exception decoding HexCodec string: " + e.getMessage(), e);
}
}
/**
* Decode the hexadecimal-encoded string strictly i.e. any non-hexadecimal characters will be
* considered an error.
*
* @return a byte array representing the decoded data.
*/
public static byte[] decodeStrict(String str, int off, int len) {
try {
return encoder.decodeStrict(str, off, len);
} catch (Exception e) {
throw new CodecException("exception decoding HexCodec string: " + e.getMessage(), e);
}
}
}
