How to use

getFletcher32

method

in

org.h2.mvstore.DataUtils

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder(112);
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append('\n');
  bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder(FOOTER_LENGTH);
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append('\n');
  return buff.toString().getBytes(StandardCharsets.ISO_8859_1);
}

parseMapValue(buff, s, i + 1, size);
int check = (int) Long.parseLong(buff.toString(), 16);
if (check == getFletcher32(bytes, start, startKey - 1)) {
  return map;

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder();
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < Chunk.FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append("\n");
  return buff.toString().getBytes(DataUtils.LATIN);
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder();
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < Chunk.FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append("\n");
  return buff.toString().getBytes(DataUtils.LATIN);
}

byte[] getFooterBytes() {
  StringBuilder buff = new StringBuilder(FOOTER_LENGTH);
  DataUtils.appendMap(buff, "chunk", id);
  DataUtils.appendMap(buff, "block", block);
  DataUtils.appendMap(buff, "version", version);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  while (buff.length() < FOOTER_LENGTH - 1) {
    buff.append(' ');
  }
  buff.append('\n');
  return buff.toString().getBytes(StandardCharsets.ISO_8859_1);
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder(112);
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  int checksum = DataUtils.getFletcher32(bytes, 0, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append('\n');
  bytes = buff.toString().getBytes(StandardCharsets.ISO_8859_1);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder();
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append("\n");
  bytes = buff.toString().getBytes(DataUtils.LATIN);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

private void writeStoreHeader() {
  StringBuilder buff = new StringBuilder();
  if (lastChunk != null) {
    storeHeader.put("block", lastChunk.block);
    storeHeader.put("chunk", lastChunk.id);
    storeHeader.put("version", lastChunk.version);
  }
  DataUtils.appendMap(buff, storeHeader);
  byte[] bytes = buff.toString().getBytes(DataUtils.LATIN);
  int checksum = DataUtils.getFletcher32(bytes, bytes.length);
  DataUtils.appendMap(buff, "fletcher", checksum);
  buff.append("\n");
  bytes = buff.toString().getBytes(DataUtils.LATIN);
  ByteBuffer header = ByteBuffer.allocate(2 * BLOCK_SIZE);
  header.put(bytes);
  header.position(BLOCK_SIZE);
  header.put(bytes);
  header.rewind();
  write(0, header);
}

parseMapValue(buff, s, i + 1, size);
int check = (int) Long.parseLong(buff.toString(), 16);
if (check == getFletcher32(bytes, start, startKey - 1)) {
  return map;

s = s.substring(0, s.lastIndexOf("fletcher") - 1);
byte[] bytes = s.getBytes(DataUtils.LATIN);
int checksum = DataUtils.getFletcher32(bytes, bytes.length);
if (check == checksum) {
  int chunk = DataUtils.readHexInt(m, "chunk", 0);

s = s.substring(0, s.lastIndexOf("fletcher") - 1);
byte[] bytes = s.getBytes(DataUtils.LATIN);
int checksum = DataUtils.getFletcher32(bytes, bytes.length);
if (check == checksum) {
  int chunk = DataUtils.readHexInt(m, "chunk", 0);

s = s.substring(0, s.lastIndexOf("fletcher") - 1);
byte[] bytes = s.getBytes(DataUtils.LATIN);
int checksum = DataUtils.getFletcher32(bytes,
    bytes.length);
if (check != checksum) {

s = s.substring(0, s.lastIndexOf("fletcher") - 1);
byte[] bytes = s.getBytes(DataUtils.LATIN);
int checksum = DataUtils.getFletcher32(bytes,
    bytes.length);
if (check != checksum) {