How to use

readVarLong

method

in

org.h2.mvstore.DataUtils

private static long readVarLong(ByteBuffer buff) {
  return DataUtils.readVarLong(buff);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TYPE_LONG:
    return DataUtils.readVarLong(buff);
  case TAG_LONG_NEGATIVE:
    return -DataUtils.readVarLong(buff);
  case TAG_LONG_FIXED:
    return buff.getLong();
  }
  return (long) (tag - TAG_LONG_0_7);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TAG_DOUBLE_0:
    return 0d;
  case TAG_DOUBLE_1:
    return 1d;
  case TAG_DOUBLE_FIXED:
    return buff.getDouble();
  }
  return Double.longBitsToDouble(Long.reverse(DataUtils
      .readVarLong(buff)));
}

@Override
public Object read(ByteBuffer buff) {
  long operationId = DataUtils.readVarLong(buff);
  Object value;
  if (buff.get() == 1) {
    value = valueType.read(buff);
  } else {
    value = null;
  }
  return new VersionedValue(operationId, value);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TAG_BIG_INTEGER_0:
    return BigInteger.ZERO;
  case TAG_BIG_INTEGER_1:
    return BigInteger.ONE;
  case TAG_BIG_INTEGER_SMALL:
    return BigInteger.valueOf(DataUtils.readVarLong(buff));
  }
  int len = DataUtils.readVarInt(buff);
  byte[] bytes = Utils.newBytes(len);
  buff.get(bytes);
  return new BigInteger(bytes);
}

@Override
public Object read(ByteBuffer buff) {
  int flags = DataUtils.readVarInt(buff);
  if (flags == -1) {
    long id = DataUtils.readVarLong(buff);
    return new SpatialKey(id);
  }
  float[] minMax = new float[dimensions * 2];
  for (int i = 0; i < dimensions; i++) {
    float min = buff.getFloat();
    float max;
    if ((flags & (1 << i)) != 0) {
      max = min;
    } else {
      max = buff.getFloat();
    }
    minMax[i + i] = min;
    minMax[i + i + 1] = max;
  }
  long id = DataUtils.readVarLong(buff);
  return new SpatialKey(id, minMax);
}

  DataUtils.readVarLong(idBuffer);
  break;
case 2:
  length += DataUtils.readVarLong(idBuffer);
  DataUtils.readVarLong(idBuffer);
  break;
default:

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TAG_BIG_DECIMAL_0:
    return BigDecimal.ZERO;
  case TAG_BIG_DECIMAL_1:
    return BigDecimal.ONE;
  case TAG_BIG_DECIMAL_SMALL:
    return BigDecimal.valueOf(DataUtils.readVarLong(buff));
  case TAG_BIG_DECIMAL_SMALL_SCALED:
    int scale = DataUtils.readVarInt(buff);
    return BigDecimal.valueOf(DataUtils.readVarLong(buff), scale);
  }
  int scale = DataUtils.readVarInt(buff);
  int len = DataUtils.readVarInt(buff);
  byte[] bytes = Utils.newBytes(len);
  buff.get(bytes);
  BigInteger b = new BigInteger(bytes);
  return new BigDecimal(b, scale);
}

  long k = DataUtils.readVarLong(idBuffer);
  map.remove(k);
  break;
case 2:
  DataUtils.readVarLong(idBuffer);
  long k2 = DataUtils.readVarLong(idBuffer);

block = DataUtils.readVarLong(idBuffer);
buff.append("block ").append(block).append(" len=").append(len);
break;
length += DataUtils.readVarLong(idBuffer);
block = DataUtils.readVarLong(idBuffer);
buff.append("indirect block ").append(block).append(" len=").append(len);
break;

  long k = DataUtils.readVarLong(idBuffer);
  maxKey = Math.max(maxKey, k);
  break;
case 2:
  DataUtils.readVarLong(idBuffer);
  long k2 = DataUtils.readVarLong(idBuffer);
  maxKey = k2;
  byte[] r = map.get(k2);

long key = DataUtils.readVarLong(idBuffer);
if (skip >= len) {
  skip -= len;
long len = DataUtils.readVarLong(idBuffer);
long key = DataUtils.readVarLong(idBuffer);
if (skip >= len) {
  skip -= len;

long s = DataUtils.readVarLong(chunk);
counts[i] = s;

long s = DataUtils.readVarLong(buff);
total += s;
children[i] = new PageReference(null, p[i], s);

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TYPE_LONG:
    return DataUtils.readVarLong(buff);
  case TAG_LONG_NEGATIVE:
    return -DataUtils.readVarLong(buff);
  case TAG_LONG_FIXED:
    return buff.getLong();
  }
  return (long) (tag - TAG_LONG_0_7);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TYPE_LONG:
    return DataUtils.readVarLong(buff);
  case TAG_LONG_NEGATIVE:
    return -DataUtils.readVarLong(buff);
  case TAG_LONG_FIXED:
    return buff.getLong();
  }
  return Long.valueOf(tag - TAG_LONG_0_7);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TYPE_LONG:
    return DataUtils.readVarLong(buff);
  case TAG_LONG_NEGATIVE:
    return -DataUtils.readVarLong(buff);
  case TAG_LONG_FIXED:
    return buff.getLong();
  }
  return Long.valueOf(tag - TAG_LONG_0_7);
}

@Override
public Object read(ByteBuffer buff, int tag) {
  switch (tag) {
  case TAG_DOUBLE_0:
    return 0d;
  case TAG_DOUBLE_1:
    return 1d;
  case TAG_DOUBLE_FIXED:
    return buff.getDouble();
  }
  return Double.longBitsToDouble(Long.reverse(DataUtils
      .readVarLong(buff)));
}

@Override
public Object read(ByteBuffer buff) {
  VersionedValue v = new VersionedValue();
  v.operationId = DataUtils.readVarLong(buff);
  if (buff.get() == 1) {
    v.value = valueType.read(buff);
  }
  return v;
}

@Override
public Object read(ByteBuffer buff) {
  VersionedValue v = new VersionedValue();
  v.operationId = DataUtils.readVarLong(buff);
  if (buff.get() == 1) {
    v.value = valueType.read(buff);
  }
  return v;
}