Class Bits

java.lang.Object
org.h2.util.Bits
public final class Bits extends Object
Manipulations with bytes and arrays. This class can be overridden in multi-release JAR with more efficient implementation for a newer versions of Java.

  • Constructor Summary

    Constructors
    Modifier
    Constructor
    Description
    private
    Bits()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    static int
    compareNotNull(char[] data1, char[] data2)
    Compare the contents of two char arrays.
    static int
    compareNotNullSigned(byte[] data1, byte[] data2)
    Compare the contents of two byte arrays.
    static int
    compareNotNullUnsigned(byte[] data1, byte[] data2)
    Compare the contents of two byte arrays.
    static double
    readDouble(byte[] buff, int pos)
    Reads a double value from the byte array at the given position in big-endian order.
    static double
    readDoubleLE(byte[] buff, int pos)
    Reads a double value from the byte array at the given position in little-endian order.
    static int
    readInt(byte[] buff, int pos)
    Reads a int value from the byte array at the given position in big-endian order.
    static int
    readIntLE(byte[] buff, int pos)
    Reads a int value from the byte array at the given position in little-endian order.
    static long
    readLong(byte[] buff, int pos)
    Reads a long value from the byte array at the given position in big-endian order.
    static long
    readLongLE(byte[] buff, int pos)
    Reads a long value from the byte array at the given position in little-endian order.
    static byte[]
    uuidToBytes(long msb, long lsb)
    Converts UUID value to byte array in big-endian order.
    static byte[]
    uuidToBytes(UUID uuid)
    Converts UUID value to byte array in big-endian order.
    static void
    writeDouble(byte[] buff, int pos, double x)
    Writes a double value to the byte array at the given position in big-endian order.
    static void
    writeDoubleLE(byte[] buff, int pos, double x)
    Writes a double value to the byte array at the given position in little-endian order.
    static void
    writeInt(byte[] buff, int pos, int x)
    Writes a int value to the byte array at the given position in big-endian order.
    static void
    writeIntLE(byte[] buff, int pos, int x)
    Writes a int value to the byte array at the given position in little-endian order.
    static void
    writeLong(byte[] buff, int pos, long x)
    Writes a long value to the byte array at the given position in big-endian order.
    static void
    writeLongLE(byte[] buff, int pos, long x)
    Writes a long value to the byte array at the given position in little-endian order.

    Methods inherited from class Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • Bits

      private Bits()

  • Method Details

    • compareNotNull

      public static int compareNotNull(char[] data1, char[] data2)
      Compare the contents of two char arrays. If the content or length of the first array is smaller than the second array, -1 is returned. If the content or length of the second array is smaller than the first array, 1 is returned. If the contents and lengths are the same, 0 is returned.
      Parameters:
      data1 - the first char array (must not be null)
      data2 - the second char array (must not be null)
      Returns:
      the result of the comparison (-1, 1 or 0)

    • compareNotNullSigned

      public static int compareNotNullSigned(byte[] data1, byte[] data2)
      Compare the contents of two byte arrays. If the content or length of the first array is smaller than the second array, -1 is returned. If the content or length of the second array is smaller than the first array, 1 is returned. If the contents and lengths are the same, 0 is returned.

      This method interprets bytes as signed.

      Parameters:
      data1 - the first byte array (must not be null)
      data2 - the second byte array (must not be null)
      Returns:
      the result of the comparison (-1, 1 or 0)

    • compareNotNullUnsigned

      public static int compareNotNullUnsigned(byte[] data1, byte[] data2)
      Compare the contents of two byte arrays. If the content or length of the first array is smaller than the second array, -1 is returned. If the content or length of the second array is smaller than the first array, 1 is returned. If the contents and lengths are the same, 0 is returned.

      This method interprets bytes as unsigned.

      Parameters:
      data1 - the first byte array (must not be null)
      data2 - the second byte array (must not be null)
      Returns:
      the result of the comparison (-1, 1 or 0)

    • readInt

      public static int readInt(byte[] buff, int pos)
      Reads a int value from the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • readIntLE

      public static int readIntLE(byte[] buff, int pos)
      Reads a int value from the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • readLong

      public static long readLong(byte[] buff, int pos)
      Reads a long value from the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • readLongLE

      public static long readLongLE(byte[] buff, int pos)
      Reads a long value from the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • readDouble

      public static double readDouble(byte[] buff, int pos)
      Reads a double value from the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • readDoubleLE

      public static double readDoubleLE(byte[] buff, int pos)
      Reads a double value from the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      Returns:
      the value

    • uuidToBytes

      public static byte[] uuidToBytes(long msb, long lsb)
      Converts UUID value to byte array in big-endian order.
      Parameters:
      msb - most significant part of UUID
      lsb - least significant part of UUID
      Returns:
      byte array representation

    • uuidToBytes

      public static byte[] uuidToBytes(UUID uuid)
      Converts UUID value to byte array in big-endian order.
      Parameters:
      uuid - UUID value
      Returns:
      byte array representation

    • writeInt

      public static void writeInt(byte[] buff, int pos, int x)
      Writes a int value to the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write

    • writeIntLE

      public static void writeIntLE(byte[] buff, int pos, int x)
      Writes a int value to the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write

    • writeLong

      public static void writeLong(byte[] buff, int pos, long x)
      Writes a long value to the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write

    • writeLongLE

      public static void writeLongLE(byte[] buff, int pos, long x)
      Writes a long value to the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write

    • writeDouble

      public static void writeDouble(byte[] buff, int pos, double x)
      Writes a double value to the byte array at the given position in big-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write

    • writeDoubleLE

      public static void writeDoubleLE(byte[] buff, int pos, double x)
      Writes a double value to the byte array at the given position in little-endian order.
      Parameters:
      buff - the byte array
      pos - the position
      x - the value to write