Package org.apache.uima.util.impl

Class DataIO

java.lang.Object
org.apache.uima.util.impl.DataIO
public class DataIO extends Object
Methods for working with Data during I/O

  • Field Details

    • UTF8

      public static final Charset UTF8

  • Constructor Details

    • DataIO

      public DataIO()

  • Method Details

    • decodeUTF8

      public static String decodeUTF8(ByteBuffer in, int length)

    • writeUTFv

      public static void writeUTFv(String string, DataOutput out) throws IOException
      Similar to writeUTF, but ok for strings > 32K bytes long and better for strings < 127 string utf-8 length must be ≤ Integer.MAX_VALUE - 1
      Parameters:
      string - the string to write
      out - the output sink
      Throws:
      IOException - passthru

    • readUTFv

      public static String readUTFv(DataInput in) throws IOException
      Throws:
      IOException

    • lengthUTFv

      public static long lengthUTFv(String string) throws UnsupportedEncodingException
      Throws:
      UnsupportedEncodingException

    • writeShort

      public static void writeShort(DataOutput out, int v) throws IOException
      DataOutputStream writeShort with checking of argument
      Parameters:
      out - the output sink
      v - the value to write
      Throws:
      IOException - passthru

    • writeByte

      public static void writeByte(DataOutput out, int v) throws IOException
      DataOutputStream writeByte with checking of argument
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • writeUnsignedByte

      public static void writeUnsignedByte(DataOutput out, int v) throws IOException
      Write lower 8 bits
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • writeVPNnumber

      public static void writeVPNnumber(DataOutput out, int v) throws IOException
      write a positive or negative number, optimized for fewer bytes near 0 sign put in low order bit, rest of number converted to positive and shifted left 1 max negative written as - 0.
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • writeVPNnumber

      public static void writeVPNnumber(DataOutput out, long v) throws IOException
      Throws:
      IOException

    • lengthVPNnumber

      public static int lengthVPNnumber(int v)

    • lengthVPNnumber

      public static int lengthVPNnumber(long v)

    • writeVnumber

      public static void writeVnumber(DataOutput out, int v) throws IOException
      Write a positive number with the fewest bytes possible up to 127 written as a byte high order bit on means get another byte Note: value treated as unsigned 32 bit int
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • lengthVnumber

      public static int lengthVnumber(int v)

    • readVnumber

      public static int readVnumber(DataInput in) throws IOException
      Throws:
      IOException

    • writeVnumber

      public static void writeVnumber(DataOutput out, long v) throws IOException
      Write a positive long with the fewest bytes possible; up to 127 written as a byte, high order bit on means get another byte.
      Parameters:
      out - output sink
      v - the value to write is never negative
      Throws:
      IOException - passthru

    • lengthVnumber

      public static int lengthVnumber(long v)

    • readVlong

      public static long readVlong(DataInput in) throws IOException
      Throws:
      IOException

    • readRestOfVlong

      public static long readRestOfVlong(DataInput in, int firstByte) throws IOException
      Throws:
      IOException

    • writeByteArray

      public static void writeByteArray(DataOutput out, byte[] v) throws IOException
      Throws:
      IOException

    • readByteArray

      public static byte[] readByteArray(DataInput in) throws IOException
      Throws:
      IOException

    • writeIntArray

      public static void writeIntArray(DataOutput out, int[] v) throws IOException
      write array preceded by its length
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • readIntArray

      public static int[] readIntArray(DataInput in) throws IOException
      Throws:
      IOException

    • writeIntArrayDelta

      public static void writeIntArrayDelta(DataOutput out, int[] v) throws IOException
      Write delta encoded value, for increasing values
      Parameters:
      out - output sink
      v - the value to write
      Throws:
      IOException - passthru

    • readIntArrayDelta

      public static int[] readIntArrayDelta(DataInput in) throws IOException
      Throws:
      IOException

    • writeLongArray

      public static void writeLongArray(DataOutput out, long[] v) throws IOException
      Throws:
      IOException

    • readLongArray

      public static long[] readLongArray(DataInput in) throws IOException
      Throws:
      IOException

    • writeLongArrayDelta

      public static void writeLongArrayDelta(DataOutput out, long[] v) throws IOException
      Throws:
      IOException

    • readLongArrayDelta

      public static long[] readLongArrayDelta(DataInput in) throws IOException
      Throws:
      IOException

    • readUnsignedByte

      public static int readUnsignedByte(DataInput in) throws IOException
      Throws:
      IOException