UtfOps (Oracle - Berkeley DB Java API)
Date: 2010-08-27

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## com.sleepycat.util
Class UtfOps

    java.lang.Object
      com.sleepycat.util.UtfOps

    public class UtfOps

extends Object

UTF operations with more flexibility than is provided by DataInput and DataOutput.

Constructor Summary
`UtfOps()`

Method Summary
`static int` | `bytesToChars(byte[] bytes, int byteOffset, char[] chars, int charOffset, int len, boolean isByteLen)` Converts byte arrays into character arrays.
`static String` | `bytesToString(byte[] bytes, int offset, int length)` Converts byte arrays into strings.
`static void` | `charsToBytes(char[] chars, int charOffset, byte[] bytes, int byteOffset, int charLength)` Converts character arrays into byte arrays.
`static int` | `getByteLength(char[] chars)` Returns the byte length of the UTF string that would be created by converting the given characters to UTF.
`static int` | `getByteLength(char[] chars, int offset, int length)` Returns the byte length of the UTF string that would be created by converting the given characters to UTF.
`static int` | `getCharLength(byte[] bytes)` Returns the number of characters represented by the given UTF string.
`static int` | `getCharLength(byte[] bytes, int offset, int length)` Returns the number of characters represented by the given UTF string.
`static int` | `getZeroTerminatedByteLength(byte[] bytes, int offset)` Returns the byte length of a null terminated UTF string, not including the terminator.
`static byte[]` | `stringToBytes(String string)` Converts strings to byte arrays.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### UtfOps

    public UtfOps()

Method Detail

### getZeroTerminatedByteLength

    public static int getZeroTerminatedByteLength(byte[] bytes,
                                                  int offset)
                                           throws IndexOutOfBoundsException

  Returns the byte length of a null terminated UTF string, not including the terminator.

  Parameters:
    `bytes` - the data containing the UTF string.
    `offset` - the beginning of the string the measure.
  Returns:
    the number of bytes.
  Throws:
    `IndexOutOfBoundsException` - if no zero terminator is found.

### getByteLength

    public static int getByteLength(char[] chars)

  Returns the byte length of the UTF string that would be created by converting the given characters to UTF.

  Parameters:
    `chars` - the characters that would be converted.
  Returns:
    the byte length of the equivalent UTF data.

### getByteLength

    public static int getByteLength(char[] chars,
                                    int offset,
                                    int length)

  Returns the byte length of the UTF string that would be created by converting the given characters to UTF.

  Parameters:
    `chars` - the characters that would be converted.
    `offset` - the first character to be converted.
    `length` - the number of characters to be converted.
  Returns:
    the byte length of the equivalent UTF data.

### getCharLength

    public static int getCharLength(byte[] bytes)
                             throws IllegalArgumentException,
                                    IndexOutOfBoundsException

  Returns the number of characters represented by the given UTF string.

  Parameters:
    `bytes` - the UTF string.
  Returns:
    the number of characters.
  Throws:
    `IndexOutOfBoundsException` - if a UTF character sequence at the end of the data is not complete.
    `IllegalArgumentException` - if an illegal UTF sequence is encountered.

### getCharLength

    public static int getCharLength(byte[] bytes,
                                    int offset,
                                    int length)
                             throws IllegalArgumentException,
                                    IndexOutOfBoundsException

  Returns the number of characters represented by the given UTF string.

  Parameters:
    `bytes` - the data containing the UTF string.
    `offset` - the first byte to be converted.
    `length` - the number of byte to be converted.
  Throws:
    `IndexOutOfBoundsException` - if a UTF character sequence at the end of the data is not complete.
    `IllegalArgumentException` - if an illegal UTF sequence is encountered.

### bytesToChars

    public static int bytesToChars(byte[] bytes,
                                   int byteOffset,
                                   char[] chars,
                                   int charOffset,
                                   int len,
                                   boolean isByteLen)
                            throws IllegalArgumentException,
                                   IndexOutOfBoundsException

  Converts byte arrays into character arrays.

  Parameters:
    `bytes` - the source byte data to convert
    `byteOffset` - the offset into the byte array at which to start the conversion
    `chars` - the destination array
    `charOffset` - the offset into chars at which to begin the copy
    `len` - the amount of information to copy into chars
    `isByteLen` - if true then len is a measure of bytes, otherwise len is a measure of characters
  Throws:
    `IndexOutOfBoundsException` - if a UTF character sequence at the end of the data is not complete.
    `IllegalArgumentException` - if an illegal UTF sequence is encountered.

### charsToBytes

    public static void charsToBytes(char[] chars,
                                    int charOffset,
                                    byte[] bytes,
                                    int byteOffset,
                                    int charLength)

  Converts character arrays into byte arrays.

  Parameters:
    `chars` - the source character data to convert
    `charOffset` - the offset into the character array at which to start the conversion
    `bytes` - the destination array
    `byteOffset` - the offset into bytes at which to begin the copy
    `charLength` - the length of characters to copy into bytes

### bytesToString

    public static String bytesToString(byte[] bytes,
                                       int offset,
                                       int length)
                                throws IllegalArgumentException,
                                       IndexOutOfBoundsException

  Converts byte arrays into strings.

  Parameters:
    `bytes` - the source byte data to convert
    `offset` - the offset into the byte array at which to start the conversion
    `length` - the number of bytes to be converted.
  Returns:
    the string.
  Throws:
    `IndexOutOfBoundsException` - if a UTF character sequence at the end of the data is not complete.
    `IllegalArgumentException` - if an illegal UTF sequence is encountered.

### stringToBytes

    public static byte[] stringToBytes(String string)

  Converts strings to byte arrays.

  Parameters:
    `string` - the string to convert.
  Returns:
    the UTF byte array.

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