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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derbyTesting.functionTests.util.streams 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   org.apache.derbyTesting.functionTests.util.streams.ByteAlphabet

ByteAlphabet
public class ByteAlphabet (Code)
A looping alphabet, returning bytes in a specified encoding. The alphabet loops over a list of bytes representing characters. The alphabet-object is used by looping stream, which in turn is used for testing methods requiring streaming inputs. The following alphabets have been defined:
  • Modern latin, lowercase ; letters a - z (26)
  • Norwegian/Danish, lowercase ; letters a - z, plus three additional letters (29)
  • Tamil ; 46 Tamil letters from UNICODE U0B80
  • CJK subset ; 12 letter from UNICODE CJK U4E00




Method Summary
public  intbyteCount()
     Return the number of bytes in the alphabet.
public  intcharCount()
     Return the number of characters in the alphabet.
public static  ByteAlphabetcjkSubsetUTF16BE()
     Create an alphabet returning bytes representing a subset of the CJK alphabet in the UTF-16BE encoding.
public static  ByteAlphabetcjkSubsetUTF8()
     Create an alphabet returning bytes representing a subset of the CJK alphabet in the UTF-8 encoding.
public  StringgetEncoding()
     Return the encoding used to represent characters as bytes.
public  StringgetName()
     Return the name of the alphabet.
public static  ByteAlphabetmodernLatinLowercase()
     Create an alphabet returning bytes representing the lowercase letters a-z in the "US-ASCII" encoding.
public  bytenextByte()
     Return the next byte in the alphabet.
public  intnextByteToRead(int bytesRead)
     Compute the next byte to read after reading the specified number of bytes.
public static  ByteAlphabetnorwegianLowercase()
     Create an alphabet returning bytes representing the 29 lowercase letters in the Norwegian/Danish alphabet in the "ISO-8859-1" encoding.
public  voidreset()
     Reset the alphabet, the next byte returned is the first byte in the alphabet, which might not be a complete character.
public static  ByteAlphabettamilUTF16BE()
     Create an alphabet returning bytes representing a subset of the Tamil alphabet in the UTF-16BE encoding.
public static  ByteAlphabettamilUTF8()
     Create an alphabet returning bytes representing a subset of the Tamil alphabet in the UTF-8 encoding.



Method Detail
byteCount
public int byteCount()(Code)
Return the number of bytes in the alphabet. The number of bytes in the alphabet is noramlly different from the number of characters in the alphabet, but it depends on the characters in the alphabet and encoding used to represent them as bytes.



charCount
public int charCount()(Code)
Return the number of characters in the alphabet.



cjkSubsetUTF16BE
public static ByteAlphabet cjkSubsetUTF16BE()(Code)
Create an alphabet returning bytes representing a subset of the CJK alphabet in the UTF-16BE encoding.



cjkSubsetUTF8
public static ByteAlphabet cjkSubsetUTF8()(Code)
Create an alphabet returning bytes representing a subset of the CJK alphabet in the UTF-8 encoding.



getEncoding
public String getEncoding()(Code)
Return the encoding used to represent characters as bytes.



getName
public String getName()(Code)
Return the name of the alphabet.



modernLatinLowercase
public static ByteAlphabet modernLatinLowercase()(Code)
Create an alphabet returning bytes representing the lowercase letters a-z in the "US-ASCII" encoding.



nextByte
public byte nextByte()(Code)
Return the next byte in the alphabet.



nextByteToRead
public int nextByteToRead(int bytesRead)(Code)
Compute the next byte to read after reading the specified number of bytes. Besides from returning the index, the internal state of the alphabet is updated.
Parameters:
  bytesRead - the number of bytes read the index of the next byte



norwegianLowercase
public static ByteAlphabet norwegianLowercase()(Code)
Create an alphabet returning bytes representing the 29 lowercase letters in the Norwegian/Danish alphabet in the "ISO-8859-1" encoding.



reset
public void reset()(Code)
Reset the alphabet, the next byte returned is the first byte in the alphabet, which might not be a complete character.



tamilUTF16BE
public static ByteAlphabet tamilUTF16BE()(Code)
Create an alphabet returning bytes representing a subset of the Tamil alphabet in the UTF-16BE encoding.



tamilUTF8
public static ByteAlphabet tamilUTF8()(Code)
Create an alphabet returning bytes representing a subset of the Tamil alphabet in the UTF-8 encoding.



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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