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Java Source Code / Java Documentation » Development » Javolution » javolution.io 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   java.io.Writer
      javolution.io.UTF8ByteBufferWriter

UTF8ByteBufferWriter
final public class UTF8ByteBufferWriter extends Writer implements Reusable(Code)

This class represents a UTF-8 j2me.nio.ByteBuffer writer.

This writer supports surrogate char pairs (representing characters in the range [U+10000 .. U+10FFFF]). It can also be used to write characters from their unicodes (31 bits) directly (ref. UTF8ByteBufferWriter.write(int) ).

Instances of this class can be reused for different output streams and can be part of a higher level component (e.g. serializer) in order to avoid dynamic buffer allocation when the destination output changes. Also wrapping using a java.io.BufferedWriter is unnescessary as instances of this class embed their own data buffers.

Note: This writer is unsynchronized and always produces well-formed UTF-8 sequences.


author:
   Jean-Marie Dautelle
version:
   2.0, December 9, 2004
See Also:   UTF8ByteBufferReader



Constructor Summary
public  UTF8ByteBufferWriter()
     Default constructor.

Method Summary
public  voidclose()
     Closes and UTF8ByteBufferWriter.reset resets this writer for reuse.
public  voidflush()
     Flushes the stream (this method has no effect, the data is always directly written to the ByteBuffer).
public  voidreset()
    
public  UTF8ByteBufferWritersetByteBuffer(ByteBuffer byteBuffer)
    
public  UTF8ByteBufferWritersetOutput(ByteBuffer byteBuffer)
     Sets the byte buffer to use for writing until this writer is closed.
Parameters:
  byteBuffer - the destination byte buffer.
public  voidwrite(char c)
     Writes a single character.
public  voidwrite(int code)
     Writes a character given its 31-bits Unicode.
public  voidwrite(char cbuf, int off, int len)
     Writes a portion of an array of characters.
public  voidwrite(String str, int off, int len)
     Writes a portion of a string.
public  voidwrite(CharSequence csq)
     Writes the specified character sequence.


Constructor Detail
UTF8ByteBufferWriter
public UTF8ByteBufferWriter()(Code)
Default constructor.




Method Detail
close
public void close() throws IOException(Code)
Closes and UTF8ByteBufferWriter.reset resets this writer for reuse.
throws:
  IOException - if an I/O error occurs



flush
public void flush() throws IOException(Code)
Flushes the stream (this method has no effect, the data is always directly written to the ByteBuffer).
throws:
  IOException - if an I/O error occurs.



reset
public void reset()(Code)



setByteBuffer
public UTF8ByteBufferWriter setByteBuffer(ByteBuffer byteBuffer)(Code)
UTF8ByteBufferWriter.setOutput(ByteBuffer)



setOutput
public UTF8ByteBufferWriter setOutput(ByteBuffer byteBuffer)(Code)
Sets the byte buffer to use for writing until this writer is closed.
Parameters:
  byteBuffer - the destination byte buffer. this UTF-8 writer.
throws:
  IllegalStateException - if this writer is being reused and it has not been UTF8ByteBufferWriter.close closed or UTF8ByteBufferWriter.reset reset.



write
public void write(char c) throws IOException(Code)
Writes a single character. This method supports 16-bits character surrogates.
Parameters:
  c - char the character to be written (possiblya surrogate).
throws:
  IOException - if an I/O error occurs.



write
public void write(int code) throws IOException(Code)
Writes a character given its 31-bits Unicode.
Parameters:
  code - the 31 bits Unicode of the character to be written.
throws:
  IOException - if an I/O error occurs.



write
public void write(char cbuf, int off, int len) throws IOException(Code)
Writes a portion of an array of characters.
Parameters:
  cbuf - the array of characters.
Parameters:
  off - the offset from which to start writing characters.
Parameters:
  len - the number of characters to write.
throws:
  IOException - if an I/O error occurs.



write
public void write(String str, int off, int len) throws IOException(Code)
Writes a portion of a string.
Parameters:
  str - a String.
Parameters:
  off - the offset from which to start writing characters.
Parameters:
  len - the number of characters to write.
throws:
  IOException - if an I/O error occurs



write
public void write(CharSequence csq) throws IOException(Code)
Writes the specified character sequence.
Parameters:
  csq - the character sequence.
throws:
  IOException - if an I/O error occurs



Fields inherited from java.io.Writer
protected Object lock(Code)(Java Doc)

Methods inherited from java.io.Writer
public Writer append(CharSequence csq) throws IOException(Code)(Java Doc)
public Writer append(CharSequence csq, int start, int end) throws IOException(Code)(Java Doc)
public Writer append(char c) throws IOException(Code)(Java Doc)
abstract public void close() throws IOException(Code)(Java Doc)
abstract public void flush() throws IOException(Code)(Java Doc)
public void write(int c) throws IOException(Code)(Java Doc)
public void write(char cbuf) throws IOException(Code)(Java Doc)
abstract public void write(char cbuf, int off, int len) throws IOException(Code)(Java Doc)
public void write(String str) throws IOException(Code)(Java Doc)
public void write(String str, int off, int len) throws IOException(Code)(Java Doc)

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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