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Java Source Code / Java Documentation » Science » javolution 5.2 » javolution.io

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.io .Reader

javolution.io .UTF8ByteBufferReader

UTF8ByteBufferReader

final public class UTF8ByteBufferReader extends Reader implements Reusable(Code)

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

This reader can be used for efficient decoding of native byte buffers (e.g. MappedByteBuffer), high-performance messaging (no intermediate buffer), etc.

This reader supports surrogate char pairs (representing characters in the range [U+10000 .. U+10FFFF]). It can also be used to read characters unicodes (31 bits) directly (ref. UTF8ByteBufferReader.read() ).

Each invocation of one of the read() methods may cause one or more bytes to be read from the underlying byte buffer. The end of stream is reached when the byte buffer position and limit coincide.

author:
   Jean-Marie Dautelle
version:
   2.0, December 9, 2004
See Also:   UTF8ByteBufferWriter

Constructor Summary
public	UTF8ByteBufferReader() Default constructor.

Method Summary
public void	close() Closes and UTF8ByteBufferReader.reset resets this reader for reuse.
public int	read() Reads a single character.
public int	read(char cbuf, int off, int len) Reads characters into a portion of an array.
public void	read(Appendable dest) Reads characters into the specified appendable.
public boolean	ready() Indicates if this stream is ready to be read.
public void	reset()
public UTF8ByteBufferReader	setByteBuffer(ByteBuffer byteBuffer)
public UTF8ByteBufferReader	setInput(ByteBuffer byteBuffer) Sets the `ByteBuffer` to use for reading available bytes from current buffer position. Parameters: byteBuffer - the `ByteBuffer` source.

Constructor Detail

UTF8ByteBufferReader
public UTF8ByteBufferReader()(Code)
	Default constructor.

Method Detail

close
public void close() throws IOException(Code)
	Closes and UTF8ByteBufferReader.reset resets this reader for reuse. throws: IOException - if an I/O error occurs.

read
public int read() throws IOException(Code)
	Reads a single character. This method does not block, `-1` is returned if the buffer's limit has been reached. the 31-bits Unicode of the character read, or -1 if there is no more remaining bytes to be read. throws: IOException - if an I/O error occurs (e.g. incomplete character sequence being read).

read
public int read(char cbuf, int off, int len) throws IOException(Code)
	Reads characters into a portion of an array. This method does not block. Note: Characters between U+10000 and U+10FFFF are represented by surrogate pairs (two `char`). Parameters: cbuf - the destination buffer. Parameters: off - the offset at which to start storing characters. Parameters: len - the maximum number of characters to read the number of characters read, or -1 if there is no more byte remaining. throws: IOException - if an I/O error occurs.

read
public void read(Appendable dest) throws IOException(Code)
	Reads characters into the specified appendable. This method does not block. Note: Characters between U+10000 and U+10FFFF are represented by surrogate pairs (two `char`). Parameters: dest - the destination buffer. throws: IOException - if an I/O error occurs.

ready
public boolean ready() throws IOException(Code)
	Indicates if this stream is ready to be read. `true` if the byte buffer has remaining bytes to read; `false` otherwise. throws: IOException - if an I/O error occurs.

reset
public void reset()(Code)

setByteBuffer
public UTF8ByteBufferReader setByteBuffer(ByteBuffer byteBuffer)(Code)
	UTF8ByteBufferReader.setInput(ByteBuffer)

setInput
public UTF8ByteBufferReader setInput(ByteBuffer byteBuffer)(Code)
	Sets the `ByteBuffer` to use for reading available bytes from current buffer position. Parameters: byteBuffer - the `ByteBuffer` source. this UTF-8 reader. throws: IllegalStateException - if this reader is being reused and it has not been UTF8ByteBufferReader.close closed or UTF8ByteBufferReader.reset reset.

Fields inherited from java.io.Reader

protected Object lock(Code)(Java Doc)

Methods inherited from java.io.Reader

abstract public void close() throws IOException(Code)(Java Doc)
public void mark(int readAheadLimit) throws IOException(Code)(Java Doc)
public boolean markSupported()(Code)(Java Doc)
public int read(java.nio.CharBuffer target) throws IOException(Code)(Java Doc)
public int read() throws IOException(Code)(Java Doc)
public int read(char cbuf) throws IOException(Code)(Java Doc)
abstract public int read(char cbuf, int off, int len) throws IOException(Code)(Java Doc)
public boolean ready() throws IOException(Code)(Java Doc)
public void reset() throws IOException(Code)(Java Doc)
public long skip(long n) 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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