net.sf.mmm.util.io.base
Class EncodingUtilImpl.UtfDetectionReader

java.lang.Object
  java.io.Reader
      net.sf.mmm.util.io.api.EncodingDetectionReader
          net.sf.mmm.util.io.base.EncodingUtilImpl.UtfDetectionReader

All Implemented Interfaces:

Closeable, Readable

Enclosing class:

EncodingUtilImpl

protected class EncodingUtilImpl.UtfDetectionReader
extends EncodingDetectionReader

See Also:

EncodingUtilImpl.createUtfDetectionReader(InputStream, String)

Field Summary

private int	asciiBytesAvailable The number of ASCII bytes available to read from inputStream.
private EncodingUtilImpl.AsciiProcessor	asciiProcessor The processor for ASCII-mode.
private static int	BUFFER_SIZE The used buffer size.
private ProcessableByteArrayBuffer	detectionBuffer The lookahead buffer used to detect encoding.
private EncodingUtilImpl.UtfDetectionProcessor	detectionProcessor The processor to detect encoding by lookahead.
private String	encoding
private boolean	eos true if end of stream is reached.
private BufferInputStream	inputStream The input-stream to read.
private Reader	reader The Reader to delegate to.
private static int	REQUIRED_LOOKAHEAD The required lookahead size.

Fields inherited from class java.io.Reader

lock

Constructor Summary

EncodingUtilImpl.UtfDetectionReader(InputStream inputStream, String nonUtfEncoding)
The constructor.

Method Summary

void	close()
String	getEncoding() This method gets the encoding if already detected.
int	read(char[] buffer, int offset, int length)

Methods inherited from class java.io.Reader

mark, markSupported, read, read, read, ready, reset, skip

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

REQUIRED_LOOKAHEAD

private static final int REQUIRED_LOOKAHEAD

The required lookahead size.

See Also:

Constant Field Values

BUFFER_SIZE

private static final int BUFFER_SIZE

The used buffer size.

See Also:

Constant Field Values

inputStream

private final BufferInputStream inputStream

The input-stream to read.

asciiProcessor

private final EncodingUtilImpl.AsciiProcessor asciiProcessor

The processor for ASCII-mode.

detectionProcessor

private final EncodingUtilImpl.UtfDetectionProcessor detectionProcessor

The processor to detect encoding by lookahead.

detectionBuffer

private final ProcessableByteArrayBuffer detectionBuffer

The lookahead buffer used to detect encoding.

encoding

private String encoding

See Also:

getEncoding()

reader

private Reader reader

The Reader to delegate to. Will be null until the first non ASCII-Character is detected.

asciiBytesAvailable

private int asciiBytesAvailable

The number of ASCII bytes available to read from inputStream.

eos

private boolean eos

true if end of stream is reached.

Constructor Detail

EncodingUtilImpl.UtfDetectionReader

public EncodingUtilImpl.UtfDetectionReader(InputStream inputStream,
                                           String nonUtfEncoding)

The constructor.

Parameters:

inputStream - is the InputStream to read.

nonUtfEncoding - is the encoding to use as fallback if non-ASCII characters are detected that are NOT encoded in UTF.

Method Detail

getEncoding

public String getEncoding()

This method gets the encoding if already detected. The detection may last until the end of this Reader has been reached.

Specified by:

getEncoding in class EncodingDetectionReader

Returns:

the encoding or null if NOT yet detected (then typically ASCII is assumed so far).

close

public void close()
           throws IOException

Specified by:

close in interface Closeable

Specified by:

close in class Reader

Throws:

IOException

read

public int read(char[] buffer,
                int offset,
                int length)
         throws IOException

Specified by:

read in class Reader

Throws:

IOException