WebLogic Server 8.1 API Reference

weblogic.apache.xerces.impl.io
Class UTF8Reader

java.lang.Object
  |
  +--java.io.Reader
        |
        +--weblogic.apache.xerces.impl.io.UTF8Reader

public class UTF8Reader

extends java.io.Reader

Field Summary

static int	DEFAULT_BUFFER_SIZE Default byte buffer size (2048).
protected byte[]	fBuffer Byte buffer.
protected java.io.InputStream	fInputStream Input stream.
protected int	fOffset Offset into buffer.

Fields inherited from class java.io.Reader

lock

Constructor Summary

UTF8Reader(java.io.InputStream inputStream)
Constructs a UTF-8 reader from the specified input stream using the default buffer size.

UTF8Reader(java.io.InputStream inputStream, int size, MessageFormatter messageFormatter, java.util.Locale locale)
Constructs a UTF-8 reader from the specified input stream, buffer size and MessageFormatter.

UTF8Reader(java.io.InputStream inputStream, MessageFormatter messageFormatter, java.util.Locale locale)
Constructs a UTF-8 reader from the specified input stream using the default buffer size and the given MessageFormatter.

Method Summary

void	close() Close the stream.
void	mark(int readAheadLimit) Mark the present position in the stream.
boolean	markSupported() Tell whether this stream supports the mark() operation.
int	read() Read a single character.
int	read(char[] ch, int offset, int length) Read characters into a portion of an array.
boolean	ready() Tell whether this stream is ready to be read.
void	reset() Reset the stream.
long	skip(long n) Skip characters.

Methods inherited from class java.io.Reader

read

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_BUFFER_SIZE

public static final int DEFAULT_BUFFER_SIZE

Default byte buffer size (2048).

fInputStream

protected java.io.InputStream fInputStream

Input stream.

fBuffer

protected byte[] fBuffer

Byte buffer.

fOffset

protected int fOffset

Offset into buffer.

Constructor Detail

UTF8Reader

public UTF8Reader(java.io.InputStream inputStream)

Constructs a UTF-8 reader from the specified input stream using the default buffer size. Primarily for testing.

Parameters:

inputStream - The input stream.

UTF8Reader

public UTF8Reader(java.io.InputStream inputStream,
                  MessageFormatter messageFormatter,
                  java.util.Locale locale)

Constructs a UTF-8 reader from the specified input stream using the default buffer size and the given MessageFormatter.

Parameters:

inputStream - The input stream.

messageFormatter - given MessageFormatter

locale - Locale to use for messages

UTF8Reader

public UTF8Reader(java.io.InputStream inputStream,
                  int size,
                  MessageFormatter messageFormatter,
                  java.util.Locale locale)

Constructs a UTF-8 reader from the specified input stream, buffer size and MessageFormatter.

Parameters:

inputStream - The input stream.

size - The initial buffer size.

messageFormatter - the formatter for localizing/formatting errors.

locale - the Locale to use for messages

Method Detail

read

public int read()
         throws java.io.IOException

Read a single character. This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.

Subclasses that intend to support efficient single-character input should override this method.

Returns:

The character read, as an integer in the range 0 to 16383 (0x00-0xffff), or -1 if the end of the stream has been reached

Throws:

java.io.IOException - If an I/O error occurs

Overrides:

read in class java.io.Reader

read

public int read(char[] ch,
                int offset,
                int length)
         throws java.io.IOException

Read characters into a portion of an array. This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.

Parameters:

ch - Destination buffer

offset - Offset at which to start storing characters

length - Maximum number of characters to read

Returns:

The number of characters read, or -1 if the end of the stream has been reached

Throws:

java.io.IOException - If an I/O error occurs

Overrides:

read in class java.io.Reader

skip

public long skip(long n)
          throws java.io.IOException

Skip characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached.

Parameters:

n - The number of characters to skip

Returns:

The number of characters actually skipped

Throws:

java.io.IOException - If an I/O error occurs

Overrides:

skip in class java.io.Reader

ready

public boolean ready()
              throws java.io.IOException

Tell whether this stream is ready to be read.

Returns:

True if the next read() is guaranteed not to block for input, false otherwise. Note that returning false does not guarantee that the next read will block.

Throws:

java.io.IOException - If an I/O error occurs

Overrides:

ready in class java.io.Reader

markSupported

public boolean markSupported()

Tell whether this stream supports the mark() operation.

Overrides:

markSupported in class java.io.Reader

mark

public void mark(int readAheadLimit)
          throws java.io.IOException

Mark the present position in the stream. Subsequent calls to reset() will attempt to reposition the stream to this point. Not all character-input streams support the mark() operation.

Parameters:

readAheadLimit - Limit on the number of characters that may be read while still preserving the mark. After reading this many characters, attempting to reset the stream may fail.

Throws:

java.io.IOException - If the stream does not support mark(), or if some other I/O error occurs

Overrides:

mark in class java.io.Reader

reset

public void reset()
           throws java.io.IOException

Reset the stream. If the stream has been marked, then attempt to reposition it at the mark. If the stream has not been marked, then attempt to reset it in some way appropriate to the particular stream, for example by repositioning it to its starting point. Not all character-input streams support the reset() operation, and some support reset() without supporting mark().

Throws:

java.io.IOException - If the stream has not been marked, or if the mark has been invalidated, or if the stream does not support reset(), or if some other I/O error occurs

Overrides:

reset in class java.io.Reader

close

public void close()
           throws java.io.IOException

Close the stream. Once a stream has been closed, further read(), ready(), mark(), or reset() invocations will throw an IOException. Closing a previously-closed stream, however, has no effect.

Throws:

java.io.IOException - If an I/O error occurs

Overrides:

close in class java.io.Reader