File	Doc	Category	Size	Date	Package
ASCIIReader.java	API Doc	Apache Xerces 3.0.1	9196	Fri Sep 14 20:33:56 BST 2007	org.apache.xerces.impl.io

ASCIIReader

• java.lang.Object
  • java.io.Reader

Fields Summary
public static final int	DEFAULT_BUFFER_SIZE Default byte buffer size (2048).
protected final InputStream	fInputStream Input stream.
protected final byte[]	fBuffer Byte buffer.
private final org.apache.xerces.util.MessageFormatter	fFormatter
private final Locale	fLocale

Constructors Summary
public ASCIIReader(InputStream inputStream, org.apache.xerces.util.MessageFormatter messageFormatter, Locale locale) Constructs an ASCII reader from the specified input stream using the default buffer size. param inputStream The input stream. param messageFormatter the MessageFormatter to use to message reporting. param locale the Locale for which messages are to be reported // // Constructors // this(inputStream, DEFAULT_BUFFER_SIZE, messageFormatter, locale);
public ASCIIReader(InputStream inputStream, int size, org.apache.xerces.util.MessageFormatter messageFormatter, Locale locale) Constructs an ASCII reader from the specified input stream and buffer size. param inputStream The input stream. param size The initial buffer size. param messageFormatter the MessageFormatter to use to message reporting. param locale the Locale for which messages are to be reported this(inputStream, new byte[size], messageFormatter, locale);
public ASCIIReader(InputStream inputStream, byte[] buffer, org.apache.xerces.util.MessageFormatter messageFormatter, Locale locale) Constructs an ASCII reader from the specified input stream and buffer. param inputStream The input stream. param buffer The byte buffer. param messageFormatter the MessageFormatter to use to message reporting. param locale the Locale for which messages are to be reported fInputStream = inputStream; fBuffer = buffer; fFormatter = messageFormatter; fLocale = locale;

Methods Summary
public void	close() 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. exception IOException If an I/O error occurs fInputStream.close();
public void	mark(int readAheadLimit) 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. param 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. exception IOException If the stream does not support mark(), or if some other I/O error occurs fInputStream.mark(readAheadLimit);
public boolean	markSupported() Tell whether this stream supports the mark() operation. return fInputStream.markSupported();
public int	read() 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. return The character read, as an integer in the range 0 to 127 (0x00-0x7f), or -1 if the end of the stream has been reached exception IOException If an I/O error occurs int b0 = fInputStream.read(); if (b0 >= 0x80) { throw new MalformedByteSequenceException(fFormatter, fLocale, XMLMessageFormatter.XML_DOMAIN, "InvalidASCII", new Object [] {Integer.toString(b0)}); } return b0;
public int	read(char[] ch, int offset, int length) 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. param ch Destination buffer param offset Offset at which to start storing characters param length Maximum number of characters to read return The number of characters read, or -1 if the end of the stream has been reached exception IOException If an I/O error occurs if (length > fBuffer.length) { length = fBuffer.length; } int count = fInputStream.read(fBuffer, 0, length); for (int i = 0; i < count; i++) { int b0 = fBuffer[i]; if (b0 < 0) { throw new MalformedByteSequenceException(fFormatter, fLocale, XMLMessageFormatter.XML_DOMAIN, "InvalidASCII", new Object [] {Integer.toString(b0 & 0x0FF)}); } ch[offset + i] = (char)b0; } return count;
public boolean	ready() Tell whether this stream is ready to be read. return 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. exception IOException If an I/O error occurs return false;
public void	reset() 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(). exception 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 fInputStream.reset();
public long	skip(long n) Skip characters. This method will block until some characters are available, an I/O error occurs, or the end of the stream is reached. param n The number of characters to skip return The number of characters actually skipped exception IOException If an I/O error occurs return fInputStream.skip(n);