| java.lang.Object
 java.io.Reader
org.apache.xerces.impl.io.UCSReader
| UCSReader | | public class UCSReader extends Reader (Code) | | Reader for UCS-2 and UCS-4 encodings.
(i.e., encodings from ISO-10646-UCS-(2|4)).
author:
Neil Graham, IBM
version:
$Id: UCSReader.java 449317 2006-09-23 22:12:30Z mrglavas $ |
| Field Summary | |
| final public static int | DEFAULT_BUFFER_SIZE
Default byte buffer size (8192, larger than that of ASCIIReader
since it's reasonable to surmise that the average UCS-4-encoded
file should be 4 times as large as the average ASCII-encoded file). | | final public static short | UCS2BE
| | final public static short | UCS2LE
| | final public static short | UCS4BE
| | final public static short | UCS4LE
| | final protected byte[] | fBuffer
Byte buffer. | | final protected short | fEncoding
| | final protected InputStream | fInputStream
Input stream. |
| Constructor Summary | |
| public | UCSReader(InputStream inputStream, short encoding)
Constructs a UCS reader from the specified input stream
using the default buffer size. | | public | UCSReader(InputStream inputStream, int size, short encoding)
Constructs a UCS reader from the specified input stream
and buffer size. | | public | UCSReader(InputStream inputStream, byte[] buffer, short encoding)
Constructs a UCS reader from the specified input stream
and buffer. |
| Method Summary | |
| public void | close()
Close the stream. | | public void | mark(int readAheadLimit)
Mark the present position in the stream. | | public boolean | markSupported()
Tell whether this stream supports the mark() operation. | | public int | read()
Read a single character. | | public int | read(char ch, int offset, int length)
Read characters into a portion of an array. | | public boolean | ready()
Tell whether this stream is ready to be read.
True if the next read() is guaranteed not to block for input,false otherwise. | | public void | reset()
Reset the stream. | | public long | skip(long n)
Skip characters. |
| DEFAULT_BUFFER_SIZE | | final public static int DEFAULT_BUFFER_SIZE(Code) | | Default byte buffer size (8192, larger than that of ASCIIReader
since it's reasonable to surmise that the average UCS-4-encoded
file should be 4 times as large as the average ASCII-encoded file).
|
| UCS2BE | | final public static short UCS2BE(Code) | | |
| UCS2LE | | final public static short UCS2LE(Code) | | |
| UCS4BE | | final public static short UCS4BE(Code) | | |
| UCS4LE | | final public static short UCS4LE(Code) | | |
| fBuffer | | final protected byte[] fBuffer(Code) | | Byte buffer.
|
| fEncoding | | final protected short fEncoding(Code) | | |
| UCSReader | | public UCSReader(InputStream inputStream, short encoding)(Code) | | Constructs a UCS reader from the specified input stream
using the default buffer size. The Endian-ness and whether this is
UCS-2 or UCS-4 needs also to be known in advance.
Parameters:
inputStream - The input stream.
Parameters:
encoding - One of UCS2LE, UCS2BE, UCS4LE or UCS4BE. |
| UCSReader | | public UCSReader(InputStream inputStream, int size, short encoding)(Code) | | Constructs a UCS reader from the specified input stream
and buffer size. The Endian-ness and whether this is
UCS-2 or UCS-4 needs also to be known in advance.
Parameters:
inputStream - The input stream.
Parameters:
size - The initial buffer size.
Parameters:
encoding - One of UCS2LE, UCS2BE, UCS4LE or UCS4BE. |
| UCSReader | | public UCSReader(InputStream inputStream, byte[] buffer, short encoding)(Code) | | Constructs a UCS reader from the specified input stream
and buffer. The Endian-ness and whether this is
UCS-2 or UCS-4 needs also to be known in advance.
Parameters:
inputStream - The input stream.
Parameters:
buffer - The byte buffer.
Parameters:
encoding - One of UCS2LE, UCS2BE, UCS4LE or UCS4BE. |
| close | | public void close() throws IOException(Code) | | 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 |
| mark | | public void mark(int readAheadLimit) throws IOException(Code) | | 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 beread while still preserving the mark. Afterreading this many characters, attempting toreset the stream may fail.
exception:
IOException - If the stream does not support mark(),or if some other I/O error occurs |
| markSupported | | public boolean markSupported()(Code) | | Tell whether this stream supports the mark() operation.
|
| read | | public int read() throws IOException(Code) | | 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.
The character read, as an integer in the range 0 to 127(0x00-0x7f), or -1 if the end of the stream hasbeen reached
exception:
IOException - If an I/O error occurs |
| read | | public int read(char ch, int offset, int length) throws IOException(Code) | | 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
Parameters:
offset - Offset at which to start storing characters
Parameters:
length - Maximum number of characters to read The number of characters read, or -1 if the end of thestream has been reached
exception:
IOException - If an I/O error occurs |
| ready | | public boolean ready() throws IOException(Code) | | Tell whether this stream is ready to be read.
True if the next read() is guaranteed not to block for input,false otherwise. Note that returning false does not guarantee that thenext read will block.
exception:
IOException - If an I/O error occurs |
| reset | | public void reset() throws IOException(Code) | | 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 |
| skip | | public long skip(long n) throws IOException(Code) | | 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 The number of characters actually skipped
exception:
IOException - If an I/O error occurs |
|
|