java.lang.Object
java.io.Reader
org.apache.derby.impl.jdbc.UTF8Reader
- public final class UTF8Reader
- extends java.io.Reader
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
in
private java.io.InputStream in
utfLen
private final long utfLen
utfCount
private long utfCount
readerCharCount
private long readerCharCount
maxFieldSize
private long maxFieldSize
buffer
private char[] buffer
charactersInBuffer
private int charactersInBuffer
readPositionInBuffer
private int readPositionInBuffer
noMoreReads
private boolean noMoreReads
parent
private ConnectionChild parent
UTF8Reader
public UTF8Reader(java.io.InputStream in,
long maxFieldSize,
ConnectionChild parent,
java.lang.Object synchronization)
throws java.io.IOException
read
public int read()
throws java.io.IOException
- Description copied from class:
java.io.Reader
- Reads an char from the input stream and returns it
as an int in the range of 0-65535. This method also will return -1 if
the end of the stream has been reached.
This method will block until the char can be read.
read
public int read(char[] cbuf,
int off,
int len)
throws java.io.IOException
- Description copied from class:
java.io.Reader
- Read chars from a stream and stores them into a caller
supplied buffer. It starts storing the data at index
offset
into the buffer and attempts to read len chars. This method
can return before reading the number of chars requested. The actual
number of chars read is returned as an int. A -1 is returned to indicate
the end of the stream.
This method will block until some data can be read.
This method operates by calling the single char read() method
in a loop until the desired number of chars are read. The read loop
stops short if the end of the stream is encountered or if an IOException
is encountered on any read operation except the first. If the first
attempt to read a chars fails, the IOException is allowed to propagate
upward. And subsequent IOException is caught and treated identically
to an end of stream condition. Subclasses can (and should if possible)
override this method to provide a more efficient implementation.
skip
public long skip(long len)
throws java.io.IOException
- Description copied from class:
java.io.Reader
- Skips the specified number of chars in the stream. It
returns the actual number of chars skipped, which may be less than the
requested amount.
This method reads and discards chars into a 256 char array until the
specified number of chars were skipped or until either the end of stream
is reached or a read attempt returns a short count. Subclasses can
override this method to provide a more efficient implementation where
one exists.
close
public void close()
- Description copied from class:
java.io.Reader
- Closes the stream. Any futher attempts to read from the
stream may generate an
IOException.
readInto
public int readInto(java.lang.StringBuffer sb,
int len)
throws java.io.IOException
readAsciiInto
int readAsciiInto(byte[] abuf,
int off,
int len)
throws java.io.IOException
closeIn
private void closeIn()
utfFormatException
private java.io.IOException utfFormatException(java.lang.String s)
utfFormatException
private java.io.IOException utfFormatException()
fillBuffer
private boolean fillBuffer()
throws java.io.IOException
- Fill the buffer, return true if eof has been reached.
readUnsignedShort
private final int readUnsignedShort()
throws java.io.IOException
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