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org.apache.derby.impl.jdbc
Class ReaderToAscii  

java.lang.Object
  java.io.InputStream
      org.apache.derby.impl.jdbc.ReaderToAscii

All Implemented Interfaces:

java.io.Closeable

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public final class ReaderToAscii

extends java.io.InputStream

ReaderToAscii converts Reader (with characters) to a stream of ASCII characters.

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Field Summary
private  boolean	closed
private  char[]	conv
private  java.io.Reader	data

 

Constructor Summary

ReaderToAscii(java.io.Reader data)

 

Method Summary
void	close()           This method closes the stream.
int	read()           This method reads an unsigned byte from the input stream and returns it as an int in the range of 0-255.
int	read(byte[] buf, int off, int len)           This method read bytes from a stream and stores them into a caller supplied buffer.
long	skip(long len)           This method skips the specified number of bytes in the stream.

 

Methods inherited from class java.io.InputStream

available, mark, markSupported, read, reset

 

Methods inherited from class java.lang.Object

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

 

Field Detail

data

private final java.io.Reader data

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conv

private char[] conv

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closed

private boolean closed

Constructor Detail

ReaderToAscii

public ReaderToAscii(java.io.Reader data)

Method Detail

read

public int read()
         throws java.io.IOException

Description copied from class: java.io.InputStream

This method reads an unsigned byte from the input stream and returns it as an int in the range of 0-255. This method also will return -1 if the end of the stream has been reached.

This method will block until the byte can be read.

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read

public int read(byte[] buf,
                int off,
                int len)
         throws java.io.IOException

Description copied from class: java.io.InputStream

This method read bytes from a stream and stores them into a caller supplied buffer. It starts storing the data at index off into the buffer and attempts to read len bytes. This method can return before reading the number of bytes requested. The actual number of bytes 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 byte read() method in a loop until the desired number of bytes 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 bytes 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.

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skip

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

Description copied from class: java.io.InputStream

This method skips the specified number of bytes in the stream. It returns the actual number of bytes skipped, which may be less than the requested amount.

This method reads and discards bytes into a byte array until the specified number of bytes were skipped or until either the end of stream is reached or a read attempt returns a short count. Subclasses can override this metho to provide a more efficient implementation where one exists.

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close

public void close()
           throws java.io.IOException

Description copied from class: java.io.InputStream

This method closes the stream. Any futher attempts to read from the stream may generate an IOException

This method does nothing in this class, but subclasses may override this method in order to provide additional functionality.

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