ewe.io
Class Writer

java.lang.Object
  ewe.io.Writer

Direct Known Subclasses:

BufferedWriter, CharArrayWriter, PrintWriter, StringWriter, TextWriter

public abstract class Writer

extends Object

Abstract class for writing to character streams. The only methods that a subclass must implement are write(char[], int, int), flush(), and close().

Field Summary

protected Lock

lock The object used to synchronize operations on this stream.

Constructor Summary

protected	Writer()
protected	Writer(Lock lock) Create a new character-stream writer whose critical sections will synchronize on the given object.

Method Summary

abstract void	close() Close the stream, flushing it first.
abstract void	flush() Flush the stream.
Lock	getLock() Get the Lock object used to synchronize IO operations on this Reader.
void	write(char[] out) Write a complete array of characters.
abstract void	write(char[] src, int off, int len) Write a portion of an array of characters.
void	write(int c) Write a single character.
void	write(String str) Write a string.
void	write(String str, int off, int len) Write a portion of a string.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, toString

Field Detail

lock

protected Lock lock

The object used to synchronize operations on this stream.

Constructor Detail

Writer

protected Writer()

Writer

protected Writer(Lock lock)

Create a new character-stream writer whose critical sections will synchronize on the given object.

Method Detail

getLock

public Lock getLock()

Get the Lock object used to synchronize IO operations on this Reader.

write

public void write(int c)
           throws IOException

Write a single character. The character to be written is contained in the 16 low-order bits of the given integer value; the 16 high-order bits are ignored.

Throws:

IOException

write

public void write(char[] out)
           throws IOException

Write a complete array of characters.

Parameters:

out - Array of characters to be written

Throws:

IOException - If an I/O error occurs

write

public abstract void write(char[] src,
                           int off,
                           int len)
                    throws IOException

Write a portion of an array of characters.

Parameters:

src - Array of characters

off - Offset from which to start writing characters

len - Number of characters to write

Throws:

IOException - If an I/O error occurs

write

public void write(String str)
           throws IOException

Write a string.

Parameters:

str - String to be written

Throws:

IOException - If an I/O error occurs

write

public void write(String str,
                  int off,
                  int len)
           throws IOException

Write a portion of a string.

Parameters:

str - A String

off - Offset from which to start writing characters

len - Number of characters to write

Throws:

IOException - If an I/O error occurs

flush

public abstract void flush()
                    throws IOException

Flush the stream. If the stream has saved any characters from the various write() methods in a buffer, write them immediately to their intended destination. Then, if that destination is another character or byte stream, flush it. Thus one flush() invocation will flush all the buffers in a chain of Writers and OutputStreams.

Throws:

IOException - If an I/O error occurs

close

public abstract void close()
                    throws IOException

Close the stream, flushing it first. Once a stream has been closed, further write() or flush() invocations will cause an IOException to be thrown. Closing a previously-closed stream, however, has no effect.

Throws:

IOException - If an I/O error occurs