jess.awt
Class TextReader

java.lang.Object
  java.io.Reader
      jess.awt.TextReader

All Implemented Interfaces:

java.io.Serializable

public class TextReader

extends java.io.Reader

implements java.io.Serializable

A very simple reader, something like StringBufferReader but you can add text to it. Useful for creating GUIs in which you want Jess to continually read input from a text widget.

(C) 2005 Sandia National Laboratories

See Also:

Serialized Form

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

TextReader(boolean dontWait)
Create a TextReader.

Method Summary

void	appendText(java.lang.String s) Add text to the internal buffer.
int	available() Find out if any input is waiting to be read.
void	clear() Remove all text from the internal buffer.
void	close() read() immediately returns EOF and subsequently throws IOException.
int	read() Read a character from the internal buffer.
int	read(char[] c) Read an array of characters from the internal buffer.
int	read(char[] c, int start, int count) Read part of an array of characters from the internal buffer.

Methods inherited from class java.io.Reader

mark, markSupported, ready, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

TextReader

public TextReader(boolean dontWait)

Create a TextReader.

Parameters:

dontWait - If true, read() will return EOF (-1) immediately when its internal buffer is empty. If false, read() will block until more input becomes available.

Method Detail

read

public int read()
         throws java.io.IOException

Read a character from the internal buffer. Depending on the value of the dontWait parameter passed to the constructor, this method may block if no input is available.

Returns:

The character or EOF (-1)

Throws:

java.io.IOException

read

public int read(char[] c)
         throws java.io.IOException

Read an array of characters from the internal buffer. Depending on the value of the dontWait parameter passed to the constructor, this method may block if no input is available.

Returns:

The number of characters read.

Throws:

java.io.IOException

read

public int read(char[] c,
                int start,
                int count)
         throws java.io.IOException

Read part of an array of characters from the internal buffer. Depending on the value of the dontWait parameter passed to the constructor, this method may block if no input is available.

Returns:

The number of characters read.

Throws:

java.io.IOException

close

public void close()

read() immediately returns EOF and subsequently throws IOException.

available

public int available()

Find out if any input is waiting to be read.

Returns:

True if internal buffer is not empty.

appendText

public void appendText(java.lang.String s)

Add text to the internal buffer. The text will become available for reading via read().

Parameters:

s - New text to add to the buffer

See Also:

read()

clear

public void clear()

Remove all text from the internal buffer.