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) 1998 E.J. Friedman-Hill and the Sandia Corporation

Author:

Ernest J. Friedman-Hill

See Also:

Serialized Form

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() Does nothing.
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()

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.

Overrides:

read in class java.io.Reader

Returns:

The character or EOF (-1)

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.

Overrides:

read in class java.io.Reader

Returns:

The number of characters read.

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.

Overrides:

read in class java.io.Reader

Returns:

The number of characters read.

See Also:

java.io.Writer#read

close

public void close()

Does nothing.

Overrides:

close in class java.io.Reader

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.