gnu.mapping
Class TtyInPort

java.lang.Object
  java.io.Reader
      gnu.text.LineBufferedReader
          gnu.mapping.InPort
              gnu.mapping.TtyInPort

All Implemented Interfaces:

Printable, java.io.Closeable, java.lang.Readable

public class TtyInPort
extends InPort

An interactive input-port. Supports prompting, auto-flush of tied output port, transcripts.

Field Summary

protected boolean	promptEmitted
protected Procedure	prompter
protected OutPort	tie

Fields inherited from class gnu.mapping.InPort

inLocation

Fields inherited from class gnu.text.LineBufferedReader

buffer, BUFFER_SIZE, in, limit, lineNumber, markPos, pos, readAheadLimit, readState

Fields inherited from class java.io.Reader

lock

Constructor Summary

TtyInPort(java.io.InputStream in, Path name, OutPort tie)

TtyInPort(java.io.Reader in, Path name, OutPort tie)

Method Summary

int	fill(int len) Called by read() when it needs its buffer filled.
Procedure	getPrompter() Get the current prompter function.
void	lineStart(boolean revisited) A hook to allow sub-classes to perform some action at start of line.
int	read()
int	read(char[] cbuf, int off, int len)
void	setPrompter(Procedure prompter) Set the prompter function.

Methods inherited from class gnu.mapping.InPort

convertToReader, inDefault, openFile, openFile, print, setInDefault

Methods inherited from class gnu.text.LineBufferedReader

close, getColumnNumber, getConvertCR, getLineNumber, getName, getPath, getReadState, incrLineNumber, mark, markSupported, peek, readLine, readLine, ready, reset, setBuffer, setConvertCR, setKeepFullLines, setLineNumber, setName, setPath, skip_quick, skip, skip, skipRestOfLine, unread_quick, unread

Methods inherited from class java.io.Reader

read, read, skip

Methods inherited from class java.lang.Object

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

Field Detail

tie

protected OutPort tie

prompter

protected Procedure prompter

promptEmitted

protected boolean promptEmitted

Constructor Detail

TtyInPort

public TtyInPort(java.io.InputStream in,
                 Path name,
                 OutPort tie)

TtyInPort

public TtyInPort(java.io.Reader in,
                 Path name,
                 OutPort tie)

Method Detail

getPrompter

public Procedure getPrompter()

Get the current prompter function.

setPrompter

public void setPrompter(Procedure prompter)

Set the prompter function. The argument is called when a new line is read. It is passed one argument (this input port), and should return a string. That string is printed as the prompt string.

fill

public int fill(int len)
         throws java.io.IOException

Description copied from class: LineBufferedReader

Called by read() when it needs its buffer filled. Read characters into buffer, starting at off, for len. Can assume that len > 0. Only called if pos>=limit. Return -1 if EOF, otherwise number of read chars. This can be usefully overridden by sub-classes.

Overrides:

fill in class LineBufferedReader

Throws:

java.io.IOException

lineStart

public void lineStart(boolean revisited)
               throws java.io.IOException

Description copied from class: LineBufferedReader

A hook to allow sub-classes to perform some action at start of line. Called just before the first character of the new line is read.

Overrides:

lineStart in class LineBufferedReader

Parameters:

revisited - true if we have read here before (i.e. we did a reset of unread() to get here)

Throws:

java.io.IOException

read

public int read()
         throws java.io.IOException

Overrides:

read in class LineBufferedReader

Throws:

java.io.IOException

read

public int read(char[] cbuf,
                int off,
                int len)
         throws java.io.IOException

Overrides:

read in class LineBufferedReader

Throws:

java.io.IOException