gshute.ioutil
Class InteractiveLineSource

java.lang.Object
  |
  +--gshute.ioutil.LineSource
        |
        +--gshute.ioutil.InteractiveLineSource

public class InteractiveLineSource

extends LineSource

An InteractiveLineSource dispenses LineScanners for lines read from the terminal.

Field Summary

protected java.lang.String	prompt prompt is the prompt used by this InteractiveLineSource.
protected static java.io.BufferedReader	terminal terminal is the BufferedReader used by all InteractiveLineSources as an input stream.

Fields inherited from class gshute.ioutil.LineSource

currentLine, dataReader, echoOn, echoPolicy, fileName, includedFrom, lineIsValid, lineNumber

Method Summary

LineScanner	current() src.current() returns the line at the current position of src.
protected void	initialize() strm.initialize() establishes the InteractiveLineSource starting conditions for strm.
protected void	validateCurrentLine() strm.validateCurrentLine() ensures that currentLine is the line at the current position in strm.

Methods inherited from class gshute.ioutil.LineSource

advance, getFileName, getIncludedFrom, getLineNumber, more, setEchoOff, setEchoOn, setIncludedFrom

Methods inherited from class java.lang.Object

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

Field Detail

prompt

protected java.lang.String prompt

prompt is the prompt used by this InteractiveLineSource.

terminal

protected static java.io.BufferedReader terminal

terminal is the BufferedReader used by all InteractiveLineSources as an input stream.

Method Detail

current

public LineScanner current()
                    throws java.io.IOException,
                           java.lang.IllegalArgumentException

src.current() returns the line at the current position of src.

Precondition: src.more() is true.

Overrides:

current in class LineSource

validateCurrentLine

protected void validateCurrentLine()
                            throws java.io.IOException

strm.validateCurrentLine() ensures that currentLine is the line at the current position in strm. The line at the end of file position is a null object. For an InteractiveLineSource, a prompt should be issued before the line is validated.

Overrides:

validateCurrentLine in class LineSource

initialize

protected void initialize()
                   throws java.io.IOException,
                          java.io.FileNotFoundException

strm.initialize() establishes the InteractiveLineSource starting conditions for strm.

Overrides:

initialize in class LineSource