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Date: Mon, 24 Feb 97 14:25:55 -0500
Message-Id: <9702241925.AA02147@Princeton.EDU>
Received: from [206.229.41.51] by PACEVM.DAC.PACE.EDU (IBM VM SMTP V2R3)
   with TCP; Mon, 24 Feb 97 12:52:10 EST
From: "Joseph Bergin"  <berginf@pace.edu>
Reply-To: "Joseph Bergin"  <berginf@pace.edu>
To: appel@princeton.edu
Subject: Java compiler book and tools
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
X-Mailer: POPmail 2.3b7

I recently got copies of your Java and ML compiler books. They are very nice and
I will probably adopt them in future in my compiler courses. Regarding your 
tools, however. Some machines can't effectively use a command line for inputting
names of files and other things. Therefore I have developed the following class 
that can be used to put an interface on the tools such as JavaLex and CUP.  They
should work with any system, but are necessary on something like the Macintosh. 
They may be freely distributed, but keep my authorship please.  

---------cut here-------------

package AUX;

import java.awt.Frame;
import java.awt.FileDialog;

/**
* BlowPipe can be used to put an interface on programs that normally accept
* instructions
* from the command line.  Therefore it can be used to make standard unix tools 
* more friendly to Macintosh and Windows systems. <p>
* To use this, put calls to these functions into your main(String [] argv) 
* function at the beginning, 
* before you start to decode argv.  For example, to decode one argument, that is
* to be taken as the input file use: <p> <code> <pre>
*  public static void main ( String argv[] ) throws java.io.IOException
*   {	arg = new String[1];
*	arg[0] = AUX.BlowPipe.getOldFileName(null);
*	. . .
*	</pre> </code><p>
* as the beginning of your main function.
* 
* <p>
* Note that all functions in this class are static.  You cannot create an object
* of type BlowPipe.  It is just a code encapsulator.  <p>
* @version 1.0
* @author <a href= "http://csis.pace.edu/~bergin/">Joseph Bergin, Pace 
University .</a>
*/
public class BlowPipe
{	
/**
   * Return the fully qualified path and file reference for an input file.
   * @param parent The frame of your application object (or null).
   * @return file name string prepended with directory information.
*/
	public static String getOldFileName(Frame parent)
	{	FileDialog fd = new FileDialog(parent, "Old File Name", FileDialog.LOAD);
		fd.setDirectory(".");
		fd.show();
		System.out.println(fd.getDirectory() + fd.getFile());
		return fd.getDirectory()+ fd.getFile();
	}
/**
   * Return the fully qualified path and file reference for an output file.
   * @param parent The frame of your application object (or null).
   * @return file name string prepended with directory information.
*/
	public static String getNewFileName(Frame parent)
	{	FileDialog fd = new FileDialog(parent, "Old File Name", FileDialog.SAVE);
		fd.setDirectory(".");
		fd.show();
		System.out.println(fd.getDirectory() + fd.getFile());
		return fd.getDirectory()+ fd.getFile();
	}
/**
   * Return argument strings such as switches.
   * Not implemented at this time.  Returns null. 
*/
	public static String getArgString()
	{ return null; // not yet implemented
	}
private BlowPipe(){};
}
---------cut here-------------


Joseph Bergin, Professor
Pace University, Computer Science, One Pace Plaza, NY NY 10038
EMAIL berginf@pace.edu
HOMEPAGE http://csis.pace.edu/~bergin/