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package bjc.dicelang.scl;
import java.util.Scanner;
import bjc.funcdata.FunctionalList;
import bjc.funcdata.ListEx;
/**
* Implement a SCL REPL
*
* @author Ben Culkin
*/
public class StreamControlConsole {
/*
* @TODO 10/08/17 :SCLArgs
*
* Do something useful with the CLI args.
*
*/
/**
* Main method
*
* @param args
* Unused CLI args.
*/
public static void main(String[] args) {
/*
* Initialize vars.
*
*/
StreamEngine sengine = new StreamEngine();
StreamControlEngine sclengine = new StreamControlEngine(sengine);
Scanner scn = new Scanner(System.in);
/* Get input from the user. */
System.out.print("Enter a SCL command string (blank to exit): ");
/* Process it. */
while(scn.hasNextLine()) {
String ln = scn.nextLine().trim();
if(ln.equals("")) {
/* Ignore empty lines. */
break;
}
/* Break the token into strings. */
ListEx<String> res = new FunctionalList<>();
String[] tokens = ln.split(" ");
/* Run the stream engine on the tokens. */
boolean succ = sengine.doStreams(tokens, res);
if(!succ) {
System.out.printf("\tERROR: Stream engine failed for line '%s'\n", ln);
continue;
}
if(sengine.debug)
System.out.printf("\tDEBUG: Streamed tokens: { %s }\n", res);
/* Run the command through SCL. */
succ = sclengine.runProgram(res.iterator());
if(!succ) {
System.out.printf("\tERROR: SCL engine failed for line '%s'\n", ln);
continue;
}
/* Prompt again. */
System.out.print("Command string executed succesfully.\n\n");
System.out.print("Enter a SCL command string (blank to exit): ");
}
scn.close();
}
}
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