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package ex20;

import java.io.PrintWriter;
import java.io.IOException;
import java.io.File;
import oms3.annotations.*;
import static oms3.annotations.Role.*;

public class IterationControl {

    @Role(PARAMETER)
    @In public int count;

    @Role(PARAMETER + OUTPUT)
    @In public File output;

    // flag for controlling the iteration
    @Out public boolean done;

    // current iteration variable
    int i;
    PrintWriter w;

    @Execute
    public void execute() throws IOException {
        if (i==0) {
            output.getParentFile().mkdirs();
            w = new PrintWriter(output);
            i = count;
        }
        w.println(i);
        done = i-- > 1;
        System.out.println("Count " + i);
    }


    @Finalize
    public void done() throws IOException {
        if (w != null)
            w.close();
        System.out.println("Wrote output to " + output);
    }
}

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import static oms3.SimBuilder.instance as OMS3

OMS3.sim {
    // the iteration is controlled by the 'c' component's 'done' field.
    model(iter:"c.done") {

       parameter {
          // repeat the iteration 5 times
          'c.count'  5
          // output file, using the variable $oms_prj
          'c.output' "$oms_prj/output/ex16/Out.txt"
       }

       components {
          // c is the counter control component.
          'c' 'ex20.IterationControl'
       }
    }
}