package nl.tudelft.simulation.dsol.interpreter;

import java.io.Serializable;

import nl.tudelft.simulation.dsol.interpreter.process.InterpretableProcess;

/**
 * A Test class.
 */
public class Test
{
    /**
     * executes the test.
     * @param args the command line arguments
     */
    public static void main(final String[] args)
    {
        // You can play with the log level to see the interpretation take place.
        new Test().doIt();
    }

    /** process to test. */
    private void doIt()
    {
        // Now we create a process and resume its operation.
        InterpretableProcess process = new MyProcess();
        process.resumeProcess();
    }

    /**
     * counts the links.
     * @param link the link
     * @return the number of links
     */
    public static int countLinks(final Link link)
    {
        if (link == null)
        {
            return 0;
        }
        return 1 + countLinks(link.next);
    }

    /**
     * A link class.
     */
    private class Link
    {
        /** the next in the chain. */
        public Link next;

        /**
         * constructs a new Link.
         * @param next the next
         */
        Link(final Link next)
        {
            this.next = next;
        }
    }

    /**
     * the Process.
     */
    private class MyProcess extends InterpretableProcess
    {
        /** */
        private static final long serialVersionUID = 1L;

        /**
         * constructs a Process.
         */
        MyProcess()
        {
            super();
        }

        /**
         * the process method.
         */
        public void process()
        {
            System.out.println("This process is started");
            Link link = new Link(new Link(new Link(null)));
            int count = Test.countLinks(link);
            System.out.println("links=" + count);
            System.out.println("This process is finished");
        }

        /** {@inheritDoc} */
        @Override
        public Serializable getSourceId()
        {
            return "MyProcess";
        }
    }
}