TrimPush.java

/*
    BeepBeep, an event stream processor
    Copyright (C) 2008-2018 Sylvain Hallé

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published
    by the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package basic;

import ca.uqac.lif.cep.Connector;
import ca.uqac.lif.cep.Pushable;
import ca.uqac.lif.cep.io.Print;
import ca.uqac.lif.cep.tmf.Trim;

/**
 * Use the {@link ca.uqac.lif.cep.tmf.Trim Trim} processor to discard events
 * from the beginning of a stream.
 * The chain of processors in this example can be represented
 * graphically as:
 * <p>
 * <img src="./doc-files/basic/TrimPush.png" alt="Processor graph">
 * @see PipingBinary
 * @author Sylvain Hallé
 * @difficulty Easy
 */
public class TrimPush
{
    public static void main (String[] args)
    {
        /// Create an instance of the Trim processor. This processor is
        // instructed to discard the first 3 events it receives.
        Trim trim = new Trim(3);

        /* Connect the trim processor to a Print processor. */
        Print print = new Print();
        Connector.connect(trim, print);
        
        /* Let us now print what we receive by pushing events into trim. */
        Pushable p = trim.getPushableInput();
        for (int i = 0; i < 6; i++)
        {
            p.push(i);
        }
        ///
    }
}