/
ResetWindow.java
53 lines (47 loc) · 1.8 KB
/
ResetWindow.java
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/*
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.functions.Cumulate;
import ca.uqac.lif.cep.functions.CumulativeFunction;
import ca.uqac.lif.cep.io.Print;
import ca.uqac.lif.cep.tmf.Window;
import ca.uqac.lif.cep.util.Numbers;
/**
* Usage of a processor's {@link ca.uqac.lif.cep.Processor#reset() reset()}
* method.
* @author Sylvain Hallé
* @difficulty Easy
*/
public class ResetWindow
{
public static void main(String[] args)
{
/// We create a window processor that will compute a sum of numbers
// over a sliding window of width 3
Window w = new Window(new Cumulate(
new CumulativeFunction<Number>(Numbers.addition)), 3);
Connector.connect(w, new Print());
Pushable p = w.getPushableInput();
// Let us push some events and print them
p.push(3).push(1).push(4).push(1).push(6);
// We now reset the window and push new events. Notice how the
// first two calls on push do not print anything.
w.reset();
p.push(2).push(7).push(1).push(8).push(3);
///
}
}