/*
* JBoss, Home of Professional Open Source.
* Copyright 2010, Red Hat, Inc., and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.gwt.circuit.sample.calculator;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.Map;
import org.jboss.gwt.circuit.Action;
import org.jboss.gwt.circuit.Agreement;
import org.jboss.gwt.circuit.ChangeSupport;
import org.jboss.gwt.circuit.Dispatcher;
import org.jboss.gwt.circuit.StoreCallback;
public class CalculatorStore extends ChangeSupport {
private final Map<Term, Integer> results;
public CalculatorStore(final Dispatcher dispatcher) {
this.results = new LinkedHashMap<>();
dispatcher.register(CalculatorStore.class, new StoreCallback() {
@Override
public Agreement voteFor(final Action action) {
if (action instanceof TermAction) {
return new Agreement(true);
}
return Agreement.NONE;
}
@Override
public void complete(final Action action, final Dispatcher.Channel channel) {
Term term = (Term) action.getPayload();
results.put(term, calculate(term));
channel.ack();
}
@Override
public void signalChange(final Action action) { fireChange(action); }
});
}
private int calculate(final Term term) {
switch (term.getOp()) {
case PLUS:
return term.getLeft() + term.getRight();
case MINUS:
return term.getLeft() - term.getRight();
case MULTIPLY:
return term.getLeft() * term.getRight();
case DIVIDE:
return term.getLeft() / term.getRight();
}
return 0;
}
public Map<Term, Integer> getResults() {
return Collections.unmodifiableMap(results);
}
}