info.gehrels.voting.web.applicationState.CastBallotsState.java Source code

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Here is the source code for info.gehrels.voting.web.applicationState.CastBallotsState.java

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/*
 * Copyright  2014 Benjamin Gehrels
 *
 * This file is part of The Single Transferable Vote Elections Web Interface.
 *
 * The Single Transferable Vote Elections Web Interface is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * The Single Transferable Vote Elections Web Interface 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
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with The Single Transferable Vote
 * Elections Web Interface. If not, see <http://www.gnu.org/licenses/>.
 */
package info.gehrels.voting.web.applicationState;

import com.google.common.base.Predicate;
import com.google.common.collect.ImmutableCollection;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import info.gehrels.voting.Ballot;
import info.gehrels.voting.genderedElections.GenderedCandidate;
import info.gehrels.voting.web.BallotInputTry;

import java.util.ArrayList;
import java.util.Collection;

public final class CastBallotsState {
    private final Collection<Ballot<GenderedCandidate>> firstTryCastBallots = new ArrayList<>();
    private final Collection<Ballot<GenderedCandidate>> secondTryCastBallots = new ArrayList<>();

    public synchronized void deleteById(long ballotId) {
        Iterables.removeIf(firstTryCastBallots, hasId(ballotId));
        Iterables.removeIf(secondTryCastBallots, hasId(ballotId));
    }

    public synchronized void add(BallotInputTry firstOrSecondTry, Ballot<GenderedCandidate> ballotFromForm) {
        getCastBallotsState(firstOrSecondTry).add(ballotFromForm);
    }

    public synchronized ImmutableCollection<Ballot<GenderedCandidate>> getFirstTryCastBallots() {
        return ImmutableList.copyOf(firstTryCastBallots);
    }

    public synchronized ImmutableCollection<Ballot<GenderedCandidate>> getSecondTryCastBallots() {
        return ImmutableList.copyOf(secondTryCastBallots);
    }

    private BallotIdPredicate hasId(long ballotId) {
        return new BallotIdPredicate(ballotId);
    }

    private Collection<Ballot<GenderedCandidate>> getCastBallotsState(BallotInputTry firstOrSecondTry) {
        if (firstOrSecondTry == BallotInputTry.FIRST) {
            return firstTryCastBallots;
        } else if (firstOrSecondTry == BallotInputTry.SECOND) {
            return secondTryCastBallots;
        } else {
            throw new IllegalStateException("Unknown enum value " + firstOrSecondTry);
        }
    }

    public synchronized void reset() {
        firstTryCastBallots.clear();
        secondTryCastBallots.clear();
    }

    private static final class BallotIdPredicate implements Predicate<Ballot<GenderedCandidate>> {
        private final long ballotId;

        private BallotIdPredicate(long ballotId) {
            this.ballotId = ballotId;
        }

        @Override
        public boolean apply(Ballot<GenderedCandidate> input) {
            return ballotId == input.id;
        }
    }
}