package org.activityinfo.legacy.shared.impl.pivot.order;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public 
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import org.activityinfo.legacy.shared.reports.content.DimensionCategory;
import org.activityinfo.legacy.shared.reports.content.PivotTableData;

import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class DefinedCategoryComparator implements Comparator<PivotTableData.Axis> {
    private final Map<DimensionCategory, Integer> orderMap;

    public DefinedCategoryComparator(List<DimensionCategory> order) {
        orderMap = new HashMap<DimensionCategory, Integer>();

        for (int i = 0; i != order.size(); ++i) {
            orderMap.put(order.get(i), i);
        }

    }

    @Override
    public int compare(PivotTableData.Axis a1, PivotTableData.Axis a2) {
        Integer o1 = orderMap.get(a1.getCategory());
        Integer o2 = orderMap.get(a2.getCategory());

        if (o1 == null) {
            o1 = Integer.MAX_VALUE;
        }
        if (o2 == null) {
            o2 = Integer.MAX_VALUE;
        }

        return o1.compareTo(o2);
    }
}