dk.teachus.utils.PeriodComparator.java Source code

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Here is the source code for dk.teachus.utils.PeriodComparator.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package dk.teachus.utils;

import java.util.Comparator;

import org.joda.time.DateMidnight;
import org.joda.time.DateTime;
import org.joda.time.LocalTime;

import dk.teachus.backend.domain.Period;

public class PeriodComparator implements Comparator<Period> {

    public int compare(Period o1, Period o2) {
        int compare = 0;

        if (o1 != null && o2 != null) {
            if (o1.getStartTime() != null && o2.getStartTime() != null) {
                DateTime startTime1 = convertAndReset(o1.getStartTime());
                DateTime startTime2 = convertAndReset(o2.getStartTime());
                compare = startTime1.compareTo(startTime2);
            } else if (o1.getStartTime() != null) {
                compare = -1;
            } else if (o2.getStartTime() != null) {
                compare = 1;
            }
        } else if (o1 != null) {
            compare = -1;
        } else if (o2 != null) {
            compare = 1;
        }

        return compare;
    }

    private DateTime convertAndReset(LocalTime date) {
        DateMidnight now = new DateMidnight();
        DateTime dateTime = date.toDateTime(now);
        dateTime = dateTime.withSecondOfMinute(0);
        dateTime = dateTime.withMillisOfSecond(0);

        return dateTime;
    }

}