net.lshift.diffa.config.YearlyPeriodUnit.java Source code

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Here is the source code for net.lshift.diffa.config.YearlyPeriodUnit.java

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/**
 * Copyright (C) 2010-2012 LShift Ltd.
 *
 * Licensed 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 net.lshift.diffa.config;

import org.joda.time.DateTime;
import org.joda.time.Interval;

public class YearlyPeriodUnit extends PeriodUnit {
    YearlyPeriodUnit() {
        super("yearly");
    }

    @Override
    public boolean isCovering(Interval interval) {
        return interval != null
                && floor(interval.getEnd()).minusYears(1).compareTo(ceiling(interval.getStart())) >= 0;
    }

    @Override
    protected DateTime floor(DateTime instant) {
        return instant.year().roundFloorCopy();
    }

    @Override
    protected DateTime ceiling(DateTime instant) {
        return instant.year().roundCeilingCopy();
    }

    @Override
    protected DateTime subtractOneUnit(DateTime from) {
        return from.minusYears(1);
    }
}