org.apache.drill.exec.util.TSI.java Source code

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Here is the source code for org.apache.drill.exec.util.TSI.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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 org.apache.drill.exec.util;

import com.google.common.collect.ImmutableList;
import org.joda.time.Days;
import org.joda.time.Hours;
import org.joda.time.Interval;
import org.joda.time.Minutes;
import org.joda.time.Months;
import org.joda.time.MutableDateTime;
import org.joda.time.Seconds;
import org.joda.time.Weeks;
import org.joda.time.Years;

import java.util.List;

public enum TSI {
    MICROSECOND(ImmutableList.<String>builder().add("FRAC_SECOND").add("MICROSECOND").add("SQL_TSI_FRAC_SECOND")
            .add("SQL_TSI_MICROSECOND").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addMillis(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return interval.getEndMillis() - interval.getStartMillis();
        }
    },
    SECOND(ImmutableList.<String>builder().add("SECOND").add("SQL_TSI_SECOND").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addSeconds(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Seconds.secondsIn(interval).getSeconds();
        }
    },
    MINUTE(ImmutableList.<String>builder().add("MINUTE").add("SQL_TSI_MINUTE").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addMinutes(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Minutes.minutesIn(interval).getMinutes();
        }
    },
    HOUR(ImmutableList.<String>builder().add("HOUR").add("SQL_TSI_HOUR").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addHours(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Hours.hoursIn(interval).getHours();
        }
    },
    DAY(ImmutableList.<String>builder().add("DAY").add("SQL_TSI_DAY").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addDays(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Days.daysIn(interval).getDays();
        }
    },
    WEEK(ImmutableList.<String>builder().add("WEEK").add("SQL_TSI_WEEK").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addWeeks(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Weeks.weeksIn(interval).getWeeks();
        }
    },
    MONTH(ImmutableList.<String>builder().add("MONTH").add("SQL_TSI_MONTH").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addMonths(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Months.monthsIn(interval).getMonths();
        }
    },
    QUARTER(ImmutableList.<String>builder().add("QUARTER").add("SQL_TSI_QUARTER").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addMonths(3 * count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Months.monthsIn(interval).getMonths() / 3;
        }
    },
    YEAR(ImmutableList.<String>builder().add("YEAR").add("SQL_TSI_YEAR").build()) {
        @Override
        public void addCount(MutableDateTime dateTime, int count) {
            dateTime.addYears(count);
        }

        @Override
        public long getDiff(Interval interval) {
            return Years.yearsIn(interval).getYears();
        }
    };

    private List<String> names;

    TSI(List<String> names) {
        this.names = names;
    }

    public static TSI getByName(String name) {
        for (TSI interval : TSI.values()) {
            if (interval.names.contains(name)) {
                return interval;
            }
        }
        return null;
    }

    public static List<String> getAllNames() {
        ImmutableList.Builder<String> builder = ImmutableList.builder();
        for (TSI interval : TSI.values()) {
            builder.addAll(interval.names);
        }
        return builder.build();
    }

    public List<String> getNames() {
        return names;
    }

    public abstract void addCount(MutableDateTime dateTime, int count);

    public abstract long getDiff(Interval interval);

}