org.apache.tajo.datum.TimestampDatum.java Source code

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Here is the source code for org.apache.tajo.datum.TimestampDatum.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 org.apache.tajo.datum;

import com.google.common.base.Objects;
import org.apache.commons.lang.StringUtils;
import org.apache.tajo.common.TajoDataTypes;
import org.apache.tajo.datum.exception.InvalidOperationException;
import org.apache.tajo.util.Bytes;
import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

public class TimestampDatum extends Datum {
    public static final int SIZE = 8;
    /** ISO 8601/SQL standard format - ex) 1997-12-17 07:37:16-08 */
    public static final String DEFAULT_FORMAT_STRING = "yyyy-MM-dd HH:mm:ss";
    public static final String FRACTION_FORMAT_STRING = "yyyy-MM-dd HH:mm:ss.SSS";
    private static final DateTimeFormatter DEFAULT_FORMATTER = DateTimeFormat.forPattern(DEFAULT_FORMAT_STRING);
    private static final DateTimeFormatter FRACTION_FORMATTER = DateTimeFormat.forPattern(FRACTION_FORMAT_STRING);
    private final DateTime dateTime;

    public TimestampDatum(int timestamp) {
        super(TajoDataTypes.Type.TIMESTAMP);
        dateTime = new DateTime((long) timestamp * 1000);
    }

    public TimestampDatum(DateTime dateTime) {
        super(TajoDataTypes.Type.TIMESTAMP);
        this.dateTime = dateTime;
    }

    TimestampDatum(byte[] bytes) {
        super(TajoDataTypes.Type.TIMESTAMP);
        this.dateTime = new DateTime(Bytes.toLong(bytes));
    }

    public TimestampDatum(String datetime) {
        super(TajoDataTypes.Type.TIMESTAMP);
        this.dateTime = DateTime.parse(datetime, DEFAULT_FORMATTER);
    }

    public int getUnixTime() {
        return (int) (dateTime.getMillis() / 1000);
    }

    public long getMillis() {
        return dateTime.getMillis();
    }

    public DateTime getDateTime() {
        return dateTime;
    }

    public int getCenturyOfEra() {
        return dateTime.getCenturyOfEra();
    }

    public int getEra() {
        return dateTime.getEra();
    }

    public int getYear() {
        return dateTime.getYear();
    }

    public int getMonthOfYear() {
        return dateTime.getMonthOfYear();
    }

    public int getDayOfWeek() {
        return dateTime.getDayOfWeek();
    }

    public int getDayOfYear() {
        return dateTime.getDayOfYear();
    }

    public int getDayOfMonth() {
        return dateTime.getDayOfMonth();
    }

    public int getHourOfDay() {
        return dateTime.getHourOfDay();
    }

    public int getMinuteOfHour() {
        return dateTime.getMinuteOfHour();
    }

    public int getSecondOfDay() {
        return dateTime.getSecondOfDay();
    }

    public int getSecondOfMinute() {
        return dateTime.getSecondOfMinute();
    }

    public int getMillisOfSecond() {
        return dateTime.getMillisOfSecond();
    }

    public int getWeekyear() {
        return dateTime.getWeekyear();
    }

    public int getWeekOfWeekyear() {
        return dateTime.getWeekOfWeekyear();
    }

    @Override
    public long asInt8() {
        return dateTime.getMillis();
    }

    public String toString() {
        return asChars();
    }

    @Override
    public String asChars() {
        if (getMillisOfSecond() > 0) {
            return StringUtils.stripEnd(dateTime.toString(FRACTION_FORMATTER), "0");
        } else {
            return dateTime.toString(DEFAULT_FORMATTER);
        }
    }

    public String toChars(DateTimeFormatter format) {
        return dateTime.toString(format);
    }

    @Override
    public int size() {
        return SIZE;
    }

    @Override
    public byte[] asByteArray() {
        return Bytes.toBytes(dateTime.getMillis());
    }

    @Override
    public Datum equalsTo(Datum datum) {
        if (datum.type() == TajoDataTypes.Type.TIME) {
            return DatumFactory.createBool(dateTime.equals(((TimestampDatum) datum).dateTime));
        } else if (datum instanceof NullDatum || datum.isNull()) {
            return datum;
        } else {
            throw new InvalidOperationException();
        }
    }

    @Override
    public int compareTo(Datum datum) {
        if (datum.type() == TajoDataTypes.Type.TIMESTAMP) {
            return dateTime.compareTo(((TimestampDatum) datum).dateTime);
        } else if (datum instanceof NullDatum || datum.isNull()) {
            return -1;
        } else {
            throw new InvalidOperationException();
        }
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof NullDatum) {
            return false;
        }
        if (obj instanceof TimestampDatum) {
            TimestampDatum another = (TimestampDatum) obj;
            return dateTime.isEqual(another.dateTime);
        } else {
            throw new InvalidOperationException();
        }
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(dateTime);
    }
}