org.apache.hadoop.hive.serde2.io.DateWritable.java Source code

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Here is the source code for org.apache.hadoop.hive.serde2.io.DateWritable.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.hadoop.hive.serde2.io;

import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.sql.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.WritableComparable;
import org.apache.hadoop.io.WritableUtils;

/**
 * DateWritable
 * Writable equivalent of java.sql.Date
 *
 * Dates are of the format
 *    YYYY-MM-DD
 *
 */
public class DateWritable implements WritableComparable<DateWritable> {
    static final private Log LOG = LogFactory.getLog(DateWritable.class);

    private Date date = new Date(0);

    /* Constructors */
    public DateWritable() {
    }

    public DateWritable(DateWritable d) {
        set(d);
    }

    public DateWritable(Date d) {
        set(d);
    }

    public void set(Date d) {
        if (d == null) {
            date.setTime(0);
            return;
        }
        this.date = d;
    }

    public void set(DateWritable d) {
        set(d.get());
    }

    public Date get() {
        return date;
    }

    /**
     *
     * @return time in seconds corresponding to this DateWritable
     */
    public long getTimeInSeconds() {
        return date.getTime() / 1000;
    }

    public static Date timeToDate(long l) {
        return new Date(l * 1000);
    }

    @Override
    public void readFields(DataInput in) throws IOException {
        date.setTime(WritableUtils.readVLong(in) * 1000);
    }

    @Override
    public void write(DataOutput out) throws IOException {
        WritableUtils.writeVLong(out, getTimeInSeconds());
    }

    @Override
    public int compareTo(DateWritable d) {
        long diff = date.getTime() - d.get().getTime();
        if (diff > 0) {
            return 1;
        } else if (diff == 0) {
            return 0;
        } else {
            return -1;
        }
    }

    @Override
    public boolean equals(Object o) {
        if (!(o instanceof DateWritable)) {
            return false;
        }
        return compareTo((DateWritable) o) == 0;
    }

    @Override
    public String toString() {
        return date.toString();
    }

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