com.ebay.nest.io.sede.lazy.LazyTimestamp.java Source code

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Here is the source code for com.ebay.nest.io.sede.lazy.LazyTimestamp.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 com.ebay.nest.io.sede.lazy;

import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.sql.Timestamp;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.ebay.nest.io.sede.TimestampWritable;
import com.ebay.nest.io.sede.lazy.objectinspector.primitive.LazyTimestampObjectInspector;

/**
 *
 * LazyTimestamp.
 * Serializes and deserializes a Timestamp in the JDBC timestamp format
 *
 *    YYYY-MM-DD HH:MM:SS.[fff...]
 *
 */
public class LazyTimestamp extends LazyPrimitive<LazyTimestampObjectInspector, TimestampWritable> {
    static final private Log LOG = LogFactory.getLog(LazyTimestamp.class);

    public LazyTimestamp(LazyTimestampObjectInspector oi) {
        super(oi);
        data = new TimestampWritable();
    }

    public LazyTimestamp(LazyTimestamp copy) {
        super(copy);
        data = new TimestampWritable(copy.data);
    }

    /**
     * Initilizes LazyTimestamp object by interpreting the input bytes
     * as a JDBC timestamp string
     *
     * @param bytes
     * @param start
     * @param length
     */
    @Override
    public void init(ByteArrayRef bytes, int start, int length) {
        String s = null;
        try {
            s = new String(bytes.getData(), start, length, "US-ASCII");
        } catch (UnsupportedEncodingException e) {
            LOG.error(e);
            s = "";
        }

        Timestamp t = null;
        if (s.compareTo("NULL") == 0) {
            isNull = true;
            logExceptionMessage(bytes, start, length, "TIMESTAMP");
        } else {
            try {
                t = Timestamp.valueOf(s);
                isNull = false;
            } catch (IllegalArgumentException e) {
                isNull = true;
                logExceptionMessage(bytes, start, length, "TIMESTAMP");
            }
        }
        data.set(t);
    }

    private static final String nullTimestamp = "NULL";

    /**
     * Writes a Timestamp in JDBC timestamp format to the output stream
     * @param out
     *          The output stream
     * @param i
     *          The Timestamp to write
     * @throws IOException
     */
    public static void writeUTF8(OutputStream out, TimestampWritable i) throws IOException {
        if (i == null) {
            // Serialize as time 0
            out.write(TimestampWritable.nullBytes);
        } else {
            out.write(i.toString().getBytes("US-ASCII"));
        }
    }

    @Override
    public TimestampWritable getWritableObject() {
        return data;
    }
}