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

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Here is the source code for com.ebay.nest.io.sede.lazy.LazyDate.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.nio.ByteBuffer;
import java.sql.Date;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.io.Text;

import com.ebay.nest.io.sede.DateWritable;
import com.ebay.nest.io.sede.lazy.objectinspector.primitive.LazyDateObjectInspector;

/**
 *
 * LazyDate.
 * Serializes and deserializes a Date in the SQL date format
 *
 *    YYYY-MM-DD
 *
 */
public class LazyDate extends LazyPrimitive<LazyDateObjectInspector, DateWritable> {
    private static final Log LOG = LogFactory.getLog(LazyDate.class);

    public LazyDate(LazyDateObjectInspector oi) {
        super(oi);
        data = new DateWritable();
    }

    public LazyDate(LazyDate copy) {
        super(copy);
        data = new DateWritable(copy.data);
    }

    /**
     * Initializes LazyDate object by interpreting the input bytes as a SQL date string.
     *
     * @param bytes
     * @param start
     * @param length
     */
    @Override
    public void init(ByteArrayRef bytes, int start, int length) {
        String s = null;
        try {
            s = Text.decode(bytes.getData(), start, length);
            data.set(Date.valueOf(s));
            isNull = false;
        } catch (Exception e) {
            isNull = true;
            logExceptionMessage(bytes, start, length, "DATE");
        }
    }

    /**
     * Writes a Date in SQL date format to the output stream.
     * @param out
     *          The output stream
     * @param i
     *          The Date to write
     * @throws IOException
     */
    public static void writeUTF8(OutputStream out, DateWritable d) throws IOException {
        ByteBuffer b = Text.encode(d.toString());
        out.write(b.array(), 0, b.limit());
    }

}