org.apache.hadoop.hive.serde2.lazy.LazyTimestamp Maven / Gradle / Ivy
/*
* 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.lazy;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.sql.Timestamp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.hive.serde2.io.TimestampWritable;
import org.apache.hadoop.hive.serde2.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 {
private static final Logger LOG = LoggerFactory.getLogger(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;
if (!LazyUtils.isDateMaybe(bytes.getData(), start, length)) {
isNull = true;
return;
}
try {
s = new String(bytes.getData(), start, length, "US-ASCII");
} catch (UnsupportedEncodingException e) {
LOG.error("Unsupported encoding found ", e);
s = "";
}
Timestamp t = null;
if (s.compareTo("NULL") == 0) {
isNull = true;
logExceptionMessage(bytes, start, length, "TIMESTAMP");
} else {
try {
t = oi.getTimestampParser().parseTimestamp(s);
isNull = false;
} catch (IllegalArgumentException e) {
isNull = true;
logExceptionMessage(bytes, start, length, "TIMESTAMP");
}
}
data.set(t);
}
/**
* 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;
}
}