/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.hadoop.hive;
import java.util.Calendar;
import javax.xml.bind.DatatypeConverter;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.hive.serde2.io.ByteWritable;
import org.apache.hadoop.hive.serde2.io.DateWritable;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.hive.serde2.io.ShortWritable;
import org.apache.hadoop.hive.serde2.io.TimestampWritable;
import org.apache.hadoop.io.Writable;
import org.elasticsearch.hadoop.mr.WritableValueWriter;
import org.elasticsearch.hadoop.serialization.Generator;
/**
* Writer for the Hive specific Writable types (specifically from serde2.io package).
*/
public class HiveWritableValueWriter extends WritableValueWriter {
public HiveWritableValueWriter() {
super();
}
public HiveWritableValueWriter(boolean writeUnknownTypes) {
super(writeUnknownTypes);
}
@Override
public boolean write(Writable writable, Generator generator) {
if (writable instanceof ByteWritable) {
generator.writeNumber(((ByteWritable) writable).get());
}
else if (writable instanceof DoubleWritable) {
generator.writeNumber(((DoubleWritable) writable).get());
}
else if (writable instanceof ShortWritable) {
generator.writeNumber(((ShortWritable) writable).get());
}
// HiveDecimal - Hive 0.11+
else if (writable != null && HiveConstants.DECIMAL_WRITABLE.equals(writable.getClass().getName())) {
generator.writeString(writable.toString());
}
// pass the UNIX epoch
else if (writable instanceof TimestampWritable) {
long ts = ((TimestampWritable) writable).getTimestamp().getTime();
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(ts);
generator.writeString(DatatypeConverter.printDateTime(cal));
}
// HiveDate - Hive 0.12+
else if (writable != null && HiveConstants.DATE_WRITABLE.equals(writable.getClass().getName())) {
generator.writeString(DateWritableWriter.toES(writable));
}
// HiveVarcharWritable - Hive 0.12+
else if (writable != null && HiveConstants.VARCHAR_WRITABLE.equals(writable.getClass().getName())) {
generator.writeString(writable.toString());
}
// HiveChar - Hive 0.13+
else if (writable != null && HiveConstants.CHAR_WRITABLE.equals(writable.getClass().getName())) {
generator.writeString(StringUtils.trim(writable.toString()));
}
else {
return super.write(writable, generator);
}
return true;
}
// use nested class to efficiently get a hold of the underlying Date object (w/o doing reparsing, etc...)
private static abstract class DateWritableWriter {
static String toES(Object dateWritable) {
DateWritable dw = (DateWritable) dateWritable;
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(dw.get().getTime());
return DatatypeConverter.printDate(cal);
}
}
}