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* 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
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package org.elasticsearch.hadoop.hive;
import java.util.List;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.StructField;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.elasticsearch.hadoop.mr.WritableBytesConverter;
import org.elasticsearch.hadoop.util.Assert;
import org.elasticsearch.hadoop.util.BytesArray;
public class HiveBytesConverter extends WritableBytesConverter {
@Override
public void convert(Object from, BytesArray to) {
Assert.isTrue(from instanceof HiveType,
String.format("Unexpected object type, expecting [%s], given [%s]", HiveType.class, from.getClass()));
HiveType ht = (HiveType) from;
ObjectInspector oi = ht.getObjectInspector();
Assert.isTrue(Category.STRUCT == oi.getCategory(),
String.format("Unexpected object category, expecting [%s], given [%s]", Category.STRUCT, oi.getTypeName()));
StructObjectInspector soi = (StructObjectInspector) oi;
List<? extends StructField> refs = soi.getAllStructFieldRefs();
Assert.isTrue(refs.size() == 1, "When using JSON input, only one field is expected");
StructField structField = refs.get(0);
ObjectInspector foi = structField.getFieldObjectInspector();
Assert.isTrue(Category.PRIMITIVE == foi.getCategory(),
String.format("Unexpected object category, expecting [%s], given [%s]", Category.PRIMITIVE, oi.getTypeName()));
Object writable = ((PrimitiveObjectInspector) foi).getPrimitiveWritableObject(soi.getStructFieldData(ht.getObject(), structField));
// HiveVarcharWritable - Hive 0.12+
if (writable != null && HiveConstants.VARCHAR_WRITABLE.equals(writable.getClass().getName())) {
// TODO: add dedicated optimization
to.bytes(writable.toString());
return;
}
super.convert(writable, to);
}
}