parquet-hive/parquet-hive-storage-handler/src/main/java/org/apache/hadoop/hive/ql/io/parquet/serde/primitive/ParquetByteInspector.java

/* 
 * 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.ql.io.parquet.serde.primitive;

import org.apache.hadoop.hive.serde2.io.ByteWritable;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.AbstractPrimitiveJavaObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.SettableByteObjectInspector;
import org.apache.hadoop.io.IntWritable;

/**
 * The ParquetByteInspector can inspect both ByteWritables and IntWritables into bytes.
 *
 */
public class ParquetByteInspector extends AbstractPrimitiveJavaObjectInspector implements SettableByteObjectInspector {

  ParquetByteInspector() {
    super(PrimitiveObjectInspectorUtils.byteTypeEntry);
  }

  @Override
  public Object getPrimitiveWritableObject(final Object o) {
    return o == null ? null : new ByteWritable(get(o));
  }

  @Override
  public Object create(final byte val) {
    return new ByteWritable(val);
  }

  @Override
  public Object set(final Object o, final byte val) {
    ((ByteWritable) o).set(val);
    return o;
  }

  @Override
  public byte get(Object o) {
    // Accept int writables and convert them.
    if (o instanceof IntWritable) {
      return (byte) ((IntWritable) o).get();
    }
    return ((ByteWritable) o).get();
  }
}