org.apache.hadoop.hive.serde2.lazybinary.LazyBinaryBoolean 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.lazybinary;

import org.apache.hadoop.hive.serde2.lazy.ByteArrayRef;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableBooleanObjectInspector;
import org.apache.hadoop.io.BooleanWritable;

/**
 * LazyBinaryObject for boolean which takes one byte
 * 
 * 
 * Part of the code is adapted from Apache Harmony Project.
 * 
 * As with the specification, this implementation relied on code laid out in Henry S. Warren, Jr.'s Hacker's
 * Delight, (Addison Wesley, 2002) as well as The Aggregate's Magic Algorithms.
 * 
 * 
 */
public class LazyBinaryBoolean extends
    LazyBinaryPrimitive {

  public LazyBinaryBoolean(WritableBooleanObjectInspector oi) {
    super(oi);
    data = new BooleanWritable();
  }

  public LazyBinaryBoolean(LazyBinaryBoolean copy) {
    super(copy);
    data = new BooleanWritable(copy.data.get());
  }

  @Override
  public void init(ByteArrayRef bytes, int start, int length) {
    assert (1 == length);
    byte val = bytes.getData()[start];
    if (val == 0) {
      data.set(false);
    } else if (val == 1) {
      data.set(true);
    }
  }
}