VectorUDFWeekOfYearDate.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.exec.vector.expressions;

import java.util.Calendar;

/**
 * Expression to get week of year.
 * Extends {@link VectorUDFTimestampFieldDate}
 */
public final class VectorUDFWeekOfYearDate extends VectorUDFTimestampFieldDate {

  private static final long serialVersionUID = 1L;

  public VectorUDFWeekOfYearDate(int colNum, int outputColumn) {
    super(Calendar.WEEK_OF_YEAR, colNum, outputColumn);
    initCalendar();
  }

  public VectorUDFWeekOfYearDate() {
    super();
    initCalendar();
  }

  private void initCalendar() {
    /* code copied over from UDFWeekOfYear implementation */
    calendar.setFirstDayOfWeek(Calendar.MONDAY);
    calendar.setMinimalDaysInFirstWeek(4);
  }
}