/**
* 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.hive.common.util;
import java.math.BigDecimal;
import java.text.SimpleDateFormat;
/**
* DateUtils. Thread-safe class
*
*/
public class DateUtils {
private static final ThreadLocal<SimpleDateFormat> dateFormatLocal = new ThreadLocal<SimpleDateFormat>() {
@Override
protected SimpleDateFormat initialValue() {
return new SimpleDateFormat("yyyy-MM-dd");
}
};
public static SimpleDateFormat getDateFormat() {
return dateFormatLocal.get();
}
public static final int NANOS_PER_SEC = 1000000000;
public static final BigDecimal MAX_INT_BD = new BigDecimal(Integer.MAX_VALUE);
public static final BigDecimal NANOS_PER_SEC_BD = new BigDecimal(NANOS_PER_SEC);
public static int parseNumericValueWithRange(String fieldName,
String strVal, int minValue, int maxValue) throws IllegalArgumentException {
int result = 0;
if (strVal != null) {
result = Integer.parseInt(strVal);
if (result < minValue || result > maxValue) {
throw new IllegalArgumentException(String.format("%s value %d outside range [%d, %d]",
fieldName, result, minValue, maxValue));
}
}
return result;
}
// From java.util.Calendar
private static final String[] FIELD_NAME = {
"ERA", "YEAR", "MONTH", "WEEK_OF_YEAR", "WEEK_OF_MONTH", "DAY_OF_MONTH",
"DAY_OF_YEAR", "DAY_OF_WEEK", "DAY_OF_WEEK_IN_MONTH", "AM_PM", "HOUR",
"HOUR_OF_DAY", "MINUTE", "SECOND", "MILLISECOND", "ZONE_OFFSET",
"DST_OFFSET"
};
/**
* Returns the name of the specified calendar field.
*
* @param field the calendar field
* @return the calendar field name
* @exception IndexOutOfBoundsException if <code>field</code> is negative,
* equal to or greater then <code>FIELD_COUNT</code>.
*/
public static String getFieldName(int field) {
return FIELD_NAME[field];
}
}