org.apache.druid.sql.calcite.expression.TimeUnits 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.druid.sql.calcite.expression;
import com.google.common.collect.ImmutableMap;
import org.apache.calcite.avatica.util.TimeUnitRange;
import org.joda.time.Period;
import javax.annotation.Nullable;
import java.util.Map;
public class TimeUnits
{
private static final Map PERIOD_MAP = ImmutableMap.builder()
.put(TimeUnitRange.SECOND, Period.seconds(1))
.put(TimeUnitRange.MINUTE, Period.minutes(1))
.put(TimeUnitRange.HOUR, Period.hours(1))
.put(TimeUnitRange.DAY, Period.days(1))
.put(TimeUnitRange.WEEK, Period.weeks(1))
.put(TimeUnitRange.MONTH, Period.months(1))
.put(TimeUnitRange.QUARTER, Period.months(3))
.put(TimeUnitRange.YEAR, Period.years(1))
.build();
/**
* Returns the Druid QueryGranularity corresponding to a Calcite TimeUnitRange, or null if there is none.
*
* @param timeUnitRange time unit
*
* @return queryGranularity, or null
*/
@Nullable
public static Period toPeriod(final TimeUnitRange timeUnitRange)
{
return PERIOD_MAP.get(timeUnitRange);
}
}