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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.search.grouping.request;
/**
* This abstract class is a factory for timestamp functions in a {@link GroupingExpression}. Apart from offering
* per-function factory methods, this class also contains a {@link #newInstance(com.yahoo.search.grouping.request.TimeFunctions.Type,
* GroupingExpression)} method which is useful for runtime construction of grouping requests.
*
* @author Simon Thoresen Hult
*/
public abstract class TimeFunctions {
/**
* Defines the different types of timestamps-functions that are available.
*/
public enum Type {
DATE,
DAY_OF_MONTH,
DAY_OF_WEEK,
DAY_OF_YEAR,
HOUR_OF_DAY,
MINUTE_OF_HOUR,
MONTH_OF_YEAR,
SECOND_OF_MINUTE,
YEAR
}
/**
* Creates a new timestamp-function of the specified type for the given {@link GroupingExpression}.
*
* @param type The type of function to create.
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static FunctionNode newInstance(Type type, GroupingExpression exp) {
switch (type) {
case DATE:
return newDate(exp);
case DAY_OF_MONTH:
return newDayOfMonth(exp);
case DAY_OF_WEEK:
return newDayOfWeek(exp);
case DAY_OF_YEAR:
return newDayOfYear(exp);
case HOUR_OF_DAY:
return newHourOfDay(exp);
case MINUTE_OF_HOUR:
return newMinuteOfHour(exp);
case MONTH_OF_YEAR:
return newMonthOfYear(exp);
case SECOND_OF_MINUTE:
return newSecondOfMinute(exp);
case YEAR:
return newYear(exp);
}
throw new UnsupportedOperationException("Time function '" + type + "' not supported.");
}
/**
* Creates a new instance of {@link DateFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static DateFunction newDate(GroupingExpression exp) {
return new DateFunction(exp);
}
/**
* Creates a new instance of {@link DayOfMonthFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static DayOfMonthFunction newDayOfMonth(GroupingExpression exp) {
return new DayOfMonthFunction(exp);
}
/**
* Creates a new instance of {@link DayOfWeekFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static DayOfWeekFunction newDayOfWeek(GroupingExpression exp) {
return new DayOfWeekFunction(exp);
}
/**
* Creates a new instance of {@link DayOfYearFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static DayOfYearFunction newDayOfYear(GroupingExpression exp) {
return new DayOfYearFunction(exp);
}
/**
* Creates a new instance of {@link HourOfDayFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static HourOfDayFunction newHourOfDay(GroupingExpression exp) {
return new HourOfDayFunction(exp);
}
/**
* Creates a new instance of {@link MinuteOfHourFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static MinuteOfHourFunction newMinuteOfHour(GroupingExpression exp) {
return new MinuteOfHourFunction(exp);
}
/**
* Creates a new instance of {@link MonthOfYearFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static MonthOfYearFunction newMonthOfYear(GroupingExpression exp) {
return new MonthOfYearFunction(exp);
}
/**
* Creates a new instance of {@link SecondOfMinuteFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static SecondOfMinuteFunction newSecondOfMinute(GroupingExpression exp) {
return new SecondOfMinuteFunction(exp);
}
/**
* Creates a new instance of {@link YearFunction} for the given {@link GroupingExpression}.
*
* @param exp The expression to evaluate, must evaluate to a long.
* @return The created function node.
*/
public static YearFunction newYear(GroupingExpression exp) {
return new YearFunction(exp);
}
}
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