org.h2.util

Class IntervalUtils

java.lang.Object

org.h2.util.IntervalUtils

public class IntervalUtils
extends java.lang.Object

This utility class contains interval conversion functions.

Field Summary

Fields

Modifier and Type	Field and Description
static java.math.BigInteger	NANOS_PER_DAY_BI The number of nanoseconds per day as BigInteger.

Method Summary

Modifier and Type	Method and Description
static java.lang.StringBuilder	appendInterval(java.lang.StringBuilder buff, IntervalQualifier qualifier, boolean negative, long leading, long remaining) Formats interval as a string and appends it to a specified string builder.
static long	daysFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns days value of interval, if any.
static long	hoursFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns hours value of interval, if any.
static ValueInterval	intervalFromAbsolute(IntervalQualifier qualifier, java.math.BigInteger absolute) Converts absolute value to an interval value.
static java.math.BigInteger	intervalToAbsolute(ValueInterval interval) Converts interval value to an absolute value.
static long	minutesFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns minutes value of interval, if any.
static long	monthsFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns months value of interval, if any.
static long	nanosFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns nanoseconds value of interval, if any.
static ValueInterval	parseFormattedInterval(IntervalQualifier qualifier, java.lang.String s) Parses the specified string as INTERVAL value.
static ValueInterval	parseInterval(IntervalQualifier qualifier, boolean negative, java.lang.String s) Parses the specified string as INTERVAL value.
static boolean	validateInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Ensures that all fields in interval are valid.
static long	yearsFromInterval(IntervalQualifier qualifier, boolean negative, long leading, long remaining) Returns years value of interval, if any.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NANOS_PER_DAY_BI

public static final java.math.BigInteger NANOS_PER_DAY_BI

The number of nanoseconds per day as BigInteger.

Method Detail

parseFormattedInterval

public static ValueInterval parseFormattedInterval(IntervalQualifier qualifier,
                                                   java.lang.String s)

Parses the specified string as INTERVAL value.

Parameters:

qualifier - the default qualifier to use if string does not have one

s - the string with type information to parse

Returns:

the interval value. Type of value can be different from the specified qualifier.

parseInterval

public static ValueInterval parseInterval(IntervalQualifier qualifier,
                                          boolean negative,
                                          java.lang.String s)

Parses the specified string as INTERVAL value.

Parameters:

qualifier - the qualifier of interval

negative - whether the interval is negative

s - the string to parse

Returns:

the interval value

appendInterval

public static java.lang.StringBuilder appendInterval(java.lang.StringBuilder buff,
                                                     IntervalQualifier qualifier,
                                                     boolean negative,
                                                     long leading,
                                                     long remaining)

Formats interval as a string and appends it to a specified string builder.

Parameters:

buff - string builder to append to

qualifier - qualifier of the interval

negative - whether interval is negative

leading - the value of leading field

remaining - the value of all remaining fields

Returns:

the specified string builder

intervalToAbsolute

public static java.math.BigInteger intervalToAbsolute(ValueInterval interval)

Converts interval value to an absolute value.

Parameters:

interval - the interval value

Returns:

absolute value in months for year-month intervals, in nanoseconds for day-time intervals

intervalFromAbsolute

public static ValueInterval intervalFromAbsolute(IntervalQualifier qualifier,
                                                 java.math.BigInteger absolute)

Converts absolute value to an interval value.

Parameters:

qualifier - the qualifier of interval

absolute - absolute value in months for year-month intervals, in nanoseconds for day-time intervals

Returns:

the interval value

validateInterval

public static boolean validateInterval(IntervalQualifier qualifier,
                                       boolean negative,
                                       long leading,
                                       long remaining)

Ensures that all fields in interval are valid.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

fixed value of negative field

yearsFromInterval

public static long yearsFromInterval(IntervalQualifier qualifier,
                                     boolean negative,
                                     long leading,
                                     long remaining)

Returns years value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

years, or 0

monthsFromInterval

public static long monthsFromInterval(IntervalQualifier qualifier,
                                      boolean negative,
                                      long leading,
                                      long remaining)

Returns months value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

months, or 0

daysFromInterval

public static long daysFromInterval(IntervalQualifier qualifier,
                                    boolean negative,
                                    long leading,
                                    long remaining)

Returns days value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

days, or 0

hoursFromInterval

public static long hoursFromInterval(IntervalQualifier qualifier,
                                     boolean negative,
                                     long leading,
                                     long remaining)

Returns hours value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

hours, or 0

minutesFromInterval

public static long minutesFromInterval(IntervalQualifier qualifier,
                                       boolean negative,
                                       long leading,
                                       long remaining)

Returns minutes value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

minutes, or 0

nanosFromInterval

public static long nanosFromInterval(IntervalQualifier qualifier,
                                     boolean negative,
                                     long leading,
                                     long remaining)

Returns nanoseconds value of interval, if any.

Parameters:

qualifier - qualifier

negative - whether interval is negative

leading - value of leading field

remaining - values of all remaining fields

Returns:

nanoseconds, or 0