gov.noaa.pfel.erddap.util

Class Math2

java.lang.Object

gov.noaa.pfel.erddap.util.Math2

public class Math2
extends Object

The Math2 class has several static Math-related methods.

• These are low level routines used by most other CoHort classes.
• Many provide additional protection from run-time errors.

Field Summary

Fields

Modifier and Type	Field and Description
static String	memoryArraySize
static String	memoryTooMuchData These are *not* final so EDStatic can replace them with translated Strings.

Constructor Summary

Constructors

Constructor and Description
Math2()

Method Summary

Methods

Modifier and Type	Method and Description
static void	ensureArraySizeOkay(long tSize, String attributeTo) Even if JavaBits is 64, the limit on an array size is Integer.MAX_VALUE.
static boolean	isFinite(double d) Checks if the value is not NaN or +-Infinite.
static int	roundToInt(double d) Safely rounds a double to an int.

Methods inherited from class java.lang.Object

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

Field Detail

memoryTooMuchData

public static String memoryTooMuchData

These are *not* final so EDStatic can replace them with translated Strings. These are MessageFormat-style strings, so any single quote ' must be escaped as ''.

memoryArraySize

public static String memoryArraySize

Constructor Detail

Math2

public Math2()

Method Detail

isFinite

public static boolean isFinite(double d)

Checks if the value is not NaN or +-Infinite. This works for floats.

Parameters:

d - any double value or float value

Returns:

true if d is is not NaN or +/-infinity.

ensureArraySizeOkay

public static void ensureArraySizeOkay(long tSize,
                       String attributeTo)

Even if JavaBits is 64, the limit on an array size is Integer.MAX_VALUE.

This is almost identical to EDStatic.ensureArraySizeOkay, but lacks tallying.

Parameters:

tSize -

attributeTo - for a WARNING or ERROR message, this is the string to which this not-enough-memory issue should be attributed.

roundToInt

public static int roundToInt(double d)

Safely rounds a double to an int. (Math.round but rounds to a long and not safely.)

Parameters:

d - any double

Returns:

Integer.MAX_VALUE if d is too small, too big, or NaN; otherwise d, rounded to the nearest int. Undesirable: d.5 rounds up for positive numbers, down for negative.