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The following table summarizes the equivalent types between Scriptom and COM (VB6/VBA/.NET). 

Groovy/Java

VB6/VBA

VB.NET

Comments

null

Empty/Nothing

Empty/Nothing

 

VariantNull

Null

???

VariantNull is not the same as Java null. Use Scriptom.NULL.

boolean

Boolean

Boolean

 

byte

Byte

Byte/SByte

8-bit signed or unsigned integer. 0 to 255 in the COM library. -128 to 127 in Java. Conversion happens automatically.

short

Integer

Short

16-bit signed integer. -32,768 to 32,767.

(int)

-

UShort

16-bit unsigned integer. 0 to 65,535.

int

Long

Integer

32-bit signed integer. -2,147,483,648 to 2,147,483,647.

(long)

-

UInteger

32-bit unsigned integer. 0 to 4,294,967,295.

long

-

Long

64-bit signed integer. -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. 64-bit integers are not supported by COM in Windows Millenium or Windows 2000 and earlier.

(BigInteger)

-

ULong

64-bit unsigned integer. 0 to 18,446,744,073,709,551,615. 64-bit integers are not supported by COM in Windows Millenium or Windows 2000 and earlier.

float

Single

Single

Low-precision floating point. -3.402823E38 to -1.401298E-45 for negative values; 1.401298E-45 to 3.402823E38 for positive values.

double

Double

Double

High-precision floating point. The range of a Double is -1.79769313486231E308 to -4.94065645841247E-324 for negative values; 4.94065645841247E-324 to 1.79769313486232E308 for positive values.

BigDecimal

-

Decimal

Very high-precision fixed/floating point (128 bits), but without the large mantissa values supported by Double. Scriptom supports the Currency data type by converting to and from Decimal. The range of a Decimal is +/-79,228,162,514,264,337,593,543,950,335
for zero-scaled numbers (that is, numbers with no decimal places). For numbers with 28 decimal places, the range is +/-7.9228162514264337593543950335. The smallest possible non-zero number is 0.0000000000000000000000000001. If the COM library uses Currency, values are limited to -922,337,203,685,477.5808 to 922,337,203,685,477.5807.

Date

Date

Date

 

String

String

String

 

SafeArray

Array

Array

Scriptom supports multi-dimensional arrays for COM.

ActiveXObject

A COM-callable object

A COM-callable object

 

Note that implicit type conversions are supported, so you could - for instance - pass a float to a method that expects a double.  COM unsigned integer types are converted to and from the equivalent Java signed types.

(warning) CAUTION: The default floating-point type in Groovy is BigDecimal, which gets converted to a COM Decimal.  Although Decimal will work in the majority of cases, type conversions involving Decimal are inefficient compared to other numeric types.  It is a good idea to explicitly coerce Decimal values to type Double or type Integer, whichever makes the most sense.

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