for information about XES schema see these
pages.
Constant
This node is used to hold a single constant value (known as a 'literal'). A
nodeConstant holds one of the following types of literal: 'IntegerLiteral',
'FloatingPointLiteral', 'BooleanLiteral', 'CharacterLiteral', 'StringLiteral'
or 'NullLiteral'
An integer literal may be expressed in decimal (base 10), hexadecimal (base
16), or octal (base 8):
A floating-point literal consists of two intergers, a mantissa part and an
exponent. This may be represented by a number containing a decimal point '.'
or an exponent 'e' or both. Both the mantissa and the exponent may have a negative
sign.
A boolean literal may have the values 'true' or 'false'.
A character literal contains 'SingleCharacter' or 'EscapeSequence'
Attributes used
Only one of the following attributes may be used: "constantType","intConst","stringValue","floatValue","doubleValue","booleanValue".
Child Elements
The only child elements allowed are comments.
Schema entry
Holds a constant string, integer, floating point or boolean value
<xs:complexType name="constantType">
<xs:attribute name="intConst" type="xs:int"/>
<xs:attribute name="stringValue" type="xs:string"/>
<xs:attribute name="floatValue" type="xs:float"/>
<xs:attribute name="doubleValue" type="xs:double"/>
<xs:attribute name="booleanValue" type="xs:boolean"/>
</xs:complexType>
Examples of usage
| usage |
java example |
XES example |
| integer constant |
0; |
<constant intConst="0"/>
|
| negative integer constant |
i = -1; |
<assign operator="=">
<variable name="i"/>
<constant intConst="1"/>
</assign> |
| long integer |
3L; |
<constant stringConst="3L"/> |
| floating point constant (default is double) |
0.1; |
<constant doubleConst="0.1"/> |
| floating point constant, explicitly declaired as float |
0.2f; |
<constant doubleConst="0.2"/> |
| floating point constant, explicitly declaired as double |
0.3d; |
<constant doubleConst="0.3"/> |
| floating point with exponent |
5e-6; |
<constant doubleConst="5.0E-6"/> |
| boolean constant |
true; |
<constant boolConst="true"/> |
| character constant |
'c'; |
<constant stringConst="'c'"/> |
| unicode character |
char c = '\uFFFF'; |
<variable name="c" type="char">
<assign operator="=">
<constant stringConst="'?'"/>
</assign>
</variable> |
| octal |
0777; |
<constant intConst="777"> |
| hexadecimal |
0x7fff; |
<constant stringConst="0x7fff"> |
| string constant |
"string"; |
<constant stringConst=""string""/> |
| null reference |
null; |
<constant stringConst="null"/> |
| array initialiser list |
int v[]={1,2,3,4}; |
<variable isArray="true" name="v" type="int">
<assign operator="=">
<array>
<constant intConst="1"/>
<constant intConst="2"/>
<constant intConst="3"/>
<constant intConst="4"/>
</array>
</assign>
</variable> |
Java
x=3
y ="three"
Scala
val x=3
val y ="three"
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