The following tables detail the conversions between various XLANG/s constructs and BPEL4WS constructs.
 Caution |
|---|
| XPath 1.1 does not support numbers in exponential or double formats. Literal values in these formats in XLANG/s orchestrations are exported to BPEL4WS using the %f format, and a loss of precision might result. |
Literals (if the literal is part of an expression)
| XLANG/s | BPEL4WS |
|---|---|
|
String, character |
XPath string |
|
Integer, real |
XPath number |
|
Boolean "true", "false" |
XPath true(), false() functions |
Literals (standalone assignment)
| XLANG/s | BPEL4WS |
|---|---|
|
Literal constant |
XSD equivalent |
Variables
| XLANG/s | BPEL4WS |
|---|---|
|
Variable reference |
bpws:getContainerData(%varName%, part, %locationPath%) |
|
Message reference (.NET type) |
bpws:getContainerData(%msgName%, part, %locationPath%) |
|
Message-part reference |
bpws:getContainerData(%msgName%, %locationPath%) |
|
Distinguished-field reference |
bpws:getContainerData(%msgName%, %partName%, %locationPath%) |
|
Message data-property reference |
bpws:getContainerProperty(%msgName%, %propertyQName%) |
Operators
| XLANG/s | BPEL4WS |
|---|---|
|
Unary + |
Ignored |
|
Unary - |
XPath unary - |
|
Unary ! |
XPath not() function |
|
Binary &&, || |
XPath 'and', 'or' operators |
|
Binary ==, !=, <=, <, >=, > |
XPath '=', '! =', '<=', '<', '>=', '>' operators |
|
Binary +, -, *, % with both integral operands |
XPath '+', '-', '*', 'mod' operators |
XLANG/s constructs that are disallowed in BPEL4WS
-
Message context-property reference
-
Service-property reference
-
Port-property reference
-
Service link-property reference
-
Unary – with non-integral type
-
Unary ~
-
Cast operator
-
Binary / with integral operands
-
Binary +, -, *, %, / with non-integral operands
-
Binary <=, <, >=, > with non-string operands
-
Bitwise operators &, ^, |
-
Shift operators <<, >>
-
Checked expression
-
Intrinsic expression
-
Pre- and post- increment and decrement ++, --
-
Object invocation (with our without out and/or ref params)
-
'new' operator