[jboss-jira] [JBoss JIRA] Commented: (BPEL-301) getVariableData function does not return the actual value even for simple typed variables
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https://jira.jboss.org/jira/browse/BPEL-301?page=com.atlassian.jira.plugi...
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Alejandro Guizar commented on BPEL-301:
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The BPEL 1.1 specification simply states that the function extracts the value of the
variable. It says nothing about how the variable value is manifested. Even BPEL 2.0 does
not mandate a specific manifestation*:
"If a WS-BPEL implementation chooses to manifest a simple type variable as an XML
infoset, the infoset SHOULD consist of a DII that contains exactly one child, which is an
EII referenced by the document element property. The properties of the document element,
specifically the namespace name and local name properties, are undefined by this
specification. An implementation MUST specify a namespace name/local name value. However
the children of the document element MUST exclusively consist of a series of Character
Information Items (CIIs) that represent the simple type value. A WS-BPEL implementation
MAY choose to map simple type variables to non-XML-infoset data-models defined in the
expression/query language being used (e.g. Boolean in XPath 1.0)."
In jBPM BPEL a simple type variable is manifested as a DII that contains exactly one
child, the document element. Said EII exclusively consists of a series of CIIs. jBPM BPEL
chose not to map simple type variables to non-XML-infoset data models. Still it
contradicts neither BPEL 1.1 nor BPEL 2.0.
A portable process should not assume variables are mapped to the data model defined in the
expression language. In XPath 1.0, conversion functions should always be used whenever the
return type of a function is undetermined.
$array[number($var)]
(*) http://docs.oasis-open.org/wsbpel/2.0/OS/wsbpel-v2.0-OS.html#_Toc164738495
getVariableData function does not return the actual value even for
simple typed variables
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Key: BPEL-301
URL: https://jira.jboss.org/jira/browse/BPEL-301
Project: JBoss jBPM BPEL
Issue Type: Bug
Security Level: Public(Everyone can see)
Components: Engine
Affects Versions: jBPM BPEL 1.1 GA
Reporter: Jay Yan
Assignee: Alejandro Guizar
Original Estimate: 1 week
Remaining Estimate: 1 week
According to BPEL 1.1 Spec, the function getVariableData should behave in this way:
"When only the first argument is present, the function extracts the value of the
variable, which in this case must be defined using an XML Schema simple type or element.
Otherwise, the return value of this function is a node set containing the single
node..."
However, even when a variable is defined using a simple type such as
type="xsd:int", getVariableData () call on that variable still return the node
instead of the numeric value. As the result, array[getVariableData(var)] does not work,
while array[position()=getVariableData(var)] and array[number(getVariableData(var))] both
work.
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