Excellent Many Thks Lawrence Yau Lawrence wrote:
Hello Pascal, The simplest way to correct the problem is to change your datamodel definition to use an unnamed namespace for your poolconfiguration XML tree:... <data name="poolconfiguration"> <foo xmlns=""> <!-- override SCXML namespace --> <dir>toto</dir> <freq>1</freq> </foo> </data> ... Then your xpath expression will work. I tested your SCXML document just to be sure. Hope this helps, Lawrence -----Original Message----- From: Pascal Ravot [mailto:[EMAIL PROTECTED] Sent: 05 June 2008 9:26 To: [email protected] Subject: SCXML - XPATH Hello, I'm a perfect newbie to sxcml, so i'm probably asking stupid questions ! I'm trying to get access to the content of a datamodel from within the scxml document and a custom action : Here is the dummy state machine: <scxml xmlns="http://www.w3.org/2005/07/scxml"; version="1.0" xmlns:mc="http://com.mccsoft.scxml/action"; initialstate="start"> <!-- Defining global data --> <datamodel> <data name="timeout" expr="1" /> <data name="counter" expr="1" /> <data name="poolconfiguration"> <foo> <dir>toto</dir> <freq>1</freq> </foo> </data> </datamodel> <!-- State machine starts here --> <state id="start"> <onentry> <log expr="Data(poolconfiguration, 'foo/dir')" /> </onentry> <transition target="now_waiting" /> </state> <state id="now_waiting"> <onentry> <log expr="Counter is now counter" /> </onentry> <onentry> <mc:wait timeoutName="timeout" conf="poolconfiguration"/> <assign name="counter" expr="counter +1" /> <log expr="'Timeout is ' + timeout + ' Counter is ' + counter " /> </onentry> <transition target="now_waiting" /> </state> </scxml> Regarding execution environment everything is copied from samples using Jexl : exec = new SCXMLExecutor(new JexlEvaluator(), new SimpleDispatcher(), new SimpleErrorReporter()); exec.setStateMachine(scxml); exec.setRootContext(new JexlContext()); I've got a custom action <mc:wait ...> that get the name of the data entry to inspect... Within the execute of the action i'm trying to do roughly but with java the equivalent of <log expr="Data(poolconfiguration, 'foo/dir')" /> --> scInstance.getEvaluator().eval( scInstance.getRootContext(), "Data(" + conf + ",'foo/dir')"); My objective is to be able to access sub elements of a defined data (in this case poolconfiguration/foo/dir) of a top level datamodel. and that either by scxml script or within custom action. Unfortunately, none of those evaluation is returning the expected "toto". I got in the log : 1922 [main] DEBUG org.apache.commons.jexl.ExpressionFactory - Parsing expression: _builtin.data(_ALL_NAMESPACES, poolconfiguration, 'foo/dir'); 4500 [main] WARN org.apache.commons.scxml.Builtin - Data(): No nodes matching the XPath expression "foo/dir", returning null or 126125 [main] DEBUG org.apache.commons.scxml.Builtin - Turning off namespaced XPath evaluation since no namespace information is available for path: foo/dir 126140 [main] WARN org.apache.commons.scxml.Builtin - Data(): No nodes matching the XPath expression "foo/dir", returning null (for the custom action). The strange point is that, after debugging this sample, it appeared that the poolconfiguration node is correctly extracted by the Data expression. I mean the datanode found in the _builtin seems ok (with childs, sieblings...), but this piece of code (org.apache.commons.scxml.Builtin.java): result = XPathAPI.selectNodeList(dataNode, path); returns an empty list. It is most obvious (to everybody except me) that i've probably spelled the XPATH in an incorrect way, but i've tried may path without success ( '//dir', '/data/foo/dir', 'data/foo/dir'...) So any help or idea is welcomed !!!! By advance thanks. P. Ravot. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
-- *Pascal Ravot* /Partner Manager/ ------------------------------------------------------------------------ *M*essage *C*ommunication *C*onseil *SAS* 35 rue Chanzy Paris F-75011 France Phone : 33 1 44 93 24 24 *M*CC *L*AB *I*NFO *SRL* Punct de lucru: Bucuresti, Sector 3, Str. Corneliu Coposcu nr 3, bl 101 email : [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> Web : http://www.mcc-soft.com <http://www.mcc-soft.com/> ------------------------------------------------------------------------ --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
