8:26 a.m.
The XML format produced by XmlDumper is an XML representation of various
internal Descriptors used by Drools Expert and only supports features up to
4.0
It is unfortunately not the same as that stored internally in Guvnor (which
is simply a XStream representation of Guvnor's internal model).
Furthermore Guvnor's internal representation is private and subject to
change from release to release.
There is no easy way to convert from one to the other, other than writing
your own XSLT.
With kind regards,
Mike
On 29 May 2012 13:36, Anirban Bandyopadhyay <
Anirban.Bandyopadhyay(a)monitisegroup.com> wrote:
Hi,****
** **
We have a set of rule files in DRL format. We couldn’t find a way (tool)
of importing them into Guvnor as BRL file so that we can edit using the
designer.****
** **
We ended up using the DrlParser and XmlDumper to transform them from DRL
to BRL. It produces the XML and when we add it to the repository using
WebDav, Guvnor lists the files under Business Rule which is perfect. BUT
when I try to open it, it throws the following error:****
** **
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter$Unkno
****
wnFieldException: No such field
org.drools.ide.common.client.modeldriven.brl.Rul****
eModel.rule-attribute****
---- Debugging information ----****
field : rule-attribute****
class :
org.drools.ide.common.client.modeldriven.brl.RuleModel****
required-type :
org.drools.ide.common.client.modeldriven.brl.RuleModel****
converter-type :
com.thoughtworks.xstream.converters.reflection.ReflectionC****
onverter****
path : /rule/rule-attribute****
version : null****
-------------------------------****
at
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv****
erter.determineType(AbstractReflectionConverter.java:449)****
at
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv****
erter.doUnmarshal(AbstractReflectionConverter.java:290)****
at
com.thoughtworks.xstream.converters.reflection.AbstractReflectionConv****
erter.unmarshal(AbstractReflectionConverter.java:230)****
at
com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshall****
er.java:72)****
at
com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(A****
bstractReferenceUnmarshaller.java:65)****
at
com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm****
arshaller.java:66)****
at
com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnm****
arshaller.java:50)****
at
com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller****
.java:134)****
at
com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarsh****
al(AbstractTreeMarshallingStrategy.java:32)****
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1035)**
**
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1019)**
**
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:895)****
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:886)****
at
org.drools.ide.common.server.util.BRXMLPersistence.unmarshal(BRXMLPer****
sistence.java:191)****
at
org.drools.guvnor.server.contenthandler.drools.BRLContentHandler.retr****
ieveAssetContent(BRLContentHandler.java:41)****
at
org.drools.guvnor.server.RepositoryAssetService.handlePackageItem(Rep****
ositoryAssetService.java:132)****
at
org.drools.guvnor.server.RepositoryAssetService.loadRuleAsset(Reposit****
oryAssetService.java:118)****
at
org.drools.guvnor.server.RepositoryAssetService$Proxy$_$$_WeldClientP****
roxy.loadRuleAsset(RepositoryAssetService$Proxy$_$$_WeldClientProxy.java)*
***
at
org.drools.guvnor.server.RepositoryServiceServlet.loadRuleAsset(Repos****
itoryServiceServlet.java:403)****
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)****
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.****
java:39)****
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces****
sorImpl.java:25)****
at java.lang.reflect.Method.invoke(Method.java:597)****
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:5****
69)****
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(Remot****
eServiceServlet.java:208)****
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(Remot****
eServiceServlet.java:248)****
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(Ab****
stractRemoteServiceServlet.java:62)****
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)***
*
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)***
*
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl****
icationFilterChain.java:290)****
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF****
ilterChain.java:206)****
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV****
alve.java:233)****
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextV****
alve.java:191)****
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j****
ava:127)****
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j****
ava:102)****
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal****
ve.java:109)****
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav****
a:293)****
at
org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcesso****
r.java:877)****
at
org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.pr****
ocess(Http11AprProtocol.java:594)****
at
org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:16****
75)****
at java.lang.Thread.run(Thread.java:662)****
** **
** **
I am able to re-produce the same error when I try to convert the BRL to
DRL using BRDRLPersistence and BRXMLPersistence marshalling and
unmarshalling. I checked that the field ‘rule-attribute’ is indeed not
present in org.drools.brms.client.modeldriven.brl.RuleModel. when I look
at the example brl file from the sample mortgage, they don’t have
‘rule-attribute’, and it’s not only that specific node, the whole set of
node names are different. ****
** **
>>>>>>>>>>>>>>>>>>>>>>>>>>>>**
**
** **
public void convertDrlToBrl() throws IOException, DroolsParserException {*
***
** **
Resource fileResource = new
ClassPathResource("Beneficiary_User_KYC_Level_3_Daily_Limit.drl");****
** **
DrlParser parser = new DrlParser();****
XmlDumper dumper = new XmlDumper();****
** **
Reader source = new InputStreamReader(new
FileInputStream(fileResource.getFile()));****
PackageDescr pkg = parser.parse(source);****
** **
String xmlString = dumper.dump(pkg);****
** **
System.out.println(xmlString);****
}****
** **
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<**
**
** **
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>**
**
** **
public void convertBrlToDrl() throws IOException {****
** **
Resource fileResource = new
ClassPathResource("Beneficiary_User_KYC_Level_3_Daily_Limit_BRL.brl");****
** **
String fileAsString =
FileUtils.readFileToString(fileResource.getFile());****
** **
BRDRLPersistence write = (BRDRLPersistence)
BRDRLPersistence.getInstance();****
BRXMLPersistence read = (BRXMLPersistence)
BRXMLPersistence.getInstance();****
** **
RuleModel ruleModel = read.unmarshal(fileAsString);****
String outputDRL = write.marshal(ruleModel);****
** **
System.out.println(outputDRL);****
** **
}****
** **
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<**
**
** **
Generated xml file:****
** **
===============================================****
** **
<rule name="Beneficiary_User_KYC_Level_3_Daily_Limit_BRL">****
<rule-attribute name="dialect" value="mvel" />****
** **
<lhs><pattern object-type="UserBean" >****
<field-constraint field-name="kycLevel"> ****
<literal-restriction evaluator="==" value="KYC_LEVEL_3" />****
** **
</field-constraint>****
<field-constraint field-name="userType"> ****
<literal-restriction evaluator="==" value="BENEFICIARY" />****
** **
</field-constraint>****
** **
** **
</pattern>****
** **
<pattern object-type="Activity" >****
<field-constraint field-name="type"> ****
<literal-restriction evaluator="!=" value="TRANSACTION.SEND"
/>****
** **
</field-constraint>****
** **
** **
</pattern>****
** **
** **
</lhs><rhs> Limit fact0 = new Limit();****
fact0.setType( "DAILY_TRANSACTION_LIMIT" );
****
fact0.setValue( 10000 );****
fact0.setErrorMessage( "Maximum daily
total amount of N10,000 exceeded for {0}." );****
insert(fact0 );****
</rhs>****
</rule>****
** **
================================================****
** **
** **
Am I doing something wrong? Is there a better way of converting the DRLs
to BRLs?****
** **
Thanks in advance!****
*Anirban Bandyopadhyay*
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