[ http://issues.apache.org/jira/browse/AXIS2-608?page=comments#action_12376395 ]
Chuck Williams commented on AXIS2-608: -------------------------------------- Hi Ajith, Thanks! A fix that uses the state machines is fine with me. I only patched the older 0.94 template rather than the newer state machine 0.95 template because I already had the 0.94 patch and was more familiar with that code at the time. In addition to minOccurs=0, recursive data types are also important, i.e. an element with a subelement of the same name (and possibly the same type or possibly a different type). I believe that fixing that requires that the parse() method advance the reader past its own start element prior to parsing its properties, else there is no way to distinguish the parse element itself from a first property with the same name. This is how the patched parser starts. The other key is to ensure that the parse of each property advances past its end element, so that it is certain that the next start or end element starts a new property or ends the outer original element being parsed. I'd be happy to test a fix prior to the 1.0 release, either by loading some new files on top of RC2 or by building from svn. Please let me know if I can help test it. Thanks, Chuck > Generated ADB code fails on omitted scalar minOccurs=0 elements and recursive > data types > ---------------------------------------------------------------------------------------- > > Key: AXIS2-608 > URL: http://issues.apache.org/jira/browse/AXIS2-608 > Project: Apache Axis 2.0 (Axis2) > Type: Bug > Components: databinding > Versions: 1.0 > Environment: All > Reporter: Chuck Williams > Assignee: Ajith Harshana Ranabahu > Attachments: codegen.patch > > The patches I submitted previously (AXIS2-523) to fix various cases of > minOccurs=0 and recusive data types have been applied in 1.0 RC2 only for > elements whose types are choice particles. The underlying problems remain in > all other cases. > One case of minOccurs=0 that fails is for an omitted scalar element > (maxOccurs=1). Consider a simple string-valued element S, and a element C > that contains S with minOccurs=0. The Factory.parse() method for C generates > code to parse S that creates a SimpleElementReaderStateMachine with > setElementNameToTest() S and then calls it. But there is no S, so the state > machine fails. > An example of a recusive data type problem occurs when an element E contains > an array-valued sub-element also named E. The parser for the outer E leaves > the reader positioned at its own start element and then proceeds to search > for the array by scanning forward looking for the first <E>. It find itself > and not the inner E! > The patch resolves this issue and a set of related issues by creating a loop > invariant for the reader position. Specifically, the reader is always after > the end element of the prior element (or initially after the outer start > element) when it seeks to parse an inner element. I don't believe the code > generator can ever parse correctly without having the reader position be a > loop invariant. This is why getElementTextProperly() is essential -- because > getElementText() itself fails to position the reader properly in some cases > and it is unfortunately now in commons, as documented in the comment in > ADBBeanTemplate.xsl. > I was able to resolve these issues by using in all cases the template that > RC2 calls out as a special case for choice particles, i.e., by simply > deleting the altnerative template. Perhaps there are issues with this > template that caused it to be called out specially and used only for <choice> > particles, but I do not know what they are. I have a complex application > that uses all of these wsdl features and more that is working perfectly with > this template. > All axis2 tests pass with this template, but only after fixing a bug in one > test that is related to the issues here (PopulateMinOccurs0Test failed when > an omitted MinOccurs=0 parameter was actually missing). > The attached patch against modules/codegen fixes the issues in both > ADBBeanTemplate.xsl and PopulateMinOccurs0Test.java. This patch also > contains the patch at AXIS-607. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira
