Hi Samuel, Samuel Medeiros <[email protected]> wrote on 07/08/2013 05:39:34 PM:
> Hi Michael, > > A StAXSource holds an XML source, i.e., XMLStreamReader or XMLEventReader. > > In the adapter I have developed, I only have considered > XMLStreamReader as a source. > I think I also have to consider XMLEventReader and then modify my > adapter. Do you agree? Yes, that's right. Should structurally be fairly similar to what you have so far for the XMLStreamReader. > Also, I would like to know if you also have in mind any approach to > implement the StAXResult. I need to double check but I think you could wire this in as a SAX ContentHandler too, where the ContentHandler (a "SAX2StAXAdapter") takes each SAX event and converts it to a call (or multiple calls) on the XMLStreamWriter / XMLEventWriter. > Thanks, > Samuel > > 2013/7/7 <[email protected]> > Samuel, > > Thanks for your report. > > Sincerely, > Steven J. Hathaway > > > Greetings, > > > > Following the approach suggested by Michael, I have developed the first > > version of the 'StAX to SAX events' adapter. > > > > To develop it, I have created a local project (attached) with the > > following > > structure: > > > > - *org.apache.xalan.stax.StAX2SAXAdapter > > *Represents the adapter. > > - *org.apache.xalan.sax.SAXHandler > > *It's the SAX handler. It logs all incoming events into a stack. > > - *org.apache.xalan.stax.test.StAX2SAXAdapterTest > > *It tests the adapter by calling both SAXHandler > > and StAX2SAXAdapter with a common XML file and verifying that their > > event > > stacks are equal. > > - *org.apache.xalan.stax.resource > > *This package contains some XML files used in the tests: xalam.xml, > > birds.xml and xmark.xml. This last one is not included into the > > attached > > .zip file because its size is 35,7 MB. I have generated it using XMark > > ( > > http://www.xml-benchmark.org/downloads.html). > > > > > > As provided in the plan, this week I should study how to implement > > StAXResult support, but I can also start integrating this adapter into the > > Xalan code. > > > > Michael, what do you advise me to do? > > > > I am looking forward to having your feedback about this adapter. > > > > Thanks, > > Samuel Queiroz > > > > > > 2013/6/25 Michael Glavassevich <[email protected]> > > > >> Hi Samuel, > >> > >> Xerces has partial support for StAX but doesn't yet have an > >> implementation > >> of XMLStreamReader. > >> > >> For testing purposes I'd suggest using Woodstox [1]. It's a popular open > >> source StAX implementation which many Apache projects already use. > >> > >> There's also a complete implementation of StAX in all versions of Java > >> 6+, > >> so you could use that for testing too. > >> > >> Thanks. > >> > >> [1] http://woodstox.codehaus.org/ > >> > >> Michael Glavassevich > >> XML Technologies and WAS Development > >> IBM Toronto Lab > >> E-mail: [email protected] > >> E-mail: [email protected] > >> > >> Samuel Medeiros <[email protected]> wrote on 06/25/2013 11:19:00 AM: > >> > >> > Hi Michael, > >> > > >> > Please disconsider my first email in this thread. > >> > I was thinking about implement StAX. However, this project is > >> > nothing to do with this. > >> > > >> > I have read the tutorial [1] and the ideas got more clear for me: > >> > In fact, what is proposed is to accomplish the XLS Transformation by > >> > receiving a StAXSource and sending the result trough a StAXResult. > >> > > >> > The approach you have proposed in your last message is now clear for > >> > me: I have to iterate over the StAXSource by using an XMLEventReader > >> > / XMLStreamReader and translate these events to SAX ones. > >> > > >> > I just have to check how to apply this approach into the code. > >> > > >> > -- > >> > > >> > I know the implementation is based on the interfaces defined by > >> > JAXP. However, for run the samples as well as the tests I will > >> > write, we are gonna need an implementation. By default, Xalan uses > >> > Xerces. The question is: does Xerces support StAX? > >> > > >> > Thanks, > >> > Samuel > >> > > >> > [1] http://tutorials.jenkov.com/java-xml/index.html > >> > >> > 2013/6/25 Samuel Medeiros <[email protected]> > >> > Hi Michael, > >> > > >> > Thanks for this information. > >> > I am gonna study exactly how to apply this approach into the source > >> code. > >> > > >> > If I have questions, I will let you know. > >> > > >> > Sincerely, > >> > Samuel > >> > > >> > >> > 2013/6/24 Michael Glavassevich <[email protected]> > >> > Hi Samuel, > >> > > >> > One approach you could take for StAXSource would be to write a StAX to > >> SAX > >> > converter. This would take an XMLStreamReader / XMLEventReader as > >> input > >> > and generate SAX events on to a ContentHandler. You could wire that to > >> the > >> > TemplatesHandler (org.apache.xalan.processor.StylesheetHandler) > >> allowing > >> > you to reuse the existing components for building the Templates > >> object. > >> > > >> > Thanks for the update. > >> > > >> > Michael Glavassevich > >> > XML Technologies and WAS Development > >> > IBM Toronto Lab > >> > E-mail: [email protected] > >> > E-mail: [email protected] > >> > > >> > Samuel Medeiros <[email protected]> wrote on 06/23/2013 04:30:38 > >> PM: > >> > > >> > > Hi Michael, > >> > > > >> > > I have read the documentation available at the Xalan's website and > >> > > also its pointers to XSL/XSLT, XPath and JAXP. I have also run some > >> > > samples and did some tracing by adding some prints into the code. > >> > > > >> > > It's quite clear for me how the things work, but I am not > >> > > familiarized enough with the code. > >> > > > >> > > According to [1], the javax.xml.transform.stax was added to support > >> > > StAX. This package consists of the interfaces: TemplatesHandler > >> > > and TransformerHandler; and classes: StAXResult and StAXSource. > >> > > Also, the packages javax.xml.stream, javax.xml.stream.events and > >> > > javax.xml.stream.util were added to support StAX. In addition, the > >> > > class Validator have also to accept StAXSource. > >> > > > >> > > For me, to add StAX support, it would be just implement the > >> > > interfaces provided by these packages and plug them into the > >> > > existent code. For example, in the > >> > > org.apache.xalan.processor.TransformerFactoryImpl's method > >> > > newTemplates(Source source), I would add a condition to test if the > >> > > source is a StAX one and then create the correct TemplatesHandler > >> > > instance, that will create the Templates object. > >> > > > >> > > I don't know exactly how prepared is Xalan to receive these changes. > >> > > > >> > > I need help to understand the project's structure. Then I will be > >> > > able to do the work of the 2 next weeks (as provided in the plan): > >> > > define precisely the changes I will do. > >> > > > >> > > Sincerely, > >> > > Samuel > >> > > > >> > > [1] http://docs.oracle.com/javase/6/docs/technotes/guides/xml/jaxp/ > >> > > ReleaseNotes_160.html > >> > > >> > >> > --------------------------------------------------------------------- > >> > 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] > >> > >> > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: [email protected] > > For additional commands, e-mail: [email protected] Michael Glavassevich XML Technologies and WAS Development IBM Toronto Lab E-mail: [email protected] E-mail: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
