OT Digester question
Appologies for the off topic question. Does anyone know how I can create an object with a constructor that takes agruments specified via XML elements. I have a Configuration object with a constructor that takes two String parameters. The XML will be something like this: config param1someText/param1 param2someText/param2 saveAssomeText/savaAs /config When the digester matches the config pattern it will create the Configuration object passing param1 and param2 as parameters to the constructor and then when it matches the pattern config/saveAs it will call a method on the Configuration object. I have looked at the documentation and have seen the FactoryCreateRule but I am not sure how to use this and how I can get it to use the param1 and param2 elements as the Constructor parameters. Once again sorry for the off topic post. Any hints would be appreciated. Thanks Jim. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Digester question
A bit out of my comfort zone on this one, but I think you might have to change your XML to something like: config attr1=someText attr2=someText saveAssomeText/savaAs /config because the FactoryCreateRule/ObjectCreationFactory stuff seems to work with an element's attributes, not its sub-elements. Then it looks like you need to subclass AbstractObjectCreationFactory and provode a createObject method impl that will extract the appropriate attribute values and construct your Configuration object. I'm sure other folks on the list (or on commons-user) have more experience with this though... Quoting Jim Collins [EMAIL PROTECTED]: Appologies for the off topic question. Does anyone know how I can create an object with a constructor that takes agruments specified via XML elements. I have a Configuration object with a constructor that takes two String parameters. The XML will be something like this: config param1someText/param1 param2someText/param2 saveAssomeText/savaAs /config When the digester matches the config pattern it will create the Configuration object passing param1 and param2 as parameters to the constructor and then when it matches the pattern config/saveAs it will call a method on the Configuration object. I have looked at the documentation and have seen the FactoryCreateRule but I am not sure how to use this and how I can get it to use the param1 and param2 elements as the Constructor parameters. Once again sorry for the off topic post. Any hints would be appreciated. Thanks Jim. -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Digester question
Kris, Thanks for the help. Jim. - Original Message - From: Kris Schneider [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, August 04, 2003 8:46 PM Subject: Re: [OT] Digester question A bit out of my comfort zone on this one, but I think you might have to change your XML to something like: config attr1=someText attr2=someText saveAssomeText/savaAs /config because the FactoryCreateRule/ObjectCreationFactory stuff seems to work with an element's attributes, not its sub-elements. Then it looks like you need to subclass AbstractObjectCreationFactory and provode a createObject method impl that will extract the appropriate attribute values and construct your Configuration object. I'm sure other folks on the list (or on commons-user) have more experience with this though... Quoting Jim Collins [EMAIL PROTECTED]: Appologies for the off topic question. Does anyone know how I can create an object with a constructor that takes agruments specified via XML elements. I have a Configuration object with a constructor that takes two String parameters. The XML will be something like this: config param1someText/param1 param2someText/param2 saveAssomeText/savaAs /config When the digester matches the config pattern it will create the Configuration object passing param1 and param2 as parameters to the constructor and then when it matches the pattern config/saveAs it will call a method on the Configuration object. I have looked at the documentation and have seen the FactoryCreateRule but I am not sure how to use this and how I can get it to use the param1 and param2 elements as the Constructor parameters. Once again sorry for the off topic post. Any hints would be appreciated. Thanks Jim. -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ - 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]
Re: [OT] Digester question
Um, so, that actually worked? ;-) Quoting Jim Collins [EMAIL PROTECTED]: Kris, Thanks for the help. Jim. - Original Message - From: Kris Schneider [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, August 04, 2003 8:46 PM Subject: Re: [OT] Digester question A bit out of my comfort zone on this one, but I think you might have to change your XML to something like: config attr1=someText attr2=someText saveAssomeText/savaAs /config because the FactoryCreateRule/ObjectCreationFactory stuff seems to work with an element's attributes, not its sub-elements. Then it looks like you need to subclass AbstractObjectCreationFactory and provode a createObject method impl that will extract the appropriate attribute values and construct your Configuration object. I'm sure other folks on the list (or on commons-user) have more experience with this though... Quoting Jim Collins [EMAIL PROTECTED]: Appologies for the off topic question. Does anyone know how I can create an object with a constructor that takes agruments specified via XML elements. I have a Configuration object with a constructor that takes two String parameters. The XML will be something like this: config param1someText/param1 param2someText/param2 saveAssomeText/savaAs /config When the digester matches the config pattern it will create the Configuration object passing param1 and param2 as parameters to the constructor and then when it matches the pattern config/saveAs it will call a method on the Configuration object. I have looked at the documentation and have seen the FactoryCreateRule but I am not sure how to use this and how I can get it to use the param1 and param2 elements as the Constructor parameters. Once again sorry for the off topic post. Any hints would be appreciated. Thanks Jim. -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] Digester question
I haven't got it to work yet but you confirmed what I thought about not being able to use nested tags and having to use attributes instead. I am just checking out now how to use the FactoryCreateRule. Jim. - Original Message - From: Kris Schneider [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, August 04, 2003 9:06 PM Subject: Re: [OT] Digester question Um, so, that actually worked? ;-) Quoting Jim Collins [EMAIL PROTECTED]: Kris, Thanks for the help. Jim. - Original Message - From: Kris Schneider [EMAIL PROTECTED] To: Struts Users Mailing List [EMAIL PROTECTED] Sent: Monday, August 04, 2003 8:46 PM Subject: Re: [OT] Digester question A bit out of my comfort zone on this one, but I think you might have to change your XML to something like: config attr1=someText attr2=someText saveAssomeText/savaAs /config because the FactoryCreateRule/ObjectCreationFactory stuff seems to work with an element's attributes, not its sub-elements. Then it looks like you need to subclass AbstractObjectCreationFactory and provode a createObject method impl that will extract the appropriate attribute values and construct your Configuration object. I'm sure other folks on the list (or on commons-user) have more experience with this though... Quoting Jim Collins [EMAIL PROTECTED]: Appologies for the off topic question. Does anyone know how I can create an object with a constructor that takes agruments specified via XML elements. I have a Configuration object with a constructor that takes two String parameters. The XML will be something like this: config param1someText/param1 param2someText/param2 saveAssomeText/savaAs /config When the digester matches the config pattern it will create the Configuration object passing param1 and param2 as parameters to the constructor and then when it matches the pattern config/saveAs it will call a method on the Configuration object. I have looked at the documentation and have seen the FactoryCreateRule but I am not sure how to use this and how I can get it to use the param1 and param2 elements as the Constructor parameters. Once again sorry for the off topic post. Any hints would be appreciated. Thanks Jim. -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ -- Kris Schneider mailto:[EMAIL PROTECTED] D.O.Tech http://www.dotech.com/ - 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]
Struts Digester question...
Subject: Struts Digester question...
From: Scott Curtis [EMAIL PROTECTED]
===
Hi,
When I start my server and Struts loads I am seeing the following line in
the console:
register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN',
'classloader:/org/apache/struts/resources/struts-config_1_0.dtd'
I am not 100% sure what this is doing which is the first problem. I guess it
is somehow adding the DTD to the classpath so that it is accessible from
within xml files using the dtd name (struts-config_1_0.dtd) rather than a
full path/URL to the dtd file.
I would like to add my own DTD in a similar way so that xml files that I
pass into the system can access it by it's name and not require a full path
to the dtd file. If the above line of code doesn't do what I have suggested
is there a way to add a DTD in the manner I have suggested so that the xml
files to be validated against it can reference it by it's name only and not
the full URL/path?
Hope that makes some sense to someone out there! :-)
Thanks
- scott
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Re: Struts Digester question...
On Mon, 10 Jun 2002, Struts Newsgroup wrote:
Date: Mon, 10 Jun 2002 01:10:02 -0700
From: Struts Newsgroup [EMAIL PROTECTED]
Reply-To: Struts Users Mailing List [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Subject: Struts Digester question...
Subject: Struts Digester question...
From: Scott Curtis [EMAIL PROTECTED]
===
Hi,
When I start my server and Struts loads I am seeing the following line in
the console:
register('-//Apache Software Foundation//DTD Struts Configuration 1.0//EN',
'classloader:/org/apache/struts/resources/struts-config_1_0.dtd'
I am not 100% sure what this is doing which is the first problem. I guess it
is somehow adding the DTD to the classpath so that it is accessible from
within xml files using the dtd name (struts-config_1_0.dtd) rather than a
full path/URL to the dtd file.
I would like to add my own DTD in a similar way so that xml files that I
pass into the system can access it by it's name and not require a full path
to the dtd file. If the above line of code doesn't do what I have suggested
is there a way to add a DTD in the manner I have suggested so that the xml
files to be validated against it can reference it by it's name only and not
the full URL/path?
Hope that makes some sense to someone out there! :-)
If you look inside Digester, you will find that that it uses a SAX parser,
via the JAXP APIs. SAX lets you register an EntityHandler object that
is called during the parse when a !DOCTYPE is encountered. As you might
surmize, the registration noted by the log message is telling Digester
whenever you see the public identifier of the Struts configuration file
DTD, use this copy instead of going out to the Internet.
The important issue, though, is where the second URL came from -- if the
resource is inside your webapp, you *must* ask your servlet container for
the URL of the requested resource. There are two basic options:
(1) Resource file somewhere within your webapp (i.e. /WEB-INF/mydtd.dtd)
Digester digester = ...;
digester.register(... public id for my DTD ...,
context.getResource(/WEB-INF/mydtd.dtd).toString());
(2) Resource file somewhere in the class path (this is what Struts
does ... the DTD it is loading is in the org/apache/struts/resources
package in struts.jar):
Digester digester = ...;
URL url = this.getClass().getResource(/path/to/mydtd.dtd);
digester.register(... public id for my DTD ...,
url.toString());
As long as your XML documents have a DOCTYPE with a public identifier that
matches the first argument to the register() method, then the XML parser
will use the URL passed as the second argument to retrieve the DTD,
instead of paying attention to any system identifier in the DOCTYPE.
Thanks
- scott
Craig
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Re: Digester Question
Anyone? /tataryn:craig From: Craig Tataryn [EMAIL PROTECTED] Reply-To: Struts Users Mailing List [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Digester Question Date: Mon, 04 Mar 2002 14:19:07 -0600 I realize that the digester is now part of commons, but I figure there is probably a lot of expertise here since it grew up in Struts. I was wondering if someone could help me figure out the easiest way to do this: I have an xml document, that holds form data, I would like to use the digester to populate my objects automatically. A form file might look like this: forms form type=shopping-cart /form form type=calculator ... /form ... /forms Let's assume there are many forms... I was wondering, without having to load all forms into objects and then picking the one I want to use, I would rather the digester only instantiate and populate an object for lets say, the form node who's type attribute is calculator. What's the easiest way to do this? I don't think the digester can pattern match on attribute values the way XPath does, so is there a programming technique I can use to filter further? Thanks, Craig. Craig W. Tataryn Programmer/Analyst Compuware _ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED] Craig W. Tataryn Programmer/Analyst Compuware _ Send and receive Hotmail on your mobile device: http://mobile.msn.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: Digester Question
On Mon, 4 Mar 2002, Craig Tataryn wrote: I realize that the digester is now part of commons, but I figure there is probably a lot of expertise here since it grew up in Struts. I was wondering if someone could help me figure out the easiest way to do this: I have an xml document, that holds form data, I would like to use the digester to populate my objects automatically. A form file might look like this: forms form type=shopping-cart /form form type=calculator ... /form ... /forms Let's assume there are many forms... I was wondering, without having to load all forms into objects and then picking the one I want to use, I would rather the digester only instantiate and populate an object for lets say, the form node who's type attribute is calculator. What's the easiest way to do this? I don't think the digester can pattern match on attribute values the way XPath does, so is there a programming technique I can use to filter further? Hi Craig. Since, AFAIK, the digester blindly instantiates all of the implied objects in your database file, I think that you'll need to parse the database file independently. You might try parsing the database file using JDOM, extracting the elements that you want and passing that snippet to the digester. I think that utilizing JDOM, you'll get working code much faster than you would with raw SAX parsing. I have used JDOM but I haven't tried utilizing it with the digester - just an idea. -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Digester Question
I realize that the digester is now part of commons, but I figure there is probably a lot of expertise here since it grew up in Struts. I was wondering if someone could help me figure out the easiest way to do this: I have an xml document, that holds form data, I would like to use the digester to populate my objects automatically. A form file might look like this: forms form type=shopping-cart /form form type=calculator ... /form ... /forms Let's assume there are many forms... I was wondering, without having to load all forms into objects and then picking the one I want to use, I would rather the digester only instantiate and populate an object for lets say, the form node who's type attribute is calculator. What's the easiest way to do this? I don't think the digester can pattern match on attribute values the way XPath does, so is there a programming technique I can use to filter further? Thanks, Craig. Craig W. Tataryn Programmer/Analyst Compuware _ Chat with friends online, try MSN Messenger: http://messenger.msn.com -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
Re: digester question
"Gogineni, Pratima" wrote: Hi, I have been reading the documentation on digester - I was wondering if it uses XPATH for element pattern matching and if it doesnt why not? I dont think the documentation mentions this ... That's *usually* a pretty good sign that it doesn't support the feature you are looking for :-). Currently, Digester uses a very simple pattern matching algorithm based on the set of nested elements you are currently processing. This seemed more appropriate to the types of problems that Digester was created to solve (like reading configuration files, or building arbitrary object trees). However, XPATH is something that might be interesting to consider for the future. We're also going to look at XPATH as a way for the Struts custom tags to access bean properties or navigate DOM objects in the presentation layer. THanks Pratima Craig
