Re: [Simple-support] Getting location context in validate(), commit() methods

[Niall G. <gal...@ya...>]

Hi,

Yes, you can. You need to look at Strategy interface. There is an implementation org.simpleframework.xml.load.DefaultStrategy which provides a good template. In this method you can add the NodeMap object to the Map provided. For example

public Type getElement(Class field, NodeMap node, Map map) {
   map.put("node", node);
   return defaultStrategy.getElement(field, node, map);
}

Once you have done this the session map for serialization contains the node. So you can implement your commit and validate like so.

@Commit
private void doCommit(Map map) throws Exception {
   NodeMap node = map.get("node");
   InputNode element = (InputNode)node.getParent();
   Position line = element.getPosition();
   int lineNumber = line.getLine();
   
   // do whatever with the line number
}

The next release will contain a more straight forward Strategy which will allow you to do this kind of thing a little easier. There is a TestCase which provides more information on how to use the Strategy.

http://simple.svn.sourceforge.net/viewvc/simple/trunk/download/stream/src/test/java/org/simpleframework/xml/load/StrategyTest.java

Hope this helps,
Niall





--- On Fri, 7/25/08, Johannes Plass <joh...@we...> wrote:

> From: Johannes Plass <joh...@we...>
> Subject: [Simple-support] Getting location context in validate(), commit() methods
> To: sim...@li...
> Date: Friday, July 25, 2008, 3:44 AM
> Hi there,
> 
> is there a way to get a location context (line
> number/column number
> in XML file) inside an objects validate(), commit(),
> etc.methods
> (those tagged with @Validate, @Commit) ?
> The location of the object's element start would
> already suffice
> as a context for error reporting.
> 
> Just in case there is no way to do it in the present
> version - is there
> some interest to provide this feature in a future version
> (I could
> prepare a first draft patch if volunteers are needed :-) ?
> 
> Best regards and many thanks for this simply great tool
> 
> Johannes
> 
> 
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