Re: [Htmlparser-user] Can't use extractAllNodesThatMatch back-to-back for same Parser instance

[Daniel D. <me...@cr...>]

Was able to fix the problem using this code, pulled from the
extractAllNodesThatMatch method itself:

=========================
NodeIterator e;
	        for (e = parser.elements (); e.hasMoreNodes (); ) {
	        	Node currentNode = e.nextNode();
	        	currentNode.collectInto(titleList, titleFilter);
	        	currentNode.collectInto(summaryTableList, summaryTableFilter);
	        }
===================

-Daniel

On Tue, Mar 11, 2008 at 9:03 AM, Daniel Dixon <me...@cr...> wrote:
> Hello,
>
>  Anyone know why I can't use two extractAllNodesThatMatch(filter)
>  methods back-to-back on the same Parser instance?
>
>  More specifically I have this code:
>
>  ========================================
>  Parser parser = new Parser(google);
>
>  NodeList titleList = parser.extractAllNodesThatMatch(titleFilter);
>  NodeList summaryTableList = parser.extractAllNodesThatMatch(summaryTableFilter);
>  ========================================
>
>  The Google search results page I'm parsing has a series of these:
>
>  <a href="blah">Title</a>
>  <table><tr><td>.....Summary info....</td></tr></table>
>
>  The two filters above, when independent, work fine.  Run them
>  back-to-back and the second will come up empty.  I don't see where the
>  extractAllNodesThatMatch method literally pulls the nodes out of the
>  captured source, thus affecting the second filter. Here are my
>  filters:
>
>  ========================================
>  // filter to pull out titles (all links that are next to a table)
>  NodeFilter titleFilter = new AndFilter (
>                 new NodeClassFilter (LinkTag.class),
>                 new HasSiblingFilter (new NodeClassFilter(TableTag.class))
>  );
>  // filter to pull out summaries (all tables that are next to a title link)
>  NodeFilter summaryTableFilter = new AndFilter (
>                 new NodeClassFilter (TableTag.class),
>                 new NodeClassFilterOnPreviousSibling (LinkTag.class)
>  // custom filter
>  );
>  ========================================
>
>  Thanks for the help.  I've already tried subclassing the Parser so
>  that I could implement the clone() method, but got the same result.
>
>  -Daniel
>



-- 
-------------------------------
Daniel
me...@da...

www.OneDanShow.com
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