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bonjo · Nov 25 '13, 07:36 AM

Well, I didnt do much, just used System.nanoTime () to measure the difference.
so I did:

Code:

sum = 0;

and repeated 1000 times:

Code:

startTime = System.nanoTime();
**operation**
endTime = System.nanoTime();
sum += (endTime - startTime)/1e9;

and at the end, the average time is

Code:

sum/1000

bonjo · Nov 7 '13, 02:35 PM

Well, I promised to update about time measurements.
so, I tried two approaches:
1. Having an xml with embedded JS.
I construct a dom-tree, locate js scripts and run it.
2. Having an xsl file. using TransformerFact ory to create an output xml of it.

Simulating with 10runs gives the following time (seconds):
JS: 0.03374
XSL: 0.04
Thats already very close.
When going for larger runs, it gets...

bonjo · Oct 30 '13, 09:51 PM

Also, another interesting question, is it possible to debug the ScriptEngine instructions?
Same as you debug a js in browser / attach to process in Script mode with VS?

bonjo · Oct 30 '13, 02:55 PM

Im still investigating my options.
I might prefer the JS engine after all.
but I wonder what is the best way to reconstruct my xml file to a data structure that JS Engine will work easily with.
What is it that you say about json? can you explain a bit further that point?

bonjo · Oct 30 '13, 08:43 AM

I'd gladly try to measure that, but first I need to understand how to accomplish it :-)
Its a bit of a mixup, as I cant really use only JS to iterate over my data.xml and evaluate statements over it.
I will still need, this way or another, to use some kind of xpath, just in javascript.
either that, or I will create some multi dimensional array holding all my xml elements and their attributes,
and evaluate the javascript...

bonjo · Oct 30 '13, 07:05 AM

Yes, That was a mistake.
Using XPath 1.0 seems very problematic.
perhaps I should look at a different direction.
I also need the strength to do if-elseif-elseif-else, and maybe if-if-if statements.
how severe in performance is using the ScriptEngine to evaluate javascript expressions?

bonjo · Oct 29 '13, 01:03 PM

I prefer using xpath engine ( I guess runtime will be much better comparing to js engine) But its not accepting those if statements.
I try the following:
exp = "if (/row/field[@name='service']) then 'Ms.' else 'Mr.'";
res = xPath.compile(e xp).evaluate(xm lDocument);
but then I get javax.xml.trans form.Transforme rException: Could not find function: if

Is it, for sure, exists in java xpath engine?

bonjo · Oct 29 '13, 09:21 AM

So I should, after having a dom-tree, use xpath in java to select all attributes (according to my example, all 'title' attributes), and in those attributes i should write xpath code, and evaluate it on my second (data) dom-tree?
then, replace the attribute's value to the evaluated one?
I can see how I can pull information, but how can I tell in xpath if statements, so that if it found that a certain value is 'X', assign 'Y' to that attribute....

bonjo · Oct 28 '13, 05:15 PM

Well, you're right. Sorry for targeting it from one subforum to the other.
I will continue my journey there.
have a good day

bonjo · Oct 28 '13, 03:59 PM

And how to I "tell" the xsl-to-xml engine to read an xml file and evaluate its attributes, where it indeed contains xsl code? is that possible? (in the form I supplied)

Im doing the entire programming in JAVA, in case there're other approaches.
I started thinking about using handlebars.java as a templating engine, and then simply read the input file as an xml, re-writing it while evaluating its attributes with handlebars....

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