nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Child Item

XPath or Java for filtering - what is faster?

IamtheWalrus

I have an XML file that I am parsing using XPath. In the document, there is a list of elements. My existing code parses the xml into Java objects and processes them.

My new requirement is to not take all elements in the list - if the ID of the element is A or B, ignore it, but I want to keep C, D and E.

My question is, what is fastest:
1. Parse and save the entire list into Java objects, then filter out A and B
2. Use XPath to exclude A and B.

Find more posts tagged with

Quick Links

Comments

L.Jenkins

Would it not be easier to keep your code as is and manipulate the XPath file as needed, should the XML file change?

IamtheWalrus

Itzy wrote: »

Would it not be easier to keep your code as is and manipulate the XPath file as needed, should the XML file change?

So filter out using Xpath? Like such?

L.Jenkins

I'm no expert, but I'm wondering is it easier that way.

CreepingDeath

IamtheWalrus wrote: »

My question is, what is fastest:
1. Parse and save the entire list into Java objects, then filter out A and B
2. Use XPath to exclude A and B.

There's also an option 3, to use XSLT stylesheets to transform the original XML into one specific for your code, performing any business filtering of elements in the stylesheet. Especially if you are not in control of the structure of the XML, eg. it's from a client/third party.

IamtheWalrus

CreepingDeath wrote: »

There's also an option 3, to use XSLT stylesheets to transform the original XML into one specific for your code, performing any business filtering of elements in the stylesheet. Especially if you are not in control of the structure of the XML, eg. it's from a client/third party.

I can't use anything other than XPath and Java. The existing code uses those to parse the existing XML. My job is to filter out one part of it. I will not be re-writing the existing code.

L.Jenkins

IamtheWalrus wrote: »

I can't use anything other than XPath and Java. The existing code uses those to parse the existing XML. My job is to filter out one part of it. I will not be re-writing the existing code.

Well it seems that your only option is to modify the XML document to ensure nothing in the original source code doesn't break.