Does clojure-xml/parse return a lazy sequence?

Question

clojure-xml/parse returns a map of an xml file.

(ns xml-lib.core
  ^{:author "Charles M. Norton",
    :doc "xml-lib is an xml parsing library built on clojure-xml.
        Created on June 26, 2012"} 
  (:require [clojure.string :as cstr])
  (:require [util.core :as utl])
  (:require [clojure.xml :as cjxml]))

(defn ret-xml-data
    "Returns a map of the supplied xml file."
    [xml-fnam]

    (let [test-file-nam (utl/open xml-fnam)]
    (cjxml/parse xml-fnam))

Is the returned map lazy, or should I pass the parse call into a lazy sequence function?

Thanks.

(ret-xml-data "test.xml")

returns (result truncated).

{:tag :TamperExport, :attrs {:xmlns "http://

If you want to parse XML with Clojure lazily, I'd recommend clojure.data.xml, which is the successor to what used to be in clojure-xml from clojure-contrib. — David J.
– David J., Commented Apr 30, 2013 at 17:55

Arthur Ulfeldt · Accepted Answer · 2013-04-30 18:34:10Z

3

the short anser is no, clojure-xml likely won't do what you want.

data.xml is the lazy sucessor to clojure-xml

https://github.com/clojure/data.xml

edited Apr 30, 2013 at 18:34

answered Jun 26, 2012 at 20:29

Arthur Ulfeldt

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2 Comments

octopusgrabbus Over a year ago

Thanks. I'll go look at that tomorrow.

David J. Over a year ago

This is useful, but it is a comment, not an answer to the question (which is "no", by the way). It could be rephrased to be an answer (nudge, nudge).

BillRobertson42 · Accepted Answer · 2012-06-26 19:16:32Z

1

It uses a SAX Parser under the hood, which will consume the entire xml document, so I assume that it will create the fully realized data structure.

answered Jun 26, 2012 at 19:16

BillRobertson42

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3 Comments

octopusgrabbus Over a year ago

Which means I should make it lazy? I'm assuming that because you used the phrase "fully realized". Thanks.

BillRobertson42 Over a year ago

I mean that it is a complete data structure, so it's already there - in memory; all of it.

Alex Over a year ago

SAX parser doesn't necessarily mean it creates a fully realized data structure, though in this case that's correct. The old contrib.lazy-xml started the parser in a new thread which put elements into a queue, and returned a seq that pulled elements off the queue.

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