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Implementing XSLT-like transformation in bare Clojure: https://shapiy.github.io/blog/clojure-xslt/
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(ns io.shapiy.core | |
(:gen-class) | |
(:require [clojure.data.xml :refer :all]) | |
(:import (clojure.data.xml Element))) | |
(def html "<!DOCTYPE html> | |
<html> | |
<body> | |
<h1>Programming languages</h1> | |
<p>There are many, for example:</p> | |
<ol> | |
<li>Clojure (<a href=\"http://clojure.org\">official site</a>)</li> | |
<li>XSLT (<a href=\"http://www.w3.org/Style/XSL/\">W3C page</a>)</li> | |
</ol> | |
</body> | |
</html>") | |
(declare apply-templates) | |
(declare copy) | |
(defn map-identity [node] (copy node apply-templates)) | |
(defn apply-templates [node-or-nodes] | |
(if (seq? node-or-nodes) | |
(map map-identity node-or-nodes) | |
(map-identity node-or-nodes))) | |
(defn copy [node f] | |
(cond | |
;; Element? | |
(.isInstance Element node) [(:tag node) | |
(f (:attrs node)) | |
(f (:content node))] | |
;; Attribute map? | |
(map? node) node | |
;; Text node? | |
(string? node) node)) | |
(defn transform [] | |
(-> (parse-str html) | |
apply-templates | |
sexp-as-element | |
indent-str)) | |
(defn -main [] (println (transform))) |
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