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data.clj
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data.clj
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;
; Copyright © 2021 Peter Monks
;
; Licensed under the Apache License, Version 2.0 (the "License");
; you may not use this file except in compliance with the License.
; You may obtain a copy of the License at
;
; http://www.apache.org/licenses/LICENSE-2.0
;
; Unless required by applicable law or agreed to in writing, software
; distributed under the License is distributed on an "AS IS" BASIS,
; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
; See the License for the specific language governing permissions and
; limitations under the License.
;
; SPDX-License-Identifier: Apache-2.0
;
(ns lice-comb.impl.data
"Data handling functionality. Note: this namespace is not part of the public
API of lice-comb and may change without notice."
(:require [clojure.string :as s]
[clojure.java.io :as io]
[clojure.reflect :as cr]
[clojure.edn :as edn]))
(defn load-string-resource
"Loads the given classpath resources from the classpath, returning it as a
String. Throws ex-info on error.
Notes:
* Classpath resource paths must not start with a forward slash ('/').
* The JVM does not support hyphens ('-') in classpath resource path elements.
Use underscore ('_') instead.
* Unlike during class loading, Clojure does not automatically switch hyphens
in classpath resource path elements to underscores. This inconsistency can
be a time-wasting trap."
[path]
(when-not (s/blank? path)
(try
(if-let [resource (io/resource path)]
(slurp resource)
(throw (ex-info (str "No resource found in classpath at " path) {})))
(catch clojure.lang.ExceptionInfo ie
(throw ie))
(catch Exception e
(throw (ex-info (str "Unexpected " (cr/typename (type e)) " while reading " path) {} e))))))
(defn load-edn-resource
"Loads and parses the given EDN file from the classpath."
[path]
(when-let [edn-string (load-string-resource path)]
(edn/read-string edn-string)))