Hello. I tried to write small utility for importing java code. Because
sometimes I want to just copy and paste very long java import code and
hope it work in clojure rather than converting it to clojure style.
Functions and macros work as I expected. But if I try to apply '-
>:import' in ns statement:
;;slime
(use 'easy-import)
(ns test
(->:import "import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient"))
-----------------
java.lang.Exception: No such var: clojure/->:import (NO_SOURCE_FILE:1)
[Thrown class clojure.lang.Compiler$CompilerException]
;;Test
(java-import-code->lst "import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient") => '((org.apache.http
HttpVersion) (org.apache.http.client HttpClient))
(macroexpand-1 '(->:import "import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient"))
=> (:import (org.apache.http HttpVersion) (org.apache.http.client
HttpClient))
(macroexpand-1 '(->import "import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient"))
=> (import '(org.apache.http HttpVersion) '(org.apache.http.client
HttpClient))
How can I fix this? I paste my code.
;;code
(ns easy-import
(:use clojure.contrib.str-utils))
(defn java-import-code->lst
{:doc "converts java import code to a list for clojure import
code. For example (java-import-code->lst \"import
org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient\") => '((org.apache.http
HttpVersion) (org.apache.http.client HttpClient))"}
[#^String code]
(let [parsed-code (map re-split (repeat #"\.")
(re-split #";" (re-gsub #"\n+|\s+|import" "" code)))
packages (map str-join "." (map drop-last parsed-code))
classes (map last parsed-code)]
(for [p packages c classes]
(list (symbol p) (symbol c)))))
(defmacro ->:import
{:doc "(->:import \"import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient\") expands to (:import
(org.apache.http HttpVersion) (org.apache.http.client HttpClient))"}
[#^String code]
`(:import ~@(java-import-code->lst code)))
(defn map-quote
{:doc "(map-quote '((a b) (c d))) => '((quote (a b)) (quote (c
d)))"}
[lst]
(for [item lst]
(list 'quote item)))
(defmacro ->import
{:doc "(->import \"import org.apache.http.HttpVersion; import
org.apache.http.http.client.HttpClient\") expands to (import
'(org.apache.http HttpVersion) '(org.apache.http.client HttpClient))"}
[#^String code]
`(import ~@(map-quote (java-import-code->lst code))))
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