For a given custom-formatter, parse refuses certain month values.
(require '[clj-time.core :as t]
'[clj-time.format :as f])
(let [custom-formatter (f/formatter "dd MMM yyyy")]
(f/parse custom-formatter "27 mar 2010")
(f/parse custom-formatter "27 dec 2010"))
The first parsereturns the expected result, #object[org.joda.time.DateTime 0x62a9d176 "2010-03-27T00:00:00.000Z"], while the second returns Actual: java.lang.IllegalArgumentException: Invalid format: "27 dec 2010" is malformed at "dec 2010".
I can't make sense of this behavior. What can possibly causes this issue?
Thanks for help.
update
Here's my project.cljfile
:dependencies [[org.clojure/clojure "1.7.0"]
[twitter-api "0.7.8"]
[cheshire "5.6.1"]
[clojure-csv/clojure-csv "2.0.1"]
[org.postgresql/postgresql "9.4-1206-jdbc42"]
[com.jolbox/bonecp "0.8.0.RELEASE"]
[org.clojure/java.jdbc "0.6.1"]
[java-jdbc/dsl "0.1.0"]
[org.slf4j/slf4j-nop "1.7.21"]
[clj-time "0.11.0"]
]
You likely need to specify a Locale for your formatter. You can check to see your default Locale with:
user=> (java.util.Locale/getDefault)
#object[java.util.Locale 0x4713d9a5 "en_US"]
See the results for different locales (including the error you are seeing):
user=> (require '[clj-time.core :as t]
#_=> '[clj-time.format :as f])
nil
user=> (let [custom-formatter (f/with-locale
(f/formatter "dd MMM yyyy")
java.util.Locale/ENGLISH)]
(f/parse custom-formatter "27 mar 2010"))
#object[org.joda.time.DateTime 0x3cfceae6 "2010-03-27T00:00:00.000Z"]
user=> (let [custom-formatter (f/with-locale
(f/formatter "dd MMM yyyy")
java.util.Locale/ITALY)]
(f/parse custom-formatter "27 mar 2010"))
#object[org.joda.time.DateTime 0x4f5e9955 "2010-03-27T00:00:00.000Z"]
user=> (let [custom-formatter (f/with-locale
(f/formatter "dd MMM yyyy")
java.util.Locale/CHINA)]
(f/parse custom-formatter "27 mar 2010"))
IllegalArgumentException Invalid format: "27 mar 2010" is malformed at "mar 2010" org.joda.time.format.DateTimeFormatter.parseDateTime (DateTimeFormatter.java:899)