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我正試圖實施org.joda.time.ReadableInstant。它從一個通用接口繼承,但顯然這應該不重要。 The interface是:如何用Clojure記錄實現這個通用Java接口?
public interface ReadableInstant extends Comparable<ReadableInstant> {
long getMillis();
Chronology getChronology();
DateTimeZone getZone();
int get(DateTimeFieldType type);
boolean isSupported(DateTimeFieldType field);
Instant toInstant();
boolean isEqual(ReadableInstant instant);
boolean isAfter(ReadableInstant instant);
boolean isBefore(ReadableInstant instant);
boolean equals(Object readableInstant);
int hashCode();
String toString();
}
我的記錄:
(defrecord WeirdDate [year month day]
ReadableInstant
(^boolean equals [this ^Object readableInstant] (.equals (as-date this) readableInstant))
(^int get [this ^DateTimeFieldType type] (get (as-date this) type))
(^Chronology getChronology [this] (.getChronology (as-date this)))
(^long getMillis [this] (.getMillis (as-date this)))
(^DateTimeZone getZone [this] (.getZone (as-date this)))
(^int hashCode [this] (.hashCode (as-date this)))
(^boolean isAfter [this ^ReadableInstant instant] (.isAfter (as-date this) instant))
(^boolean isBefore [this ^ReadableInstant instant] (.isBefore (as-date this) instant))
(^boolean isEqual [this ^ReadableInstant instant] (.isEqual (as-date this) instant))
(^boolean isSupported [this ^DateTimeFieldType field] (.isSupported (as-date this) field))
(^Instant.toInstant [this] (.toInstant (as-date this)))
(^String toString [this] (.toString (as-date this))))
但我得到的錯誤:
java.lang.IllegalArgumentException: Must hint overloaded method: get
是我喜歡的類型提示錯誤?還有什麼不對嗎?
(道歉對於那些你在Clojure mailing list where I've already asked a longer version of this question,我認爲這裏更短的問題可能是比較容易回答)
重新鍵入註釋,我很懷疑,只是這條消息似乎在說'添加更多註釋!'。 – Joe 2014-09-11 10:27:13
非常感謝您的回答,就是這樣。我遇到了另一個問題,也許你可以花一分鐘時間? http://stackoverflow.com/questions/25786493/classnotfound-error-trying-to-implement-clojure-protocol-with-a-deftype – Joe 2014-09-11 11:40:57