self() 추가

src/main/java/cokr/xit/foundation/AbstractEntity.java

@@ -136,4 +136,13 @@ public abstract class AbstractEntity {
 	public void setUseYN(String useYN) {
 		this.useYN = useYN;
 	}
+
+	/**현재 객체를 반환한다.
+	 * @param <T> AbstractEntity 유형
+	 * @return 현재 객체
+	 */
+	@SuppressWarnings("unchecked")
+	protected <T extends AbstractEntity> T self() {
+		return (T)this;
+	}
 }