Create feedback response question comment db and logic layer

src/main/java/teammates/sqllogic/core/FeedbackResponseCommentsLogic.java

@@ -0,0 +1,42 @@
+package teammates.sqllogic.core;
+
+import java.util.UUID;
+
+import teammates.storage.sqlapi.FeedbackResponseCommentsDb;
+import teammates.storage.sqlentity.FeedbackResponseComment;
+
+/**
+ * Handles operations related to feedback response comments.
+ *
+ * @see FeedbackResponseComment
+ * @see FeedbackResponseCommentsDb
+ */
+public final class FeedbackResponseCommentsLogic {
+
+    private static final FeedbackResponseCommentsLogic instance = new FeedbackResponseCommentsLogic();
+    private FeedbackResponseCommentsDb frcDb;
+
+    private FeedbackResponseCommentsLogic() {
+        // prevent initialization
+    }
+
+    public static FeedbackResponseCommentsLogic inst() {
+        return instance;
+    }
+
+    /**
+     * Initialize dependencies for {@code FeedbackResponseCommentsLogic}.
+     */
+    void initLogicDependencies(FeedbackResponseCommentsDb frcDb) {
+        this.frcDb = frcDb;
+    }
+
+    /**
+     * Gets an feedback response comment by feedback response comment id.
+     * @param id of feedback response comment.
+     * @return the specified feedback response comment.
+     */
+    public FeedbackResponseComment getFeedbackQuestion(UUID id) {
+        return frcDb.getFeedbackResponseComment(id);
+    }
+}

src/main/java/teammates/storage/sqlapi/FeedbackResponseCommentsDb.java

@@ -0,0 +1,67 @@
+package teammates.storage.sqlapi;
+
+import static teammates.common.util.Const.ERROR_CREATE_ENTITY_ALREADY_EXISTS;
+
+import java.util.UUID;
+
+import teammates.common.exception.EntityAlreadyExistsException;
+import teammates.common.exception.InvalidParametersException;
+import teammates.common.util.HibernateUtil;
+import teammates.storage.sqlentity.FeedbackResponseComment;
+
+/**
+ * Handles CRUD operations for feedbackResponseComments.
+ *
+ * @see FeedbackResponseComment
+ */
+public final class FeedbackResponseCommentsDb extends EntitiesDb<FeedbackResponseComment> {
+
+    private static final FeedbackResponseCommentsDb instance = new FeedbackResponseCommentsDb();
+
+    private FeedbackResponseCommentsDb() {
+        // prevent initialization
+    }
+
+    public static FeedbackResponseCommentsDb inst() {
+        return instance;
+    }
+
+    /**
+     * Gets a feedbackResponseComment or null if it does not exist.
+     */
+    public FeedbackResponseComment getFeedbackResponseComment(UUID frId) {
+        assert frId != null;
+
+        return HibernateUtil.get(FeedbackResponseComment.class, frId);
+    }
+
+    /**
+     * Creates a feedbackResponseComment.
+     */
+    public FeedbackResponseComment createFeedbackResponseComment(FeedbackResponseComment feedbackResponseComment)
+            throws InvalidParametersException, EntityAlreadyExistsException {
+        assert feedbackResponseComment != null;
+
+        if (!feedbackResponseComment.isValid()) {
+            throw new InvalidParametersException(feedbackResponseComment.getInvalidityInfo());
+        }
+
+        if (getFeedbackResponseComment(feedbackResponseComment.getId()) != null) {
+            throw new EntityAlreadyExistsException(
+                    String.format(ERROR_CREATE_ENTITY_ALREADY_EXISTS, feedbackResponseComment.toString()));
+        }
+
+        persist(feedbackResponseComment);
+        return feedbackResponseComment;
+    }
+
+    /**
+     * Deletes a feedbackResponseComment.
+     */
+    public void deleteFeedbackResponseComment(FeedbackResponseComment feedbackResponseComment) {
+        if (feedbackResponseComment != null) {
+            delete(feedbackResponseComment);
+        }
+    }
+
+}