From 1698231d4b19934d12ee6326ffe3413f2ac9d6b3 Mon Sep 17 00:00:00 2001
From: Anindita <reachanip@gmail.com>
Date: Thu, 14 Dec 2023 01:55:52 -0800
Subject: [PATCH] added AuthorNotFoundException

---
 .../com/swiz/bcs/controller/GlobalControllerAdvice.java   | 5 +++++
 .../com/swiz/bcs/exception/AuthorNotFoundException.java   | 8 ++++++++
 src/main/java/com/swiz/bcs/service/AuthorService.java     | 4 +++-
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/com/swiz/bcs/exception/AuthorNotFoundException.java

diff --git a/src/main/java/com/swiz/bcs/controller/GlobalControllerAdvice.java b/src/main/java/com/swiz/bcs/controller/GlobalControllerAdvice.java
index c9fa799..36db7d0 100644
--- a/src/main/java/com/swiz/bcs/controller/GlobalControllerAdvice.java
+++ b/src/main/java/com/swiz/bcs/controller/GlobalControllerAdvice.java
@@ -1,5 +1,6 @@
 package com.swiz.bcs.controller;
 
+import com.swiz.bcs.exception.AuthorNotFoundException;
 import com.swiz.bcs.exception.BookNotFoundException;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
@@ -13,5 +14,9 @@ public class GlobalControllerAdvice {
     public ResponseEntity<String> handleBookNotFoundException(BookNotFoundException e){
         return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
     }
+    @ExceptionHandler(AuthorNotFoundException.class)
+    public ResponseEntity<String> handleAuthorNotFoundException(AuthorNotFoundException e){
+        return new ResponseEntity<>(e.getMessage(), HttpStatus.NOT_FOUND);
+    }
 
 }
diff --git a/src/main/java/com/swiz/bcs/exception/AuthorNotFoundException.java b/src/main/java/com/swiz/bcs/exception/AuthorNotFoundException.java
new file mode 100644
index 0000000..41a2bcb
--- /dev/null
+++ b/src/main/java/com/swiz/bcs/exception/AuthorNotFoundException.java
@@ -0,0 +1,8 @@
+package com.swiz.bcs.exception;
+
+public class AuthorNotFoundException extends RuntimeException{
+        public AuthorNotFoundException(String message){
+            super(message);
+        }
+    }
+
diff --git a/src/main/java/com/swiz/bcs/service/AuthorService.java b/src/main/java/com/swiz/bcs/service/AuthorService.java
index 59966dd..f73564c 100644
--- a/src/main/java/com/swiz/bcs/service/AuthorService.java
+++ b/src/main/java/com/swiz/bcs/service/AuthorService.java
@@ -3,6 +3,7 @@
 
 import com.swiz.bcs.dto.AuthorDTO;
 import com.swiz.bcs.entity.Author;
+import com.swiz.bcs.exception.AuthorNotFoundException;
 import com.swiz.bcs.repository.AuthorRepository;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@@ -28,7 +29,8 @@ public List<Author> findAllAuthors() {
     }
 
     public Author findAuthorById(Long id) {
-        return authorRepository.findById(id).orElse(null);
+        return authorRepository.findById(id)
+                .orElseThrow(() -> new AuthorNotFoundException("Author not found with ID: "+id));
     }
 
     // Other author-related operations