Extract set_err_msg_and_throw_exception to utils.rs

bindings/java/rs_src/utils.rs

@@ -1,5 +1,5 @@
 use crate::errors::LimboError;
-use jni::objects::JByteArray;
+use jni::objects::{JByteArray, JObject};
 use jni::JNIEnv;
 
 pub(crate) fn utf8_byte_arr_to_str(
@@ -14,3 +14,42 @@ pub(crate) fn utf8_byte_arr_to_str(
     })?;
     Ok(str)
 }
+
+/// Sets the error message and throws a Java exception.
+///
+/// This function converts the provided error message to a byte array and calls the
+/// `throwLimboException` method on the provided Java object to throw an exception.
+///
+/// # Parameters
+/// - `env`: The JNI environment.
+/// - `obj`: The Java object on which the exception will be thrown.
+/// - `err_code`: The error code corresponding to the exception. Refer to `org.github.tursodatabase.core.Codes` for the list of error codes.
+/// - `err_msg`: The error message to be included in the exception.
+///
+/// # Example
+/// ```rust
+/// set_err_msg_and_throw_exception(env, obj, Codes::SQLITE_ERROR, "An error occurred".to_string());
+/// ```
+pub fn set_err_msg_and_throw_exception<'local>(
+    env: &mut JNIEnv<'local>,
+    obj: JObject<'local>,
+    err_code: i32,
+    err_msg: String,
+) {
+    let error_message_bytes = env
+        .byte_array_from_slice(err_msg.as_bytes())
+        .expect("Failed to convert to byte array");
+    match env.call_method(
+        obj,
+        "throwLimboException",
+        "(I[B)V",
+        &[err_code.into(), (&error_message_bytes).into()],
+    ) {
+        Ok(_) => {
+            // do nothing because above method will always return Err
+        }
+        Err(_e) => {
+            // do nothing because our java app will handle Err
+        }
+    }
+}