feat: implemented exception handling (this time for real)

.gitignore

@@ -44,8 +44,8 @@ bin/
 
 ### Rust ###
 Cargo.lock
-.cargo/*
-target/*
+.cargo
+target
 
 # Do not inclue generated code
 src/main/java/com/codemp/intellij/jni

Cargo.toml

@@ -4,13 +4,18 @@ version = "0.1.0"
 edition = "2021"
 
 [dependencies]
-codemp = { git = "ssh://git@github.com-irl/codewithotherpeopleandchangenamelater/codemp.git", tag = "v0.4.2" }
-jni = "0.21.1"
-rifgen = "0.1.61"
+codemp = { git = "ssh://git@github.com-irl/codewithotherpeopleandchangenamelater/codemp.git", tag = "v0.4.4", features = ["global"] }
+jni = { version = "0.21.1", features = ["invocation"] }
+rifgen = { path = "/home/zaaarf/dev/irl/rust/jni/rifgen" }
+#rifgen = { git = "https://github.com/Kofituo/rifgen.git", rev = "d27d9785b2febcf5527f1deb6a846be5d583f7d7"}
+#rifgen = "0.1.7"
 
 [build-dependencies]
 flapigen = "0.6.0"
-rifgen = "0.1.61"
+rifgen = { path = "/home/zaaarf/dev/irl/rust/jni/rifgen" }
+#rifgen = "0.1.7"
+#rifgen = { git = "https://github.com/Kofituo/rifgen.git", rev = "d27d9785b2febcf5527f1deb6a846be5d583f7d7"}
+
 
 [lib]
 crate_type = ["cdylib"]

build.rs

@@ -1,15 +1,20 @@
 use flapigen::{JavaConfig, LanguageConfig};
 use std::{env, path::Path};
-use rifgen::{Generator, TypeCases, Language};
+use rifgen::{Generator as RifgenGenerator, TypeCases, Language};
+use flapigen::Generator as FlapigenGenerator;
 
 fn main() {
 	let out_dir_var = env::var("OUT_DIR")
 		.expect("no OUT_DIR, but cargo should provide it");
 	let out_dir = Path::new(&out_dir_var);
-    let source_folder = "src/main/rust/";
+
+	let mut source_folders = Vec::new();
+	source_folders.push(Path::new("src/main/rust/"));
 
 	let glue_file = out_dir.join("glue.in");
-    Generator::new(TypeCases::CamelCase,Language::Java,source_folder)
+	RifgenGenerator::new(TypeCases::CamelCase,
+	                     Language::Java,
+	                     source_folders)
 		.generate_interface(&glue_file);
 
 	let jni_path = Path::new("src")
@@ -24,7 +29,7 @@ fn main() {
 	std::fs::create_dir_all(&jni_path)
 		.expect("An error occurred while creating the JNI folder!");
 
-    let java_gen = flapigen::Generator::new(LanguageConfig::JavaConfig(
+	let java_gen = FlapigenGenerator::new(LanguageConfig::JavaConfig(
 		JavaConfig::new(
 			jni_path,
 			"com.codemp.intellij.jni".into()

src/main/rust/error.rs

@@ -1,6 +1,4 @@
 use codemp::prelude::CodempError;
-use jni::JNIEnv;
-use crate::JAVA_FOLDER;
 
 pub struct ErrorWrapper(CodempError);
 
@@ -11,24 +9,19 @@ impl From::<CodempError> for ErrorWrapper {
 }
 
 impl ErrorWrapper {
-    pub fn throw(&self, mut env: JNIEnv) {
-        let exception_package: String = format!("{}/exceptions", JAVA_FOLDER);
-        let res = match &self.0 {
-            CodempError::Transport { status, message } => env.throw_new(format!("{}/TransportException", exception_package), format!("Error {}: {}", status, message)),
-            CodempError::InvalidState { msg } => env.throw_new(format!("{}/InvalidStateException", exception_package), msg),
-            CodempError::Filler { message } => env.throw_new(format!("{}/CodeMPException", exception_package), message),
+    pub fn get_error_message(&self) ->  String {
+        match &self.0 {
+            CodempError::Transport { status, message } =>
+                format!("Error {}: {}", status, message),
+            CodempError::InvalidState { msg } => msg.to_string(),
+            CodempError::Filler { message } => message.to_string(),
             CodempError::Channel { send } => {
-                let class_name:String = if *send {
-                    format!("{}/ChannelException/Send", exception_package)
+                if *send {
+                    "Error while sending message on channel: the channel was closed!".to_string()
                 } else {
-                    format!("{}/ChannelException/Read", exception_package)
-                };
-                env.throw_new(class_name, "The requested channel was closed!")
-            }
-        };
-
-        if let Err(e) = res {
-            panic!("An error occurred while converting a Rust error to a Java Exception: {}", e);
+                    "Error while reading message from channel: the channel was closed!".to_string()
+                }
+            }
         }
     }
 }

src/main/rust/lib.rs

@@ -1,88 +1,84 @@
 mod error;
 
-use std::ffi::c_char;
 use std::sync::Arc;
 use codemp::prelude::*;
 use rifgen::rifgen_attr::generate_interface;
 use crate::error::ErrorWrapper;
 
-pub const JAVA_PACKAGE: &str = "com.codemp.intellij";
-pub const JAVA_FOLDER: &str = "com/codemp/intellij";
-
 // #[generate_interface_doc] //TODO
 struct CodeMPHandler {}
 
 impl CodeMPHandler {
 	#[generate_interface(constructor)]
-	fn new() -> CodeMPHandler {
+	async fn new() -> CodeMPHandler {
 		CodeMPHandler {}
 	}
 
 	#[generate_interface]
-	async fn connect(addr: String) {
-		CODEMP_INSTANCE.connect(&addr).await;
-		/*match CODEMP_INSTANCE.connect(&addr) {
-			Ok(()) => (),
-			Err(err) => ErrorWrapper(err) //.throw(env)
-		}*/
+	async fn connect(addr: String) -> Result<(), String> {
+		convert(CODEMP_INSTANCE.connect(&addr).await)
 	}
 
 	#[generate_interface]
-	async fn join(session: String) -> CursorHandler {
-		let controller = CODEMP_INSTANCE.join(&session).await.unwrap();
-		CursorHandler { cursor: Some(controller) } //TODO error handling
-		/*match CODEMP_INSTANCE.join(&session) {
-			Ok(cursor) => CursorHandler { cursor },
-			//Err(err) => ErrorWrapper(err)
-		}*/
+	async fn join(session: String) -> Result<CursorHandler, String> {
+		convert_cursor(CODEMP_INSTANCE.join(&session).await)
 	}
 
 	#[generate_interface]
-	async fn create(path: String) {
-		CODEMP_INSTANCE.create(&path, None).await;
+	async fn create(path: String) -> Result<(), String> {
+		convert(CODEMP_INSTANCE.create(&path, None).await)
 	}
 
 	#[generate_interface]
-	async fn create_with_content(path: String, content: String) {
-		CODEMP_INSTANCE.create(&path, Some(&content)).await;
+	async fn create_with_content(path: String, content: String) -> Result<(), String> {
+		convert(CODEMP_INSTANCE.create(&path, Some(&content)).await)
 	}
 
 	#[generate_interface]
-	async fn attach(path: String) -> BufferHandler {
-		let controller = CODEMP_INSTANCE.attach(&path).await.unwrap();
-		BufferHandler { buffer: Some(controller) }
+	async fn attach(path: String) -> Result<BufferHandler, String> {
+		convert_buffer(CODEMP_INSTANCE.attach(&path).await)
 	}
 
 	#[generate_interface]
-	async fn get_cursor() -> CursorHandler {
-		let controller = CODEMP_INSTANCE.get_cursor().await.unwrap();
-		CursorHandler { cursor: Some(controller) }
+	async fn get_cursor() -> Result<CursorHandler, String> {
+		convert_cursor(CODEMP_INSTANCE.get_cursor().await)
 	}
 
 	#[generate_interface]
-	async fn get_buffer(path: String) -> BufferHandler {
-		let controller = CODEMP_INSTANCE.get_buffer(&path).await.unwrap();
-		BufferHandler { buffer: Some(controller) }
+	async fn get_buffer(path: String) -> Result<BufferHandler, String> {
+		convert_buffer(CODEMP_INSTANCE.get_buffer(&path).await)
 	}
 
 	#[generate_interface]
-	async fn leave_workspace() {
-		CODEMP_INSTANCE.leave_workspace().await.unwrap()
+	async fn leave_workspace() -> Result<(), String> {
+		convert(CODEMP_INSTANCE.leave_workspace().await)
 	}
 
 	#[generate_interface]
-	async fn disconnect_buffer(path: String) -> bool {
-		CODEMP_INSTANCE.disconnect_buffer(&path).await.unwrap()
+	async fn disconnect_buffer(path: String) -> Result<bool, String> {
+		convert(CODEMP_INSTANCE.disconnect_buffer(&path).await)
 	}
 }
 
+fn convert_buffer(result: Result<Arc<CodempBufferController>, CodempError>) -> Result<BufferHandler, String> {
+	convert(result).map(|val| BufferHandler { buffer: Some(val) })
+}
+
+fn convert_cursor(result: Result<Arc<CodempCursorController>, CodempError>) -> Result<CursorHandler, String> {
+	convert(result).map(|val| CursorHandler { cursor: Some(val) })
+}
+
+fn convert<T>(result: Result<T, CodempError>) -> Result<T, String> {
+	result.map_err(|err| ErrorWrapper::from(err).get_error_message())
+}
+
 struct CursorHandler {
 	cursor: Option<Arc<CodempCursorController>>
 }
 
 impl CursorHandler {
 	#[generate_interface(constructor)]
-	fn new() -> CursorHandler { //TODO this sucks but whatever
+	async fn new() -> CursorHandler { //TODO: this sucks but whatever
 		CursorHandler { cursor: None }
 	}
 }
@@ -94,7 +90,7 @@ struct BufferHandler {
 
 impl BufferHandler {
 	#[generate_interface(constructor)]
-	fn new() -> BufferHandler { //TODO this sucks but whatever
+	async fn new() -> BufferHandler { //TODO: this sucks but whatever
 		BufferHandler { buffer: None }
 	}
 }