diff --git a/dist/java/src/mp/code/BufferController.java b/dist/java/src/mp/code/BufferController.java
index 818bed6..32f2704 100644
--- a/dist/java/src/mp/code/BufferController.java
+++ b/dist/java/src/mp/code/BufferController.java
@@ -1,5 +1,6 @@
 package mp.code;
 
+import mp.code.data.Callback;
 import mp.code.data.Cursor;
 import mp.code.data.TextChange;
 import mp.code.exceptions.ControllerException;
@@ -38,6 +39,11 @@ public class BufferController {
 		send(this.ptr, change);
 	}
 
+	private static native void callback(long self, Callback<BufferController> cb);
+	public void callback(Callback<BufferController> cb) {
+		callback(this.ptr, cb);
+	}
+
 	private static native void free(long self);
 	@Override
 	protected void finalize() {
diff --git a/dist/java/src/mp/code/Client.java b/dist/java/src/mp/code/Client.java
index 0b1348a..acd65c6 100644
--- a/dist/java/src/mp/code/Client.java
+++ b/dist/java/src/mp/code/Client.java
@@ -1,6 +1,7 @@
 package mp.code;
 
 import cz.adamh.utils.NativeUtils;
+import mp.code.data.User;
 import mp.code.exceptions.ConnectionException;
 import mp.code.exceptions.ConnectionRemoteException;
 
@@ -17,9 +18,9 @@ public class Client {
 		this.ptr = ptr;
 	}
 
-	private static native String get_url(long self);
-	public String getUrl() {
-		return get_url(this.ptr);
+	private static native User get_user(long self);
+	public User getUser() {
+		return get_user(this.ptr);
 	}
 
 	private static native Workspace join_workspace(long self, String id) throws ConnectionException;
@@ -47,6 +48,11 @@ public class Client {
 		return list_workspaces(this.ptr, owned, invited);
 	}
 
+	private static native String[] active_workspaces(long self);
+	public String[] activeWorkspaces() {
+		return active_workspaces(this.ptr);
+	}
+
 	private static native boolean leave_workspace(long self, String id);
 	public boolean leaveWorkspace(String id) {
 		return leave_workspace(this.ptr, id);
@@ -57,9 +63,9 @@ public class Client {
 		return Optional.ofNullable(get_workspace(this.ptr, workspace));
 	}
 
-	private static native void refresh_native(long self) throws ConnectionRemoteException;
+	private static native void refresh(long self) throws ConnectionRemoteException;
 	public void refresh() throws ConnectionRemoteException {
-		refresh_native(this.ptr);
+		refresh(this.ptr);
 	}
 	
 	private static native void free(long self);
diff --git a/dist/java/src/mp/code/CursorController.java b/dist/java/src/mp/code/CursorController.java
index fb93983..850fcae 100644
--- a/dist/java/src/mp/code/CursorController.java
+++ b/dist/java/src/mp/code/CursorController.java
@@ -1,5 +1,6 @@
 package mp.code;
 
+import mp.code.data.Callback;
 import mp.code.data.Cursor;
 import mp.code.exceptions.ControllerException;
 
@@ -27,6 +28,11 @@ public class CursorController {
 		send(this.ptr, cursor);
 	}
 
+	private static native void callback(long self, Callback<CursorController> cb);
+	public void callback(Callback<CursorController> cb) {
+		callback(this.ptr, cb);
+	}
+
 	private static native void free(long self);
 	@Override
 	protected void finalize() {
diff --git a/dist/java/src/mp/code/data/Callback.java b/dist/java/src/mp/code/data/Callback.java
new file mode 100644
index 0000000..c436f67
--- /dev/null
+++ b/dist/java/src/mp/code/data/Callback.java
@@ -0,0 +1,6 @@
+package mp.code.data;
+
+@FunctionalInterface
+public interface Callback<T> {
+	void invoke(T controller);
+}
diff --git a/dist/java/src/mp/code/data/User.java b/dist/java/src/mp/code/data/User.java
new file mode 100644
index 0000000..0c672bb
--- /dev/null
+++ b/dist/java/src/mp/code/data/User.java
@@ -0,0 +1,13 @@
+package mp.code.data;
+
+import java.util.UUID;
+
+public class User {
+	public final UUID id;
+	public final String name;
+
+	public User(UUID id, String name) {
+		this.id = id;
+		this.name = name;
+	}
+}
diff --git a/src/ffi/java/client.rs b/src/ffi/java/client.rs
index 328d509..c0dbd5b 100644
--- a/src/ffi/java/client.rs
+++ b/src/ffi/java/client.rs
@@ -1,7 +1,7 @@
 use jni::{objects::{JClass, JObject, JString, JValueGen}, sys::{jboolean, jint, jlong, jobject, jobjectArray}, JNIEnv};
 use crate::{api::Config, client::Client, Workspace};
 
-use super::{JExceptable, RT};
+use super::{JExceptable, JObjectify, RT};
 
 /// Connect using the given credentials to the default server, and return a [Client] to interact with it.
 #[no_mangle]
@@ -72,6 +72,20 @@ fn connect_internal(mut env: JNIEnv, config: Config) -> jobject {
 		}).jexcept(&mut env).as_raw()
 }
 
+/// Gets the current [crate::api::User].
+#[no_mangle]
+pub extern "system" fn Java_mp_code_Client_get_1user(
+	mut env: JNIEnv,
+	_class: JClass,
+	self_ptr: jlong
+) -> jobject {
+	let client = unsafe { Box::leak(Box::from_raw(self_ptr as *mut Client)) };
+	client.user().clone()
+		.jobjectify(&mut env)
+		.jexcept(&mut env)
+		.as_raw()
+}
+
 /// Join a [Workspace] and return a pointer to it.
 #[no_mangle]
 pub extern "system" fn Java_mp_code_Client_join_1workspace<'local>(
@@ -162,7 +176,26 @@ pub extern "system" fn Java_mp_code_Client_list_1workspaces<'local>(
 	let list = RT
 		.block_on(client.list_workspaces(owned != 0, invited != 0))
 		.jexcept(&mut env);
+	env.find_class("java/lang/String")
+		.and_then(|class| env.new_object_array(list.len() as i32, class, JObject::null()))
+		.inspect(|arr| {
+			for (idx, path) in list.iter().enumerate() {
+				env.new_string(path)
+					.and_then(|path| env.set_object_array_element(arr, idx as i32, path))
+					.jexcept(&mut env)
+			}
+		}).jexcept(&mut env).as_raw()
+}
 
+/// List available workspaces.
+#[no_mangle]
+pub extern "system" fn Java_mp_code_Client_active_1workspaces<'local>(
+	mut env: JNIEnv<'local>,
+	_class: JClass<'local>,
+	self_ptr: jlong
+) -> jobjectArray {
+	let client = unsafe { Box::leak(Box::from_raw(self_ptr as *mut Client)) };
+	let list = client.active_workspaces();
 	env.find_class("java/lang/String")
 		.and_then(|class| env.new_object_array(list.len() as i32, class, JObject::null()))
 		.inspect(|arr| {
diff --git a/src/ffi/java/mod.rs b/src/ffi/java/mod.rs
index 54cc19a..3bcb617 100644
--- a/src/ffi/java/mod.rs
+++ b/src/ffi/java/mod.rs
@@ -114,12 +114,29 @@ pub(crate) trait JObjectify<'local> {
 impl<'local> JObjectify<'local> for uuid::Uuid {
 	type Error = jni::errors::Error;
 	fn jobjectify(self, env: &mut jni::JNIEnv<'local>) -> Result<jni::objects::JObject<'local>, Self::Error> {
-		env.find_class("java/util/UUID").and_then(|class| {
-			let (msb, lsb) = self.as_u64_pair();
-			let msb = i64::from_ne_bytes(msb.to_ne_bytes());
-			let lsb = i64::from_ne_bytes(lsb.to_ne_bytes());
-			env.new_object(&class, "(JJ)V", &[jni::objects::JValueGen::Long(msb), jni::objects::JValueGen::Long(lsb)])
-		})
+		let class = env.find_class("java/util/UUID")?;
+		let (msb, lsb) = self.as_u64_pair();
+		let msb = i64::from_ne_bytes(msb.to_ne_bytes());
+		let lsb = i64::from_ne_bytes(lsb.to_ne_bytes());
+		env.new_object(&class, "(JJ)V", &[jni::objects::JValueGen::Long(msb), jni::objects::JValueGen::Long(lsb)])
+	}
+}
+
+impl<'local> JObjectify<'local> for crate::api::User {
+	type Error = jni::errors::Error;
+
+	fn jobjectify(self, env: &mut jni::JNIEnv<'local>) -> Result<jni::objects::JObject<'local>, Self::Error> {
+		let id_field = self.id.jobjectify(env)?;
+		let name_field = env.new_string(self.name)?;
+		let class = env.find_class("mp/code/data/User")?;
+		env.new_object(
+			&class,
+			"(Ljava/util/UUID;Ljava/lang/String;)V",
+			&[
+				jni::objects::JValueGen::Object(&id_field),
+				jni::objects::JValueGen::Object(&name_field)
+			]
+		)
 	}
 }
 
diff --git a/src/workspace.rs b/src/workspace.rs
index a59af0d..1977f63 100644
--- a/src/workspace.rs
+++ b/src/workspace.rs
@@ -285,7 +285,7 @@ impl Workspace {
 		self.0.filetree.iter()
 			.filter(|f| filter.map_or(true, |flt| {
 				if strict {
-					f.eq(flt)
+					f.as_str() == flt
 				} else {
 					f.starts_with(flt)
 				}