Create `IntoJava` helper trait

2 files changed, 16 insertions, 0 deletions

diff --git a/mullvad-jni/src/into_java.rs b/mullvad-jni/src/into_java.rs
new file mode 100644
index 0000000000..a814ff79cf
--- /dev/null
+++ b/mullvad-jni/src/into_java.rs
@@ -0,0 +1,15 @@
+use jni::{objects::JString, JNIEnv};
+
+pub trait IntoJava<'env> {
+    type JavaType;
+
+    fn into_java(self, env: &JNIEnv<'env>) -> Self::JavaType;
+}
+
+impl<'env> IntoJava<'env> for String {
+    type JavaType = JString<'env>;
+
+    fn into_java(self, env: &JNIEnv<'env>) -> Self::JavaType {
+        env.new_string(&self).expect("Failed to create Java String")
+    }
+}
diff --git a/mullvad-jni/src/lib.rs b/mullvad-jni/src/lib.rs
index 647d07b0e3..3a4c0a0575 100644
--- a/mullvad-jni/src/lib.rs
+++ b/mullvad-jni/src/lib.rs
@@ -2,6 +2,7 @@
 
 mod daemon_interface;
 mod from_java;
+mod into_java;
 
 use crate::daemon_interface::DaemonInterface;
 use jni::{objects::JObject, JNIEnv};