rust_jni/
version.rs

1use jni_sys;
2
3/// JNI Version enum.
4///
5/// Maps to the `jni_sys::JNI_VERSION_1_*` constants.
6///
7/// [JNI documentation](https://docs.oracle.com/javase/10/docs/specs/jni/functions.html#version-constants)
8#[derive(Debug, Copy, Clone, PartialEq, Eq)]
9pub enum JniVersion {
10    /// JNI 1.1.
11    V1,
12    /// JNI 1.2.
13    V2,
14    /// JNI 1.4.
15    V4,
16    /// JNI 1.6.
17    V6,
18    /// JNI 1.8.
19    V8,
20    /// Unknown version.
21    /// Needed for forward compability and to request a version that has not been added yet.
22    Unknown(i32),
23}
24
25/// Convert from a raw `jint` version.
26pub fn from_raw(version: jni_sys::jint) -> JniVersion {
27    match version {
28        jni_sys::JNI_VERSION_1_1 => JniVersion::V1,
29        jni_sys::JNI_VERSION_1_2 => JniVersion::V2,
30        jni_sys::JNI_VERSION_1_4 => JniVersion::V4,
31        jni_sys::JNI_VERSION_1_6 => JniVersion::V6,
32        jni_sys::JNI_VERSION_1_8 => JniVersion::V8,
33        _ => JniVersion::Unknown(version),
34    }
35}
36
37#[cfg(test)]
38mod from_raw_tests {
39    use super::*;
40
41    #[test]
42    fn from_raw_version() {
43        assert_eq!(from_raw(jni_sys::JNI_VERSION_1_1), JniVersion::V1);
44        assert_eq!(from_raw(jni_sys::JNI_VERSION_1_2), JniVersion::V2);
45        assert_eq!(from_raw(jni_sys::JNI_VERSION_1_4), JniVersion::V4);
46        assert_eq!(from_raw(jni_sys::JNI_VERSION_1_6), JniVersion::V6);
47        assert_eq!(from_raw(jni_sys::JNI_VERSION_1_8), JniVersion::V8);
48    }
49
50    #[test]
51    fn from_unknown_raw_version() {
52        assert_eq!(from_raw(7), JniVersion::Unknown(7));
53    }
54}
55
56/// Convert to a raw `jint` version.
57pub fn to_raw(version: JniVersion) -> jni_sys::jint {
58    match version {
59        JniVersion::V1 => jni_sys::JNI_VERSION_1_1,
60        JniVersion::V2 => jni_sys::JNI_VERSION_1_2,
61        JniVersion::V4 => jni_sys::JNI_VERSION_1_4,
62        JniVersion::V6 => jni_sys::JNI_VERSION_1_6,
63        JniVersion::V8 => jni_sys::JNI_VERSION_1_8,
64        JniVersion::Unknown(version) => version,
65    }
66}
67
68#[cfg(test)]
69mod to_raw_tests {
70    use super::*;
71
72    #[test]
73    fn to_raw_version() {
74        assert_eq!(to_raw(JniVersion::V1), jni_sys::JNI_VERSION_1_1);
75        assert_eq!(to_raw(JniVersion::V2), jni_sys::JNI_VERSION_1_2);
76        assert_eq!(to_raw(JniVersion::V4), jni_sys::JNI_VERSION_1_4);
77        assert_eq!(to_raw(JniVersion::V6), jni_sys::JNI_VERSION_1_6);
78        assert_eq!(to_raw(JniVersion::V8), jni_sys::JNI_VERSION_1_8);
79    }
80
81    #[test]
82    fn to_unknown_raw_version() {
83        assert_eq!(to_raw(JniVersion::Unknown(7)), 7);
84    }
85}
rust_jni/version.rs

rust_jni/
version.rs
