83 lines
2.7 KiB
Rust
83 lines
2.7 KiB
Rust
use jni::{
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descriptors::Desc,
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errors::Result as JNIResult,
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objects::{JClass, JObject, JString},
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sys::{jobjectArray, jsize},
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JNIEnv,
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};
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use std::ops::Deref;
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pub(crate) mod exception;
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pub(crate) mod target_ndk;
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pub(crate) mod trace;
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pub(crate) fn java_string_to_rust(env: &JNIEnv<'_>, jstring: JString<'_>) -> String {
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env.get_string(jstring)
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.expect("Couldn't get Java string!")
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.into()
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}
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pub(crate) fn rust_vec_to_java<'a, T, U, V, F, G>(
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env: &JNIEnv<'a>,
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data: Vec<T>,
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element_class: U,
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element_map: F,
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empty_element: G,
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) -> jobjectArray
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where
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U: Desc<'a, JClass<'a>>,
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V: Deref<Target = JObject<'a>>,
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F: Fn(&JNIEnv<'a>, T) -> JNIResult<V>,
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G: Fn(&JNIEnv<'a>) -> JNIResult<V>,
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{
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let jempty = empty_element(env).expect("Couldn't create Java string!");
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let jret = env
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.new_object_array(data.len() as jsize, element_class, *jempty)
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.expect("Couldn't create Java array!");
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for (i, elem) in data.into_iter().enumerate() {
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let jelem = element_map(env, elem).expect("Couldn't map element to Java!");
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env.set_object_array_element(jret, i as jsize, *jelem)
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.expect("Couldn't set Java array element!");
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}
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jret
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}
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// 2D array
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//pub(crate) fn rust_vec_to_java_2d<'a, T, V, F, G>(
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// env: &JNIEnv<'a>,
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// data1: Vec<T>,
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// data2: Vec<T>,
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// element_map: F,
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// empty_element: G,
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//) -> jobjectArray
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//where
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// V: Deref<Target = JObject<'a>>,
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// F: Fn(&JNIEnv<'a>, T) -> JNIResult<V>,
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// G: Fn(&JNIEnv<'a>) -> JNIResult<V>,
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//{
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// let jempty = empty_element(env).expect("Couldn't create Java string!");
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// let outer = env
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// .new_object_array(
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// data1.len() as jsize,
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// "[Ljava/lang/String;",
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// *jni::objects::JObject::null(),
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// )
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// .expect("Couldn't create Java array of string arrays!");
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//
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// for (i, (elem1, elem2)) in data1.into_iter().zip(data2.into_iter()).enumerate() {
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// let inner = env
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// .new_object_array(2 as jsize, "java/lang/String", *jempty)
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// .expect("Couldn't create Java array!");
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// let jelem1 = element_map(env, elem1).expect("Couldn't map element to Java!");
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// let jelem2 = element_map(env, elem2).expect("Couldn't map element to Java!");
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// env.set_object_array_element(inner, 0 as jsize, *jelem1)
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// .expect("Couldn't set Java array element!");
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// env.set_object_array_element(inner, 1 as jsize, *jelem2)
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// .expect("Couldn't set Java array element!");
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// env.set_object_array_element(outer, i as jsize, inner)
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// .expect("Couldn't set Java array element!");
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// }
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// outer
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//}
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