j4rs 0.25.1

j4rs stands for 'Java for Rust' and allows effortless calls to Java code, from Rust
Documentation 
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use std::os::raw::c_void;

// Copyright 2018 astonbitecode
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use crate::errors;
use jni_sys::{jclass, jint, jobject, jsize, JNIEnv, JavaVM};

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
mod generic;

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
pub fn get_created_java_vms(
    vm_buf: &mut Vec<*mut JavaVM>,
    buf_len: jsize,
    n_vms: *mut jsize,
) -> jint {
    generic::get_created_java_vms(vm_buf, buf_len, n_vms)
}

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
pub fn set_java_vm(_: *mut JavaVM) {}

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
pub fn create_java_vm(pvm: *mut *mut JavaVM, penv: *mut *mut c_void, args: *mut c_void) -> jint {
    generic::create_java_vm(pvm, penv, args)
}

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
pub fn find_class(env: *mut JNIEnv, classname: &str) -> errors::Result<jclass> {
    generic::find_class(env, classname)
}

#[cfg(all(not(feature = "no-runtime-libloading"), not(target_os = "android")))]
pub fn cache_classloader_of(_env: *mut JNIEnv, _obj: jobject) -> errors::Result<()> {Ok(())}
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
mod no_runtime_lib_loading;

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
pub fn get_created_java_vms(
    vm_buf: &mut Vec<*mut JavaVM>,
    buf_len: jsize,
    n_vms: *mut jsize,
) -> jint {
    no_runtime_lib_loading::get_created_java_vms(vm_buf, buf_len, n_vms)
}

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
pub fn set_java_vm(_: *mut JavaVM) {}

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
pub fn create_java_vm(pvm: *mut *mut JavaVM, penv: *mut *mut c_void, args: *mut c_void) -> jint {
    no_runtime_lib_loading::create_java_vm(pvm, penv, args)
}

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
pub fn find_class(env: *mut JNIEnv, classname: &str) -> errors::Result<jclass> {
    no_runtime_lib_loading::find_class(env, classname)
}

#[cfg(all(feature = "no-runtime-libloading", not(target_os = "android")))]
pub fn cache_classloader_of(_env: *mut JNIEnv, _obj: jobject) -> errors::Result<()> {Ok(())}
// ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ //

#[cfg(target_os = "android")]
mod android;

#[cfg(target_os = "android")]
pub fn get_created_java_vms(
    vm_buf: &mut Vec<*mut JavaVM>,
    buf_len: jsize,
    n_vms: *mut jsize,
) -> jint {
    android::get_created_java_vms(vm_buf, buf_len, n_vms)
}

#[cfg(target_os = "android")]
pub fn set_java_vm(java_vm: *mut JavaVM) {
    android::set_java_vm(java_vm);
}

#[cfg(target_os = "android")]
pub fn create_java_vm(pvm: *mut *mut JavaVM, penv: *mut *mut c_void, args: *mut c_void) -> jint {
    android::create_java_vm(pvm, penv, args)
}

#[cfg(target_os = "android")]
pub fn find_class(env: *mut JNIEnv, classname: &str) -> errors::Result<jclass> {
    android::find_class(env, classname)
}

#[cfg(target_os = "android")]
pub fn cache_classloader_of(env: *mut JNIEnv, obj: jobject) -> errors::Result<()> {
    android::cache_classloader_of(env, obj)
}