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use std::os::raw::c_char;
use std::borrow::Cow;
use JNIEnv;
use objects::JString;
use errors::*;
use strings::JNIStr;
pub struct JavaStr<'a> {
internal: *const c_char,
obj: JString<'a>,
env: &'a JNIEnv<'a>,
}
impl<'a> JavaStr<'a> {
pub fn from_env(env: &'a JNIEnv<'a>, obj: JString<'a>) -> Result<Self> {
let ptr = unsafe { env.get_string_utf_chars(obj)? };
let java_str = JavaStr {
internal: ptr,
env: env,
obj: obj,
};
Ok(java_str)
}
pub fn get_raw(&self) -> *const c_char {
self.internal
}
}
impl<'a> ::std::ops::Deref for JavaStr<'a> {
type Target = JNIStr;
fn deref(&self) -> &Self::Target {
self.into()
}
}
impl<'a> From<&'a JavaStr<'a>> for &'a JNIStr {
fn from(other: &'a JavaStr) -> &'a JNIStr {
unsafe { JNIStr::from_ptr(other.internal) }
}
}
impl<'a> From<&'a JavaStr<'a>> for Cow<'a, str> {
fn from(other: &'a JavaStr) -> Cow<'a, str> {
let jni_str: &JNIStr = &*other;
jni_str.into()
}
}
impl<'a> From<JavaStr<'a>> for String {
fn from(other: JavaStr) -> String {
let cow: Cow<str> = (&other).into();
cow.into_owned()
}
}
impl<'a> Drop for JavaStr<'a> {
fn drop(&mut self) {
match unsafe { self.env.release_string_utf_chars(self.obj, self.internal) } {
Ok(()) => {}
Err(e) => warn!("error dropping java str: {}", e),
}
}
}