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java/String: add static method Optional()

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This commit is contained in:
Max Kellermann 2022-08-18 16:41:28 +02:00
parent b90e32fe4e
commit 1aa3c1e543
1 changed files with 10 additions and 0 deletions
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10
src/java/String.hxx
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@ -89,6 +89,16 @@ public:
String(JNIEnv *_env, const char *_value) noexcept String(JNIEnv *_env, const char *_value) noexcept
:LocalRef<jstring>(_env, _env->NewStringUTF(_value)) {} :LocalRef<jstring>(_env, _env->NewStringUTF(_value)) {}
/**
* This constructor allows passing a nullptr value, which maps
* to a "null" in Java.
*/
static String Optional(JNIEnv *_env, const char *_value) noexcept {
return _value != nullptr
? String{_env, _value}
: String{};
}
static StringUTFChars GetUTFChars(JNIEnv *env, jstring s) noexcept { static StringUTFChars GetUTFChars(JNIEnv *env, jstring s) noexcept {
return {env, s, env->GetStringUTFChars(s, nullptr)}; return {env, s, env->GetStringUTFChars(s, nullptr)};
} }