jdk
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1/*
2* Copyright (c) 2019, 2020, Oracle and/or its affiliates. All rights reserved.
3* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4*
5* This code is free software; you can redistribute it and/or modify it
6* under the terms of the GNU General Public License version 2 only, as
7* published by the Free Software Foundation. Oracle designates this
8* particular file as subject to the "Classpath" exception as provided
9* by Oracle in the LICENSE file that accompanied this code.
10*
11* This code is distributed in the hope that it will be useful, but WITHOUT
12* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14* version 2 for more details (a copy is included in the LICENSE file that
15* accompanied this code).
16*
17* You should have received a copy of the GNU General Public License version
18* 2 along with this work; if not, write to the Free Software Foundation,
19* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20*
21* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22* or visit www.oracle.com if you need additional information or have any
23* questions.
24*/
25
26#include "JniUtils.h"27#include "ErrorHandling.h"28#include "Toolbox.h"29
30
31namespace jni {32
33void JniObjWithEnv::LocalRefDeleter::operator()(pointer v) {34if (v.env && v.obj) {35v.env->DeleteLocalRef(v.obj);36}37}
38
39
40#ifdef TSTRINGS_WITH_WCHAR41std::wstring toUnicodeString(JNIEnv *env, jstring val) {42const jchar* chars = env->GetStringChars(val, 0);43if (!chars) {44JP_THROW("GetStringChars() failed");45}46
47const auto releaseStringChars =48runAtEndOfScope([env, val, chars]() -> void {49env->ReleaseStringChars(val, chars);50});51
52const jsize len = env->GetStringLength(val);53
54return std::wstring(reinterpret_cast<const wchar_t*>(chars), len);55}
56
57
58jstring toJString(JNIEnv *env, const std::wstring& val) {59jstring result = env->NewString(60reinterpret_cast<const jchar*>(val.c_str()), jsize(val.size()));61if (!result) {62JP_THROW("NewString() failed");63}64return result;65}
66#endif67
68
69tstring_array toUnicodeStringArray(JNIEnv *env, jobjectArray val) {70tstring_array result;71
72const jsize len = env->GetArrayLength(val);73for (int i = 0; i < len; ++i) {74LocalRef localRef(JniObjWithEnv(env,75env->GetObjectArrayElement(val, i)));76result.push_back(toUnicodeString(env,77static_cast<jstring>(localRef.get().obj)));78}79
80return result;81}
82
83} // namespace jni84