jdk

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/*
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 * Copyright (c) 2019, 2020, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "JniUtils.h"
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#include "ErrorHandling.h"
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#include "Toolbox.h"
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namespace jni {
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void JniObjWithEnv::LocalRefDeleter::operator()(pointer v) {
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    if (v.env && v.obj) {
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        v.env->DeleteLocalRef(v.obj);
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    }
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}
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#ifdef TSTRINGS_WITH_WCHAR
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std::wstring toUnicodeString(JNIEnv *env, jstring val) {
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    const jchar* chars = env->GetStringChars(val, 0);
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    if (!chars) {
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        JP_THROW("GetStringChars() failed");
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    }
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    const auto releaseStringChars =
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            runAtEndOfScope([env, val, chars]() -> void {
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        env->ReleaseStringChars(val, chars);
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    });
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    const jsize len = env->GetStringLength(val);
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    return std::wstring(reinterpret_cast<const wchar_t*>(chars), len);
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}
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jstring toJString(JNIEnv *env, const std::wstring& val) {
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    jstring result = env->NewString(
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            reinterpret_cast<const jchar*>(val.c_str()), jsize(val.size()));
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    if (!result) {
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        JP_THROW("NewString() failed");
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    }
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    return result;
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}
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#endif
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tstring_array toUnicodeStringArray(JNIEnv *env, jobjectArray val) {
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    tstring_array result;
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    const jsize len = env->GetArrayLength(val);
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    for (int i = 0; i < len; ++i) {
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        LocalRef localRef(JniObjWithEnv(env,
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                env->GetObjectArrayElement(val, i)));
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        result.push_back(toUnicodeString(env,
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                static_cast<jstring>(localRef.get().obj)));
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    }
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    return result;
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}
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} // namespace jni
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