/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "utils/java/jni-base.h"
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#include <jni.h>
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#include <type_traits>
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#include <vector>
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#include "utils/base/integral_types.h"
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#include "utils/java/scoped_local_ref.h"
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#include "utils/java/string_utils.h"
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#include "utils/memory/mmap.h"
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using libtextclassifier3::JStringToUtf8String;
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using libtextclassifier3::ScopedLocalRef;
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namespace libtextclassifier3 {
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std::string ToStlString(JNIEnv* env, const jstring& str) {
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std::string result;
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JStringToUtf8String(env, str, &result);
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return result;
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}
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jint GetFdFromFileDescriptor(JNIEnv* env, jobject fd) {
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ScopedLocalRef<jclass> fd_class(env->FindClass("java/io/FileDescriptor"),
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env);
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if (fd_class == nullptr) {
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TC3_LOG(ERROR) << "Couldn't find FileDescriptor.";
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return reinterpret_cast<jlong>(nullptr);
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}
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jfieldID fd_class_descriptor =
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env->GetFieldID(fd_class.get(), "descriptor", "I");
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if (fd_class_descriptor == nullptr) {
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env->ExceptionClear();
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fd_class_descriptor = env->GetFieldID(fd_class.get(), "fd", "I");
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}
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if (fd_class_descriptor == nullptr) {
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TC3_LOG(ERROR) << "Couldn't find descriptor.";
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return reinterpret_cast<jlong>(nullptr);
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}
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return env->GetIntField(fd, fd_class_descriptor);
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}
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jint GetFdFromAssetFileDescriptor(JNIEnv* env, jobject afd) {
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ScopedLocalRef<jclass> afd_class(
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env->FindClass("android/content/res/AssetFileDescriptor"), env);
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if (afd_class == nullptr) {
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TC3_LOG(ERROR) << "Couldn't find AssetFileDescriptor.";
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return reinterpret_cast<jlong>(nullptr);
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}
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jmethodID afd_class_getFileDescriptor = env->GetMethodID(
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afd_class.get(), "getFileDescriptor", "()Ljava/io/FileDescriptor;");
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if (afd_class_getFileDescriptor == nullptr) {
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TC3_LOG(ERROR) << "Couldn't find getFileDescriptor.";
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return reinterpret_cast<jlong>(nullptr);
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}
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jobject bundle_jfd = env->CallObjectMethod(afd, afd_class_getFileDescriptor);
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return GetFdFromFileDescriptor(env, bundle_jfd);
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}
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} // namespace libtextclassifier3
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