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