81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
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/*
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* Copyright 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "sdk/android/src/jni/class_loader.h"
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#include <algorithm>
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#include <string>
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#include "rtc_base/checks.h"
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#include "sdk/android/generated_base_jni/jni/ClassLoader_jni.h"
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// Abort the process if |jni| has a Java exception pending. This macros uses the
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// comma operator to execute ExceptionDescribe and ExceptionClear ignoring their
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// return values and sending "" to the error stream.
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#define CHECK_EXCEPTION(jni) \
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RTC_CHECK(!jni->ExceptionCheck()) \
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<< (jni->ExceptionDescribe(), jni->ExceptionClear(), "")
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namespace webrtc {
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namespace jni {
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namespace {
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class ClassLoader {
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public:
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explicit ClassLoader(JNIEnv* env) {
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class_loader_class_ = reinterpret_cast<jclass>(
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env->NewGlobalRef(env->FindClass("java/lang/ClassLoader")));
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CHECK_EXCEPTION(env);
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load_class_method_ =
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env->GetMethodID(class_loader_class_, "loadClass",
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"(Ljava/lang/String;)Ljava/lang/Class;");
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CHECK_EXCEPTION(env);
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class_loader_ = env->NewGlobalRef(Java_ClassLoader_getClassLoader(env));
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CHECK_EXCEPTION(env);
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}
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jclass FindClass(JNIEnv* env, const char* c_name) {
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// ClassLoader.loadClass expects a classname with components separated by
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// dots instead of the slashes that JNIEnv::FindClass expects.
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std::string name(c_name);
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std::replace(name.begin(), name.end(), '/', '.');
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jstring jstr = env->NewStringUTF(name.c_str());
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const jclass clazz = static_cast<jclass>(
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env->CallObjectMethod(class_loader_, load_class_method_, jstr));
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CHECK_EXCEPTION(env);
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return clazz;
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}
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private:
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jclass class_loader_class_;
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jmethodID load_class_method_;
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jobject class_loader_;
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};
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static ClassLoader* g_class_loader = nullptr;
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} // namespace
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void InitClassLoader(JNIEnv* env) {
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RTC_CHECK(g_class_loader == nullptr);
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g_class_loader = new ClassLoader(env);
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}
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jclass GetClass(JNIEnv* env, const char* name) {
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// The class loader will be null in the JNI code called from the ClassLoader
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// ctor when we are bootstrapping ourself.
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return (g_class_loader == nullptr) ? env->FindClass(name)
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: g_class_loader->FindClass(env, name);
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}
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} // namespace jni
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} // namespace webrtc
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