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/*
* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/examples/android/media_demo/jni/jni_helpers.h"
#include <limits>
#include "unicode/unistr.h"
using icu::UnicodeString;
jmethodID GetMethodID(JNIEnv* jni, jclass c, const std::string& name,
const char* signature) {
jmethodID m = jni->GetMethodID(c, name.c_str(), signature);
CHECK_JNI_EXCEPTION(jni, "error during GetMethodID");
return m;
}
jlong jlongFromPointer(void* ptr) {
CHECK(sizeof(intptr_t) <= sizeof(jlong), "Time to rethink the use of jlongs");
// Going through intptr_t to be obvious about the definedness of the
// conversion from pointer to integral type. intptr_t to jlong is a standard
// widening by the COMPILE_ASSERT above.
jlong ret = reinterpret_cast<intptr_t>(ptr);
CHECK(reinterpret_cast<void*>(ret) == ptr,
"jlong does not convert back to pointer");
return ret;
}
// Given a (UTF-16) jstring return a new UTF-8 native string.
std::string JavaToStdString(JNIEnv* jni, const jstring& j_string) {
const jchar* jchars = jni->GetStringChars(j_string, NULL);
CHECK_JNI_EXCEPTION(jni, "Error during GetStringChars");
UnicodeString ustr(jchars, jni->GetStringLength(j_string));
CHECK_JNI_EXCEPTION(jni, "Error during GetStringLength");
jni->ReleaseStringChars(j_string, jchars);
CHECK_JNI_EXCEPTION(jni, "Error during ReleaseStringChars");
std::string ret;
return ustr.toUTF8String(ret);
}
ClassReferenceHolder::ClassReferenceHolder(JNIEnv* jni, const char** classes,
int size) {
for (int i = 0; i < size; ++i) {
LoadClass(jni, classes[i]);
}
}
ClassReferenceHolder::~ClassReferenceHolder() {
CHECK(classes_.empty(), "Must call FreeReferences() before dtor!");
}
void ClassReferenceHolder::FreeReferences(JNIEnv* jni) {
for (std::map<std::string, jclass>::const_iterator it = classes_.begin();
it != classes_.end(); ++it) {
jni->DeleteGlobalRef(it->second);
}
classes_.clear();
}
jclass ClassReferenceHolder::GetClass(const std::string& name) {
std::map<std::string, jclass>::iterator it = classes_.find(name);
CHECK(it != classes_.end(), "Could not find class");
return it->second;
}
void ClassReferenceHolder::LoadClass(JNIEnv* jni, const std::string& name) {
jclass localRef = jni->FindClass(name.c_str());
CHECK_JNI_EXCEPTION(jni, "Could not load class");
CHECK(localRef, name.c_str());
jclass globalRef = reinterpret_cast<jclass>(jni->NewGlobalRef(localRef));
CHECK_JNI_EXCEPTION(jni, "error during NewGlobalRef");
CHECK(globalRef, name.c_str());
bool inserted = classes_.insert(std::make_pair(name, globalRef)).second;
CHECK(inserted, "Duplicate class name");
}
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