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/*
* Copyright (C) 2011 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 <string>
#include "jni/jni_util.h"
#include "base/logging.h"
#if 0
JavaObject::JavaObject()
: object_(JNI_NULL),
ref_count_(new int(0)) {
}
JavaObject::JavaObject(const JavaObject& java_obj)
: object_(java_obj.object_),
ref_count_(java_obj.ref_count_) {
Retain();
}
JavaObject::JavaObject(jobject object, JNIEnv* env)
: object_(NULL),
ref_count_(new int(0)) {
Retain();
object_ = env->NewGlobalRef(object_);
}
JavaObject::~JavaObject() {
Release();
}
JavaObject& JavaObject::operator=(const JavaObject& java_obj) {
Release();
object_ = java_obj.object_;
ref_count_ = java_obj.ref_count_;
Retain();
return *this;
}
void JavaObject::Retain() {
if (ref_count_)
++(*ref_count_);
else
ALOGE("JavaObject: Reference count is NULL! JavaObject may be corrupted.");
}
void JavaObject::Release() {
if (ref_count_) {
if (*ref_count_ > 0)
--(*ref_count_);
if (*ref_count_ == 0) {
JNIEnv* env = GetCurrentJNIEnv();
if (!env)
ALOGE("JavaObject: Releasing outside of Java thread. Will just leak!");
else if (object_)
env->DeleteGlobalRef(object_);
delete ref_count_;
ref_count_ = NULL;
}
} else {
ALOGE("JavaObject: Reference count is NULL! JavaObject may be corrupted.");
}
}
void JavaObject::Reset() {
Release();
object_ = NULL;
ref_count_ = new int(0);
}
JavaVM* GetCurrentJavaVM() {
return g_current_java_vm_;
}
JNIEnv* GetCurrentJNIEnv() {
JavaVM* vm = GetCurrentJavaVM();
JNIEnv* env = NULL;
const jint result = vm->GetEnv(reinterpret_cast<void**>(&env),
JNI_VERSION_1_4);
return result == JNI_OK ? env : NULL;
}
#endif
jstring ToJString(JNIEnv* env, const std::string& value) {
return env->NewStringUTF(value.c_str());
}
std::string ToCppString(JNIEnv* env, jstring value) {
jboolean isCopy;
const char* c_value = env->GetStringUTFChars(value, &isCopy);
std::string result(c_value);
if (isCopy == JNI_TRUE)
env->ReleaseStringUTFChars(value, c_value);
return result;
}
jboolean ToJBool(bool value) {
return value ? JNI_TRUE : JNI_FALSE;
}
bool ToCppBool(jboolean value) {
return value == JNI_TRUE;
}
// TODO: We actually shouldn't use such a function as it requires a class name lookup at every
// invocation. Instead, store the class objects and use those.
bool IsJavaInstanceOf(JNIEnv* env, jobject object, const std::string& class_name) {
jclass clazz = env->FindClass(class_name.c_str());
return clazz ? env->IsInstanceOf(object, clazz) == JNI_TRUE : false;
}
template<typename T>
jobject CreateJObject(JNIEnv* env, const std::string& class_name, const std::string& signature, T value) {
jobject result = JNI_NULL;
return result;
}
Value ToCValue(JNIEnv* env, jobject object) {
Value result = MakeNullValue();
if (object != NULL) {
if (IsJavaInstanceOf(env, object, "java/lang/Boolean")) {
jmethodID method = env->GetMethodID(env->GetObjectClass(object), "booleanValue", "()Z");
result = MakeIntValue(env->CallBooleanMethod(object, method) == JNI_TRUE ? 1 : 0);
} else if (IsJavaInstanceOf(env, object, "java/lang/Integer")) {
jmethodID method = env->GetMethodID(env->GetObjectClass(object), "intValue", "()I");
result = MakeIntValue(env->CallIntMethod(object, method));
} else if (IsJavaInstanceOf(env, object, "java/lang/Float")) {
jmethodID method = env->GetMethodID(env->GetObjectClass(object), "floatValue", "()F");
result = MakeFloatValue(env->CallFloatMethod(object, method));
} else if (IsJavaInstanceOf(env, object, "java/lang/String")) {
result = MakeStringValue(ToCppString(env, static_cast<jstring>(object)).c_str());
} else if (IsJavaInstanceOf(env, object, "[I")) {
jint* elems = env->GetIntArrayElements(static_cast<jintArray>(object), NULL);
const jint count = env->GetArrayLength(static_cast<jintArray>(object));
result = MakeIntArrayValue(elems, count);
env->ReleaseIntArrayElements(static_cast<jintArray>(object), elems, JNI_ABORT);
} else if (IsJavaInstanceOf(env, object, "[F")) {
jfloat* elems = env->GetFloatArrayElements(static_cast<jfloatArray>(object), NULL);
const jint count = env->GetArrayLength(static_cast<jfloatArray>(object));
result = MakeFloatArrayValue(elems, count);
env->ReleaseFloatArrayElements(static_cast<jfloatArray>(object), elems, JNI_ABORT);
}
}
return result;
}
jobject ToJObject(JNIEnv* env, const Value& value) {
jobject result = JNI_NULL;
if (ValueIsInt(value)) {
jclass clazz = env->FindClass("java/lang/Integer");
jmethodID constructorID = env->GetMethodID(clazz, "<init>", "(I)V");
result = env->NewObject(clazz, constructorID, GetIntValue(value));
} else if (ValueIsFloat(value)) {
jclass clazz = env->FindClass("java/lang/Float");
jmethodID constructorID = env->GetMethodID(clazz, "<init>", "(F)V");
result = env->NewObject(clazz, constructorID, GetFloatValue(value));
} else if (ValueIsString(value)) {
result = ToJString(env, GetStringValue(value));
} else if (ValueIsIntArray(value)) {
result = env->NewIntArray(GetValueCount(value));
env->SetIntArrayRegion(static_cast<jintArray>(result),
0,
GetValueCount(value),
reinterpret_cast<const jint*>(GetIntArrayValue(value)));
} else if (ValueIsFloatArray(value)) {
result = env->NewFloatArray(GetValueCount(value));
env->SetFloatArrayRegion(static_cast<jfloatArray>(result),
0,
GetValueCount(value),
reinterpret_cast<const jfloat*>(GetFloatArrayValue(value)));
}
return result;
}
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