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node-java/src/utils.cpp at master · yslimmm/node-java · GitHub
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#
include
"
utils.h
"
#
include
<
string.h
>
#
include
<
algorithm
>
#
include
<
sstream
>
#
include
<
set
>
#
include
"
javaObject.h
"
#
include
"
java.h
"
#
define
MODIFIER_STATIC
9
jobject
v8ToJava_javaObject
(JNIEnv* env, v8::Local<v8::Object> obj);
jobject
v8ToJava_javaLong
(JNIEnv* env, v8::Local<v8::Object> obj);
void
javaReflectionGetMethods
(JNIEnv *env, jclass clazz, std::list<jobject>* methods,
bool
includeStatic) {
jclass clazzclazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID clazz_getMethods = env->
GetMethodID
(clazzclazz,
"
getMethods
"
,
"
()[Ljava/lang/reflect/Method;
"
);
jclass methodClazz = env->
FindClass
(
"
java/lang/reflect/Method
"
);
jmethodID method_getModifiers = env->
GetMethodID
(methodClazz,
"
getModifiers
"
,
"
()I
"
);
jobjectArray methodObjects = (jobjectArray)env->
CallObjectMethod
(clazz, clazz_getMethods);
checkJavaException
(env);
jsize methodCount = env->
GetArrayLength
(methodObjects);
for
(jsize i=
0
; i<methodCount; i++) {
jobject method = env->
GetObjectArrayElement
(methodObjects, i);
jint methodModifiers = env->
CallIntMethod
(method, method_getModifiers);
assertNoException
(env);
if
(!includeStatic && (methodModifiers &
MODIFIER_STATIC
) ==
MODIFIER_STATIC
) {
continue
;
}
methods->
push_back
(method);
}
}
void
javaReflectionGetConstructors
(JNIEnv *env, jclass clazz, std::list<jobject>* methods) {
jclass clazzclazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID clazz_getConstructors = env->
GetMethodID
(clazzclazz,
"
getConstructors
"
,
"
()[Ljava/lang/reflect/Constructor;
"
);
jobjectArray constructorObjects = (jobjectArray)env->
CallObjectMethod
(clazz, clazz_getConstructors);
checkJavaException
(env);
jsize constructorCount = env->
GetArrayLength
(constructorObjects);
for
(jsize i=
0
; i<constructorCount; i++) {
jobject constructor = env->
GetObjectArrayElement
(constructorObjects, i);
methods->
push_back
(constructor);
}
}
void
javaReflectionGetFields
(JNIEnv *env, jclass clazz, std::list<jobject>* fields) {
jclass clazzclazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID clazz_getFields = env->
GetMethodID
(clazzclazz,
"
getFields
"
,
"
()[Ljava/lang/reflect/Field;
"
);
jclass fieldClazz = env->
FindClass
(
"
java/lang/reflect/Field
"
);
jmethodID field_getModifiers = env->
GetMethodID
(fieldClazz,
"
getModifiers
"
,
"
()I
"
);
jobjectArray fieldObjects = (jobjectArray)env->
CallObjectMethod
(clazz, clazz_getFields);
assertNoException
(env);
jsize fieldCount = env->
GetArrayLength
(fieldObjects);
for
(jsize i=
0
; i<fieldCount; i++) {
jobject field = env->
GetObjectArrayElement
(fieldObjects, i);
jint fieldModifiers = env->
CallIntMethod
(field, field_getModifiers);
checkJavaException
(env);
if
((fieldModifiers &
MODIFIER_STATIC
) ==
MODIFIER_STATIC
) {
continue
;
}
fields->
push_back
(field);
}
}
std::string
javaToString
(JNIEnv *env, jstring str) {
jclass objClazz = env->
GetObjectClass
(str);
jmethodID methodId = env->
GetMethodID
(objClazz,
"
getBytes
"
,
"
(Ljava/lang/String;)[B
"
);
jstring charsetName = env->
NewStringUTF
(
"
UTF-8
"
);
jbyteArray stringJbytes = (jbyteArray)env->
CallObjectMethod
(str, methodId, charsetName);
env->
DeleteLocalRef
(charsetName);
jbyte* pBytes = env->
GetByteArrayElements
(stringJbytes,
NULL
);
const
jsize length = env->
GetArrayLength
(stringJbytes);
std::string
results
((
const
char
*)pBytes, length);
env->
ReleaseByteArrayElements
(stringJbytes, pBytes,
JNI_ABORT
);
env->
DeleteLocalRef
(stringJbytes);
return
results;
}
std::string
javaArrayToString
(JNIEnv *env, jobjectArray arr) {
if
(arr ==
NULL
) {
return
"
(null)
"
;
}
std::ostringstream result;
result <<
"
[
"
;
jsize count = env->
GetArrayLength
(arr);
for
(jsize i=
0
; i<count; i++) {
if
(i !=
0
) {
result <<
"
,
"
;
}
jobject obj = env->
GetObjectArrayElement
(arr, i);
result <<
javaObjectToString
(env, obj);
}
result <<
"
]
"
;
return
result.
str
();
}
std::string
javaObjectToString
(JNIEnv *env, jobject obj) {
if
(obj ==
NULL
) {
return
"
(null)
"
;
}
jclass objClazz = env->
GetObjectClass
(obj);
jmethodID methodId = env->
GetMethodID
(objClazz,
"
toString
"
,
"
()Ljava/lang/String;
"
);
jstring result = (jstring)env->
CallObjectMethod
(obj, methodId);
assertNoException
(env);
return
javaToString
(env, result);
}
std::string
javaMethodCallToString
(JNIEnv *env, jobject obj, jmethodID methodId, jarray args) {
char
temp[
100
];
std::ostringstream result;
sprintf
(temp,
"
%p
"
, env);
result << temp;
result <<
"
:
"
;
result <<
javaObjectToString
(env, obj);
result <<
"
:
"
;
sprintf
(temp,
"
%p
"
, methodId);
result << temp;
result <<
"
: (
"
;
jsize arraySize = env->
GetArrayLength
(args);
for
(
int
i=
0
; i<arraySize; i++) {
if
(i !=
0
) {
result <<
"
,
"
;
}
jobject arg = env->
GetObjectArrayElement
((jobjectArray)args, i);
result <<
javaObjectToString
(env, arg);
}
result <<
"
)
"
;
return
result.
str
();
}
JNIEnv*
javaGetEnv
(JavaVM* jvm, jobject classLoader) {
JNIEnv *env =
NULL
;
int
ret = jvm->
GetEnv
((
void
**)&env,
JNI_BEST_VERSION
);
if
(ret ==
JNI_EDETACHED
) {
JavaVMAttachArgs attachArgs;
attachArgs.
version
=
JNI_BEST_VERSION
;
attachArgs.
name
=
NULL
;
attachArgs.
group
=
NULL
;
jvm->
AttachCurrentThread
((
void
**)&env, &attachArgs);
jclass threadClazz = env->
FindClass
(
"
java/lang/Thread
"
);
jmethodID thread_currentThread = env->
GetStaticMethodID
(threadClazz,
"
currentThread
"
,
"
()Ljava/lang/Thread;
"
);
jmethodID thread_setContextClassLoader = env->
GetMethodID
(threadClazz,
"
setContextClassLoader
"
,
"
(Ljava/lang/ClassLoader;)V
"
);
jobject currentThread = env->
CallStaticObjectMethod
(threadClazz, thread_currentThread);
checkJavaException
(env);
env->
CallObjectMethod
(currentThread, thread_setContextClassLoader, classLoader);
assertNoException
(env);
env->
DeleteLocalRef
(threadClazz);
env->
DeleteLocalRef
(currentThread);
}
return
env;
}
jobject
getSystemClassLoader
(JNIEnv *env) {
jclass threadClazz = env->
FindClass
(
"
java/lang/Thread
"
);
jmethodID thread_currentThread = env->
GetStaticMethodID
(threadClazz,
"
currentThread
"
,
"
()Ljava/lang/Thread;
"
);
jmethodID thread_getContextClassLoader = env->
GetMethodID
(threadClazz,
"
getContextClassLoader
"
,
"
()Ljava/lang/ClassLoader;
"
);
jobject currentThread = env->
CallStaticObjectMethod
(threadClazz, thread_currentThread);
checkJavaException
(env);
jobject result = env->
CallObjectMethod
(currentThread, thread_getContextClassLoader);
checkJavaException
(env);
return
result;
}
jvalueType
javaGetType
(JNIEnv *env, jclass type) {
jclass clazzClazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID class_isArray = env->
GetMethodID
(clazzClazz,
"
isArray
"
,
"
()Z
"
);
jboolean isArray = env->
CallBooleanMethod
(type, class_isArray);
assertNoException
(env);
if
(isArray) {
return
TYPE_ARRAY
;
}
else
{
//
TODO: has to be a better way
std::string str =
javaObjectToString
(env, type);
const
char
*typeStr = str.
c_str
();
//
printf("javaGetType: %s\n", typeStr);
if
(
strcmp
(typeStr,
"
void
"
) ==
0
) {
return
TYPE_VOID
;
}
else
if
(
strcmp
(typeStr,
"
char
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Character
"
) ==
0
) {
return
TYPE_CHAR
;
}
else
if
(
strcmp
(typeStr,
"
int
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Integer
"
) ==
0
) {
return
TYPE_INT
;
}
else
if
(
strcmp
(typeStr,
"
double
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Double
"
) ==
0
) {
return
TYPE_DOUBLE
;
}
else
if
(
strcmp
(typeStr,
"
float
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Float
"
) ==
0
) {
return
TYPE_FLOAT
;
}
else
if
(
strcmp
(typeStr,
"
long
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Long
"
) ==
0
) {
return
TYPE_LONG
;
}
else
if
(
strcmp
(typeStr,
"
boolean
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Boolean
"
) ==
0
) {
return
TYPE_BOOLEAN
;
}
else
if
(
strcmp
(typeStr,
"
short
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Short
"
) ==
0
) {
return
TYPE_SHORT
;
}
else
if
(
strcmp
(typeStr,
"
byte
"
) ==
0
||
strcmp
(typeStr,
"
class java.lang.Byte
"
) ==
0
) {
return
TYPE_BYTE
;
}
else
if
(
strcmp
(typeStr,
"
class java.lang.String
"
) ==
0
) {
return
TYPE_STRING
;
}
return
TYPE_OBJECT
;
}
}
jclass
javaFindClass
(JNIEnv* env, std::string& className) {
std::string searchClassName = className;
std::replace
(searchClassName.
begin
(), searchClassName.
end
(),
'
.
'
,
'
/
'
);
//
Alternate find class trying to fix Class.forName
//
jclass threadClazz = env->FindClass("java/lang/Thread");
//
jmethodID thread_getCurrentThread = env->GetStaticMethodID(threadClazz, "currentThread", "()Ljava/lang/Thread;");
//
jmethodID thread_getContextClassLoader = env->GetMethodID(threadClazz, "getContextClassLoader", "()Ljava/lang/ClassLoader;");
//
//
jclass classLoaderClazz = env->FindClass("java/lang/ClassLoader");
//
jmethodID classLoader_loadClass = env->GetMethodID(classLoaderClazz, "loadClass", "(Ljava/lang/String;)Ljava/lang/Class;");
//
//
jobject currentThread = env->CallObjectMethod(threadClazz, thread_getCurrentThread);
//
jobject classLoader = env->CallObjectMethod(currentThread, thread_getContextClassLoader);
//
jstring searchClassNameJava = env->NewStringUTF(className.c_str());
//
jclass clazz = (jclass)env->CallObjectMethod(classLoader, classLoader_loadClass, searchClassNameJava);
jclass clazz = env->
FindClass
(searchClassName.
c_str
());
return
clazz;
}
jobject
javaFindField
(JNIEnv* env, jclass clazz, std::string& fieldName) {
jobject result =
NULL
;
jclass clazzclazz = env->
GetObjectClass
(clazz);
jclass fieldClazz = env->
FindClass
(
"
java/lang/reflect/Field
"
);
jmethodID field_getName = env->
GetMethodID
(fieldClazz,
"
getName
"
,
"
()Ljava/lang/String;
"
);
jmethodID class_getFields = env->
GetMethodID
(clazzclazz,
"
getFields
"
,
"
()[Ljava/lang/reflect/Field;
"
);
jobjectArray fieldObjects = (jobjectArray)env->
CallObjectMethod
(clazz, class_getFields);
checkJavaException
(env);
jsize fieldCount = env->
GetArrayLength
(fieldObjects);
for
(jsize i=
0
; i<fieldCount; i++) {
jobject field = env->
GetObjectArrayElement
(fieldObjects, i);
jstring fieldNameJava = (jstring)env->
CallObjectMethod
(field, field_getName);
checkJavaException
(env);
std::string itFieldName =
javaToString
(env, fieldNameJava);
if
(
strcmp
(itFieldName.
c_str
(), fieldName.
c_str
()) ==
0
) {
result = field;
break
;
}
}
return
result;
}
const
std::string
kObject
(
"
java/lang/Object
"
);
const
std::string
kString
(
"
java/lang/String
"
);
const
std::string
kInteger
(
"
java/lang/Integer
"
);
const
std::string
kNumber
(
"
java/lang/Number
"
);
const
std::string
kLong
(
"
java/lang/Long
"
);
const
std::string
kDouble
(
"
java/lang/Double
"
);
const
std::string
kBoolean
(
"
java/lang/Boolean
"
);
static
std::string
getArrayElementType
(v8::Local<v8::Array> array,
uint32_t
arraySize) {
std::set<std::string> types;
if
(arraySize ==
0
) {
return
kObject
;
}
for
(
uint32_t
i=
0
; i<arraySize; i++) {
v8::Local<v8::Value> arg = array->
Get
(i);
if
(arg->
IsArray
()) {
return
kObject
;
//
We can exit as soon as we know java/lang/Object is required.
}
else
if
(arg->
IsString
()) {
types.
insert
(
kString
);
}
else
if
(arg->
IsInt32
() || arg->
IsUint32
()) {
types.
insert
(
kInteger
);
}
else
if
(arg->
IsNumber
()) {
types.
insert
(
kDouble
);
}
else
if
(arg->
IsBoolean
()) {
types.
insert
(
kBoolean
);
}
else
if
(arg->
IsObject
()) {
v8::Local<v8::Object> obj = v8::Local<v8::Object>::
Cast
(arg);
v8::Local<v8::Value> isJavaLong =
GetHiddenValue
(obj, Nan::New<v8::String>(
V8_HIDDEN_MARKER_JAVA_LONG
).
ToLocalChecked
());
if
(!isJavaLong.
IsEmpty
() && isJavaLong->
IsBoolean
()) {
types.
insert
(
kLong
);
}
else
{
return
kObject
;
//
We can exit as soon as we know java/lang/Object is required.
}
}
}
if
(types.
size
() ==
1
) {
return
*(types.
begin
());
}
assert
(types.
size
() >=
1
);
assert
(types.
find
(
kObject
)==types.
end
());
//
We have an array with two or more types. All types can be converted to Object, but there is one other
//
case we support, which is when all the types are numeric types.
//
We currently have only two non-numeric types. If neither is present in the set, the rest must be numeric.
if
(types.
find
(
kString
)==types.
end
() && types.
find
(
kBoolean
)==types.
end
()) {
return
kNumber
;
}
return
kObject
;
}
jobject
v8ToJava
(JNIEnv* env, v8::Local<v8::Value> arg) {
if
(arg.
IsEmpty
() || arg->
IsNull
() || arg->
IsUndefined
()) {
return
NULL
;
}
if
(arg->
IsArray
()) {
v8::Local<v8::Array> array = v8::Local<v8::Array>::
Cast
(arg);
uint32_t
arraySize = array->
Length
();
std::string arrayType =
getArrayElementType
(array, arraySize);
jclass objectClazz = env->
FindClass
(arrayType.
c_str
());
jobjectArray result = env->
NewObjectArray
(arraySize, objectClazz,
NULL
);
for
(
uint32_t
i=
0
; i<arraySize; i++) {
jobject val =
v8ToJava
(env, array->
Get
(i));
env->
SetObjectArrayElement
(result, i, val);
}
return
result;
}
if
(arg->
IsString
()) {
v8::String::Value
val
(arg->
ToString
());
return
env->
NewString
(*val, val.
length
());
}
if
(arg->
IsInt32
() || arg->
IsUint32
()) {
jint val = Nan::To<
int32_t
>(arg).
FromJust
();
jclass clazz = env->
FindClass
(
"
java/lang/Integer
"
);
jmethodID constructor = env->
GetMethodID
(clazz,
"
<init>
"
,
"
(I)V
"
);
return
env->
NewObject
(clazz, constructor, val);
}
if
(arg->
IsNumber
()) {
jdouble val = Nan::To<
double
>(arg).
FromJust
();
jclass clazz = env->
FindClass
(
"
java/lang/Double
"
);
jmethodID constructor = env->
GetMethodID
(clazz,
"
<init>
"
,
"
(D)V
"
);
return
env->
NewObject
(clazz, constructor, val);
}
if
(arg->
IsBoolean
()) {
jboolean val = Nan::To<
bool
>(arg).
FromJust
();
jclass clazz = env->
FindClass
(
"
java/lang/Boolean
"
);
jmethodID constructor = env->
GetMethodID
(clazz,
"
<init>
"
,
"
(Z)V
"
);
return
env->
NewObject
(clazz, constructor, val);
}
if
(arg->
IsObject
()) {
v8::Local<v8::Object> obj = v8::Local<v8::Object>::
Cast
(arg);
v8::Local<v8::Value> isJavaObject =
GetHiddenValue
(obj, Nan::New<v8::String>(
V8_HIDDEN_MARKER_JAVA_OBJECT
).
ToLocalChecked
());
if
(!isJavaObject.
IsEmpty
() && isJavaObject->
IsBoolean
()) {
return
v8ToJava_javaObject
(env, obj);
}
v8::Local<v8::Value> isJavaLong =
GetHiddenValue
(obj, Nan::New<v8::String>(
V8_HIDDEN_MARKER_JAVA_LONG
).
ToLocalChecked
());
if
(!isJavaLong.
IsEmpty
() && isJavaLong->
IsBoolean
()) {
return
v8ToJava_javaLong
(env, obj);
}
}
//
TODO: handle other arg types. Don't print here, see instanceof-test#non-java object
//
v8::String::AsciiValue typeStr(arg);
//
printf("v8ToJava: Unhandled type: %s\n", *typeStr);
return
NULL
;
}
jobject
v8ToJava_javaObject
(JNIEnv* env, v8::Local<v8::Object> obj) {
JavaObject* javaObject = Nan::ObjectWrap::Unwrap<JavaObject>(obj);
return
javaObject->
getObject
();
}
void
checkJavaException
(JNIEnv* env) {
if
(env->
ExceptionCheck
()) {
jthrowable ex = env->
ExceptionOccurred
();
env->
ExceptionClear
();
std::string exString =
javaExceptionToString
(env, ex);
printf
(
"
%s
\n
"
, exString.
c_str
());
assert
(
false
);
}
}
jobject
v8ToJava_javaLong
(JNIEnv* env, v8::Local<v8::Object> obj) {
jobject longValue =
v8ToJava
(env, obj->
Get
(Nan::New<v8::String>(
"
longValue
"
).
ToLocalChecked
()));
jclass longClazz = env->
FindClass
(
"
java/lang/Long
"
);
jmethodID long_constructor = env->
GetMethodID
(longClazz,
"
<init>
"
,
"
(Ljava/lang/String;)V
"
);
jobject jobj = env->
NewObject
(longClazz, long_constructor, longValue);
return
jobj;
}
jobjectArray
v8ToJava
(JNIEnv* env, Nan::
NAN_METHOD_ARGS_TYPE
args,
int
start,
int
end) {
jclass clazz = env->
FindClass
(
"
java/lang/Object
"
);
jobjectArray results = env->
NewObjectArray
(end-start, clazz,
NULL
);
for
(
int
i=start; i<end; i++) {
jobject val =
v8ToJava
(env, args[i]);
env->
SetObjectArrayElement
(results, i - start, val);
}
return
results;
}
std::string
javaExceptionToString
(JNIEnv* env, jthrowable ex) {
jclass stringWriterClazz = env->
FindClass
(
"
java/io/StringWriter
"
);
jmethodID stringWriter_constructor = env->
GetMethodID
(stringWriterClazz,
"
<init>
"
,
"
()V
"
);
jmethodID stringWriter_toString = env->
GetMethodID
(stringWriterClazz,
"
toString
"
,
"
()Ljava/lang/String;
"
);
jobject stringWriter = env->
NewObject
(stringWriterClazz, stringWriter_constructor);
jclass printWriterClazz = env->
FindClass
(
"
java/io/PrintWriter
"
);
jmethodID printWriter_constructor = env->
GetMethodID
(printWriterClazz,
"
<init>
"
,
"
(Ljava/io/Writer;)V
"
);
jobject printWriter = env->
NewObject
(printWriterClazz, printWriter_constructor, stringWriter);
jclass throwableClazz = env->
FindClass
(
"
java/lang/Throwable
"
);
jmethodID throwable_printStackTrace = env->
GetMethodID
(throwableClazz,
"
printStackTrace
"
,
"
(Ljava/io/PrintWriter;)V
"
);
env->
CallObjectMethod
(ex, throwable_printStackTrace, printWriter);
checkJavaException
(env);
jstring strObj = (jstring)env->
CallObjectMethod
(stringWriter, stringWriter_toString);
checkJavaException
(env);
return
javaToString
(env, strObj);
}
v8::Local<v8::Value>
javaExceptionToV8
(Java* java, JNIEnv* env, jthrowable ex,
const
std::string& alternateMessage) {
std::ostringstream msg;
msg << alternateMessage;
if
(ex) {
msg <<
"
\n
"
<<
javaExceptionToString
(env, ex);
v8::Local<v8::Value> v8ex =
v8::Exception::Error
(Nan::New<v8::String>(msg.
str
().
c_str
()).
ToLocalChecked
());
((v8::Object*)*v8ex)->
Set
(Nan::New<v8::String>(
"
cause
"
).
ToLocalChecked
(),
javaToV8
(java, env, ex));
return
v8ex;
}
return
v8::Exception::Error
(Nan::New<v8::String>(msg.
str
().
c_str
()).
ToLocalChecked
());
}
v8::Local<v8::Value>
javaExceptionToV8
(Java* java, JNIEnv* env,
const
std::string& alternateMessage) {
jthrowable ex = env->
ExceptionOccurred
();
env->
ExceptionClear
();
return
javaExceptionToV8
(java, env, ex, alternateMessage);
}
jvalueType
javaGetArrayComponentType
(JNIEnv *env, jobjectArray array) {
jclass objectClazz = env->
FindClass
(
"
java/lang/Object
"
);
jclass clazzclazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID object_getClass = env->
GetMethodID
(objectClazz,
"
getClass
"
,
"
()Ljava/lang/Class;
"
);
jobject arrayClass = env->
CallObjectMethod
(array, object_getClass);
assertNoException
(env);
jmethodID class_getComponentType = env->
GetMethodID
(clazzclazz,
"
getComponentType
"
,
"
()Ljava/lang/Class;
"
);
jobject arrayComponentTypeClass = env->
CallObjectMethod
(arrayClass, class_getComponentType);
checkJavaException
(env);
jvalueType arrayComponentType =
javaGetType
(env, (jclass)arrayComponentTypeClass);
return
arrayComponentType;
}
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
v8::Local<v8::ArrayBuffer>
newArrayBuffer
(
void
* elems,
size_t
length) {
v8::Local<v8::ArrayBuffer> ab =
v8::ArrayBuffer::New
(
v8::Isolate::GetCurrent
(), length);
memcpy
(ab->
GetContents
().
Data
(), elems, length);
return
ab;
}
#
endif
v8::Local<v8::String>
javaCharToV8String
(jchar c) {
#
if
((NODE_MAJOR_VERSION == 0) && (NODE_MINOR_VERSION <= 10))
return
v8::String::New
(&c,
1
);
#
elif
((NODE_MAJOR_VERSION == 0) && (NODE_MINOR_VERSION <= 12))
return
v8::String::NewFromTwoByte
(
v8::Isolate::GetCurrent
(), &c, v8::String::
kNormalString
,
1
);
#
else
return
v8::String::NewFromTwoByte
(
v8::Isolate::GetCurrent
(), &c, v8::NewStringType::
kNormal
,
1
).
ToLocalChecked
();
#
endif
}
v8::Local<v8::Value>
javaArrayToV8
(Java* java, JNIEnv* env, jobjectArray objArray) {
if
(objArray ==
NULL
) {
return
Nan::Null
();
}
jvalueType arrayComponentType =
javaGetArrayComponentType
(env, objArray);
//
printf("javaArrayToV8: %d %s\n", arrayComponentType, javaObjectToString(env, objArray).c_str());
jsize arraySize = env->
GetArrayLength
(objArray);
//
printf("array size: %d\n", arraySize);
v8::Local<v8::Array> result = Nan::New<v8::Array>(arraySize);
//
http://docs.oracle.com/javase/7/docs/technotes/guides/jni/spec/types.html
switch
(arrayComponentType) {
case
TYPE_CHAR
:
{
jchar* elems = env->
GetCharArrayElements
((jcharArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize *
2
;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseCharArrayElements
((jcharArray)objArray, elems,
0
);
return
v8::Uint16Array::New
(ab,
0
, arraySize);
#
else
jchar str;
for
(jsize i=
0
; i<arraySize; i++) {
str = elems[i];
result->
Set
(i,
javaCharToV8String
(str));
}
env->
ReleaseCharArrayElements
((jcharArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_INT
:
{
jint* elems = env->
GetIntArrayElements
((jintArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize *
4
;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseIntArrayElements
((jintArray)objArray, elems,
0
);
return
v8::Int32Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Integer>(elems[i]));
}
env->
ReleaseIntArrayElements
((jintArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_BYTE
:
{
jbyte* elems = env->
GetByteArrayElements
((jbyteArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseByteArrayElements
((jbyteArray)objArray, elems,
0
);
return
v8::Int8Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Number>(elems[i]));
}
env->
ReleaseByteArrayElements
((jbyteArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_BOOLEAN
:
{
jboolean* elems = env->
GetBooleanArrayElements
((jbooleanArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseBooleanArrayElements
((jbooleanArray)objArray, elems,
0
);
return
v8::Uint8Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Boolean>(elems[i]));
}
env->
ReleaseBooleanArrayElements
((jbooleanArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_SHORT
:
{
jshort* elems = env->
GetShortArrayElements
((jshortArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize *
2
;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseShortArrayElements
((jshortArray)objArray, elems,
0
);
return
v8::Int16Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Number>(elems[i]));
}
env->
ReleaseShortArrayElements
((jshortArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_DOUBLE
:
{
jdouble* elems = env->
GetDoubleArrayElements
((jdoubleArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize *
8
;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseDoubleArrayElements
((jdoubleArray)objArray, elems,
0
);
return
v8::Float64Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Number>(elems[i]));
}
env->
ReleaseDoubleArrayElements
((jdoubleArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_FLOAT
:
{
jfloat* elems = env->
GetFloatArrayElements
((jfloatArray)objArray,
0
);
#
if
(NODE_VERSION_AT_LEAST(4, 0, 0))
size_t
byteLength = arraySize *
4
;
v8::Local<v8::ArrayBuffer> ab =
newArrayBuffer
(elems, byteLength);
env->
ReleaseFloatArrayElements
((jfloatArray)objArray, elems,
0
);
return
v8::Float32Array::New
(ab,
0
, arraySize);
#
else
for
(jsize i=
0
; i<arraySize; i++) {
result->
Set
(i, Nan::New<v8::Number>(elems[i]));
}
env->
ReleaseFloatArrayElements
((jfloatArray)objArray, elems,
0
);
#
endif
}
break
;
case
TYPE_LONG
:
{
jlong* elems = env->
GetLongArrayElements
((jlongArray)objArray,
0
);
for
(jsize i=
0
; i<arraySize; i++) {
jobject obj =
longToJavaLongObj
(env, elems[i]);
result->
Set
(i,
JavaObject::New
(java, obj));
}
env->
ReleaseLongArrayElements
((jlongArray)objArray, elems,
0
);
}
break
;
default
:
for
(jsize i=
0
; i<arraySize; i++) {
jobject obj = env->
GetObjectArrayElement
(objArray, i);
v8::Handle<v8::Value> item =
javaToV8
(java, env, obj);
result->
Set
(i, item);
}
break
;
}
return
result;
}
v8::Local<v8::Value>
javaToV8
(Java* java, JNIEnv* env, jobject obj) {
return
javaToV8
(java, env, obj,
NULL
);
}
v8::Local<v8::Value>
javaToV8
(Java* java, JNIEnv* env, jobject obj, DynamicProxyData* dynamicProxyData) {
if
(obj ==
NULL
) {
return
Nan::Null
();
}
jclass objClazz = env->
GetObjectClass
(obj);
jvalueType resultType =
javaGetType
(env, objClazz);
//
printf("javaToV8: %d %s\n", resultType, javaObjectToString(env, obj).c_str());
switch
(resultType) {
case
TYPE_ARRAY
:
{
v8::Local<v8::Value> result =
javaArrayToV8
(java, env, (jobjectArray)obj);
return
result;
}
case
TYPE_VOID
:
return
Nan::Undefined
();
case
TYPE_CHAR
:
{
jclass charClazz = env->
FindClass
(
"
java/lang/Character
"
);
jmethodID char_charValue = env->
GetMethodID
(charClazz,
"
charValue
"
,
"
()C
"
);
jchar c = env->
CallCharMethod
(obj, char_charValue);
checkJavaException
(env);
return
javaCharToV8String
(c);
}
case
TYPE_BOOLEAN
:
{
jclass booleanClazz = env->
FindClass
(
"
java/lang/Boolean
"
);
jmethodID boolean_booleanValue = env->
GetMethodID
(booleanClazz,
"
booleanValue
"
,
"
()Z
"
);
bool
result = env->
CallBooleanMethod
(obj, boolean_booleanValue);
assertNoException
(env);
return
Nan::New<v8::Boolean>(result);
}
case
TYPE_BYTE
:
{
jclass byteClazz = env->
FindClass
(
"
java/lang/Byte
"
);
jmethodID byte_byteValue = env->
GetMethodID
(byteClazz,
"
byteValue
"
,
"
()B
"
);
jbyte result = env->
CallByteMethod
(obj, byte_byteValue);
checkJavaException
(env);
return
Nan::New<v8::Number>(result);
}
case
TYPE_LONG
:
{
jclass longClazz = env->
FindClass
(
"
java/lang/Long
"
);
jmethodID long_longValue = env->
GetMethodID
(longClazz,
"
longValue
"
,
"
()J
"
);
jlong result = env->
CallLongMethod
(obj, long_longValue);
checkJavaException
(env);
std::string strValue =
javaObjectToString
(env, obj);
v8::Local<v8::Value> v8Result = Nan::New<v8::NumberObject>((
double
)result);
v8::NumberObject* v8ResultNumberObject =
v8::NumberObject::Cast
(*v8Result);
v8ResultNumberObject->
Set
(Nan::New<v8::String>(
"
longValue
"
).
ToLocalChecked
(), Nan::New<v8::String>(strValue.
c_str
()).
ToLocalChecked
());
SetHiddenValue
(v8ResultNumberObject, Nan::New<v8::String>(
V8_HIDDEN_MARKER_JAVA_LONG
).
ToLocalChecked
(), Nan::New<v8::Boolean>(
true
));
return
v8Result;
}
case
TYPE_INT
:
{
jclass integerClazz = env->
FindClass
(
"
java/lang/Integer
"
);
jmethodID integer_intValue = env->
GetMethodID
(integerClazz,
"
intValue
"
,
"
()I
"
);
jint result = env->
CallIntMethod
(obj, integer_intValue);
checkJavaException
(env);
return
Nan::New<v8::Integer>(result);
}
case
TYPE_SHORT
:
{
jclass shortClazz = env->
FindClass
(
"
java/lang/Short
"
);
jmethodID short_shortValue = env->
GetMethodID
(shortClazz,
"
shortValue
"
,
"
()S
"
);
jshort result = env->
CallShortMethod
(obj, short_shortValue);
assertNoException
(env);
return
Nan::New<v8::Integer>(result);
}
case
TYPE_DOUBLE
:
{
jclass doubleClazz = env->
FindClass
(
"
java/lang/Double
"
);
jmethodID double_doubleValue = env->
GetMethodID
(doubleClazz,
"
doubleValue
"
,
"
()D
"
);
jdouble result = env->
CallDoubleMethod
(obj, double_doubleValue);
checkJavaException
(env);
return
Nan::New<v8::Number>(result);
}
case
TYPE_FLOAT
:
{
jclass floatClazz = env->
FindClass
(
"
java/lang/Float
"
);
jmethodID float_floatValue = env->
GetMethodID
(floatClazz,
"
floatValue
"
,
"
()F
"
);
jfloat result = env->
CallFloatMethod
(obj, float_floatValue);
assertNoException
(env);
return
Nan::New<v8::Number>(result);
}
case
TYPE_STRING
:
{
std::string str =
javaObjectToString
(env, obj);
return
Nan::New<v8::String>(str.
c_str
(), str.
length
()).
ToLocalChecked
();
}
case
TYPE_OBJECT
:
if
(dynamicProxyData !=
NULL
) {
return
JavaProxyObject::New
(java, obj, dynamicProxyData);
}
return
JavaObject::New
(java, obj);
default
:
printf
(
"
javaToV8: unhandled type: 0x%03x
\n
"
, resultType);
return
JavaObject::New
(java, obj);
}
return
Nan::Undefined
();
}
jobjectArray
javaObjectArrayToClasses
(JNIEnv *env, jobjectArray objs) {
jclass clazzClazz = env->
FindClass
(
"
java/lang/Class
"
);
jsize objsLength = env->
GetArrayLength
(objs);
jobjectArray results = env->
NewObjectArray
(objsLength, clazzClazz,
NULL
);
for
(jsize i=
0
; i<objsLength; i++) {
jobject elem = env->
GetObjectArrayElement
(objs, i);
if
(elem ==
NULL
) {
env->
SetObjectArrayElement
(results, i,
NULL
);
}
else
{
jclass objClazz = env->
GetObjectClass
(elem);
env->
SetObjectArrayElement
(results, i, objClazz);
}
}
return
results;
}
jobject
javaFindMethod
(JNIEnv *env, jclass clazz, std::string& methodName, jobjectArray methodArgs) {
std::string::size_type parenLoc = methodName.
find
(
"
(
"
);
if
(parenLoc != std::string::npos) {
jobject method =
NULL
;
std::string methodSig = methodName.
substr
(parenLoc);
methodName = methodName.
substr
(
0
, parenLoc);
jmethodID methodID = env->
GetStaticMethodID
(clazz, methodName.
c_str
(), methodSig.
c_str
());
if
(methodID !=
0
) {
method = env->
ToReflectedMethod
(clazz, methodID,
true
);
}
else
{
methodID = env->
GetMethodID
(clazz, methodName.
c_str
(), methodSig.
c_str
());
if
(methodID !=
0
) {
method = env->
ToReflectedMethod
(clazz, methodID,
true
);
}
}
env->
ExceptionClear
();
//
If GetStaticMethodID can't find the method it throws an exception and we need to just return NULL
//
cast arguments
if
(method !=
NULL
) {
javaCastArguments
(env, methodArgs, method);
}
return
method;
}
else
{
jclass methodUtilsClazz = env->
FindClass
(
"
nodejava/org/apache/commons/lang3/reflect/MethodUtils
"
);
jmethodID methodUtils_getMatchingAccessibleMethod = env->
GetStaticMethodID
(methodUtilsClazz,
"
getMatchingAccessibleMethod
"
,
"
(Ljava/lang/Class;Ljava/lang/String;[Ljava/lang/Class;)Ljava/lang/reflect/Method;
"
);
const
char
*methodNameCStr = methodName.
c_str
();
jstring methodNameJavaStr = env->
NewStringUTF
(methodNameCStr);
jobjectArray methodArgClasses =
javaObjectArrayToClasses
(env, methodArgs);
jobject method = env->
CallStaticObjectMethod
(methodUtilsClazz, methodUtils_getMatchingAccessibleMethod, clazz, methodNameJavaStr, methodArgClasses);
checkJavaException
(env);
return
method;
}
}
void
javaCastArguments
(JNIEnv *env, jobjectArray methodArgs, jobject method) {
jclass castingUtilsClazz = env->
FindClass
(
"
node/CastingUtils
"
);
jmethodID castingUtilsClazz_cast = env->
GetStaticMethodID
(castingUtilsClazz,
"
cast
"
,
"
(Ljava/lang/reflect/Method;[Ljava/lang/Object;)V
"
);
env->
CallStaticObjectMethod
(castingUtilsClazz, castingUtilsClazz_cast, method, methodArgs);
}
jobject
javaFindConstructor
(JNIEnv *env, jclass clazz, jobjectArray methodArgs) {
jclass constructorUtilsClazz = env->
FindClass
(
"
nodejava/org/apache/commons/lang3/reflect/ConstructorUtils
"
);
jmethodID constructorUtils_getMatchingAccessibleConstructor = env->
GetStaticMethodID
(constructorUtilsClazz,
"
getMatchingAccessibleConstructor
"
,
"
(Ljava/lang/Class;[Ljava/lang/Class;)Ljava/lang/reflect/Constructor;
"
);
jobjectArray methodArgClasses =
javaObjectArrayToClasses
(env, methodArgs);
jobject method = env->
CallStaticObjectMethod
(constructorUtilsClazz, constructorUtils_getMatchingAccessibleConstructor, clazz, methodArgClasses);
assertNoException
(env);
return
method;
}
jobject
longToJavaLongObj
(JNIEnv *env, jlong val) {
jclass longClass = env->
FindClass
(
"
java/lang/Long
"
);
jmethodID constructor = env->
GetMethodID
(longClass,
"
<init>
"
,
"
(J)V
"
);
jobject result = env->
NewObject
(longClass, constructor, val);
return
result;
}
int
dynamicProxyDataVerify
(DynamicProxyData* data) {
if
(data->
markerStart
==
DYNAMIC_PROXY_DATA_MARKER_START
&& data->
markerEnd
==
DYNAMIC_PROXY_DATA_MARKER_END
) {
return
1
;
}
printf
(
"
*** ERROR: Lost reference to the dynamic proxy. You must maintain a reference in javascript land using ref() and unref(). (%p) ***
\n
"
, data);
return
0
;
}
std::string
methodNotFoundToString
(JNIEnv *env, jclass clazz, std::string methodName,
bool
constructor, Nan::
NAN_METHOD_ARGS_TYPE
args,
int
argStart,
int
argEnd) {
std::ostringstream startOfMessage;
std::ostringstream msg;
jclass classClazz = env->
FindClass
(
"
java/lang/Class
"
);
jmethodID class_getName = env->
GetMethodID
(classClazz,
"
getName
"
,
"
()Ljava/lang/String;
"
);
startOfMessage <<
"
Could not find method
\"
"
<< methodName.
c_str
() <<
"
(
"
;
for
(
int
i=argStart; i<argEnd; i++) {
jobject val =
v8ToJava
(env, args[i]);
if
(i != argStart) {
startOfMessage <<
"
,
"
;
}
if
(val ==
NULL
) {
startOfMessage <<
"
(null)
"
;
}
else
{
jclass argClass = env->
GetObjectClass
(val);
jstring argClassNameJava = (jstring)env->
CallObjectMethod
(argClass, class_getName);
checkJavaException
(env);
std::string argClassName =
javaToString
(env, argClassNameJava);
startOfMessage << argClassName;
}
}
startOfMessage <<
"
)
\"
on class
\"
"
<<
javaObjectToString
(env, clazz).
c_str
() <<
"
\"
.
"
;
msg << startOfMessage.
str
() <<
"
Possible matches:
\n
"
;
jclass memberClazz = env->
FindClass
(
"
java/lang/reflect/Member
"
);
jmethodID member_getName = env->
GetMethodID
(memberClazz,
"
getName
"
,
"
()Ljava/lang/String;
"
);
std::list<jobject> methods;
if
(constructor) {
javaReflectionGetConstructors
(env, clazz, &methods);
}
else
{
javaReflectionGetMethods
(env, clazz, &methods,
true
);
}
int
count =
0
;
for
(std::list<jobject>::iterator it = methods.
begin
(); it != methods.
end
(); ++it) {
jstring methodNameTestJava = (jstring)env->
CallObjectMethod
(*it, member_getName);
assertNoException
(env);
std::string methodNameTest =
javaToString
(env, methodNameTestJava);
if
(methodNameTest == methodName) {
msg <<
"
"
<<
javaObjectToString
(env, *it).
c_str
() <<
"
\n
"
;
count++;
}
}
if
(count ==
0
) {
std::ostringstream noMethodsMsg;
noMethodsMsg << startOfMessage.
str
() <<
"
No methods with that name.
"
;
return
noMethodsMsg.
str
();
}
return
msg.
str
();
}
void
unref
(DynamicProxyData* dynamicProxyData) {
if
(!
dynamicProxyDataVerify
(dynamicProxyData)) {
return
;
}
dynamicProxyData->
jsObject
.
Reset
();
dynamicProxyData->
functions
.
Reset
();
dynamicProxyData->
markerStart
=
0
;
dynamicProxyData->
markerEnd
=
0
;
delete
dynamicProxyData;
}
jarray
javaGetArgsForMethod
(JNIEnv *env, jobject method, jarray args) {
jclass varArgsClazz = env->
FindClass
(
"
node/VarArgs
"
);
jmethodID method_getVarArgs = env->
GetStaticMethodID
(varArgsClazz,
"
getVarArgs
"
,
"
(Ljava/lang/reflect/Method;[Ljava/lang/Object;)[Ljava/lang/Object;
"
);
jarray result = (jarray)env->
CallStaticObjectMethod
(varArgsClazz, method_getVarArgs, method, args);
checkJavaException
(env);
return
result;
}
jarray
javaGetArgsForConstructor
(JNIEnv *env, jobject method, jarray args) {
jclass varArgsClazz = env->
FindClass
(
"
node/VarArgs
"
);
jmethodID method_getVarArgs = env->
GetStaticMethodID
(varArgsClazz,
"
getVarArgs
"
,
"
(Ljava/lang/reflect/Constructor;[Ljava/lang/Object;)[Ljava/lang/Object;
"
);
jarray result = (jarray)env->
CallStaticObjectMethod
(varArgsClazz, method_getVarArgs, method, args);
checkJavaException
(env);
return
result;
}
#
if
(NODE_MODULE_VERSION > 48)
//
The two methods below were copied from
//
https://github.com/electron/electron?branch=master&filepath=atom/common/api/atom_api_v8_util.cc
//
Copyright (c) 2013 GitHub, Inc.
//
Use of this source code is governed by the MIT license.
v8::Local<v8::Value>
GetHiddenValue
(v8::Local<v8::Object> object, v8::Local<v8::String> key) {
v8::Local<v8::Context> context =
v8::Isolate::GetCurrent
()->
GetCurrentContext
();
v8::Local<v8::Private> privateKey =
v8::Private::ForApi
(
v8::Isolate::GetCurrent
(), key);
v8::Local<v8::Value> value;
v8::Maybe<
bool
> result = object->
HasPrivate
(context, privateKey);
if
(!(result.
IsJust
() && result.
FromJust
()))
return
v8::Local<v8::Value>();
if
(object->
GetPrivate
(context, privateKey).
ToLocal
(&value))
return
value;
return
v8::Local<v8::Value>();
}
void
SetHiddenValue
(v8::NumberObject* object, v8::Local<v8::String> key, v8::Local<v8::Value> value) {
if
(value.
IsEmpty
())
return
;
v8::Local<v8::Context> context =
v8::Isolate::GetCurrent
()->
GetCurrentContext
();
v8::Local<v8::Private> privateKey =
v8::Private::ForApi
(
v8::Isolate::GetCurrent
(), key);
object->
SetPrivate
(context, privateKey, value);
}
void
SetHiddenValue
(v8::Local<v8::Object> object, v8::Local<v8::String> key, v8::Local<v8::Value> value) {
if
(value.
IsEmpty
())
return
;
v8::Local<v8::Context> context =
v8::Isolate::GetCurrent
()->
GetCurrentContext
();
v8::Local<v8::Private> privateKey =
v8::Private::ForApi
(
v8::Isolate::GetCurrent
(), key);
object->
SetPrivate
(context, privateKey, value);
}
#
else
v8::Local<v8::Value>
GetHiddenValue
(v8::Local<v8::Object> object, v8::Local<v8::String> key) {
return
object->
GetHiddenValue
(key);
}
void
SetHiddenValue
(v8::NumberObject* object, v8::Local<v8::String> key, v8::Local<v8::Value> value) {
object->
SetHiddenValue
(key, value);
}
void
SetHiddenValue
(v8::Local<v8::Object> object, v8::Local<v8::String> key, v8::Local<v8::Value> value) {
object->
SetHiddenValue
(key, value);
}
#
endif
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