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vtkJavaUtil.cxx
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vtkJavaUtil.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkJavaUtil.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#ifdef _INTEGRAL_MAX_BITS
#undef _INTEGRAL_MAX_BITS
#endif
#define _INTEGRAL_MAX_BITS 64
#include "vtkObject.h"
#include "vtkDebugLeaks.h"
#include "vtkWindows.h"
#include "vtkJavaUtil.h"
// Silence warning like
// "dereferencing type-punned pointer will break strict-aliasing rules"
// it happens because this kind of expression: (void **)(&e)
#if defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
#endif
JNIEXPORT jlong vtkJavaGetId(JNIEnv *env,jobject obj)
{
jfieldID id;
jlong result;
id = env->GetFieldID(env->GetObjectClass(obj),"vtkId","J");
result = env->GetLongField(obj,id);
return result;
}
JNIEXPORT void *vtkJavaGetPointerFromObject(JNIEnv *env, jobject obj)
{
return obj ? (void*)(size_t)vtkJavaGetId(env, obj) : 0;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfDoubleFromDouble(JNIEnv *env, double *ptr, int size)
{
jdoubleArray ret;
int i;
jdouble *array;
ret = env->NewDoubleArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetDoubleArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseDoubleArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfDoubleFromFloat(JNIEnv *env, float *ptr, int size)
{
jdoubleArray ret;
int i;
jdouble *array;
ret = env->NewDoubleArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetDoubleArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseDoubleArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfIntFromInt(JNIEnv *env, int *ptr, int size)
{
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfIntFromIdType(JNIEnv *env, vtkIdType *ptr, int size)
{
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = (int)ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfIntFromLongLong(JNIEnv *env, long long *ptr, int size)
{
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = (int)ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfIntFromSignedChar(JNIEnv *env, signed char *ptr, int size)
{
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = (int)ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfFloatFromFloat(JNIEnv *env, float *ptr, int size)
{
jfloatArray ret;
int i;
jfloat *array;
ret = env->NewFloatArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetFloatArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseFloatArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfShortFromShort(JNIEnv *env, short *ptr, int size)
{
jshortArray ret;
int i;
jshort *array;
ret = env->NewShortArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetShortArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseShortArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfByteFromUnsignedChar(JNIEnv *env, unsigned char *ptr, int size)
{
jbyteArray ret;
int i;
jbyte *array;
ret = env->NewByteArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetByteArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseByteArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfLongFromLong(JNIEnv *env, long *ptr, int size)
{
cout.flush();
jlongArray ret;
int i;
jlong *array;
ret = env->NewLongArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetLongArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseLongArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfUnsignedLongFromUnsignedLong(JNIEnv *env,unsigned long *ptr,int size)
{
cout.flush();
jlongArray ret;
int i;
jlong *array;
ret = env->NewLongArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetLongArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseLongArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfUnsignedShortFromUnsignedShort(JNIEnv *env,unsigned short *ptr,int size)
{
cout.flush();
jshortArray ret;
int i;
jshort *array;
ret = env->NewShortArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetShortArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseShortArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfUnsignedCharFromUnsignedChar(JNIEnv *env,unsigned char *ptr,int size)
{
cout.flush();
jbyteArray ret;
int i;
jbyte *array;
ret = env->NewByteArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetByteArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseByteArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfUnsignedIntFromUnsignedInt(JNIEnv *env,unsigned int *ptr,int size)
{
cout.flush();
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfCharFromChar(JNIEnv *env, char *ptr, int size)
{
cout.flush();
jcharArray ret;
int i;
jchar *array;
ret = env->NewCharArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetCharArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseCharArrayElements(ret,array,0);
return ret;
}
JNIEXPORT jarray vtkJavaMakeJArrayOfIntFromBool(JNIEnv *env, bool *ptr,int size)
{
cout.flush();
jintArray ret;
int i;
jint *array;
ret = env->NewIntArray(size);
if (ret == 0)
{
// should throw an exception here
return 0;
}
array = env->GetIntArrayElements(ret,NULL);
// copy the data
for (i = 0; i < size; i++)
{
array[i] = ptr[i];
}
env->ReleaseIntArrayElements(ret,array,0);
return ret;
}
// http://java.sun.com/docs/books/jni/html/pitfalls.html#12400
static void JNU_ThrowByName(JNIEnv *env, const char *name, const char *msg)
{
jclass cls = env->FindClass(name);
/* if cls is NULL, an exception has already been thrown */
if (cls != NULL) {
env->ThrowNew(cls, msg);
}
/* free the local ref */
env->DeleteLocalRef(cls);
}
static char *JNU_GetStringNativeChars(JNIEnv *env, jstring jstr)
{
if (jstr == NULL) {
return NULL;
}
jbyteArray bytes = 0;
jthrowable exc;
char *result = 0;
if (env->EnsureLocalCapacity(2) < 0) {
return 0; /* out of memory error */
}
jclass Class_java_lang_String = env->FindClass("java/lang/String");
jmethodID MID_String_getBytes = env->GetMethodID(
Class_java_lang_String, "getBytes", "()[B");
bytes = (jbyteArray) env->CallObjectMethod(jstr,
MID_String_getBytes);
exc = env->ExceptionOccurred();
if (!exc) {
jint len = env->GetArrayLength(bytes);
result = new char [len + 1];
if (result == 0) {
JNU_ThrowByName(env, "java/lang/OutOfMemoryError",
0);
env->DeleteLocalRef(bytes);
return 0;
}
env->GetByteArrayRegion(bytes, 0, len,
(jbyte *)result);
result[len] = 0; /* NULL-terminate */
} else {
env->DeleteLocalRef(exc);
}
env->DeleteLocalRef(bytes);
return result;
}
JNIEXPORT char *vtkJavaUTFToChar(JNIEnv *env, jstring in)
{
return JNU_GetStringNativeChars(env, in);
}
JNIEXPORT bool vtkJavaUTFToString(JNIEnv *env, jstring in, std::string &out)
{
const char *cstring = JNU_GetStringNativeChars(env, in);
if( cstring )
{
out = cstring;
delete[] cstring;
return true;
}
return false;
}
JNIEXPORT jstring vtkJavaMakeJavaString(JNIEnv *env, const char *in)
{
if (!in) {
return env->NewStringUTF("");
} else {
return env->NewStringUTF(in);
}
}
//**jcp this is the callback inteface stub for Java. no user parms are passed
//since the callback must be a method of a class. We make the rash assumption
//that the <this> pointer will anchor any required other elements for the
//called functions. - edited by km
JNIEXPORT void vtkJavaVoidFunc(void* f)
{
vtkJavaVoidFuncArg *iprm = (vtkJavaVoidFuncArg *)f;
// make sure we have a valid method ID
if (iprm->mid)
{
JNIEnv *e;
// it should already be atached
#ifdef JNI_VERSION_1_2
iprm->vm->AttachCurrentThread((void **)(&e),NULL);
#else
iprm->vm->AttachCurrentThread((JNIEnv_**)(&e),NULL);
#endif
e->CallVoidMethod(iprm->uobj,iprm->mid,NULL);
}
}
JNIEXPORT void vtkJavaVoidFuncArgDelete(void* arg)
{
vtkJavaVoidFuncArg *arg2;
arg2 = (vtkJavaVoidFuncArg *)arg;
JNIEnv *e;
// it should already be atached
#ifdef JNI_VERSION_1_2
arg2->vm->AttachCurrentThread((void **)(&e),NULL);
#else
arg2->vm->AttachCurrentThread((JNIEnv_**)(&e),NULL);
#endif
// free the structure
e->DeleteGlobalRef(arg2->uobj);
delete arg2;
}
vtkJavaCommand::vtkJavaCommand()
{
this->vm = NULL;
}
vtkJavaCommand::~vtkJavaCommand()
{
JNIEnv *e;
// it should already be atached
#ifdef JNI_VERSION_1_2
this->vm->AttachCurrentThread((void **)(&e),NULL);
#else
this->vm->AttachCurrentThread((JNIEnv_**)(&e),NULL);
#endif
// free the structure
e->DeleteGlobalRef(this->uobj);
}
void vtkJavaCommand::Execute(vtkObject *, unsigned long, void *)
{
// make sure we have a valid method ID
if (this->mid)
{
JNIEnv *e;
// it should already be atached
#ifdef JNI_VERSION_1_2
this->vm->AttachCurrentThread((void **)(&e),NULL);
#else
this->vm->AttachCurrentThread((JNIEnv_**)(&e),NULL);
#endif
e->CallVoidMethod(this->uobj,this->mid,NULL);
}
}