1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*=========================================================================
Program: Visualization Toolkit
Module: vtkX3DExporterJavaHelper.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.
=========================================================================*/
#include "vtkX3DExporterJavaHelper.h"
#include "vtkObjectFactory.h"
#include <jni.h>
//----------------------------------------------------------------------------
vtkStandardNewMacro(vtkX3DExporterJavaHelper);
//----------------------------------------------------------------------------
void vtkX3DExporterJavaHelper::SetFastInfosetJarLocation(const char* location)
{
delete [] vtkX3DExporterJavaHelper::FastInfosetJarLocation;
vtkX3DExporterJavaHelper::FastInfosetJarLocation = 0;
if ( location )
{
vtkX3DExporterJavaHelper::FastInfosetJarLocation = new char[ strlen(location) + 1 ];
strcpy(vtkX3DExporterJavaHelper::FastInfosetJarLocation, location);
}
}
char* vtkX3DExporterJavaHelper::FastInfosetJarLocation = 0;
//----------------------------------------------------------------------------
#define vtkX3DCheckJNIObject(str, className) \
if ( !className ) \
{\
cerr << "Cannot find required " << str << ": " << #className << endl; \
}
//----------------------------------------------------------------------------
class vtkX3DExporterJavaHelperInternal
{
public:
vtkX3DExporterJavaHelperInternal() :
JavaVirtualMachine(0), JavaEnvironment(0), X3DBinaryConverterClass_Write(0),
X3DBinaryConverterClass_Close(0), X3DBinaryConverterObject(0)
{
}
JavaVM* JavaVirtualMachine;
JNIEnv* JavaEnvironment;
jmethodID X3DBinaryConverterClass_Write;
jmethodID X3DBinaryConverterClass_Close;
jobject X3DBinaryConverterObject;
jcharArray ConvertToJChar(JNIEnv* env, const char* message)
{
const size_t len = strlen(message);
jcharArray array = env->NewCharArray(len);
jchar *jarray = env->GetCharArrayElements(array,NULL);
size_t cc;
for ( cc = 0; cc < len; ++ cc )
{
jarray[cc] = message[cc];
}
env->ReleaseCharArrayElements(array,jarray,0);
return array;
}
jobject CreateString(JNIEnv* env, const char* message)
{
jclass java_lang_String = env->FindClass("java/lang/String");
jmethodID java_lang_String_Constructor_From_Array = env->GetMethodID(java_lang_String,
"<init>", "([C)V");
jcharArray inputFileNameArray = this->ConvertToJChar(env, message);
jobject inputFileNameString = env->NewObject(
java_lang_String, java_lang_String_Constructor_From_Array, inputFileNameArray);
env->DeleteLocalRef(inputFileNameArray);
return inputFileNameString;
}
};
//----------------------------------------------------------------------------
vtkX3DExporterJavaHelper::vtkX3DExporterJavaHelper()
{
this->Internal = new vtkX3DExporterJavaHelperInternal;
JavaVM* VMs;
jsize numVMs = 0;
jint status = JNI_GetCreatedJavaVMs(&VMs, 10, &numVMs);
if ( numVMs > 0 )
{
this->Internal->JavaVirtualMachine = VMs;
status = this->Internal->JavaVirtualMachine->GetEnv(
(void**)&this->Internal->JavaEnvironment, JNI_VERSION_1_2);
if ( status != 0 )
{
vtkErrorMacro("Cannot attach to the Java Virtual Machine");
delete this->Internal;
return;
}
}
if ( !this->Internal->JavaEnvironment )
{
JavaVMInitArgs args;
JavaVMOption options[1];
//status = JNI_GetDefaultJavaVMInitArgs(&vm_args);
/* There is a new JNI_VERSION_1_4, but it doesn't add anything for the purposes of our example. */
args.version = JNI_VERSION_1_2;
args.nOptions = 1;
std::string str;
if ( vtkX3DExporterJavaHelper::FastInfosetJarLocation )
{
str = "-Djava.class.path=";
str += vtkX3DExporterJavaHelper::FastInfosetJarLocation;
}
else
{
str = "-Djava.class.path=FastInfoset.jar";
}
char* classPath = new char[str.size()+1];
strcpy(classPath, str.c_str());
options[0].optionString = classPath;
args.options = options;
args.ignoreUnrecognized = JNI_FALSE;
jint res = JNI_CreateJavaVM(&this->Internal->JavaVirtualMachine, (void **)&this->Internal->JavaEnvironment, &args);
delete [] classPath;
if ( res != 0 )
{
vtkErrorMacro("Cannot create VM: " << res);
delete this->Internal;
return;
}
}
vtkX3DCheckJNIObject("VM", this->Internal->JavaEnvironment);
}
//----------------------------------------------------------------------------
vtkX3DExporterJavaHelper::~vtkX3DExporterJavaHelper()
{
if ( this->Internal )
{
//this->Internal->JavaVirtualMachine->DestroyJavaVM();
delete this->Internal;
}
}
//----------------------------------------------------------------------------
int vtkX3DExporterJavaHelper::OpenFile(const char* fileName)
{
if ( !this->Internal )
{
return 0;
}
jclass x3dConverterClass = this->Internal->JavaEnvironment->FindClass("vtkX3DBinaryConverter");
vtkX3DCheckJNIObject("Class", x3dConverterClass);
jmethodID constructorId = this->Internal->JavaEnvironment->GetMethodID(
x3dConverterClass, "<init>", "(Ljava/lang/String;)V");
vtkX3DCheckJNIObject("Constructor", constructorId);
this->Internal->X3DBinaryConverterClass_Write = this->Internal->JavaEnvironment->GetMethodID(
x3dConverterClass, "Write", "([B)V");
vtkX3DCheckJNIObject("Write Method", this->Internal->X3DBinaryConverterClass_Write);
this->Internal->X3DBinaryConverterClass_Close = this->Internal->JavaEnvironment->GetMethodID(
x3dConverterClass, "Close", "()V");
vtkX3DCheckJNIObject("Close Method", this->Internal->X3DBinaryConverterClass_Close);
jobject outputFileName = this->Internal->CreateString(this->Internal->JavaEnvironment, fileName);
vtkX3DCheckJNIObject("File Name String", outputFileName);
this->Internal->X3DBinaryConverterObject = this->Internal->JavaEnvironment->NewObject(
x3dConverterClass, constructorId, outputFileName);
vtkX3DCheckJNIObject("X3D Converter Object", this->Internal->X3DBinaryConverterObject);
return 1;
}
//----------------------------------------------------------------------------
int vtkX3DExporterJavaHelper::Write(const char* data, vtkIdType length)
{
if ( !this->Internal )
{
return 0;
}
jbyteArray array = this->Internal->JavaEnvironment->NewByteArray(length);
jbyte *jarray = this->Internal->JavaEnvironment->GetByteArrayElements(array,NULL);
vtkIdType cc;
for ( cc = 0; cc < length; ++ cc )
{
jarray[cc] = data[cc];
}
this->Internal->JavaEnvironment->ReleaseByteArrayElements(array,jarray,0);
this->Internal->JavaEnvironment->CallVoidMethod(this->Internal->X3DBinaryConverterObject, this->Internal->X3DBinaryConverterClass_Write,
array);
return 1;
}
//----------------------------------------------------------------------------
int vtkX3DExporterJavaHelper::Close()
{
if ( !this->Internal )
{
return 0;
}
this->Internal->JavaEnvironment->CallVoidMethod(this->Internal->X3DBinaryConverterObject, this->Internal->X3DBinaryConverterClass_Close);
return 1;
}
|
