Mercurial > hg > orthanc-java
annotate Plugin/JavaEnvironment.cpp @ 43:678bbed285a1 default tip
improved import of JNI in cmake
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 06 Sep 2024 13:53:54 +0200 |
parents | 10406d66d1c6 |
children |
rev | line source |
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5 | 1 /** |
20 | 2 * SPDX-FileCopyrightText: 2023-2024 Sebastien Jodogne, UCLouvain, Belgium |
5 | 3 * SPDX-License-Identifier: GPL-3.0-or-later |
4 */ | |
5 | |
6 /** | |
7 * Java plugin for Orthanc | |
20 | 8 * Copyright (C) 2023-2024 Sebastien Jodogne, UCLouvain, Belgium |
5 | 9 * |
10 * This program is free software: you can redistribute it and/or | |
11 * modify it under the terms of the GNU General Public License as | |
12 * published by the Free Software Foundation, either version 3 of the | |
13 * License, or (at your option) any later version. | |
14 * | |
15 * This program is distributed in the hope that it will be useful, but | |
16 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 * General Public License for more details. | |
19 * | |
20 * You should have received a copy of the GNU General Public License | |
21 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
22 **/ | |
23 | |
24 | |
25 #include "JavaEnvironment.h" | |
27
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26 #include "JavaString.h" |
5 | 27 |
28 #include <cassert> | |
29 #include <stdexcept> | |
30 | |
31 extern OrthancPluginContext* context_; | |
32 | |
33 | |
34 static const char* ORTHANC_EXCEPTION_JAVA_CLASS = "be/uclouvain/orthanc/OrthancException"; | |
35 | |
36 | |
37 JavaEnvironment::JavaEnvironment(JNIEnv* env) : | |
38 jvm_(NULL), | |
39 env_(env) | |
40 { | |
41 if (env_ == NULL) | |
42 { | |
43 throw std::runtime_error("Null pointer"); | |
44 } | |
45 } | |
46 | |
47 | |
48 JavaEnvironment::JavaEnvironment(JavaVirtualMachine& jvm) : | |
49 jvm_(&jvm.GetValue()) | |
50 { | |
51 jint status = jvm_->GetEnv((void **) &env_, JNI_VERSION_1_6); | |
52 | |
53 switch (status) | |
54 { | |
55 case JNI_OK: | |
56 break; | |
57 | |
58 case JNI_EDETACHED: | |
59 { | |
60 jint code = jvm_->AttachCurrentThread((void **) &env_, NULL); | |
61 if (code != JNI_OK) | |
62 { | |
63 throw std::runtime_error("Cannot attach thread"); | |
64 } | |
65 break; | |
66 } | |
67 | |
68 case JNI_EVERSION: | |
69 throw std::runtime_error("JNI version not supported"); | |
70 | |
71 default: | |
72 throw std::runtime_error("Not implemented"); | |
73 } | |
74 | |
75 if (env_ == NULL) | |
76 { | |
77 throw std::runtime_error("Error inside JNI"); | |
78 } | |
79 } | |
80 | |
81 | |
82 JavaEnvironment::~JavaEnvironment() | |
83 { | |
84 if (jvm_ != NULL) | |
85 { | |
86 jvm_->DetachCurrentThread(); | |
87 } | |
88 } | |
89 | |
90 | |
91 JNIEnv& JavaEnvironment::GetValue() | |
92 { | |
93 assert(env_ != NULL); | |
94 return *env_; | |
95 } | |
96 | |
97 | |
98 void JavaEnvironment::CheckException() | |
99 { | |
100 if (env_->ExceptionCheck() == JNI_TRUE) | |
101 { | |
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102 jthrowable e = env_->ExceptionOccurred(); |
5 | 103 env_->ExceptionClear(); |
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104 |
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105 jclass clazz = env_->GetObjectClass(e); |
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106 if (clazz != NULL) |
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107 { |
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108 jmethodID getMessage = env_->GetMethodID(clazz, "getMessage", "()Ljava/lang/String;"); |
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109 if (getMessage != NULL) |
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110 { |
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111 JavaString message(env_, (jstring) env_->CallObjectMethod(e, getMessage)); |
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112 throw std::runtime_error("An exception has occurred in Java: " + std::string(message.GetValue())); |
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113 } |
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114 } |
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115 |
5 | 116 throw std::runtime_error("An exception has occurred in Java"); |
117 } | |
118 } | |
119 | |
120 | |
121 void JavaEnvironment::ThrowException(const std::string& fqn, | |
122 const std::string& message) | |
123 { | |
124 if (GetValue().ThrowNew(FindClass(fqn), message.c_str()) != 0) | |
125 { | |
33 | 126 std::string tmp = "Cannot throw exception " + fqn; |
127 OrthancPluginLogError(context_, tmp.c_str()); | |
5 | 128 } |
129 } | |
130 | |
131 | |
132 void JavaEnvironment::ThrowOrthancException(const std::string& message) | |
133 { | |
134 ThrowException(ORTHANC_EXCEPTION_JAVA_CLASS, message); | |
135 } | |
136 | |
137 | |
138 void JavaEnvironment::ThrowOrthancException(OrthancPluginErrorCode code) | |
139 { | |
140 ThrowException(ORTHANC_EXCEPTION_JAVA_CLASS, OrthancPluginGetErrorDescription(context_, code)); | |
141 } | |
142 | |
143 | |
144 void JavaEnvironment::ThrowOrthancException(JNIEnv* env, | |
145 const std::string& message) | |
146 { | |
147 JavaEnvironment e(env); | |
148 e.ThrowOrthancException(message); | |
149 } | |
150 | |
151 | |
152 void JavaEnvironment::ThrowOrthancException(JNIEnv* env, | |
153 OrthancPluginErrorCode code) | |
154 { | |
155 JavaEnvironment e(env); | |
156 e.ThrowOrthancException(code); | |
157 } | |
158 | |
159 | |
160 void JavaEnvironment::RegisterNatives(const std::string& fqn, | |
161 const std::vector<JNINativeMethod>& methods) | |
162 { | |
163 if (!methods.empty()) | |
164 { | |
165 if (env_->RegisterNatives(FindClass(fqn), &methods[0], methods.size()) < 0) | |
166 { | |
167 throw std::runtime_error("Unable to register the native methods"); | |
168 } | |
169 } | |
170 } | |
171 | |
172 | |
173 void JavaEnvironment::RunGarbageCollector() | |
174 { | |
175 assert(env_ != NULL); | |
176 | |
177 jclass system = FindClass("java/lang/System"); | |
178 | |
179 jmethodID runFinalization = env_->GetStaticMethodID(system, "gc", "()V"); | |
180 if (runFinalization != NULL) | |
181 { | |
182 env_->CallStaticVoidMethod(system, runFinalization); | |
183 CheckException(); | |
184 } | |
185 else | |
186 { | |
187 throw std::runtime_error("Cannot run garbage collector"); | |
188 } | |
189 } | |
190 | |
191 | |
192 jclass JavaEnvironment::FindClass(const std::string& fqn) | |
193 { | |
194 jclass c = GetValue().FindClass(fqn.c_str()); | |
195 | |
196 if (c == NULL) | |
197 { | |
198 throw std::runtime_error("Unable to find class: " + fqn); | |
199 } | |
200 else | |
201 { | |
202 return c; | |
203 } | |
204 } | |
205 | |
206 | |
207 jclass JavaEnvironment::GetObjectClass(jobject obj) | |
208 { | |
209 jclass c = GetValue().GetObjectClass(obj); | |
210 | |
211 if (c == NULL) | |
212 { | |
213 throw std::runtime_error("Unable to get class of object"); | |
214 } | |
215 else | |
216 { | |
217 return c; | |
218 } | |
219 } | |
220 | |
221 | |
222 jmethodID JavaEnvironment::GetMethodID(jclass c, | |
223 const std::string& method, | |
224 const std::string& signature) | |
225 { | |
226 jmethodID m = GetValue().GetMethodID(c, method.c_str(), signature.c_str()); | |
227 | |
228 if (m == NULL) | |
229 { | |
230 throw std::runtime_error("Unable to locate method in class"); | |
231 } | |
232 else | |
233 { | |
234 return m; | |
235 } | |
236 } | |
237 | |
238 | |
239 jobject JavaEnvironment::ConstructJavaWrapper(const std::string& fqn, | |
240 void* nativeObject) | |
241 { | |
242 jclass cls = FindClass(fqn); | |
243 jmethodID constructor = GetMethodID(cls, "<init>", "(J)V"); | |
244 jobject obj = env_->NewObject(cls, constructor, reinterpret_cast<intptr_t>(nativeObject)); | |
245 | |
246 if (obj == NULL) | |
247 { | |
248 throw std::runtime_error("Cannot create Java wrapper around C/C++ object: " + fqn); | |
249 } | |
250 else | |
251 { | |
252 return obj; | |
253 } | |
254 } | |
255 | |
256 | |
257 jbyteArray JavaEnvironment::ConstructByteArray(const size_t size, | |
258 const void* data) | |
259 { | |
260 assert(env_ != NULL); | |
261 jbyteArray obj = env_->NewByteArray(size); | |
262 if (obj == NULL) | |
263 { | |
264 throw std::runtime_error("Cannot create a byte array"); | |
265 } | |
266 else | |
267 { | |
268 if (size > 0) | |
269 { | |
270 env_->SetByteArrayRegion(obj, 0, size, reinterpret_cast<const jbyte*>(data)); | |
271 } | |
272 | |
273 return obj; | |
274 } | |
275 } | |
276 | |
277 | |
278 jobject JavaEnvironment::ConstructEnumValue(const std::string& fqn, | |
279 int value) | |
280 { | |
281 assert(env_ != NULL); | |
282 jclass cls = FindClass(fqn); | |
283 | |
284 std::string signature = "(I)L" + fqn + ";"; | |
285 jmethodID constructor = env_->GetStaticMethodID(cls, "getInstance", signature.c_str()); | |
286 if (constructor != NULL) | |
287 { | |
288 jobject obj = env_->CallStaticObjectMethod(cls, constructor, static_cast<jint>(value)); | |
289 CheckException(); | |
290 return obj; | |
291 } | |
292 else | |
293 { | |
294 char buf[16]; | |
295 sprintf(buf, "%d", value); | |
296 throw std::runtime_error("Cannot create enumeration value: " + fqn + " " + buf); | |
297 } | |
298 } |