Mercurial > hg > orthanc-java
comparison Plugin/JavaEnvironment.cpp @ 5:c8f19e93ff99
reorganization
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Thu, 19 Oct 2023 08:49:07 +0200 |
parents | |
children | 1c407ba1d311 |
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4:9032ffb3a7d5 | 5:c8f19e93ff99 |
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1 /** | |
2 * SPDX-FileCopyrightText: 2023 Sebastien Jodogne, UCLouvain, Belgium | |
3 * SPDX-License-Identifier: GPL-3.0-or-later | |
4 */ | |
5 | |
6 /** | |
7 * Java plugin for Orthanc | |
8 * Copyright (C) 2023 Sebastien Jodogne, UCLouvain, Belgium | |
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" | |
26 | |
27 #include <cassert> | |
28 #include <stdexcept> | |
29 | |
30 extern OrthancPluginContext* context_; | |
31 | |
32 | |
33 static const char* ORTHANC_EXCEPTION_JAVA_CLASS = "be/uclouvain/orthanc/OrthancException"; | |
34 | |
35 | |
36 JavaEnvironment::JavaEnvironment(JNIEnv* env) : | |
37 jvm_(NULL), | |
38 env_(env) | |
39 { | |
40 if (env_ == NULL) | |
41 { | |
42 throw std::runtime_error("Null pointer"); | |
43 } | |
44 } | |
45 | |
46 | |
47 JavaEnvironment::JavaEnvironment(JavaVirtualMachine& jvm) : | |
48 jvm_(&jvm.GetValue()) | |
49 { | |
50 jint status = jvm_->GetEnv((void **) &env_, JNI_VERSION_1_6); | |
51 | |
52 switch (status) | |
53 { | |
54 case JNI_OK: | |
55 break; | |
56 | |
57 case JNI_EDETACHED: | |
58 { | |
59 jint code = jvm_->AttachCurrentThread((void **) &env_, NULL); | |
60 if (code != JNI_OK) | |
61 { | |
62 throw std::runtime_error("Cannot attach thread"); | |
63 } | |
64 break; | |
65 } | |
66 | |
67 case JNI_EVERSION: | |
68 throw std::runtime_error("JNI version not supported"); | |
69 | |
70 default: | |
71 throw std::runtime_error("Not implemented"); | |
72 } | |
73 | |
74 if (env_ == NULL) | |
75 { | |
76 throw std::runtime_error("Error inside JNI"); | |
77 } | |
78 } | |
79 | |
80 | |
81 JavaEnvironment::~JavaEnvironment() | |
82 { | |
83 if (jvm_ != NULL) | |
84 { | |
85 jvm_->DetachCurrentThread(); | |
86 } | |
87 } | |
88 | |
89 | |
90 JNIEnv& JavaEnvironment::GetValue() | |
91 { | |
92 assert(env_ != NULL); | |
93 return *env_; | |
94 } | |
95 | |
96 | |
97 void JavaEnvironment::CheckException() | |
98 { | |
99 if (env_->ExceptionCheck() == JNI_TRUE) | |
100 { | |
101 env_->ExceptionClear(); | |
102 throw std::runtime_error("An exception has occurred in Java"); | |
103 } | |
104 } | |
105 | |
106 | |
107 void JavaEnvironment::ThrowException(const std::string& fqn, | |
108 const std::string& message) | |
109 { | |
110 if (GetValue().ThrowNew(FindClass(fqn), message.c_str()) != 0) | |
111 { | |
112 std::string message = "Cannot throw exception " + fqn; | |
113 OrthancPluginLogError(context_, message.c_str()); | |
114 } | |
115 } | |
116 | |
117 | |
118 void JavaEnvironment::ThrowOrthancException(const std::string& message) | |
119 { | |
120 ThrowException(ORTHANC_EXCEPTION_JAVA_CLASS, message); | |
121 } | |
122 | |
123 | |
124 void JavaEnvironment::ThrowOrthancException(OrthancPluginErrorCode code) | |
125 { | |
126 ThrowException(ORTHANC_EXCEPTION_JAVA_CLASS, OrthancPluginGetErrorDescription(context_, code)); | |
127 } | |
128 | |
129 | |
130 void JavaEnvironment::ThrowOrthancException(JNIEnv* env, | |
131 const std::string& message) | |
132 { | |
133 JavaEnvironment e(env); | |
134 e.ThrowOrthancException(message); | |
135 } | |
136 | |
137 | |
138 void JavaEnvironment::ThrowOrthancException(JNIEnv* env, | |
139 OrthancPluginErrorCode code) | |
140 { | |
141 JavaEnvironment e(env); | |
142 e.ThrowOrthancException(code); | |
143 } | |
144 | |
145 | |
146 void JavaEnvironment::RegisterNatives(const std::string& fqn, | |
147 const std::vector<JNINativeMethod>& methods) | |
148 { | |
149 if (!methods.empty()) | |
150 { | |
151 if (env_->RegisterNatives(FindClass(fqn), &methods[0], methods.size()) < 0) | |
152 { | |
153 throw std::runtime_error("Unable to register the native methods"); | |
154 } | |
155 } | |
156 } | |
157 | |
158 | |
159 void JavaEnvironment::RunGarbageCollector() | |
160 { | |
161 assert(env_ != NULL); | |
162 | |
163 jclass system = FindClass("java/lang/System"); | |
164 | |
165 jmethodID runFinalization = env_->GetStaticMethodID(system, "gc", "()V"); | |
166 if (runFinalization != NULL) | |
167 { | |
168 env_->CallStaticVoidMethod(system, runFinalization); | |
169 CheckException(); | |
170 } | |
171 else | |
172 { | |
173 throw std::runtime_error("Cannot run garbage collector"); | |
174 } | |
175 } | |
176 | |
177 | |
178 jclass JavaEnvironment::FindClass(const std::string& fqn) | |
179 { | |
180 jclass c = GetValue().FindClass(fqn.c_str()); | |
181 | |
182 if (c == NULL) | |
183 { | |
184 throw std::runtime_error("Unable to find class: " + fqn); | |
185 } | |
186 else | |
187 { | |
188 return c; | |
189 } | |
190 } | |
191 | |
192 | |
193 jclass JavaEnvironment::GetObjectClass(jobject obj) | |
194 { | |
195 jclass c = GetValue().GetObjectClass(obj); | |
196 | |
197 if (c == NULL) | |
198 { | |
199 throw std::runtime_error("Unable to get class of object"); | |
200 } | |
201 else | |
202 { | |
203 return c; | |
204 } | |
205 } | |
206 | |
207 | |
208 jmethodID JavaEnvironment::GetMethodID(jclass c, | |
209 const std::string& method, | |
210 const std::string& signature) | |
211 { | |
212 jmethodID m = GetValue().GetMethodID(c, method.c_str(), signature.c_str()); | |
213 | |
214 if (m == NULL) | |
215 { | |
216 throw std::runtime_error("Unable to locate method in class"); | |
217 } | |
218 else | |
219 { | |
220 return m; | |
221 } | |
222 } | |
223 | |
224 | |
225 jobject JavaEnvironment::ConstructJavaWrapper(const std::string& fqn, | |
226 void* nativeObject) | |
227 { | |
228 jclass cls = FindClass(fqn); | |
229 jmethodID constructor = GetMethodID(cls, "<init>", "(J)V"); | |
230 jobject obj = env_->NewObject(cls, constructor, reinterpret_cast<intptr_t>(nativeObject)); | |
231 | |
232 if (obj == NULL) | |
233 { | |
234 throw std::runtime_error("Cannot create Java wrapper around C/C++ object: " + fqn); | |
235 } | |
236 else | |
237 { | |
238 return obj; | |
239 } | |
240 } | |
241 | |
242 | |
243 jbyteArray JavaEnvironment::ConstructByteArray(const size_t size, | |
244 const void* data) | |
245 { | |
246 assert(env_ != NULL); | |
247 jbyteArray obj = env_->NewByteArray(size); | |
248 if (obj == NULL) | |
249 { | |
250 throw std::runtime_error("Cannot create a byte array"); | |
251 } | |
252 else | |
253 { | |
254 if (size > 0) | |
255 { | |
256 env_->SetByteArrayRegion(obj, 0, size, reinterpret_cast<const jbyte*>(data)); | |
257 } | |
258 | |
259 return obj; | |
260 } | |
261 } | |
262 | |
263 | |
264 jobject JavaEnvironment::ConstructEnumValue(const std::string& fqn, | |
265 int value) | |
266 { | |
267 assert(env_ != NULL); | |
268 jclass cls = FindClass(fqn); | |
269 | |
270 std::string signature = "(I)L" + fqn + ";"; | |
271 jmethodID constructor = env_->GetStaticMethodID(cls, "getInstance", signature.c_str()); | |
272 if (constructor != NULL) | |
273 { | |
274 jobject obj = env_->CallStaticObjectMethod(cls, constructor, static_cast<jint>(value)); | |
275 CheckException(); | |
276 return obj; | |
277 } | |
278 else | |
279 { | |
280 char buf[16]; | |
281 sprintf(buf, "%d", value); | |
282 throw std::runtime_error("Cannot create enumeration value: " + fqn + " " + buf); | |
283 } | |
284 } |