3 # Copyright (c) 2016 Cisco and/or its affiliates.
4 # Licensed under the Apache License, Version 2.0 (the "License");
5 # you may not use this file except in compliance with the License.
6 # You may obtain a copy of the License at:
8 # http://www.apache.org/licenses/LICENSE-2.0
10 # Unless required by applicable law or agreed to in writing, software
11 # distributed under the License is distributed on an "AS IS" BASIS,
12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 # See the License for the specific language governing permissions and
14 # limitations under the License.
18 from string import Template
20 def is_manually_generated(f_name):
21 return f_name in {'control_ping_reply'}
24 class_reference_template = Template("""jclass ${ref_name}Class;
27 find_class_invocation_template = Template("""
28 ${ref_name}Class = (jclass)(*env)->NewGlobalRef(env, (*env)->FindClass(env, "org/openvpp/jvpp/dto/${class_name}"));
29 if ((*env)->ExceptionCheck(env)) {
30 (*env)->ExceptionDescribe(env);
34 class_cache_template = Template("""
36 static int cache_class_references(JNIEnv* env) {
37 $find_class_invocations
41 def generate_class_cache(func_list):
43 find_class_invocations = []
46 class_name = util.underscore_to_camelcase_upper(c_name)
47 ref_name = util.underscore_to_camelcase(c_name)
49 if not util.is_reply(class_name) or util.is_ignored(c_name) or util.is_notification(c_name):
50 # TODO handle notifications
53 class_references.append(class_reference_template.substitute(
56 find_class_invocations.append(find_class_invocation_template.substitute(
58 class_name=class_name))
60 return class_cache_template.substitute(
61 class_references="".join(class_references), find_class_invocations="".join(find_class_invocations))
64 # TODO: cache method and field identifiers to achieve better performance
65 # https://jira.fd.io/browse/HONEYCOMB-42
66 request_class_template = Template("""
67 jclass requestClass = (*env)->FindClass(env, "org/openvpp/jvpp/dto/${java_name_upper}");""")
69 request_field_identifier_template = Template("""
70 jfieldID ${java_name}FieldId = (*env)->GetFieldID(env, requestClass, "${java_name}", "${jni_signature}");
71 ${jni_type} ${java_name} = (*env)->Get${jni_getter}(env, request, ${java_name}FieldId);
74 u8_struct_setter_template = Template("""
75 mp->${c_name} = ${java_name};""")
77 u16_struct_setter_template = Template("""
78 mp->${c_name} = clib_host_to_net_u16(${java_name});""")
80 u32_struct_setter_template = Template("""
81 mp->${c_name} = clib_host_to_net_u32(${java_name});""")
83 i32_struct_setter_template = Template("""
84 mp->${c_name} = clib_host_to_net_i32(${java_name});!""")
86 u64_struct_setter_template = Template("""
87 mp->${c_name} = clib_host_to_net_u64(${java_name});""")
89 u8_array_struct_setter_template = Template("""
91 jsize cnt = (*env)->GetArrayLength (env, ${java_name});
92 if (cnt > sizeof(mp->${c_name})) cnt = sizeof(mp->${c_name});
93 (*env)->GetByteArrayRegion(env, ${java_name}, 0, cnt, (jbyte *)mp->${c_name});
97 u32_array_struct_setter_template = Template("""
98 jint * ${java_name}ArrayElements = (*env)->GetIntArrayElements(env, ${java_name}, NULL);
101 for (_i = 0; _i < 0; _i++) {
102 mp->${c_name}[_i] = clib_host_to_net_u32(${java_name}ArrayElements[_i]);
105 (*env)->ReleaseIntArrayElements (env, ${java_name}, ${java_name}ArrayElements, 0);
108 vl_api_ip4_fib_counter_t_array_struct_setter_template = Template("""
109 // vl_api_ip4_fib_counter_t_array_field_setter_template FIXME""")
111 vl_api_ip6_fib_counter_t_array_struct_setter_template = Template("""
112 // vl_api_ip6_fib_counter_t_array_field_setter_template FIXME""")
114 struct_setter_templates = {'u8': u8_struct_setter_template,
115 'u16': u32_struct_setter_template,
116 'u32': u32_struct_setter_template,
117 'i32': u32_struct_setter_template,
118 'u64': u64_struct_setter_template,
119 'u8[]': u8_array_struct_setter_template,
120 'u32[]': u32_array_struct_setter_template,
121 'vl_api_ip4_fib_counter_t[]': vl_api_ip4_fib_counter_t_array_struct_setter_template,
122 'vl_api_ip6_fib_counter_t[]': vl_api_ip6_fib_counter_t_array_struct_setter_template
125 jni_impl_template = Template("""
127 * JNI binding for sending ${c_name} vpe.api message.
128 * Generated based on $inputfile preparsed data:
131 JNIEXPORT jint JNICALL Java_org_openvpp_jvpp_JVppImpl_${java_name}0
132 (JNIEnv * env, jclass clazz$args) {
133 vppjni_main_t *jm = &vppjni_main;
134 vl_api_${c_name}_t * mp;
137 rv = vppjni_sanity_check (jm);
139 my_context_id = vppjni_get_context_id (jm);
142 M(${c_name_uppercase}, ${c_name});
143 mp->context = clib_host_to_net_u32 (my_context_id);
146 return my_context_id;
149 def generate_jni_impl(func_list, inputfile):
153 camel_case_function_name = util.underscore_to_camelcase(f_name)
154 if is_manually_generated(f_name) or util.is_reply(camel_case_function_name) \
155 or util.is_ignored(f_name) or util.is_notification(f_name):
160 field_identifiers = ''
162 f_name_uppercase = f_name.upper()
165 arguments = ', jobject request'
166 camel_case_function_name_upper = util.underscore_to_camelcase_upper(f_name)
168 request_class = request_class_template.substitute(java_name_upper=camel_case_function_name_upper)
171 for t in zip(f['types'], f['args']):
173 java_field_name = util.underscore_to_camelcase(t[1])
174 jni_signature = util.jni_2_signature_mapping[jni_type]
175 jni_getter = util.jni_field_accessors[jni_type]
176 field_identifiers += request_field_identifier_template.substitute(
178 java_name=java_field_name,
179 jni_signature=jni_signature,
180 jni_getter=jni_getter)
183 for t in zip(f['c_types'], f['args']):
186 java_field_name = util.underscore_to_camelcase(c_name)
188 struct_setter_template = struct_setter_templates[c_type]
190 struct_setters += struct_setter_template.substitute(
192 java_name=java_field_name)
194 jni_impl.append(jni_impl_template.substitute(
196 api_data=util.api_message_to_javadoc(f),
197 java_name=camel_case_function_name,
198 c_name_uppercase=f_name_uppercase,
200 request_class=request_class,
201 field_identifiers=field_identifiers,
202 struct_setters=struct_setters,
205 return "\n".join(jni_impl)
208 dto_field_id_template = Template("""
209 jfieldID ${java_name}FieldId = (*env)->GetFieldID(env, ${class_ref_name}Class, "${java_name}", "${jni_signature}");""")
211 default_dto_field_setter_template = Template("""
212 (*env)->Set${jni_setter}(env, dto, ${java_name}FieldId, mp->${c_name});
215 u32_dto_field_setter_template = Template("""
216 (*env)->Set${jni_setter}(env, dto, ${java_name}FieldId, clib_net_to_host_u32(mp->${c_name}));
219 u64_dto_field_setter_template = Template("""
220 (*env)->Set${jni_setter}(env, dto, ${java_name}FieldId, clib_net_to_host_u64(mp->${c_name}));
223 u8_array_dto_field_setter_template = Template("""
224 jbyteArray ${java_name} = (*env)->NewByteArray(env, sizeof(mp->${c_name}));
225 (*env)->SetByteArrayRegion(env, ${java_name}, 0, sizeof(mp->${c_name}), (const jbyte*)mp->${c_name});
226 (*env)->SetObjectField(env, dto, ${java_name}FieldId, ${java_name});
229 # For each u64 array we get its elements. Then we convert values to host byte order.
230 # All changes to jint* buffer are written to jlongArray (isCopy is set to NULL)
231 u64_array_dto_field_setter_template = Template("""
232 jlongArray ${java_name} = (*env)->NewLongArray(env, sizeof(mp->${c_name}));
234 jlong * ${java_name}ArrayElements = (*env)->GetLongArrayElements(env, ${java_name}, NULL);
236 for (_i = 0; _i < 0; _i++) {
237 ${java_name}ArrayElements[_i] = clib_net_to_host_u64(mp->${c_name}[_i]);
240 (*env)->SetObjectField(env, dto, ${java_name}FieldId, ${java_name});
243 dto_field_setter_templates = {'u8': default_dto_field_setter_template,
244 'u16': u32_dto_field_setter_template,
245 'u32': u32_dto_field_setter_template,
246 'i32': u32_dto_field_setter_template,
247 'u64': u64_dto_field_setter_template,
248 'f64': default_dto_field_setter_template,
249 'u64[]': u64_array_dto_field_setter_template,
250 'u8[]': u8_array_dto_field_setter_template
253 msg_handler_template = Template("""
255 * Handler for ${handler_name} vpe.api message.
256 * Generated based on $inputfile preparsed data:
259 static void vl_api_${handler_name}_t_handler (vl_api_${handler_name}_t * mp)
261 vppjni_main_t * jm = &vppjni_main;
262 JNIEnv *env = jm->jenv;
264 jmethodID constructor = (*env)->GetMethodID(env, ${class_ref_name}Class, "<init>", "()V");
265 jmethodID callbackMethod = (*env)->GetMethodID(env, jm->callbackClass, "on${dto_name}", "(Lorg/openvpp/jvpp/dto/${dto_name};)V");
267 jobject dto = (*env)->NewObject(env, ${class_ref_name}Class, constructor);
269 (*env)->CallVoidMethod(env, jm->callback, callbackMethod, dto);
272 def generate_msg_handlers(func_list, inputfile):
275 handler_name = f['name']
276 dto_name = util.underscore_to_camelcase_upper(handler_name)
277 ref_name = util.underscore_to_camelcase(handler_name)
279 if is_manually_generated(handler_name) or not util.is_reply(dto_name) or util.is_ignored(handler_name) or util.is_notification(handler_name):
280 # TODO handle notifications
285 for t in zip(f['c_types'], f['types'], f['args']):
290 java_field_name = util.underscore_to_camelcase(c_name)
291 jni_signature = util.jni_2_signature_mapping[jni_type]
292 jni_setter = util.jni_field_accessors[jni_type]
294 dto_setters += dto_field_id_template.substitute(
295 java_name=java_field_name,
296 class_ref_name=ref_name,
297 jni_signature=jni_signature)
299 dto_setter_template = dto_field_setter_templates[c_type]
301 dto_setters += dto_setter_template.substitute(
302 java_name=java_field_name,
303 jni_signature=jni_signature,
305 jni_setter=jni_setter)
307 handlers.append(msg_handler_template.substitute(
309 api_data=util.api_message_to_javadoc(f),
310 handler_name=handler_name,
312 class_ref_name=ref_name,
313 dto_setters=dto_setters))
315 return "\n".join(handlers)
318 handler_registration_template = Template("""_(${upercase_name}, ${name}) \\
322 def generate_handler_registration(func_list):
323 handler_registration = ["#define foreach_vpe_api_msg \\\n"]
326 camelcase_name = util.underscore_to_camelcase(f['name'])
328 if not util.is_reply(camelcase_name) or util.is_ignored(name) or util.is_notification(name):
329 # TODO handle notifications
332 handler_registration.append(handler_registration_template.substitute(
334 upercase_name=name.upper()))
336 return "".join(handler_registration)
339 jvpp_c_template = Template("""/**
340 * This file contains JNI bindings for jvpp Java API.
341 * It was generated by jvpp_c_gen.py based on $inputfile
342 * (python representation of vpe.api generated by vppapigen).
345 // JAVA class reference cache
354 // Registration of message handlers in vlib
355 $handler_registration
358 def generate_jvpp(func_list, inputfile):
359 """ Generates jvpp C file """
360 print "Generating jvpp C"
362 class_cache = generate_class_cache(func_list)
363 jni_impl = generate_jni_impl(func_list, inputfile)
364 msg_handlers = generate_msg_handlers(func_list, inputfile)
365 handler_registration = generate_handler_registration(func_list)
367 jvpp_c_file = open("jvpp_gen.h", 'w')
368 jvpp_c_file.write(jvpp_c_template.substitute(
370 class_cache=class_cache,
371 jni_implementations=jni_impl,
372 msg_handlers=msg_handlers,
373 handler_registration=handler_registration))