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authorDamjan Marion <damarion@cisco.com>2018-07-30 16:10:14 +0200
committerDave Barach <openvpp@barachs.net>2018-08-01 20:28:53 +0000
commitcc4a5e8089967f0c266e9c5ed319c38c111004cd (patch)
treebc290e03e12a0a02c3fc274740c96eef9e1707c6 /extras/japi/java/jvpp/gen/jvppgen/jni_gen.py
parenta14c16674023bd6672ca49e3551c707702711050 (diff)
Move java api to extras/
Change-Id: Ibd5cbbdfb22a235442cddaebc9eae9a3c4e35ec9 Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'extras/japi/java/jvpp/gen/jvppgen/jni_gen.py')
-rwxr-xr-xextras/japi/java/jvpp/gen/jvppgen/jni_gen.py160
1 files changed, 160 insertions, 0 deletions
diff --git a/extras/japi/java/jvpp/gen/jvppgen/jni_gen.py b/extras/japi/java/jvpp/gen/jvppgen/jni_gen.py
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index 00000000000..ad6c2614062
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+++ b/extras/japi/java/jvpp/gen/jvppgen/jni_gen.py
@@ -0,0 +1,160 @@
+#!/usr/bin/env python2
+#
+# Copyright (c) 2016,2018 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from string import Template
+
+from jni_impl_gen import generate_jni_impl
+from jni_msg_handlers_gen import generate_jni_handlers
+from jni_type_handlers_gen import generate_type_handlers
+from jvpp_model import is_control_ping, is_dump, is_request, is_control_ping_reply
+
+
+def generate_jni(work_dir, model, logger):
+ logger.debug("Generating jvpp C for %s" % model.json_api_files)
+ plugin_name = model.plugin_name
+ messages = model.messages
+
+ with open("%s/jvpp_%s_gen.h" % (work_dir, plugin_name), "w") as f:
+ f.write(_JVPP_C_TEMPLATE.substitute(
+ json_filename=model.json_api_files,
+ class_cache=_generate_class_cache(plugin_name, messages),
+ api_verification=_generate_api_verification(messages),
+ type_handlers=generate_type_handlers(model, logger),
+ jni_implementations=generate_jni_impl(model),
+ msg_handlers=generate_jni_handlers(model),
+ handler_registration=_generate_handler_registration(messages)))
+
+_JVPP_C_TEMPLATE = Template("""/**
+ * This file contains JNI bindings for jvpp Java API.
+ * It was generated by jvpp_jni_gen.py based on $json_filename.
+ */
+$class_cache
+
+$api_verification
+
+// Type handlers
+$type_handlers
+
+// JNI bindings
+$jni_implementations
+
+// Message handlers
+$msg_handlers
+
+$handler_registration
+""")
+
+
+def _generate_class_cache(plugin_name, messages):
+ references = []
+ for msg in messages:
+ if is_control_ping(msg) or is_control_ping_reply(msg):
+ # Skip control_ping managed by jvpp registry.
+ continue
+ references.append((
+ msg.java_name_lower,
+ 'io/fd/vpp/jvpp/%s/dto/%s' % (plugin_name, msg.java_name_upper)
+ ))
+
+ references.append(('callbackException', 'io/fd/vpp/jvpp/VppCallbackException'))
+
+ return _CLASS_CACHE_TEMPLATE.substitute(
+ class_references=_generate_class_references(references),
+ create_references=_generate_create_references(references),
+ delete_references=_generate_delete_references(references)
+ )
+
+_CLASS_CACHE_TEMPLATE = Template("""
+// JAVA class reference cache
+$class_references
+
+static int cache_class_references(JNIEnv* env) {
+$create_references
+ return 0;
+}
+
+static void delete_class_references(JNIEnv* env) {
+$delete_references
+}""")
+
+
+def _generate_class_references(references):
+ return "\n".join("jclass %sClass;" % r[0] for r in references)
+
+
+def _generate_create_references(references):
+ items = []
+ for r in references:
+ items.append(_CREATE_GLOBAL_REF_TEMPLATE.substitute(
+ ref_name=r[0],
+ fqn_name=r[1]
+ ))
+ return "".join(items)
+
+_CREATE_GLOBAL_REF_TEMPLATE = Template("""
+ ${ref_name}Class = (jclass)(*env)->NewGlobalRef(env, (*env)->FindClass(env, "${fqn_name}"));
+ if ((*env)->ExceptionCheck(env)) {
+ (*env)->ExceptionDescribe(env);
+ return JNI_ERR;
+ }""")
+
+
+def _generate_delete_references(references):
+ items = []
+ for r in references:
+ items.append(_DELETE_CLASS_INVOCATION_TEMPLATE.substitute(ref_name=r[0]))
+ return "".join(items)
+
+_DELETE_CLASS_INVOCATION_TEMPLATE = Template("""
+ if (${ref_name}Class) {
+ (*env)->DeleteGlobalRef(env, ${ref_name}Class);
+ }""")
+
+
+def _generate_api_verification(messages):
+ items = []
+ for msg in messages:
+ items.append("_(%s_%s) \\" % (msg.name, msg.crc))
+ return _API_VERIFICATION_TEMPLATE.substitute(messages="\n".join(items))
+
+_API_VERIFICATION_TEMPLATE = Template("""
+// List of supported API messages used for verification
+#define foreach_supported_api_message \\
+$messages
+""")
+
+
+def _generate_handler_registration(messages):
+ """
+ Generates msg handler registration for all messages except for dumps and requests.
+ :param messages: collection of VPP API messages.
+ """
+ handlers = []
+ for msg in messages:
+ if is_control_ping(msg) or is_control_ping_reply(msg):
+ # Skip control_ping managed by jvpp registry.
+ continue
+ if is_dump(msg) or is_request(msg):
+ continue
+ name = msg.name
+ crc = msg.crc
+ handlers.append("_(%s_%s, %s) \\" % (name, crc, name))
+ return _HANDLER_REGISTRATION_TEMPLATE.substitute(handlers="\n".join(handlers))
+
+_HANDLER_REGISTRATION_TEMPLATE = Template("""
+// Registration of message handlers in vlib
+#define foreach_api_reply_handler \\
+$handlers
+""")