jvpp: object model for jvpp generator (VPP-1184)

[vpp.git] / src / vpp-api / java / jvpp / gen / jvppgen / jni_type_handlers_gen.py

diff --git a/src/vpp-api/java/jvpp/gen/jvppgen/jni_type_handlers_gen.py b/src/vpp-api/java/jvpp/gen/jvppgen/jni_type_handlers_gen.py
new file mode 100755 (executable)
index 0000000..eb6ab23
--- /dev/null
+++ b/src/vpp-api/java/jvpp/gen/jvppgen/jni_type_handlers_gen.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python2
+#
+# Copyright (c) 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_common_gen import generate_j2c_swap, generate_j2c_identifiers, generate_c2j_swap
+from jvpp_model import Class
+
+
+def generate_type_handlers(model):
+    """
+    Generates msg handlers for all messages except for dumps and requests (handled by vpp, not client).
+    :param model: meta-model of VPP API used for jVPP generation.
+    """
+    type_handlers = []
+    for t in model.types:
+        if not isinstance(t, Class):
+            continue
+        ref_name = t.java_name_lower
+        jni_identifiers = generate_j2c_identifiers(t, class_ref_name="%sClass" % ref_name, object_ref_name="_host")
+        type_handlers.append(_TYPE_NET_TO_HOST_TEMPLATE.substitute(
+            c_name=t.name,
+            json_filename=model.json_api_files,
+            json_definition=t.doc,
+            type_reference_name=ref_name,
+            class_FQN=t.jni_name,
+            jni_identifiers=jni_identifiers,
+            type_swap=generate_j2c_swap(t, struct_ref_name="_net")
+        ))
+
+        type_handlers.append(_TYPE_HOST_TO_NET_TEMPLATE.substitute(
+            c_name=t.name,
+            json_filename=model.json_api_files,
+            json_definition=t.doc,
+            type_reference_name=ref_name,
+            class_FQN=t.jni_name,
+            jni_identifiers=jni_identifiers,
+            type_swap=generate_c2j_swap(t, object_ref_name="_host", struct_ref_name="_net")
+        ))
+
+    return "\n".join(type_handlers)
+
+_TYPE_NET_TO_HOST_TEMPLATE = Template("""
+/**
+ * Host to network byte order conversion for ${c_name} type.
+ * Generated based on $json_filename:
+$json_definition
+ */
+static inline void _host_to_net_${c_name}(JNIEnv * env, jobject _host, vl_api_${c_name}_t * _net)
+{
+    jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
+$jni_identifiers
+$type_swap
+}""")
+
+_TYPE_HOST_TO_NET_TEMPLATE = Template("""
+/**
+ * Network to host byte order conversion for ${c_name} type.
+ * Generated based on $json_filename:
+$json_definition
+ */
+static inline void _net_to_host_${c_name}(JNIEnv * env, vl_api_${c_name}_t * _net, jobject _host)
+{
+    jclass ${type_reference_name}Class = (*env)->FindClass(env, "${class_FQN}");
+$type_swap
+}""")