jvpp: suppress unwritten fields warrning found in DTO's hashCode

DTOs fields are initialized by generated JNI code, so
we can safely ignore FB.UWF_UNWRITTEN_PUBLIC_OR_PROTECTED_FIELD.

Coverity uses FindBugs to analyse Java code,
so it should be possible to suppress some of the
issues that are false positives or intentional.

Change-Id: I1375f6123e3eb44db44065d603d9d81726161acb
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>

2 files changed, 42 insertions, 0 deletions

diff --git a/src/vpp-api/java/jvpp-registry/io/fd/vpp/jvpp/coverity/SuppressFBWarnings.java b/src/vpp-api/java/jvpp-registry/io/fd/vpp/jvpp/coverity/SuppressFBWarnings.java
new file mode 100644
index 00000000000..1e780bb459e
--- /dev/null
+++ b/src/vpp-api/java/jvpp-registry/io/fd/vpp/jvpp/coverity/SuppressFBWarnings.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2017 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.
+ */
+
+package io.fd.vpp.jvpp.coverity;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Used to suppress FindBugs warnings found by Coverity. <br>
+ * We don't want extra dependency, so we define our own annotation version.
+ *
+ * @see <a href="https://sourceforge.net/p/findbugs/feature-requests/298/#5e88"/>Findbugs sourceforge</a>
+ */
+@Retention(RetentionPolicy.CLASS)
+public @interface SuppressFBWarnings {
+    /**
+     * The set of FindBugs warnings that are to be suppressed in annotated element. The value can be a bug category,
+     * kind or pattern.
+     */
+    String[] value() default {};
+
+    /**
+     * Optional documentation of the reason why the warning is suppressed
+     */
+    String justification() default "";
+}
diff --git a/src/vpp-api/java/jvpp/gen/jvppgen/dto_gen.py b/src/vpp-api/java/jvpp/gen/jvppgen/dto_gen.py
index cfddb9ef327..e831557c15a 100644
--- a/src/vpp-api/java/jvpp/gen/jvppgen/dto_gen.py
+++ b/src/vpp-api/java/jvpp/gen/jvppgen/dto_gen.py
@@ -193,10 +193,12 @@ def generate_dto_equals(camel_case_dto_name, func):
 
 
 hash_template = Template("""    @Override
+    @io.fd.vpp.jvpp.coverity.SuppressFBWarnings("UWF_UNWRITTEN_PUBLIC_OR_PROTECTED_FIELD")
     public int hashCode() {
         return java.util.Objects.hash($fields);
     }\n\n""")
 hash_single_array_type_template = Template("""    @Override
+    @io.fd.vpp.jvpp.coverity.SuppressFBWarnings("UWF_UNWRITTEN_PUBLIC_OR_PROTECTED_FIELD")
     public int hashCode() {
         return java.util.Arrays.hashCode($fields);
     }\n\n""")