Export lib3 to AOSP (external/libtextclassifier part)
1. Include both annotator (existing one) and actions(new one for smart
reply and actions)
2. One more model file. actions_suggestions.model is dropped to
/etc/textclassifier./ It is around 7.5mb for now, we will slim down
it later.
3. The Java counterpart of the JNI is now moved from frameworks/base
to here.
Test: atest android.view.textclassifier.TextClassificationManagerTest
Change-Id: Icb2458967ef51efa2952b3eaddefbf1f7b359930
diff --git a/utils/java/scoped_local_ref.h b/utils/java/scoped_local_ref.h
new file mode 100644
index 0000000..f439c45
--- /dev/null
+++ b/utils/java/scoped_local_ref.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef LIBTEXTCLASSIFIER_UTILS_JAVA_SCOPED_LOCAL_REF_H_
+#define LIBTEXTCLASSIFIER_UTILS_JAVA_SCOPED_LOCAL_REF_H_
+
+#include <jni.h>
+#include <memory>
+#include <type_traits>
+
+#include "utils/base/logging.h"
+
+namespace libtextclassifier3 {
+
+// A deleter to be used with std::unique_ptr to delete JNI local references.
+class LocalRefDeleter {
+ public:
+ LocalRefDeleter() : env_(nullptr) {}
+
+ // Style guide violating implicit constructor so that the LocalRefDeleter
+ // is implicitly constructed from the second argument to ScopedLocalRef.
+ LocalRefDeleter(JNIEnv* env) : env_(env) {} // NOLINT(runtime/explicit)
+
+ LocalRefDeleter(const LocalRefDeleter& orig) = default;
+
+ // Copy assignment to allow move semantics in ScopedLocalRef.
+ LocalRefDeleter& operator=(const LocalRefDeleter& rhs) {
+ // As the deleter and its state are thread-local, ensure the envs
+ // are consistent but do nothing.
+ TC3_CHECK_EQ(env_, rhs.env_);
+ return *this;
+ }
+
+ // The delete operator.
+ void operator()(jobject object) const {
+ if (env_) {
+ env_->DeleteLocalRef(object);
+ }
+ }
+
+ private:
+ // The env_ stashed to use for deletion. Thread-local, don't share!
+ JNIEnv* const env_;
+};
+
+// A smart pointer that deletes a JNI local reference when it goes out
+// of scope. Usage is:
+// ScopedLocalRef<jobject> scoped_local(env->JniFunction(), env);
+//
+// Note that this class is not thread-safe since it caches JNIEnv in
+// the deleter. Do not use the same jobject across different threads.
+template <typename T>
+using ScopedLocalRef =
+ std::unique_ptr<typename std::remove_pointer<T>::type, LocalRefDeleter>;
+
+} // namespace libtextclassifier3
+
+#endif // LIBTEXTCLASSIFIER_UTILS_JAVA_SCOPED_LOCAL_REF_H_