/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_
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#define LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_
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#include <jni.h>
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#include "utils/java/scoped_global_ref.h"
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#include "utils/java/scoped_local_ref.h"
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#include "utils/strings/stringpiece.h"
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#include "utils/utf8/unicodetext.h"
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namespace libtextclassifier3 {
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// A helper class to cache class and method pointers for calls from JNI to Java.
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// (for implementations such as Java ICU that need to make calls from C++ to
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// Java)
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struct JniCache {
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static std::unique_ptr<JniCache> Create(JNIEnv* env);
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JNIEnv* GetEnv() const;
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bool ExceptionCheckAndClear() const;
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JavaVM* jvm = nullptr;
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// java.lang.String
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ScopedGlobalRef<jclass> string_class;
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jmethodID string_init_bytes_charset = nullptr;
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jmethodID string_code_point_count = nullptr;
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jmethodID string_length = nullptr;
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ScopedGlobalRef<jstring> string_utf8;
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// java.util.regex.Pattern
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ScopedGlobalRef<jclass> pattern_class;
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jmethodID pattern_compile = nullptr;
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jmethodID pattern_matcher = nullptr;
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// java.util.regex.Matcher
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ScopedGlobalRef<jclass> matcher_class;
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jmethodID matcher_matches = nullptr;
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jmethodID matcher_find = nullptr;
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jmethodID matcher_reset = nullptr;
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jmethodID matcher_start_idx = nullptr;
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jmethodID matcher_end_idx = nullptr;
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jmethodID matcher_group = nullptr;
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jmethodID matcher_group_idx = nullptr;
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// java.util.Locale
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ScopedGlobalRef<jclass> locale_class;
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ScopedGlobalRef<jobject> locale_us;
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jmethodID locale_init_string = nullptr;
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jmethodID locale_for_language_tag = nullptr;
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// java.text.BreakIterator
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ScopedGlobalRef<jclass> breakiterator_class;
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jmethodID breakiterator_getwordinstance = nullptr;
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jmethodID breakiterator_settext = nullptr;
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jmethodID breakiterator_next = nullptr;
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// java.lang.Integer
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ScopedGlobalRef<jclass> integer_class;
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jmethodID integer_parse_int = nullptr;
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// java.util.Calendar
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ScopedGlobalRef<jclass> calendar_class;
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jmethodID calendar_get_instance = nullptr;
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jmethodID calendar_get_first_day_of_week = nullptr;
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jmethodID calendar_get_time_in_millis = nullptr;
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jmethodID calendar_set_time_in_millis = nullptr;
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jmethodID calendar_add = nullptr;
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jmethodID calendar_get = nullptr;
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jmethodID calendar_set = nullptr;
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jint calendar_zone_offset;
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jint calendar_dst_offset;
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jint calendar_year;
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jint calendar_month;
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jint calendar_day_of_year;
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jint calendar_day_of_month;
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jint calendar_day_of_week;
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jint calendar_hour_of_day;
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jint calendar_minute;
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jint calendar_second;
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jint calendar_millisecond;
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jint calendar_sunday;
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jint calendar_monday;
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jint calendar_tuesday;
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jint calendar_wednesday;
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jint calendar_thursday;
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jint calendar_friday;
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jint calendar_saturday;
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// java.util.TimeZone
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ScopedGlobalRef<jclass> timezone_class;
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jmethodID timezone_get_timezone = nullptr;
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// java.net.URLEncoder
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ScopedGlobalRef<jclass> urlencoder_class;
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jmethodID urlencoder_encode = nullptr;
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// android.content.Context
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ScopedGlobalRef<jclass> context_class;
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jmethodID context_get_package_name = nullptr;
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jmethodID context_get_system_service = nullptr;
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// android.net.Uri
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ScopedGlobalRef<jclass> uri_class;
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jmethodID uri_parse = nullptr;
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jmethodID uri_get_scheme = nullptr;
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jmethodID uri_get_host = nullptr;
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// android.os.UserManager
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ScopedGlobalRef<jclass> usermanager_class;
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jmethodID usermanager_get_user_restrictions = nullptr;
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// android.os.Bundle
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ScopedGlobalRef<jclass> bundle_class;
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jmethodID bundle_get_boolean = nullptr;
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// android.content.res.Resources
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ScopedGlobalRef<jclass> resources_class;
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jmethodID resources_get_system = nullptr;
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jmethodID resources_get_identifier = nullptr;
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jmethodID resources_get_string = nullptr;
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// Helper to convert lib3 UnicodeText to Java strings.
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ScopedLocalRef<jstring> ConvertToJavaString(
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const char* utf8_text, const int utf8_text_size_bytes) const;
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ScopedLocalRef<jstring> ConvertToJavaString(StringPiece utf8_text) const;
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ScopedLocalRef<jstring> ConvertToJavaString(const UnicodeText& text) const;
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private:
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explicit JniCache(JavaVM* jvm);
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};
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} // namespace libtextclassifier3
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#endif // LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_
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