1 /* 2 * Copyright (C) 2018 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_ 18 #define LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_ 19 20 #include <jni.h> 21 #include "utils/java/scoped_global_ref.h" 22 #include "utils/java/scoped_local_ref.h" 23 #include "utils/strings/stringpiece.h" 24 #include "utils/utf8/unicodetext.h" 25 26 namespace libtextclassifier3 { 27 28 // A helper class to cache class and method pointers for calls from JNI to Java. 29 // (for implementations such as Java ICU that need to make calls from C++ to 30 // Java) 31 struct JniCache { 32 static std::unique_ptr<JniCache> Create(JNIEnv* env); 33 34 JNIEnv* GetEnv() const; 35 bool ExceptionCheckAndClear() const; 36 37 JavaVM* jvm = nullptr; 38 39 // java.lang.String 40 ScopedGlobalRef<jclass> string_class; 41 jmethodID string_init_bytes_charset = nullptr; 42 jmethodID string_code_point_count = nullptr; 43 jmethodID string_length = nullptr; 44 ScopedGlobalRef<jstring> string_utf8; 45 46 // java.util.regex.Pattern 47 ScopedGlobalRef<jclass> pattern_class; 48 jmethodID pattern_compile = nullptr; 49 jmethodID pattern_matcher = nullptr; 50 51 // java.util.regex.Matcher 52 ScopedGlobalRef<jclass> matcher_class; 53 jmethodID matcher_matches = nullptr; 54 jmethodID matcher_find = nullptr; 55 jmethodID matcher_reset = nullptr; 56 jmethodID matcher_start_idx = nullptr; 57 jmethodID matcher_end_idx = nullptr; 58 jmethodID matcher_group = nullptr; 59 jmethodID matcher_group_idx = nullptr; 60 61 // java.util.Locale 62 ScopedGlobalRef<jclass> locale_class; 63 ScopedGlobalRef<jobject> locale_us; 64 jmethodID locale_init_string = nullptr; 65 jmethodID locale_for_language_tag = nullptr; 66 67 // java.text.BreakIterator 68 ScopedGlobalRef<jclass> breakiterator_class; 69 jmethodID breakiterator_getwordinstance = nullptr; 70 jmethodID breakiterator_settext = nullptr; 71 jmethodID breakiterator_next = nullptr; 72 73 // java.lang.Integer 74 ScopedGlobalRef<jclass> integer_class; 75 jmethodID integer_parse_int = nullptr; 76 77 // java.util.Calendar 78 ScopedGlobalRef<jclass> calendar_class; 79 jmethodID calendar_get_instance = nullptr; 80 jmethodID calendar_get_first_day_of_week = nullptr; 81 jmethodID calendar_get_time_in_millis = nullptr; 82 jmethodID calendar_set_time_in_millis = nullptr; 83 jmethodID calendar_add = nullptr; 84 jmethodID calendar_get = nullptr; 85 jmethodID calendar_set = nullptr; 86 jint calendar_zone_offset; 87 jint calendar_dst_offset; 88 jint calendar_year; 89 jint calendar_month; 90 jint calendar_day_of_year; 91 jint calendar_day_of_month; 92 jint calendar_day_of_week; 93 jint calendar_hour_of_day; 94 jint calendar_minute; 95 jint calendar_second; 96 jint calendar_millisecond; 97 jint calendar_sunday; 98 jint calendar_monday; 99 jint calendar_tuesday; 100 jint calendar_wednesday; 101 jint calendar_thursday; 102 jint calendar_friday; 103 jint calendar_saturday; 104 105 // java.util.TimeZone 106 ScopedGlobalRef<jclass> timezone_class; 107 jmethodID timezone_get_timezone = nullptr; 108 109 // java.net.URLEncoder 110 ScopedGlobalRef<jclass> urlencoder_class; 111 jmethodID urlencoder_encode = nullptr; 112 113 // android.content.Context 114 ScopedGlobalRef<jclass> context_class; 115 jmethodID context_get_package_name = nullptr; 116 jmethodID context_get_system_service = nullptr; 117 118 // android.net.Uri 119 ScopedGlobalRef<jclass> uri_class; 120 jmethodID uri_parse = nullptr; 121 jmethodID uri_get_scheme = nullptr; 122 jmethodID uri_get_host = nullptr; 123 124 // android.os.UserManager 125 ScopedGlobalRef<jclass> usermanager_class; 126 jmethodID usermanager_get_user_restrictions = nullptr; 127 128 // android.os.Bundle 129 ScopedGlobalRef<jclass> bundle_class; 130 jmethodID bundle_get_boolean = nullptr; 131 132 // android.content.res.Resources 133 ScopedGlobalRef<jclass> resources_class; 134 jmethodID resources_get_system = nullptr; 135 jmethodID resources_get_identifier = nullptr; 136 jmethodID resources_get_string = nullptr; 137 138 // Helper to convert lib3 UnicodeText to Java strings. 139 ScopedLocalRef<jstring> ConvertToJavaString( 140 const char* utf8_text, const int utf8_text_size_bytes) const; 141 ScopedLocalRef<jstring> ConvertToJavaString(StringPiece utf8_text) const; 142 ScopedLocalRef<jstring> ConvertToJavaString(const UnicodeText& text) const; 143 144 private: 145 explicit JniCache(JavaVM* jvm); 146 }; 147 148 } // namespace libtextclassifier3 149 150 #endif // LIBTEXTCLASSIFIER_UTILS_JAVA_JNI_CACHE_H_ 151