ObjectBox Java is an open-source, embedded NoSQL database library for Java and Kotlin, targeting Android, JVM, and desktop platforms. It provides a high-performance, native-backed object persistence engine with type-safe querying, reactive data observation, object relations (ToMany/ToOne), vector search via HNSW indexes, and optional client-server or mesh peer-to-peer synchronization. The code is organized into multiple Gradle modules including a core `objectbox-java` module with JNI bindings, an annotation API (`objectbox-java-api`), Kotlin extensions, RxJava 2/3 adapters, Android-specific integrations (LiveData, Admin web UI, Paging DataSource), and a mesh sync module using Google Nearby Connections. The architecture is library-centric with a clear separation between Java-facing API, internal serialization (vendored FlatBuffers), and native runtime. Extensive unit and integration tests cover core CRUD, transactions, queries, relations, sync, and error handling. The repository is actively maintained with a version 6.0.0-beta, publishes to Maven Central, and uses multi-platform CI (GitLab, Jenkins). While the codebase includes some legacy APIs and generated FlatBuffers code, the core abstractions exhibit solid software engineering practices with reusable patterns for reactive subscriptions, property converters, and cross-platform native library loading.
This is an Android application named 'Notifications Recovery' that captures, stores, and displays device notifications locally. It runs a NotificationListenerService to intercept all incoming notifications, parses their content (title, text, big text, conversation title, etc.), and persists them to an ObjectBox embedded database. It also detects when notifications are removed and marks them as deleted. The app provides multiple UI screens: a main list of all notifications with search/filter, a chat-style view for messaging apps (using Jetpack Compose), a pie chart for app-wise statistics, and a separate view for deleted notifications. It includes blacklist/whitelist filtering, encrypted ZIP export/import, biometric authentication, screenshot blocking, and three Android home screen widgets (latest, chat, and deleted notifications). The architecture is a monolithic Android app with a service layer, activities using XML layouts, and selected Compose screens. Dependencies include ObjectBox, MPAndroidChart, Zip4j, and AndroidX libraries. The codebase shows active maintenance but suffers from inconsistent version numbers (targeting unreleased SDK 37) and some code quality issues like threading concerns and deprecated API usage.