Our old Jackson plugin has never been much more than a fun experiment from the early days of the code generation plugin system. With the introduction of the json1 extension in SQLite 3.9.0, it made sense to rewrite that plugin to be a significantly more powerful extension that can take advantage of the new features when connecting to SQLite builds that support them.
This rewrite comes with two major feature additions:
The squidb-json-compiler module now supports properties annotated with @JSONField for serializing arbitrary objects (POJOs, Lists, Maps, etc.) to a JSON string and storing that string in a column. This requires providing a JSON serialization engine implementing the simple new JSONMapper. The major advantage besides being able to support arbitrary objects is that the serialization is library-agnostic; any JSON library can be used to support the serialization/deserialization. Two simple examples of such implementations can be found in the JSONTestCase class, using Jackson and Gson as the libraries for serialization.
The squidb-json-plugin runtime module adds support for the json1 functions for examining/manipulating JSON strings directly from SQL. These functions are declared in a JSONFunctions class, similar to the existing SquiDB Functions class for built-in SQL functions. Obviously these functions will only work if connecting to a SQLite build with the json1 extension enabled, so the squidb-sqlite-bindings project now enables this extension in its precompiled SQLite build by default.
All modules in the squidb-json addon are now plain jars with no Android dependencies. We only test on Android at the moment, but theoretically there's no reason why this couldn't also work on iOS under j2objc given an iOS-compatible implementation of JSONMapper.
jdkoren
commented
8 years ago
Our old Jackson plugin has never been much more than a fun experiment from the early days of the code generation plugin system. With the introduction of the json1 extension in SQLite 3.9.0, it made sense to rewrite that plugin to be a significantly more powerful extension that can take advantage of the new features when connecting to SQLite builds that support them.
This rewrite comes with two major feature additions:
squidb-json-compilermodule now supports properties annotated with@JSONFieldfor serializing arbitrary objects (POJOs, Lists, Maps, etc.) to a JSON string and storing that string in a column. This requires providing a JSON serialization engine implementing the simple newJSONMapper. The major advantage besides being able to support arbitrary objects is that the serialization is library-agnostic; any JSON library can be used to support the serialization/deserialization. Two simple examples of such implementations can be found in theJSONTestCaseclass, using Jackson and Gson as the libraries for serialization.squidb-json-pluginruntime module adds support for the json1 functions for examining/manipulating JSON strings directly from SQL. These functions are declared in aJSONFunctionsclass, similar to the existing SquiDBFunctionsclass for built-in SQL functions. Obviously these functions will only work if connecting to a SQLite build with the json1 extension enabled, so the squidb-sqlite-bindings project now enables this extension in its precompiled SQLite build by default.All modules in the squidb-json addon are now plain jars with no Android dependencies. We only test on Android at the moment, but theoretically there's no reason why this couldn't also work on iOS under j2objc given an iOS-compatible implementation of
JSONMapper.