This is an experimental implementation of a protocol for reading data from an openLCA library. It abstracts away how data are retrieved from a library to support the following use cases:
- reading matrix and index data directly from disk (
DirectLibReader) - caching data (
CachingLibReader) - calculating columns of the inverse or intensities on demand without the need for pre-calculation (
SolvingLibReader) - support for libraries with encrypted data (
DecryptingLibReader) - support for running Monte Carlo simulations with library data (
SimulatingLibReader) - support for libraries with data quality information attached
Other implementations are possible by implementing the LibReader interface. The readers can be chained together to create readers with combined functionalities which are then added to a registry, e.g.:
var reader =
SolvingLibReader.of(
CachingLibReader.of(
DecryptingLibReader.of(
DirectLibReader.of(database, library), secret)));
libRegistry.add("library xy", reader);The plan is to pass such a registry then to the calculation back-end of openLCA which then retrieves the respective LibReader implementation for a library from that registry:
var setup = CalculationSetup.of(system)
// ...
.withLibraries(libRegistry);
var result = SystemCalculator.of(db, setup)
.calculate();
// use result ...
result.dispose(); // will also dispose library resources