The map load interface package defines methods which needs to be implemented in order to provide a new map to be shown in the MapViewer. The map loader implementation is aware of the underlying layout of the map data and makes this data available through this map loader interface and the OpenLR map interface.
An implementation of the map loader interface needs to be registered as a service so that the MapViewer is able to use it during runtime. The implementation needs to be in the class path and will be found at runtime automatically. All required classes must be packaged into a jar-file including a file named
META-INF/services/openlr.map.loader.OpenLRMapLoader
The content of this text file is the fully qualified name of the map loader interface implementation.
The parameters used to load a map are defined in the interface MapLoadParameter. It defines methods for the identification and the type of a parameter. Parameters are used by the map loader to e.g. detect the location of the map data and/or to identify a region to be loaded. They may be required or optional and each parameter has a type. The type is used to present a file load dialog, a directory load dialog or a single text field.
The following interfaces are defined:
