Package jmri.spi

Interfaces that can be implemented outside the JMRI.jar file to implement new behavior in JMRI. Implementing classes need to be included in the containing JAR's META-INF.services directory per the Java Service Provider Interface (SPI) standards. The JmriServiceProviderInterface interface serves to identify the semantics of being a JMRI-specific SPI. Within the JMRI code, it is possible to use @org.openide.util.lookup.ServiceProvider(service = INTERFACE) just before the class declaration to have the class automatically included in the JAR's META-INF.services directory, where INTERFACE is the interface to be implemented.
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