com.prosyst.mprm.backend.rules.spi

Interface PropertyMissing

public interface PropertyMissing

Implemented by Script Services that wish to provide dynamic fields functionality. Dynamic fields are fields that are note statically defined in the java object, but are defined at runtime, possibly depending on the interface with the underlying managed resource. For instance if my device is runtime detected as a lamp there could be dynamically provided fields isOn and maxConsumption, but if my device is a door then my dynamic fields would be isOpen and isLockable.

Script Services wishing to provide such dynamic functionality for their objects must make them implement this interface. Dynamic fields are then handled via the propertyMissing(String) which is invoked by the system whenever a non-declared field is being accessed via the groovy scripts for such an object. The propertyMissing(String) then must return the respective dynamic field value.

Method Summary

Modifier and Type	Method and Description
java.lang.Object	propertyMissing(java.lang.String propertyName) Invoked by the system whenever a non-declared field is being accessed via the groovy scripts for this object.

Method Detail

propertyMissing

java.lang.Object propertyMissing(java.lang.String propertyName)
                          throws java.lang.Exception

Invoked by the system whenever a non-declared field is being accessed via the groovy scripts for this object. The method must detect the field by its name, supplied as propertyName argument and return the respective field value.

Parameters:

propertyName - name of the dynamic field.

Returns:

value of the dynamic field.

Throws:

java.lang.Exception - thrown when whatever error appears in recognizing the field or detecting its current value.