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11.22. Removing Traits

The business logic may require that a trait is removed from a wrapped object. There are two ways to do so:

Logical don

Results in a logical insertion of the proxy resulting from the traiting operation.

then
    don( $x, // core object
         Customer.class, // trait class
         true // optional flag for logical insertion
    )

then
    don( $x, // core object
         Customer.class, // trait class
         true // optional flag for logical insertion
    )

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The shed keyword

The shed keyword causes the retraction of the proxy corresponding to the given argument type

then
    Thing t = shed( $x, GoldenCustomer.class )

then
    Thing t = shed( $x, GoldenCustomer.class )

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This operation returns another proxy implementing the org.drools.factmodel.traits.Thing interface, where the getFields() and getCore() methods are defined. Internally, all declared traits are generated to extend this interface (in addition to any others specified). This allows to preserve the wrapper with the soft fields which would otherwise be lost.

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11.22. Removing Traits

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