com.hammurapi.reasoning.spi
Annotation Type Infer

@Target(value=METHOD)
@Retention(value=RUNTIME)
public @interface Infer

This annotation indicates that method is an inference method. Rule methods can return facts and post facts (conclusions). Reasoning engine needs to know types of rule outputs. From rule class introspection the rule system knows about rule method return type, but it doesn't know about types posted through post(). Also, return type might not be enough, as returned instances may implement interfaces which other rules are interested in, but which are not declared in the rule return type. Annotation parameter allows rules to inform the inference system about posted types.

For methods without fact types information provided through annotation parameter, the rule system uses method return type.

Author:

Pavel

Optional Element Summary

int	priority
Class<?>[]	value

value

public abstract Class<?>[] value

Returns:

Conclusion types posted by this method.

Default:

{}

priority

public abstract int priority

Returns:

Inference method priority. Methods with higher priority value get invoked before methods with lower priority value. Inference method can invoke consume() method from InferenceContext to "consume" source fact(s) and prevent invocation of subsequent inference methods.

Default:

0