Package org.evrete.api

Interface RhsContext

public interface RhsContext

Rule activation context that provides access to the rule's variables and working memory methods.

  • Method Details

    • insert

      default RhsContext insert(Object obj)
      Parameters:
      obj - fact to insert
      Returns:
      RHS context
      See Also:

    • insert

      RhsContext insert(Object fact, boolean resolveCollections)

      Buffers a new insert operation in rule's memory

      Parameters:
      fact - object to insert
      resolveCollections - collection/array inspection flag
      Returns:
      RHS context
      Throws:
      NullPointerException - if argument is null

    • insert

      default RhsContext insert(Collection<?> objects)

    • insert

      default RhsContext insert(Object[] objects)

    • update

      RhsContext update(Object obj)

      This method lets the working memory know that one of its objects has changed. Always call this method to get conditions re-evaluated, and avoid calling it if the changes are not relevant to the conditions.

      Parameters:
      obj - the changed object
      Returns:
      the context itself so the methods could be chained

    • delete

      RhsContext delete(Object obj)

      This method removes an instance from the working memory.

      Parameters:
      obj - the object to remove
      Returns:
      the context itself so the methods could be chained

    • getRule

      RuntimeRule getRule()

      A convenience method that returns reference to the current rule and its environment.

      Returns:
      current rule

    • getRuntime

      default RuleSession<?> getRuntime()

      Provides access to the runtime context, an equivalent to getRule().getRuntime().

      Returns:
      runtime context (session)

    • deleteFact

      default RhsContext deleteFact(String factRef)

    • updateFact

      default RhsContext updateFact(String factRef)

    • getObject

      Object getObject(String name)

      Returns current fact by its name

      Parameters:
      name - the fact name
      Returns:
      current instance

    • get

      default <T> T get(String name)

      A typed version of the getObject() method.

      Type Parameters:
      T - cast type
      Parameters:
      name - fact name
      Returns:
      current instance