Package sleep.bridges

Class BasicUtilities

    • Constructor Summary

      Constructors 
      Constructor Description
      BasicUtilities()  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      boolean decide​(java.lang.String predName, ScriptInstance anInstance, java.util.Stack terms)
      decides the truthfulness of the proposition predicateName applied to the passedInTerms.
      Scalar evaluate​(java.lang.String n, ScriptInstance i, java.util.Stack l)
      Evaluate a function and return the resulting scalar.
      void scriptLoaded​(ScriptInstance i)
      called when a script is loaded
      void scriptUnloaded​(ScriptInstance i)
      called when a script is unloaded
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Constructor Detail

      • BasicUtilities

        public BasicUtilities()
    • Method Detail

      • decide

        public boolean decide​(java.lang.String predName,
                              ScriptInstance anInstance,
                              java.util.Stack terms)
        Description copied from interface: Predicate
        decides the truthfulness of the proposition predicateName applied to the passedInTerms.
        Specified by:
        decide in interface Predicate
        Parameters:
        predName - a predicate i.e. ==
        anInstance - an instance of the script asking about this predicate.
        terms - a stack of terms i.e. [3, 4]. These arguments are passed in REVERSE ORDER i.e. [right hand side, left hand side]
        Returns:
        a boolean, in the case of a predicate == and the terms [3, 4] we know 3 == 4 is false so return false.
      • evaluate

        public Scalar evaluate​(java.lang.String n,
                               ScriptInstance i,
                               java.util.Stack l)
        Description copied from interface: Function
        Evaluate a function and return the resulting scalar. Only the sleep interpreter should ever call this function. If you have a maddening desire to call this Function object yourself, then use the convienence method in SleepUtils.
        Specified by:
        evaluate in interface Function
        Parameters:
        n - the function being called.
        i - an instance of the script calling this function.
        l - a stack containing the locals passed to this function. The locals are Scalar values passed in reverse order i.e. [arg n, arg n-1, ..., arg 1, arg 0]
        Returns:
        an instance of Scalar containing the return value of this function.
        See Also:
        SleepUtils.runCode(Function, String, ScriptInstance, Stack)