sleep.bridges
Class BasicNumbers

java.lang.Object
  sleep.bridges.BasicNumbers

All Implemented Interfaces:

Loadable, Operator, Predicate

public class BasicNumbers

extends Object

implements Predicate, Operator, Loadable

provides some of the basic number crunching functionality

Field Summary

static Class	TYPE_DOUBLE
static Class	TYPE_INT
static Class	TYPE_LONG

Constructor Summary

BasicNumbers()

Method Summary

boolean	decide(String n, ScriptInstance i, Stack l) decides the truthfulness of the proposition predicateName applied to the passedInTerms.
Scalar	operate(String o, ScriptInstance i, Stack locals) apply operator operatorName on the values in the stack.
boolean	scriptLoaded(ScriptInstance aScript) called when a script is loaded
boolean	scriptUnloaded(ScriptInstance aScript) called when a script is unloaded

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TYPE_LONG

public static Class TYPE_LONG

TYPE_INT

public static Class TYPE_INT

TYPE_DOUBLE

public static Class TYPE_DOUBLE

Constructor Detail

BasicNumbers

public BasicNumbers()

Method Detail

scriptUnloaded

public boolean scriptUnloaded(ScriptInstance aScript)

Description copied from interface: Loadable

called when a script is unloaded

Specified by:

scriptUnloaded in interface Loadable

scriptLoaded

public boolean scriptLoaded(ScriptInstance aScript)

Description copied from interface: Loadable

called when a script is loaded

Specified by:

scriptLoaded in interface Loadable

decide

public boolean decide(String n,
                      ScriptInstance i,
                      Stack l)

Description copied from interface: Predicate

decides the truthfulness of the proposition predicateName applied to the passedInTerms.

Specified by:

decide in interface Predicate

Parameters:

n - a predicate i.e. ==

i - an instance of the script asking about this predicate.

l - 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.

operate

public Scalar operate(String o,
                      ScriptInstance i,
                      Stack locals)

Description copied from interface: Operator

apply operator operatorName on the values in the stack.

Specified by:

operate in interface Operator

Parameters:

o - the name of the operator, for example the String "+"

i - instance of the script calling this operator

locals - a stack containing values the operator is to be applied to: [left hand side, right hand side]

Returns:

a Scalar containing the result of the operatorName applied to the passedInLocals, in the case of "+" applied to [4, 3] we would get a Scalar containing the integer 7.