sleep.interfaces
Interface Operator
- BasicNumbers
public interface Operator
An operator in sleep parlance is anything used to operate on two variables inside of an expression. For example 2 + 3
is the expression add 2 and 3. The + plus sign is the operator.
Creating an Operator class and installing it into the environment makes the operator available for use within
expressions.
To install an operator into a script environment:
ScriptInstance script; // assume
Operator myOperatorBridge; // assume
Hashtable environment = script.getScriptEnvironment().getEnvironment();
environment.put("operator", myOperatorBridge);
Operator bridges probably won't be as common as other bridges. Operator bridges can be used for adding new math
operators or new string manipulation operators.
Scalar | operate(String operatorName, ScriptInstance anInstance, Stack passedInLocals) - apply operator operatorName on the values in the stack.
|
operate
public Scalar operate(String operatorName,
ScriptInstance anInstance,
Stack passedInLocals)
apply operator operatorName on the values in the stack.
operatorName
- the name of the operator, for example the String "+"anInstance
- instance of the script calling this operatorpassedInLocals
- a stack containing values the operator is to be applied to: [left hand side, right hand side]
- 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.