Package org.openlca.expressions

Class Scope

java.lang.Object

org.openlca.expressions.Scope

public final class Scope
extends Object

A scope contains bindings of variable names to expressions. Each scope has a reference to a parent scope except of the global scope. An expression can be evaluated in a scope.

Method Summary

Modifier and Type	Method	Description
void	bind(String variable, double value)	Binds the given variable to the given value in this scope.
void	bind(String variable, String expression)	Binds the given variable to the given expression in this scope.
void	clear()	Removes all variable bindings from the scope.
double	eval(String expression)	Evaluates the given expression in this scope.
Object	resolveVariable(String name)

Methods inherited from class java.lang.Object

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

Method Details

bind

public void bind(String variable,
 double value)

Binds the given variable to the given value in this scope.

bind

public void bind(String variable,
 String expression)

Binds the given variable to the given expression in this scope.

clear

public void clear()

Removes all variable bindings from the scope.

eval

public double eval(String expression)
            throws InterpreterException

Evaluates the given expression in this scope.

Throws:

InterpreterException

resolveVariable

public Object resolveVariable(String name)
                       throws InterpreterException

Throws:

InterpreterException