Package org.openlca.expressions

Class FormulaInterpreter

java.lang.Object

org.openlca.expressions.FormulaInterpreter

public class FormulaInterpreter
extends Object

Constructor Summary

Constructors

Constructor	Description
FormulaInterpreter()

Method Summary

Modifier and Type	Method	Description
void	bind(String variable, double value)	Binds the given variable to the given value in the global scope of the interpreter.
void	bind(String variable, String expression)	Binds the given variable to the given expression in the global scope of the interpreter.
void	clear()	Removes all local scopes and all variable bindings of the global scope from this interpreter.
Scope	createScope(long id)	Creates a new scope with the given ID in the global scope.
Scope	createScope(long id, Scope parent)	Creates a new scope with the given ID in the parent scope.
double	eval(String expression)	Evaluates the given expression in the global scope of the interpreter.
Scope	getGlobalScope()	Returns the global scope of the interpreter.
Scope	getOrCreate(long id)
Optional<Scope>	getScope(long id)	Returns the scope with the given ID or null if no such scope is defined.
Scope	getScopeOrGlobal(long id)	Get the scope for the given ID or the global scope if no such scope exists.

Methods inherited from class java.lang.Object

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

Constructor Details

FormulaInterpreter

public FormulaInterpreter()

Method Details

clear

public void clear()

Removes all local scopes and all variable bindings of the global scope from this interpreter.

eval

public double eval(String expression)
            throws InterpreterException

Evaluates the given expression in the global scope of the interpreter.

Throws:

InterpreterException

bind

public void bind(String variable,
 String expression)

Binds the given variable to the given expression in the global scope of the interpreter.

bind

public void bind(String variable,
 double value)

Binds the given variable to the given value in the global scope of the interpreter.

getGlobalScope

public Scope getGlobalScope()

Returns the global scope of the interpreter.

createScope

public Scope createScope(long id)

Creates a new scope with the given ID in the global scope.

getOrCreate

public Scope getOrCreate(long id)

createScope

public Scope createScope(long id,
 Scope parent)

Creates a new scope with the given ID in the parent scope.

getScope

public Optional<Scope> getScope(long id)

Returns the scope with the given ID or null if no such scope is defined.

getScopeOrGlobal

public Scope getScopeOrGlobal(long id)

Get the scope for the given ID or the global scope if no such scope exists.