Package com.aquima.interactions.expressions.optimizer

Interface IExpressionNode

All Superinterfaces:

Serializable

All Known Implementing Classes:

AllExpression, ArithmeticExpression, ConditionExpression, ConstExpression, ConversionExpression, DimensionExpression, EachExpression, ExistsExpression, FieldVariableExpression, FunctionExpression, InstanceOfExpression, InversionExpression, IsActiveExpression, ListArithmeticExpression, ListConditionExpression, ListExpression, LogicalExpression, NamedVariableExpression, NotExpression, RootExpression, SelectExpression, TemplateExpression, TypeOfExpression, UnknownExpression, VariableExpression

public interface IExpressionNode
extends Serializable

The expression node interface defines the methods that all nodes from the optimizer should implement.

Since:

6.4

Author:

O. Kerpershoek

Method Summary

Modifier and Type	Method	Description
IValue	evaluate(IValueEnvironment environment)	This method evaluates the node using the environment passed as argument and returns the result as a value or null if the result is unknown.

Method Detail

evaluate

IValue evaluate(IValueEnvironment environment)

This method evaluates the node using the environment passed as argument and returns the result as a value or null if the result is unknown.

Parameters:

environment - The environment that should be used when evaluating the node.

Returns:

The result of the evaluation, or null if the result is unknown.

Throws:

ExpressionException - This exception is thrown when the node could not be evaluated due to an unexpected error.