org.tensorics.core.tree.domain

Interface Expression<R>

Type Parameters:

R - the type of the resulting value

All Superinterfaces:

Node, java.io.Serializable

All Known Subinterfaces:

ExceptionHandlingNode<R>

All Known Implementing Classes:

AbstractDeferredExpression, AnalysisExpression, AnyIterableConversionExpression, AssertionExpression, BinaryOperationExpression, BinaryPredicateExpression, BinaryPredicateIterableExpression, ConversionOperationExpression, CreationOperationExpression, DiscreteFunctionToIterableExpression, DoubleScript, FunctionalExpression, IsEqualToExpression, IsNotEqualExpression, IterableExpressionToIterable, IterableOperationExpression, IterableResolvingExpression, LatestOfExpression, PickExpression, Placeholder, PreconditionExpression, PredicateExpression, ResolvedExpression, TensoricScript, UnaryOperationExpression

public interface Expression<R>
extends Node, java.io.Serializable

An expression is a placeholder for concrete value (called 'resolved' in the following) or a value which has to still be evaluated (deferred).

Method Summary

Modifier and Type	Method and Description
R	get() Retrieves the value of the expression.
boolean	isResolved() returns true if the expression contains a concrete value.

Methods inherited from interface org.tensorics.core.tree.domain.Node

getChildren

Method Detail

isResolved

boolean isResolved()

returns true if the expression contains a concrete value. Thus the method get() can be used to retrieve the actual value. If this method returns false, then the get method will throw an exception.

Returns:

true if the value can be retrieved, false otherwise.

get

R get()

Retrieves the value of the expression. If the expression is deferred, then an expression will be thrown.

Returns:

the value of the expression.

Throws:

ExpressionIsUnresolvedException - if the value is not determined.