org.tensorics.core.tree.domain

Interface ResolvingContext

All Known Subinterfaces:

EditableResolvingContext

All Known Implementing Classes:

ResolvingContextImpl

public interface ResolvingContext

A container for resolved expressions which can be used by resolvers of expressions that need these results.

Method Summary

Modifier and Type	Method and Description
<R,E extends Expression<R>> R	resolvedValueOf(E expression) Retrieves the resolved value for the expression.
<E extends Expression<?>> boolean	resolves(E expression) Checks if the expression is resolved within this context.
int	size() Retrieves the amount of resolved values which are stored in the context.

Method Detail

resolves

<E extends Expression<?>> boolean resolves(E expression)

Checks if the expression is resolved within this context. Only if this method returns true, then it is safe to call the resolvedValueOf(Expression) method. An expression is seen as resolved, either if the context knows already the resolved value or, if the given expression is a resolved expression by itself.

Parameters:

expression - the expression for which to check if it is resolved

Returns:

true if the expression is resolved within the context, false if not

resolvedValueOf

<R,E extends Expression<R>> R resolvedValueOf(E expression)

Retrieves the resolved value for the expression. This action can be completed, if the result of the given expression is already known within the context, or if the expression is a resolved expression itself.

An IllegalArgumentException will be thrown, if the expression cannot be resolved within the context. Therefore it is mandatory to call the resolves(Expression) method first to check if the expression is resolved in the context.

Parameters:

expression - the expression for which to retrieve the resolved value

Returns:

the resolved value for the expression

size

int size()

Retrieves the amount of resolved values which are stored in the context.

Returns:

the number of stored resolved values