com.bigdata.rdf.sparql.ast

Interface IValueExpressionNode

All Known Implementing Classes:

AssignmentNode, ConstantNode, DummyConstantNode, ExistsNode, FunctionNode, NotExistsNode, SubqueryFunctionNodeBase, TermNode, ValueExpressionNode, VarNode

public interface IValueExpressionNode

An AST node which models a value expression.

Method Summary

Methods

Modifier and Type	Method and Description
IValueExpression<? extends IV>	getRequiredValueExpression() Return the cached IValueExpressionNode if it exists on the node.
IValueExpression<? extends IV>	getValueExpression() Return the cached IValueExpression if it exists on the node, otherwise return null.
void	invalidate() Invalidate the cached value.
void	setValueExpression(IValueExpression<? extends IV> ve) Cache the translated value expression on the node.
String	toString(int indent) A string representation of a recursive structure with pretty-print indent.

Method Detail

getValueExpression

IValueExpression<? extends IV> getValueExpression()

Return the cached IValueExpression if it exists on the node, otherwise return null.

getRequiredValueExpression

IValueExpression<? extends IV> getRequiredValueExpression()

Return the cached IValueExpressionNode if it exists on the node.

Returns:

The IValueExpressionNode and never null.

Throws:

IllegalStateException - if the IValueExpressionNode is not cached.

setValueExpression

void setValueExpression(IValueExpression<? extends IV> ve)

Cache the translated value expression on the node.

invalidate

void invalidate()

Invalidate the cached value. It will be recomputed again on demand.

toString

String toString(int indent)

A string representation of a recursive structure with pretty-print indent.

Parameters:

indent -

Returns: