net.sourceforge.nrl.parser.ast.constraints
Interface IOperatorInvocation

All Superinterfaces:

IConstraint, IExpression, INRLAstNode

public interface IOperatorInvocation
extends IExpression

An operator invocation is an expression that makes use of an external undefined operator - mostly a scripted a programmed extension.

Field Summary

Fields inherited from interface net.sourceforge.nrl.parser.ast.INRLAstNode

NEWLINE

Method Summary

int	getNumParameters() Return the number of parameters passed in this invocation.
IOperator	getOperator() Return the operator.
String	getOperatorName() Return the name of the operator begin called.
IExpression	getParameter(int index) Return a parameter.

Methods inherited from interface net.sourceforge.nrl.parser.ast.constraints.IConstraint

getNRLDataType, setNRLDataType

Methods inherited from interface net.sourceforge.nrl.parser.ast.INRLAstNode

accept, dump, getColumn, getLine, getUserData, setUserData

Method Detail

getOperator

IOperator getOperator()

Return the operator. This only returns a value if the rule file has been resolved against an operator collection using INRLParser.resolveOperatorReferences(IRuleFile, IOperators[]).

Returns:

the operator

getOperatorName

String getOperatorName()

Return the name of the operator begin called. Never returns null.

Returns:

the name without any square brackets

getParameter

IExpression getParameter(int index)

Return a parameter. The parameter index must be between 0 and getNumParameters()-1, or a runtime exception will occur.

Parameters:

index - the index

Returns:

the parameter, will not be null if the index was in bounds

getNumParameters

int getNumParameters()

Return the number of parameters passed in this invocation.