net.sourceforge.nrl.parser.ast.action
Interface IRemoveAction

All Superinterfaces:

IAction, INRLAstNode, ISimpleAction

public interface IRemoveAction
extends ISimpleAction

An action that deletes an attribute or deletes any object that matches a set of criteria.

This action combines two quite different activities: to null out an attribute in an object; and to query for any object that match the criteria supplied in a where clause, and delete them.

Field Summary

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

NEWLINE

Method Summary

IModelReference	getTarget() The target of the deletion.
IVariable	getVariable() Return the variable that is being provided with the where clause.
IConstraint	getWhere() Return a where clause if there is one.

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

accept, dump, getColumn, getLine, getUserData, setUserData

Method Detail

getTarget

IModelReference getTarget()

The target of the deletion. This will either be an attribute-relative reference, or an element reference. Use IModelReference.getReferenceType() to determine which type applies.

Returns:

the target

getVariable

IVariable getVariable()

Return the variable that is being provided with the where clause. This will return null if there is no where clause, otherwise it will always return a variable.

Returns:

the variable

getWhere

IConstraint getWhere()

Return a where clause if there is one. This can only return a non-null value if the target is an element (rather than an attribute).

Returns:

the where clause or null