ilog.rules.brl.value.info

Class IlrConstraintValueChecker

java.lang.Object

ilog.rules.brl.value.info.IlrConstraintValueChecker

All Implemented Interfaces:

IlrValueChecker

public abstract class IlrConstraintValueChecker
extends java.lang.Object
implements IlrValueChecker

Implements a value checker that looks up for a constraint registered on a placeholder role to check if a given value complies with the constraint. A constraint value checker should be used on a phrase placeholer role.

Constructor Summary

Constructors

Constructor and Description
IlrConstraintValueChecker()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	accept(java.lang.Object ref, java.lang.Object value) Accepts or rejects the value found in the referenced role.
boolean	check(java.lang.Object value, IlrSyntaxTree.Node node, IlrValueError valueError) Checks if the given value is acceptable in the given branch of the Abstract Syntax Tree.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IlrConstraintValueChecker

public IlrConstraintValueChecker()

Method Detail

check

public boolean check(java.lang.Object value,
                     IlrSyntaxTree.Node node,
                     IlrValueError valueError)

Description copied from interface: IlrValueChecker

Checks if the given value is acceptable in the given branch of the Abstract Syntax Tree. This method is invoked when parsing the rule with values and concept instances used in the rule. This method is also invoked with concept instances only when building predictions in rule editors. In this case this checker is used to filter predicted concept instances and a null valueError is passed to this method.

Specified by:

check in interface IlrValueChecker

Parameters:

value - The value which can be a literal or a Concept Instance.

node - The parent node under which the value is added .

valueError - The error that can be filled to parameterize the error message. That parameter can be null when no error message is reported.

Returns:

true if the given value is accepted, and false otherwise.

accept

protected abstract boolean accept(java.lang.Object ref,
                                  java.lang.Object value)

Accepts or rejects the value found in the referenced role. This method is called during the checking of the value.

Parameters:

ref - The referenced value associated to the referenced placeholder role in the Abstract Syntax Tree. This reference is not null.

value - The actual value being checked.

Returns:

true to accept the value, false to reject it.