ch.maxant.rules

Class SubRule

java.lang.Object

ch.maxant.rules.Rule

ch.maxant.rules.SubRule

All Implemented Interfaces:

Comparable<Rule>

public class SubRule
extends Rule

A sub rule can be used to make rules which are built up from partial expressions and expressions contained in (sub)rules. A sub rule will never have an associated action executed, rather it will only ever be evaluated, as part of the evaluation of a rule which references it. Rules may reference sub rules within the same namespace, using the '#' character. E.g.:

SubRule 1: input.age > 30
SubRule 2: input.height < 100
Rule 3: #1 && !#2

Constructor Summary

Constructors

Constructor and Description
SubRule(String name, String expression, String namespace) See SubRule(String, String, String, String), just without a description.
SubRule(String name, String expression, String namespace, String description)

Method Summary

Methods inherited from class ch.maxant.rules.Rule

compareTo, equals, getDescription, getExpression, getFullyQualifiedName, getName, getNamespace, getOutcome, getPriority, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SubRule

public SubRule(String name,
               String expression,
               String namespace,
               String description)

Parameters:

name - The name of the rule. Should be unique within the namespace (checked when adding rules to the engine).

expression - the rule, expressed in expression language. all variables must come from the bean called "input". The rule MUST evaluate to "true" if it is to be a candidate for execution.

namespace - For a sub rule to be used by a rule, it must have the same namespace as the rule.

description - A description to help manage rules.

SubRule

public SubRule(String name,
               String expression,
               String namespace)

See SubRule(String, String, String, String), just without a description.