org.kuali.rice.kew.rule
Class BSFRuleExpression

java.lang.Object
  org.kuali.rice.kew.rule.BSFRuleExpression

All Implemented Interfaces:

RuleExpression

Direct Known Subclasses:

AccumulatingBSFRuleExpression

public class BSFRuleExpression
extends Object
implements RuleExpression

A rule expression implementation that uses Bean Scripting Framework. The language is given by the type qualifier, e.g.: <expression type="BSF:groovy">...

Author:

Kuali Rice Team (rice.collab@kuali.org)

Nested Class Summary

protected static class

BSFRuleExpression.WorkflowRuleAPI A helper bean that is declared for use by BSF scripts.

Constructor Summary

BSFRuleExpression()

Method Summary

protected void	declareBeans(ScriptEngine engine, Rule rule, RouteContext context) Populates the BSFManager with beans that are accessible to BSF scripts.
RuleExpressionResult	evaluate(Rule rule, RouteContext context) Performs an evaluation and returns a list of 0 or more RuleResponsibilitys to which to dispatch action requests
protected String	parseLang(String type, String deflt) Parses the language component from the type string

Methods inherited from class java.lang.Object

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

Constructor Detail

BSFRuleExpression

public BSFRuleExpression()

Method Detail

evaluate

public RuleExpressionResult evaluate(Rule rule,
                                     RouteContext context)
                              throws WorkflowException

Description copied from interface: RuleExpression

Performs an evaluation and returns a list of 0 or more RuleResponsibilitys to which to dispatch action requests

Specified by:

evaluate in interface RuleExpression

Parameters:

rule - the rule that this rule expression applies to

context - the RouteContext under which the expression is being evaluated

Returns:

the result of the rule evaluation

Throws:

WorkflowException

parseLang

protected String parseLang(String type,
                           String deflt)

Parses the language component from the type string

Parameters:

type - the type string

deflt - the default language if none is present in the type string

Returns:

the language component or null

declareBeans

protected void declareBeans(ScriptEngine engine,
                            Rule rule,
                            RouteContext context)
                     throws ScriptException

Populates the BSFManager with beans that are accessible to BSF scripts. May be overridden by subclasses. The standard implementation exposes the rule and routeContext

Parameters:

manager - the BSFManager

rule - the current Rule object

context - the current RouteContext

Throws:

ScriptException