Question

我有一个包含44个字段的pojo类对象列表。现在我正在迭代java中的每个对象并将其传递给drool进行验证。有没有办法在drools中验证整个列表。示例代码是

rule "RuleSerialNoContent"
when
    droolRecord : DroolRecordBO(flowStatus==droolRecord.FLOW_PASS,
                               serialNo.trim() not matches "^\\d{1,10}$" )
then
    droolRecord.setRuleStatus(droolRecord.SERIAL_CONTENT_ERR+
                              " "+droolRecord.getSerialNo());
    droolRecord.setFlowStatus(droolRecord.FLOW_ERROR);
    update(droolRecord);
end


rule "RuleInstitutionIdLength"
when
    droolRecord : DroolRecordBO(flowStatus==droolRecord.FLOW_PASS,
                                institutionId.length() != 6 )
then
    droolRecord.setRuleStatus(droolRecord.INSTITUTIONID_LENGTH_ERR);
    droolRecord.setFlowStatus(droolRecord.FLOW_ERROR);
    update(droolRecord);
end

Answer 1

有可能。插入List<DroolRecordBO>并添加＆＃34;来自＆＃34;所有规则的条款：

rule "RuleSerialNoContent"
when
$list: List()
droolRecord : DroolRecordBO(flowStatus==droolRecord.FLOW_PASS,
                           serialNo.trim() not matches "^\\d{1,10}$" )
              from $list
then...

您可以省略更新，因为列表元素不再是事实。

但是，请注意：您可能无法根据此微妙变化的方案调整某些规则组合。

Answer 2

可以对对象列表执行操作。优点是你不必为每个对象承受编译时间的痛苦，而只是你只编译一次。

public static KnowledgeBase getKBase(String filePath) {

    KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
    kbuilder.add(ResourceFactory.newFileResource(filePath), ResourceType.DRL);
    KnowledgeBase kbase = kbuilder.newKnowledgeBase();
    kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());
}

public static void main(String args[]) {

    Collection<DroolRecordBO> droolRecordBOs = // Collection of DroolRecordBO
    KnowledgeBase kbase = getKBase(".drl File Path");
    StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();

    for(DroolRecordBO droolRecordBO : droolRecordBOs) {
        ksession.insert(droolRecordBO);
    }
    ksession.fireAllRules();
    ksession.dispose();
}

如果您希望按特定顺序执行规则，则可能需要考虑使用salience

流氓对象列表的验证

2 个答案: