规则引挚NxBRE文档纪要--流引挚简介(二)

上一篇都写总体上的认识,现在开始具体点,先把规则文件贴出来

<?xml version="1.0" encoding="UTF-8"?>
<xBusinessRules xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="xBusinessRules.xsd">
    <!-- global values -->
    <Integer id="10i" value="10"/>
    <Integer id="40i" value="40"/>  
    <ObjectLookup id="QuantityOrdered" objectId="CurrentOrder" member="Quantity"/>
    <Logic>
        <If>
            <And>
                <GreaterThanEqualTo leftId="ClientRating" rightId="ClientRatingThreshold">
                    <ObjectLookup id="ClientRating" objectId="CurrentOrder" member="ClientRating"/>
                    <String id="ClientRatingThreshold" value="C"/>
                </GreaterThanEqualTo>
            </And>
            <Do>
                <!-- Discount rules for high rate customers -->
                <Logic>
                    <If>
                        <And>
                            <GreaterThan leftId="QuantityOrdered" rightId="40i"/>
                        </And>
                        <Do>
                            <Evaluate id="AppliedDiscount">
                                <Parameter name="Percent" value=".7"/>
                            </Evaluate>
                        </Do>
                    </If>
                    <ElseIf>
                        <And>
                            <GreaterThan leftId="QuantityOrdered" rightId="10i"/>
                        </And>
                        <Do>
                            <Evaluate id="AppliedDiscount">
                                <Parameter name="Percent" value=".8"/>
                            </Evaluate>
                        </Do>
                    </ElseIf>
                    <Else>
                        <Evaluate id="AppliedDiscount">
                            <Parameter name="Percent" value=".9"/>
                        </Evaluate>
                    </Else>
                </Logic>
            </Do>
        </If>
        <Else>
            <!-- Discount rules for low rate customers -->
            <Logic>
                <If>
                    <And>
                        <GreaterThan leftId="QuantityOrdered" rightId="40i"/>
                    </And>
                    <Do>
                        <Evaluate id="AppliedDiscount">
                            <Parameter name="Percent" value=".9"/>
                        </Evaluate>
                    </Do>
                </If>
                <Else>
                    <Evaluate id="AppliedDiscount">
                        <Parameter name="Percent" value="1"/>
                    </Evaluate>
                </Else>
            </Logic>
        </Else>
    </Logic>
</xBusinessRules>

以下是关于上面的规则文件写的伪码
int 10i = 10;
int 40i = 40;
Order order;
QuantityOrdered = CurrentOrder.QuantityOrdered;//数量
string ClientRatingThreshold = "C";//等级