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入力を圧縮して割引を計算する以下の DMN モデルがあります。signavio のシミュレーターで実行できます。

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<definitions namespace="http://www.signavio.com/dmn/1.1/diagram/8462cb232d98419493d4ef846516a070.xml" exporterVersion="13.3.2" name="MID Example" id="id-f1fe73d348e342d2a6f0435b38ce14e6" sigExt:revisionId="9f563b074ba844d4b9d1fcd6bead7580" sigExt:revisionNumber="1" xmlns="http://www.omg.org/spec/DMN/20151101/dmn.xsd" xmlns:sig="http://www.signavio.com/dmn/1.1/diagram/8462cb232d98419493d4ef846516a070.xml" xmlns:sigExt="http://www.signavio.com/schema/dmn/1.1/" xmlns:feel="http://www.omg.org/spec/FEEL/20140401">
<extensionElements/>
<itemDefinition isCollection="false" name="calculatePriceAfterDiscount" id="id-f8c81ba73d98a8a51216f4583ed31dc9" label="Calculate Price After Discount">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="false" name="calculatePrice" id="id-e13d8570789c69dec9515bd8b9159f2d" label="Calculate Price ">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="false" name="determineDiscount" id="id-99dded75dc910f4c4b3e2f1d3471cd10" label="Determine Discount %">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="false" name="discount" id="id-e41b37d9d6d86919af6290e062ee6bbe" label="Discount">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="false" name="collateOrder2" id="id-a4abe03e2f888a7830f15614f50bc45a" label="Collate Order">
    <itemComponent isCollection="false" name="itemName" id="id-a4abe03e2f888a7830f15614f50bc45a-relation-ItemName" label="Item Name" sigExt:slotId="Item Name">
        <typeRef>feel:string</typeRef>
    </itemComponent>
    <itemComponent isCollection="false" name="itemPrice" id="id-a4abe03e2f888a7830f15614f50bc45a-relation-ItemPrice" label="Item Price" sigExt:slotId="Item Price">
        <typeRef>feel:number</typeRef>
    </itemComponent>
    <itemComponent isCollection="false" name="itemQuantity" id="id-a4abe03e2f888a7830f15614f50bc45a-relation-ItemQuantity" label="Item Quantity" sigExt:slotId="Item Quantity">
        <typeRef>feel:number</typeRef>
    </itemComponent>
</itemDefinition>
<itemDefinition isCollection="false" name="calculateTotalPrice" id="id-753285786a1cec905c139529a673b0fe" label="Calculate Total Price">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="false" name="itemPrice" id="id-1a281dc9cb860f8ffd0c4cef9485f6a0" label="Item Price ">
    <typeRef>feel:number</typeRef>
</itemDefinition>
<itemDefinition isCollection="true" name="collateOrder" id="id-8cbabc9f5673d5e84b524b68155dcb45" label="Collate Order">
    <itemComponent isCollection="false" name="itemName" id="id-8cbabc9f5673d5e84b524b68155dcb45-relation-ItemName" label="Item Name" sigExt:slotId="Item Name">
        <typeRef>feel:string</typeRef>
    </itemComponent>
    <itemComponent isCollection="false" name="itemPrice" id="id-8cbabc9f5673d5e84b524b68155dcb45-relation-ItemPrice" label="Item Price" sigExt:slotId="Item Price">
        <typeRef>feel:number</typeRef>
    </itemComponent>
    <itemComponent isCollection="false" name="itemQuantity" id="id-8cbabc9f5673d5e84b524b68155dcb45-relation-ItemQuantity" label="Item Quantity" sigExt:slotId="Item Quantity">
        <typeRef>feel:number</typeRef>
    </itemComponent>
</itemDefinition>
<itemDefinition isCollection="false" name="order" id="id-4cc8046b78214ad11657d5b06436db21" label="Order ">
    <itemComponent isCollection="true" name="price" id="id-4cc8046b78214ad11657d5b06436db21-relation-0" label="Price" sigExt:slotId="0">
        <typeRef>feel:number</typeRef>
    </itemComponent>
    <itemComponent isCollection="true" name="quantity" id="id-4cc8046b78214ad11657d5b06436db21-relation-1" label="Quantity" sigExt:slotId="1">
        <typeRef>feel:number</typeRef>
    </itemComponent>
    <itemComponent isCollection="true" name="itemName" id="id-4cc8046b78214ad11657d5b06436db21-relation-2" label="Item Name" sigExt:slotId="2">
        <typeRef>feel:string</typeRef>
    </itemComponent>
</itemDefinition>
<inputData name="collateOrder_iterator" id="id-4835f35ebd354e9d65c600afb02d9d3c" label="Collate Order" sigExt:shapeId="sid-139D76F2-2029-4058-B488-9472C5BBEBC6" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:collateOrder2" name="collateOrder_iterator" id="id-4835f35ebd354e9d65c600afb02d9d3c_variable"/>
</inputData>
<inputData name="order" id="id-a47f651b80111a121d93cf07939b20dc" label="Order " sigExt:shapeId="sid-8352CBF9-98EA-4018-9EAC-F17A5F936551" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:order" name="order" id="id-a47f651b80111a121d93cf07939b20dc_variable"/>
</inputData>
<decision name="calculatePriceAfterDiscount" id="id-567eb0877fe31a6d84a53c3917e4eee0" label="Calculate Price After Discount" sigExt:shapeId="sid-5F8D6179-84FD-47B9-BA88-0E3CB4305014" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:calculatePriceAfterDiscount" name="calculatePriceAfterDiscount" id="id-567eb0877fe31a6d84a53c3917e4eee0_variable"/>
    <informationRequirement>
        <requiredDecision href="#id-bc493858d94a5f245b95febc081cb0c7"/>
    </informationRequirement>
    <informationRequirement>
        <requiredDecision href="#id-d045696f950f3769011d375f7a1afd78"/>
    </informationRequirement>
    <literalExpression expressionLanguage="http://www.omg.org/spec/FEEL/20140401">
        <text>(calculatePrice-((determineDiscount/100)*calculatePrice))</text>
    </literalExpression>
</decision>
<decision name="calculateTotalPrice" id="id-be5d8465feb66b570cf75aeee595bf21" label="Calculate Total Price" sigExt:shapeId="sid-EA841422-3493-491C-9CE6-59F5EA9CE261" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:calculateTotalPrice" name="calculateTotalPrice" id="id-be5d8465feb66b570cf75aeee595bf21_variable"/>
    <informationRequirement>
        <requiredInput href="#id-4835f35ebd354e9d65c600afb02d9d3c"/>
    </informationRequirement>
    <decisionTable hitPolicy="UNIQUE">
        <input id="id-137491756d969eac658224df41ae34d3" label="Price">
            <inputExpression>
                <text>collateOrder_iterator.itemPrice</text>
            </inputExpression>
        </input>
        <input id="id-cad45b775d319f14f2cc11d5d3b758fd" label="Quantity">
            <inputExpression>
                <text>collateOrder_iterator.itemQuantity</text>
            </inputExpression>
        </input>
        <output name="calculateTotalPrice" typeRef="sig:itemPrice" id="id-99e0fdb7f0d56dbc7bb88ae025be147c" label="Calculate Total Price"/>
        <rule id="id-2fff85d2331aa1e369d698392addb0a8">
            <description>string(-)</description>
            <inputEntry>
                <text>not(null)</text>
            </inputEntry>
            <inputEntry>
                <text>not(null)</text>
            </inputEntry>
            <outputEntry>
                <text>(collateOrder_iterator.itemPrice*collateOrder_iterator.itemQuantity)</text>
            </outputEntry>
        </rule>
    </decisionTable>
</decision>
<decision name="determineDiscount" id="id-bc493858d94a5f245b95febc081cb0c7" label="Determine Discount %" sigExt:shapeId="sid-6824DDAF-771A-4773-973E-1477F70EC90B" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:determineDiscount" name="determineDiscount" id="id-bc493858d94a5f245b95febc081cb0c7_variable"/>
    <informationRequirement>
        <requiredDecision href="#id-d045696f950f3769011d375f7a1afd78"/>
    </informationRequirement>
    <decisionTable hitPolicy="UNIQUE">
        <input id="id-8a61ecb31c82e81d0b067a63f8a10b25" label="Calculate Price ">
            <inputExpression>
                <text>calculatePrice</text>
            </inputExpression>
        </input>
        <output name="determineDiscount" typeRef="sig:discount" id="id-cd2468e782346733c82b544eae541110" label="Determine Discount %"/>
        <rule id="id-8ce83be6aaf7113a136fadb09f2de83b">
            <description>string(-)</description>
            <inputEntry>
                <text>[0..500)</text>
            </inputEntry>
            <outputEntry>
                <text>1</text>
            </outputEntry>
        </rule>
        <rule id="id-ba19200060db4a933658db98400f5019">
            <description>string(-)</description>
            <inputEntry>
                <text>[500..1000)</text>
            </inputEntry>
            <outputEntry>
                <text>5</text>
            </outputEntry>
        </rule>
        <rule id="id-23a4b91a413530151413d2230f41e010">
            <description>string(-)</description>
            <inputEntry>
                <text>[1000..5000)</text>
            </inputEntry>
            <outputEntry>
                <text>10</text>
            </outputEntry>
        </rule>
        <rule id="id-9b4dbf30626d219d5e7937c1322b33fe">
            <description>string(-)</description>
            <inputEntry>
                <text>[5000..10000]</text>
            </inputEntry>
            <outputEntry>
                <text>20</text>
            </outputEntry>
        </rule>
        <rule id="id-37139385183b4a6ee481738ccccc02f4">
            <description>string(-)</description>
            <inputEntry>
                <text>&gt; 10000</text>
            </inputEntry>
            <outputEntry>
                <text>25</text>
            </outputEntry>
        </rule>
        <rule id="id-7d86977d4be287545686b09f982b55a9">
            <description>string(-)</description>
            <inputEntry>
                <text>&lt; 0</text>
            </inputEntry>
            <outputEntry>
                <text>0</text>
            </outputEntry>
        </rule>
    </decisionTable>
</decision>
<decision name="calculatePrice" id="id-d045696f950f3769011d375f7a1afd78" label="Calculate Price " sigExt:shapeId="sid-E3A6C7E0-BEE6-47C9-97EC-1C5A95EE2DB4" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements>
        <sigExt:MultiInstanceDecisionLogic>
            <sigExt:iterationExpression>collateOrder</sigExt:iterationExpression>
            <sigExt:iteratorShapeId>id-4835f35ebd354e9d65c600afb02d9d3c</sigExt:iteratorShapeId>
            <sigExt:aggregationFunction>SUM</sigExt:aggregationFunction>
            <sigExt:topLevelDecisionId>id-be5d8465feb66b570cf75aeee595bf21</sigExt:topLevelDecisionId>
        </sigExt:MultiInstanceDecisionLogic>
    </extensionElements>
    <variable typeRef="sig:calculatePrice" name="calculatePrice" id="id-d045696f950f3769011d375f7a1afd78_variable"/>
    <informationRequirement>
        <requiredDecision href="#id-85c7398c9bc186c1e2396c4625ebbcc1"/>
    </informationRequirement>
</decision>
<decision name="collateOrder" id="id-85c7398c9bc186c1e2396c4625ebbcc1" label="Collate Order" sigExt:shapeId="sid-C47674E0-8CDE-4A4A-84E8-3DD179DCF72C" sigExt:diagramId="8462cb232d98419493d4ef846516a070">
    <extensionElements/>
    <variable typeRef="sig:collateOrder" name="collateOrder" id="id-85c7398c9bc186c1e2396c4625ebbcc1_variable"/>
    <informationRequirement>
        <requiredInput href="#id-a47f651b80111a121d93cf07939b20dc"/>
    </informationRequirement>
    <literalExpression expressionLanguage="http://www.omg.org/spec/FEEL/20140401">
        <text>zip(["Item Name", "Item Price", "Item Quantity"], [order.itemName, order.price, order.quantity])</text>
    </literalExpression>
</decision>

以下のようにzipを変更しようとしました

zip(["商品名", "商品価格", "商品数量"],order.itemName, order.price, order.quantity)

Javaコードを介して実行すると、以下のエラーメッセージが表示されます

19:40:43.251 [main] エラー org.kie.dmn.feel.runtime.functions.DTInvokerFunction - デシジョン テーブル 'determineDiscount' の呼び出しエラー: ClassCastException java.lang.ClassCastException: クラス java.util.ArrayList をクラス java にキャストできません.math.BigDecimal (java.util.ArrayList と java.math.BigDecimal は、ローダー「bootstrap」のモジュール java.base にあります)

私のJavaコードは次のようになります

    final KieServices ks = KieServices.Factory.get();
    final KieFileSystem kfs = ks.newKieFileSystem();
    KieModuleModel kmm = ks.newKieModuleModel();
    kmm.setConfigurationProperty("org.kie.dmn.profiles.signavio", "org.kie.dmn.signavio.KieDMNSignavioProfile");
    kfs.writeKModuleXML(kmm.toXML());
    kfs.write(ks.getResources().newClassPathResource("MID Example (2).dmn", this.getClass()));
    KieBuilder kieBuilder = ks.newKieBuilder(kfs).buildAll();
    Results results = kieBuilder.getResults();
    logger.info("buildAll() completed.");
    results.getMessages(Message.Level.WARNING).forEach(e -> logger.warn("{}", e));
    final KieContainer kieContainer = ks.newKieContainer(ks.getRepository().getDefaultReleaseId());
    DMNRuntime runtime = kieContainer.newKieSession().getKieRuntime(DMNRuntime.class);
    DMNModel model0 = runtime.getModels().get(0);
    DMNContext context = runtime.newContext();
    Map<String, Object> item1 = new HashMap<>();
    item1.put("itemName", "item1");
    item1.put("price", 1000);
    item1.put("quantity", 100);
    Map<String, Object> item2 = new HashMap<>();
    item2.put("itemName", "item2");
    item2.put("price", 200);
    item2.put("quantity", 20);
    Map<String, Object> item3 = new HashMap<>();
    item3.put("itemName", "item3");
    item3.put("price", 3000);
    item3.put("quantity", 300);
    context.set("order", Arrays.asList(item1, item2, item3));
    DMNResult evaluateAll = runtime.evaluateAll(model0, context);
    evaluateAll.getMessages().forEach(System.out::println);
    List<DMNDecisionResult> decResutls = evaluateAll.getDecisionResults();
    printDecisionResults(decResutls);

ポインタに感謝します。

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