Experiment with dmn generation #89
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| package org.prestoncabe.generators; | ||
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| import org.kie.dmn.model.v1_2.*; | ||
| import org.kie.dmn.model.v1_2.dmndi.*; | ||
| import org.kie.dmn.backend.marshalling.v1x.DMNMarshallerFactory; | ||
| import javax.xml.namespace.QName; | ||
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| import java.io.File; | ||
| import java.io.FileWriter; | ||
| import java.io.IOException; | ||
| import java.nio.file.Files; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.util.UUID; | ||
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| public class SimpleKogitoDMNExample { | ||
| public static void main(String[] args) { | ||
| // Load the sample file to see how it structures QNames | ||
| try { | ||
| // Generate unique IDs | ||
| String modelId = "_" + UUID.randomUUID().toString().toUpperCase(); | ||
| String modelName = "discount_calculator"; | ||
| String namespaceURI = "https://kiegroup.org/dmn/" + UUID.randomUUID().toString(); | ||
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| // Create the DMN model definition | ||
| TDefinitions definitions = new TDefinitions(); | ||
| definitions.setId(modelId); | ||
| definitions.setName(modelName); | ||
| definitions.setNamespace(namespaceURI); | ||
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| // Set required namespaces | ||
| definitions.setTypeLanguage("http://www.omg.org/spec/DMN/20180521/FEEL/"); | ||
| definitions.getNsContext().put("dmn", "http://www.omg.org/spec/DMN/20180521/MODEL/"); | ||
| definitions.getNsContext().put("feel", "http://www.omg.org/spec/DMN/20180521/FEEL/"); | ||
| definitions.getNsContext().put("kie", "http://www.drools.org/kie/dmn/1.2"); | ||
| definitions.getNsContext().put("dmndi", "http://www.omg.org/spec/DMN/20180521/DMNDI/"); | ||
| definitions.getNsContext().put("di", "http://www.omg.org/spec/DMN/20180521/DI/"); | ||
| definitions.getNsContext().put("dc", "http://www.omg.org/spec/DMN/20180521/DC/"); | ||
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| // Create input data node | ||
| TInputData purchaseAmountInput = new TInputData(); | ||
| String purchaseInputId = "_" + UUID.randomUUID().toString().toUpperCase(); | ||
| purchaseAmountInput.setId(purchaseInputId); | ||
| purchaseAmountInput.setName("Purchase Amount"); | ||
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| // Create input variable | ||
| TInformationItem purchaseVariable = new TInformationItem(); | ||
| purchaseVariable.setId("_" + UUID.randomUUID().toString().toUpperCase()); | ||
| purchaseVariable.setName("Purchase Amount"); | ||
| purchaseVariable.setTypeRef(new QName("number")); | ||
| purchaseAmountInput.setVariable(purchaseVariable); | ||
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| // Create decision node | ||
| TDecision discountDecision = new TDecision(); | ||
| String decisionId = "_" + UUID.randomUUID().toString().toUpperCase(); | ||
| discountDecision.setId(decisionId); | ||
| discountDecision.setName("Discount Amount"); | ||
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| // Create decision variable | ||
| TInformationItem decisionVariable = new TInformationItem(); | ||
| decisionVariable.setId("_" + UUID.randomUUID().toString().toUpperCase()); | ||
| decisionVariable.setName("Discount Amount"); | ||
| decisionVariable.setTypeRef(new QName("number")); | ||
| discountDecision.setVariable(decisionVariable); | ||
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| // Create literal expression | ||
| TLiteralExpression expression = new TLiteralExpression(); | ||
| String expressionId = "_" + UUID.randomUUID().toString().toUpperCase(); | ||
| expression.setId(expressionId); | ||
| expression.setText("if Purchase Amount > 100 then Purchase Amount * 0.1 else 0"); | ||
| discountDecision.setExpression(expression); | ||
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| // Create information requirement | ||
| TInformationRequirement requirement = new TInformationRequirement(); | ||
| String requirementId = "_" + UUID.randomUUID().toString().toUpperCase(); | ||
| requirement.setId(requirementId); | ||
| TDMNElementReference reference = new TDMNElementReference(); | ||
| reference.setHref("#" + purchaseInputId); | ||
| requirement.setRequiredInput(reference); | ||
| discountDecision.getInformationRequirement().add(requirement); | ||
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| // Add nodes to definitions | ||
| definitions.getDrgElement().add(purchaseAmountInput); | ||
| definitions.getDrgElement().add(discountDecision); | ||
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| // Marshal to XML | ||
| String dmnXML = DMNMarshallerFactory.newDefaultMarshaller().marshal(definitions); | ||
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| // Add DMNDI using string manipulation | ||
| String dmndiXml = createDMNDI(purchaseInputId, decisionId, requirementId); | ||
| dmnXML = dmnXML.replace("</dmn:definitions>", dmndiXml + "\n</dmn:definitions>"); | ||
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| // Save the file | ||
| Path resourcesPath = Paths.get("src", "main", "resources"); | ||
| Files.createDirectories(resourcesPath); | ||
| File dmnFile = new File(resourcesPath.toFile(), "discount-calculator.dmn"); | ||
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| try (FileWriter writer = new FileWriter(dmnFile)) { | ||
| writer.write(dmnXML); | ||
| System.out.println("DMN file saved to: " + dmnFile.getAbsolutePath()); | ||
| } | ||
| } catch (Exception e) { | ||
| e.printStackTrace(); | ||
| } | ||
| } | ||
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| private static String createDMNDI(String inputId, String decisionId, String requirementId) { | ||
| StringBuilder dmndi = new StringBuilder(); | ||
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| dmndi.append(" <dmndi:DMNDI>\n"); | ||
| dmndi.append(" <dmndi:DMNDiagram id=\"_" + UUID.randomUUID().toString().toUpperCase() + "\" name=\"DRG\">\n"); | ||
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| // Input shape | ||
| dmndi.append(" <dmndi:DMNShape id=\"dmnshape-" + inputId + "\" dmnElementRef=\"" + inputId + "\" isCollapsed=\"false\">\n"); | ||
| dmndi.append(" <dmndi:DMNStyle>\n"); | ||
| dmndi.append(" <dmndi:FillColor red=\"255\" green=\"255\" blue=\"255\"/>\n"); | ||
| dmndi.append(" <dmndi:StrokeColor red=\"0\" green=\"0\" blue=\"0\"/>\n"); | ||
| dmndi.append(" <dmndi:FontColor red=\"0\" green=\"0\" blue=\"0\"/>\n"); | ||
| dmndi.append(" </dmndi:DMNStyle>\n"); | ||
| dmndi.append(" <dc:Bounds x=\"100\" y=\"200\" width=\"100\" height=\"50\"/>\n"); | ||
| dmndi.append(" <dmndi:DMNLabel/>\n"); | ||
| dmndi.append(" </dmndi:DMNShape>\n"); | ||
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| // Decision shape | ||
| dmndi.append(" <dmndi:DMNShape id=\"dmnshape-" + decisionId + "\" dmnElementRef=\"" + decisionId + "\" isCollapsed=\"false\">\n"); | ||
| dmndi.append(" <dmndi:DMNStyle>\n"); | ||
| dmndi.append(" <dmndi:FillColor red=\"255\" green=\"255\" blue=\"255\"/>\n"); | ||
| dmndi.append(" <dmndi:StrokeColor red=\"0\" green=\"0\" blue=\"0\"/>\n"); | ||
| dmndi.append(" <dmndi:FontColor red=\"0\" green=\"0\" blue=\"0\"/>\n"); | ||
| dmndi.append(" </dmndi:DMNStyle>\n"); | ||
| dmndi.append(" <dc:Bounds x=\"100\" y=\"100\" width=\"100\" height=\"50\"/>\n"); | ||
| dmndi.append(" <dmndi:DMNLabel/>\n"); | ||
| dmndi.append(" </dmndi:DMNShape>\n"); | ||
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| // Edge | ||
| dmndi.append(" <dmndi:DMNEdge id=\"dmnedge-" + requirementId + "\" dmnElementRef=\"" + requirementId + "\">\n"); | ||
| dmndi.append(" <di:waypoint x=\"150\" y=\"200\"/>\n"); | ||
| dmndi.append(" <di:waypoint x=\"150\" y=\"150\"/>\n"); | ||
| dmndi.append(" </dmndi:DMNEdge>\n"); | ||
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| dmndi.append(" </dmndi:DMNDiagram>\n"); | ||
| dmndi.append(" </dmndi:DMNDI>"); | ||
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| return dmndi.toString(); | ||
| } | ||
| } |
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There was a problem hiding this comment. This is a simple DMN file that I fed to Claude to help it get the right "flavor" of DMN (the kind of DMN that the KIE DMN Editor creates). |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| <?xml version="1.0" encoding="UTF-8"?> | ||
| <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns="https://kie.apache.org/dmn/_AD4B9F15-BC2F-4E75-BD9B-ADFE6962DEAB" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:dc="http://www.omg.org/spec/DMN/20180521/DC/" id="_FCAE7C08-87D4-44F9-BCC1-0F7E62E225BA" name="addFive" typeLanguage="http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kie.apache.org/dmn/_AD4B9F15-BC2F-4E75-BD9B-ADFE6962DEAB"> | ||
| <dmn:extensionElements/> | ||
| <dmn:inputData id="_7D454F11-A7AC-4EE9-AD11-1F78C712AA5D" name="inputNumber"> | ||
| <dmn:extensionElements/> | ||
| <dmn:variable id="_C01A1FA4-80B6-44C8-A29C-17094DF56D5B" name="inputNumber" typeRef="number"/> | ||
| </dmn:inputData> | ||
| <dmn:decision id="_8F6EDC09-8F81-48CD-9AEE-43397830BD45" name="inputNumberPlusFive"> | ||
| <dmn:extensionElements/> | ||
| <dmn:variable id="_147B757E-0320-431A-BE58-ECC7AA43E8BE" name="inputNumberPlusFive" typeRef="number"/> | ||
| <dmn:informationRequirement id="_7BBEF904-499E-4340-9F83-AAA12DADF8F3"> | ||
| <dmn:requiredInput href="#_7D454F11-A7AC-4EE9-AD11-1F78C712AA5D"/> | ||
| </dmn:informationRequirement> | ||
| <dmn:literalExpression id="_F377F036-3C75-411B-967B-F74836CD5571"> | ||
| <dmn:text>inputNumber + 5</dmn:text> | ||
| </dmn:literalExpression> | ||
| </dmn:decision> | ||
| </dmn:definitions> |
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There was a problem hiding this comment. This is example output of the |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,41 @@ | ||
| <?xml version="1.0" ?> | ||
| <dmn:definitions xmlns:dmn="http://www.omg.org/spec/DMN/20180521/MODEL/" xmlns:di="http://www.omg.org/spec/DMN/20180521/DI/" xmlns:kie="http://www.drools.org/kie/dmn/1.2" xmlns:feel="http://www.omg.org/spec/DMN/20180521/FEEL/" xmlns:dmndi="http://www.omg.org/spec/DMN/20180521/DMNDI/" xmlns:dc="http://www.omg.org/spec/DMN/20180521/DC/" id="_5B0D489F-050A-4CB0-8B45-6B4216FA14C5" name="discount_calculator" expressionLanguage="http://www.omg.org/spec/DMN/20180521/FEEL/" typeLanguage="http://www.omg.org/spec/DMN/20180521/FEEL/" namespace="https://kiegroup.org/dmn/3f9882bf-91c9-4ab8-ad14-2048ff8f2fb8"> | ||
| <dmn:inputData id="_A2D6E8D4-82BE-4EA5-A062-B9DA2F5D4B78" name="Purchase Amount"> | ||
| <dmn:variable id="_98473C3D-E491-4598-B5C8-25D00A0D7D76" name="Purchase Amount" typeRef="number"></dmn:variable> | ||
| </dmn:inputData> | ||
| <dmn:decision id="_A93D986E-FEEB-4513-B64E-06B415E78C92" name="Discount Amount"> | ||
| <dmn:variable id="_4EAAD655-0267-4BBA-8EA0-900A738249D4" name="Discount Amount" typeRef="number"></dmn:variable> | ||
| <dmn:informationRequirement id="_9652170E-F108-4FA1-AE9D-31BE6265C2DE"> | ||
| <dmn:requiredInput href="#_A2D6E8D4-82BE-4EA5-A062-B9DA2F5D4B78"></dmn:requiredInput> | ||
| </dmn:informationRequirement> | ||
| <dmn:literalExpression id="_612AC39F-FD99-4A85-AC79-283493BF9470"> | ||
| <dmn:text>if Purchase Amount > 100 then Purchase Amount * 0.1 else 0</dmn:text> | ||
| </dmn:literalExpression> | ||
| </dmn:decision> | ||
| <dmndi:DMNDI> | ||
| <dmndi:DMNDiagram id="_D30E7BAF-B0AB-44D4-9C93-C5FD1412F8B3" name="DRG"> | ||
| <dmndi:DMNShape id="dmnshape-_A2D6E8D4-82BE-4EA5-A062-B9DA2F5D4B78" dmnElementRef="_A2D6E8D4-82BE-4EA5-A062-B9DA2F5D4B78" isCollapsed="false"> | ||
| <dmndi:DMNStyle> | ||
| <dmndi:FillColor red="255" green="255" blue="255"/> | ||
| <dmndi:StrokeColor red="0" green="0" blue="0"/> | ||
| <dmndi:FontColor red="0" green="0" blue="0"/> | ||
| </dmndi:DMNStyle> | ||
| <dc:Bounds x="100" y="200" width="100" height="50"/> | ||
| <dmndi:DMNLabel/> | ||
| </dmndi:DMNShape> | ||
| <dmndi:DMNShape id="dmnshape-_A93D986E-FEEB-4513-B64E-06B415E78C92" dmnElementRef="_A93D986E-FEEB-4513-B64E-06B415E78C92" isCollapsed="false"> | ||
| <dmndi:DMNStyle> | ||
| <dmndi:FillColor red="255" green="255" blue="255"/> | ||
| <dmndi:StrokeColor red="0" green="0" blue="0"/> | ||
| <dmndi:FontColor red="0" green="0" blue="0"/> | ||
| </dmndi:DMNStyle> | ||
| <dc:Bounds x="100" y="100" width="100" height="50"/> | ||
| <dmndi:DMNLabel/> | ||
| </dmndi:DMNShape> | ||
| <dmndi:DMNEdge id="dmnedge-_9652170E-F108-4FA1-AE9D-31BE6265C2DE" dmnElementRef="_9652170E-F108-4FA1-AE9D-31BE6265C2DE"> | ||
| <di:waypoint x="150" y="200"/> | ||
| <di:waypoint x="150" y="150"/> | ||
| </dmndi:DMNEdge> | ||
| </dmndi:DMNDiagram> | ||
| </dmndi:DMNDI> | ||
| </dmn:definitions> |
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This file demonstrates using KIE Java libraries to create a new DMN file. You can execute the code with
mvn compile exec:java -Dexec.mainClass=org.prestoncabe.generators.SimpleKogitoDMNExample