Examples with DMNExpressionEvaluator org.kie.dmn.core.api.DMNExpressionEvaluator used on opensource projects

Example 1 with DMNExpressionEvaluator

use of org.kie.dmn.core.api.DMNExpressionEvaluator in project drools by kiegroup.

the class DMNListEvaluator method evaluate.

@Override
public EvaluatorResult evaluate(DMNRuntimeEventManager eventManager, DMNResult dmnr) {
    DMNResultImpl result = (DMNResultImpl) dmnr;
    List<Object> results = new ArrayList<>();
    DMNContext previousContext = result.getContext();
    DMNContextImpl dmnContext = (DMNContextImpl) previousContext.clone();
    result.setContext(dmnContext);
    try {
        int index = 0;
        for (DMNExpressionEvaluator ee : elements) {
            try {
                EvaluatorResult er = ee.evaluate(eventManager, result);
                if (er.getResultType() == ResultType.SUCCESS) {
                    results.add(er.getResult());
                } else {
                    MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, node, result, null, null, Msg.ERR_EVAL_LIST_ELEMENT_ON_POSITION_ON_LIST, index + 1, name);
                    return new EvaluatorResultImpl(results, ResultType.FAILURE);
                }
            } catch (Exception e) {
                MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, node, result, e, null, Msg.ERR_EVAL_LIST_ELEMENT_ON_POSITION_ON_LIST, index + 1, name);
                return new EvaluatorResultImpl(results, ResultType.FAILURE);
            } finally {
                index++;
            }
        }
    } finally {
        result.setContext(previousContext);
    }
    return new EvaluatorResultImpl(results, ResultType.SUCCESS);
}

Example 2 with DMNExpressionEvaluator

use of org.kie.dmn.core.api.DMNExpressionEvaluator in project drools by kiegroup.

the class DMNRelationEvaluator method evaluate.

@Override
public EvaluatorResult evaluate(DMNRuntimeEventManager eventManager, DMNResult dmnr) {
    DMNResultImpl result = (DMNResultImpl) dmnr;
    List<Map<String, Object>> results = new ArrayList<>();
    DMNContext previousContext = result.getContext();
    DMNContextImpl dmnContext = (DMNContextImpl) previousContext.clone();
    result.setContext(dmnContext);
    try {
        for (int rowIndex = 0; rowIndex < rows.size(); rowIndex++) {
            List<DMNExpressionEvaluator> row = rows.get(rowIndex);
            Map<String, Object> element = new HashMap<>();
            for (int i = 0; i < columns.size(); i++) {
                try {
                    EvaluatorResult er = row.get(i).evaluate(eventManager, result);
                    if (er.getResultType() == ResultType.SUCCESS) {
                        element.put(columns.get(i), er.getResult());
                    } else {
                        MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, node, result, null, null, Msg.ERR_EVAL_ROW_ELEMENT_ON_POSITION_ON_ROW_OF_RELATION, i + 1, rowIndex + 1, name);
                        return new EvaluatorResultImpl(results, ResultType.FAILURE);
                    }
                } catch (Exception e) {
                    MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, node, result, e, null, Msg.ERR_EVAL_ROW_ELEMENT_ON_POSITION_ON_ROW_OF_RELATION, i + 1, rowIndex + 1, name);
                    return new EvaluatorResultImpl(results, ResultType.FAILURE);
                }
            }
            results.add(element);
        }
    } finally {
        result.setContext(previousContext);
    }
    return new EvaluatorResultImpl(results, ResultType.SUCCESS);
}

Example 3 with DMNExpressionEvaluator

use of org.kie.dmn.core.api.DMNExpressionEvaluator in project drools by kiegroup.

the class BusinessKnowledgeModelCompiler method compileEvaluator.

@Override
public void compileEvaluator(DMNNode node, DMNCompilerImpl compiler, DMNCompilerContext ctx, DMNModelImpl model) {
    BusinessKnowledgeModelNodeImpl bkmi = (BusinessKnowledgeModelNodeImpl) node;
    compiler.linkRequirements(model, bkmi);
    ctx.enterFrame();
    try {
        for (DMNNode dep : bkmi.getDependencies().values()) {
            if (dep instanceof BusinessKnowledgeModelNode) {
                // might need to create a DMNType for "functions" and replace the type here by that
                ctx.setVariable(dep.getName(), ((BusinessKnowledgeModelNode) dep).getResultType());
            }
        }
        // to allow recursive call from inside a BKM node, a variable for self must be available for the compiler context:
        ctx.setVariable(bkmi.getName(), bkmi.getResultType());
        FunctionDefinition funcDef = bkmi.getBusinessKnowledModel().getEncapsulatedLogic();
        DMNExpressionEvaluator exprEvaluator = compiler.getEvaluatorCompiler().compileExpression(ctx, model, bkmi, bkmi.getName(), funcDef);
        bkmi.setEvaluator(exprEvaluator);
    } finally {
        ctx.exitFrame();
    }
}

Example 4 with DMNExpressionEvaluator

use of org.kie.dmn.core.api.DMNExpressionEvaluator in project drools by kiegroup.

the class DMNEvaluatorCompiler method compileDecisionTable.

private DMNExpressionEvaluator compileDecisionTable(DMNCompilerContext ctx, DMNModelImpl model, DMNBaseNode node, String dtName, DecisionTable dt) {
    java.util.List<DTInputClause> inputs = new ArrayList<>();
    int index = 0;
    for (InputClause ic : dt.getInput()) {
        index++;
        String inputExpressionText = ic.getInputExpression().getText();
        String inputValuesText = Optional.ofNullable(ic.getInputValues()).map(UnaryTests::getText).orElse(null);
        java.util.List<UnaryTest> inputValues = null;
        if (inputValuesText != null) {
            inputValues = textToUnaryTestList(ctx, inputValuesText, model, ic, Msg.ERR_COMPILING_FEEL_EXPR_ON_DT_INPUT_CLAUSE_IDX, inputValuesText, node.getIdentifierString(), index);
        } else if (ic.getInputExpression().getTypeRef() != null) {
            QName inputExpressionTypeRef = ic.getInputExpression().getTypeRef();
            BaseDMNTypeImpl typeRef = (BaseDMNTypeImpl) model.getTypeRegistry().resolveType(resolveNamespaceForTypeRef(inputExpressionTypeRef, ic.getInputExpression()), inputExpressionTypeRef.getLocalPart());
            inputValues = typeRef.getAllowedValuesFEEL();
        }
        CompiledExpression compiledInput = feel.compileFeelExpression(ctx, inputExpressionText, model, dt, Msg.ERR_COMPILING_FEEL_EXPR_ON_DT_INPUT_CLAUSE_IDX, inputExpressionText, dtName, index);
        inputs.add(new DTInputClause(inputExpressionText, inputValuesText, inputValues, compiledInput));
    }
    java.util.List<DTOutputClause> outputs = new ArrayList<>();
    index = 0;
    boolean hasOutputValues = false;
    for (OutputClause oc : dt.getOutput()) {
        String outputName = oc.getName();
        if (outputName != null) {
            DMNCompilerHelper.checkVariableName(model, node.getSource(), outputName);
        }
        String id = oc.getId();
        String outputValuesText = Optional.ofNullable(oc.getOutputValues()).map(UnaryTests::getText).orElse(null);
        String defaultValue = oc.getDefaultOutputEntry() != null ? oc.getDefaultOutputEntry().getText() : null;
        BaseDMNTypeImpl typeRef = (BaseDMNTypeImpl) DMNTypeRegistry.UNKNOWN;
        java.util.List<UnaryTest> outputValues = null;
        if (oc.getTypeRef() != null) {
            QName outputExpressionTypeRef = oc.getTypeRef();
            typeRef = (BaseDMNTypeImpl) model.getTypeRegistry().resolveType(resolveNamespaceForTypeRef(outputExpressionTypeRef, oc), outputExpressionTypeRef.getLocalPart());
            if (typeRef == null) {
                typeRef = (BaseDMNTypeImpl) DMNTypeRegistry.UNKNOWN;
            }
        } else if (dt.getOutput().size() == 1 && (dt.getParent() instanceof Decision || dt.getParent() instanceof BusinessKnowledgeModel || dt.getParent() instanceof ContextEntry)) {
            QName inferredTypeRef = recurseUpToInferTypeRef(model, oc, dt);
            // if inferredTypeRef is null, a std err will have been reported
            if (inferredTypeRef != null) {
                typeRef = (BaseDMNTypeImpl) model.getTypeRegistry().resolveType(resolveNamespaceForTypeRef(inferredTypeRef, oc), inferredTypeRef.getLocalPart());
            }
        }
        if (outputValuesText != null) {
            outputValues = textToUnaryTestList(ctx, outputValuesText, model, oc, Msg.ERR_COMPILING_FEEL_EXPR_ON_DT_OUTPUT_CLAUSE_IDX, outputValuesText, node.getIdentifierString(), ++index);
        } else if (typeRef != DMNTypeRegistry.UNKNOWN) {
            outputValues = typeRef.getAllowedValuesFEEL();
        }
        if (outputValues != null && !outputValues.isEmpty()) {
            hasOutputValues = true;
        }
        outputs.add(new DTOutputClause(outputName, id, outputValues, defaultValue, typeRef.getFeelType(), typeRef.isCollection()));
    }
    if (dt.getHitPolicy().equals(HitPolicy.PRIORITY) && !hasOutputValues) {
        MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, dt.getParent(), model, null, null, Msg.MISSING_OUTPUT_VALUES, dt.getParent());
    }
    java.util.List<DTDecisionRule> rules = new ArrayList<>();
    index = 0;
    for (DecisionRule dr : dt.getRule()) {
        DTDecisionRule rule = new DTDecisionRule(index);
        for (UnaryTests ut : dr.getInputEntry()) {
            final java.util.List<UnaryTest> tests;
            if (ut == null || ut.getText() == null || ut.getText().isEmpty()) {
                tests = Collections.emptyList();
                MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, ut, model, null, null, Msg.DTABLE_EMPTY_ENTRY, dt.getRule().indexOf(dr) + 1, dr.getInputEntry().indexOf(ut) + 1, dt.getParentDRDElement().getIdentifierString());
            } else {
                tests = textToUnaryTestList(ctx, ut.getText(), model, dr, Msg.ERR_COMPILING_FEEL_EXPR_ON_DT_RULE_IDX, ut.getText(), node.getIdentifierString(), index + 1);
            }
            rule.getInputEntry().add((c, x) -> tests.stream().anyMatch(t -> {
                Boolean result = t.apply(c, x);
                return result != null && result == true;
            }));
        }
        for (LiteralExpression le : dr.getOutputEntry()) {
            String expressionText = le.getText();
            CompiledExpression compiledExpression = feel.compileFeelExpression(ctx, expressionText, model, dr, Msg.ERR_COMPILING_FEEL_EXPR_ON_DT_RULE_IDX, expressionText, dtName, index + 1);
            rule.getOutputEntry().add(compiledExpression);
        }
        rules.add(rule);
        index++;
    }
    String policy = dt.getHitPolicy().value() + (dt.getAggregation() != null ? " " + dt.getAggregation().value() : "");
    org.kie.dmn.feel.runtime.decisiontables.HitPolicy hp = org.kie.dmn.feel.runtime.decisiontables.HitPolicy.fromString(policy);
    java.util.List<String> parameterNames = new ArrayList<>();
    if (node instanceof BusinessKnowledgeModelNode) {
        // need to break this statement down and check for nulls
        parameterNames.addAll(((BusinessKnowledgeModelNode) node).getBusinessKnowledModel().getEncapsulatedLogic().getFormalParameter().stream().map(f -> f.getName()).collect(toList()));
    } else {
        parameterNames.addAll(node.getDependencies().keySet());
    }
    // creates a FEEL instance which will be used by the invoker/impl (s)
    FEEL feelInstance = feel.newFEELInstance();
    DecisionTableImpl dti = new DecisionTableImpl(dtName, parameterNames, inputs, outputs, rules, hp, feelInstance);
    DTInvokerFunction dtf = new DTInvokerFunction(dti);
    DMNDTExpressionEvaluator dtee = new DMNDTExpressionEvaluator(node, feelInstance, dtf);
    return dtee;
}

Example 5 with DMNExpressionEvaluator

use of org.kie.dmn.core.api.DMNExpressionEvaluator in project drools by kiegroup.

the class DecisionCompiler method compileEvaluator.

@Override
public void compileEvaluator(DMNNode node, DMNCompilerImpl compiler, DMNCompilerContext ctx, DMNModelImpl model) {
    DecisionNodeImpl di = (DecisionNodeImpl) node;
    compiler.linkRequirements(model, di);
    ctx.enterFrame();
    try {
        Map<String, DMNType> importedTypes = new HashMap<>();
        for (DMNNode dep : di.getDependencies().values()) {
            if (dep instanceof DecisionNode) {
                ctx.setVariable(dep.getName(), ((DecisionNode) dep).getResultType());
            } else if (dep instanceof InputDataNode) {
                ctx.setVariable(dep.getName(), ((InputDataNode) dep).getType());
            } else if (dep instanceof BusinessKnowledgeModelNode) {
                if (dep.getModelNamespace().equals(model.getNamespace())) {
                    // might need to create a DMNType for "functions" and replace the type here by that
                    ctx.setVariable(dep.getName(), ((BusinessKnowledgeModelNode) dep).getResultType());
                } else {
                    // then the BKM dependency is an imported BKM.
                    Optional<String> alias = model.getImportAliasFor(dep.getModelNamespace(), dep.getModelName());
                    if (alias.isPresent()) {
                        CompositeTypeImpl importedComposite = (CompositeTypeImpl) importedTypes.computeIfAbsent(alias.get(), a -> new CompositeTypeImpl());
                        importedComposite.addField(dep.getName(), ((BusinessKnowledgeModelNode) dep).getResultType());
                    }
                }
            }
        }
        for (Entry<String, DMNType> importedType : importedTypes.entrySet()) {
            ctx.setVariable(importedType.getKey(), importedType.getValue());
        }
        DMNExpressionEvaluator evaluator = compiler.getEvaluatorCompiler().compileExpression(ctx, model, di, di.getName(), di.getDecision().getExpression());
        di.setEvaluator(evaluator);
    } finally {
        ctx.exitFrame();
    }
}