Examples with DMNBaseNode org.kie.dmn.core.ast.DMNBaseNode used on opensource projects

Example 1 with DMNBaseNode

use of org.kie.dmn.core.ast.DMNBaseNode 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 2 with DMNBaseNode

use of org.kie.dmn.core.ast.DMNBaseNode in project drools by kiegroup.

the class DMNRuntimeImpl method evaluateBKM.

private void evaluateBKM(DMNContext context, DMNResultImpl result, BusinessKnowledgeModelNode b, boolean typeCheck) {
    BusinessKnowledgeModelNodeImpl bkm = (BusinessKnowledgeModelNodeImpl) b;
    if (isNodeValueDefined(result, bkm)) {
        // TODO: do we need to check if the defined variable is a function as it should?
        return;
    }
    // TODO: do we need to check/resolve dependencies?
    if (bkm.getEvaluator() == null) {
        MsgUtil.reportMessage(logger, DMNMessage.Severity.WARN, bkm.getSource(), result, null, null, Msg.MISSING_EXPRESSION_FOR_BKM, getIdentifier(bkm));
        return;
    }
    try {
        DMNRuntimeEventManagerUtils.fireBeforeEvaluateBKM(eventManager, bkm, result);
        for (DMNNode dep : bkm.getDependencies().values()) {
            if (typeCheck && !checkDependencyValueIsValid(dep, result)) {
                MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, ((DMNBaseNode) dep).getSource(), result, null, null, Msg.ERROR_EVAL_NODE_DEP_WRONG_TYPE, getIdentifier(bkm), getIdentifier(dep), MsgUtil.clipString(result.getContext().get(dep.getName()).toString(), 50), ((DMNBaseNode) dep).getType());
                return;
            }
            if (!isNodeValueDefined(result, dep)) {
                if (dep instanceof BusinessKnowledgeModelNode) {
                    evaluateBKM(context, result, (BusinessKnowledgeModelNode) dep, typeCheck);
                } else {
                    MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, bkm.getSource(), result, null, null, Msg.REQ_DEP_NOT_FOUND_FOR_NODE, getIdentifier(dep), getIdentifier(bkm));
                    return;
                }
            }
        }
        EvaluatorResult er = bkm.getEvaluator().evaluate(this, result);
        if (er.getResultType() == EvaluatorResult.ResultType.SUCCESS) {
            FEELFunction resultFn = (FEELFunction) er.getResult();
            if (bkm.getModelNamespace().equals(result.getModel().getNamespace())) {
                // TODO check of the return type will need calculation/inference of function return type.
                result.getContext().set(bkm.getBusinessKnowledModel().getVariable().getName(), resultFn);
            } else {
                DMNModelImpl model = (DMNModelImpl) result.getModel();
                Optional<String> importAlias = model.getImportAliasFor(bkm.getModelNamespace(), bkm.getModelName());
                Map<String, Object> aliasContext = (Map) result.getContext().getAll().computeIfAbsent(importAlias.get(), x -> new LinkedHashMap<>());
                aliasContext.put(bkm.getBusinessKnowledModel().getVariable().getName(), resultFn);
            }
        }
    } catch (Throwable t) {
        MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, bkm.getSource(), result, t, null, Msg.ERROR_EVAL_BKM_NODE, getIdentifier(bkm), t.getMessage());
    } finally {
        DMNRuntimeEventManagerUtils.fireAfterEvaluateBKM(eventManager, bkm, result);
    }
}

Example 3 with DMNBaseNode

use of org.kie.dmn.core.ast.DMNBaseNode in project drools by kiegroup.

the class DMNEvaluatorCompiler method compileFunctionDefinition.

private DMNExpressionEvaluator compileFunctionDefinition(DMNCompilerContext ctx, DMNModelImpl model, DMNBaseNode node, String functionName, FunctionDefinition expression) {
    FunctionDefinition funcDef = expression;
    String kindStr = funcDef.getAdditionalAttributes().get(FunctionDefinition.KIND_QNAME);
    FunctionDefinition.Kind kind = kindStr != null ? FunctionDefinition.Kind.determineFromString(kindStr) : FunctionDefinition.Kind.FEEL;
    if (kind == null) {
        // unknown function kind
        MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, funcDef, model, null, null, Msg.FUNC_DEF_INVALID_KIND, kindStr, node.getIdentifierString());
        return new DMNFunctionDefinitionEvaluator(node.getName(), funcDef);
    } else if (kind.equals(FunctionDefinition.Kind.FEEL)) {
        ctx.enterFrame();
        try {
            DMNFunctionDefinitionEvaluator func = new DMNFunctionDefinitionEvaluator(node.getName(), funcDef);
            for (InformationItem p : funcDef.getFormalParameter()) {
                DMNCompilerHelper.checkVariableName(model, p, p.getName());
                DMNType dmnType = compiler.resolveTypeRef(model, node, p, p, p.getTypeRef());
                func.addParameter(p.getName(), dmnType);
                ctx.setVariable(p.getName(), dmnType);
            }
            DMNExpressionEvaluator eval = compileExpression(ctx, model, node, functionName, funcDef.getExpression());
            if (eval instanceof DMNLiteralExpressionEvaluator && ((DMNLiteralExpressionEvaluator) eval).isFunctionDefinition()) {
                // we need to resolve the function and eliminate the indirection
                CompiledExpression fexpr = ((DMNLiteralExpressionEvaluator) eval).getExpression();
                FEELFunction feelFunction = feel.evaluateFunctionDef(ctx, fexpr, model, funcDef, Msg.FUNC_DEF_COMPILATION_ERR, functionName, node.getIdentifierString());
                DMNInvocationEvaluator invoker = new DMNInvocationEvaluator(node.getName(), node.getSource(), functionName, new Invocation(), (fctx, fname) -> feelFunction, // feel can be null as anyway is hardcoded to `feelFunction`
                null);
                for (InformationItem p : funcDef.getFormalParameter()) {
                    invoker.addParameter(p.getName(), func.getParameterType(p.getName()), (em, dr) -> new EvaluatorResultImpl(dr.getContext().get(p.getName()), EvaluatorResult.ResultType.SUCCESS));
                }
                eval = invoker;
            }
            func.setEvaluator(eval);
            return func;
        } finally {
            ctx.exitFrame();
        }
    } else if (kind.equals(FunctionDefinition.Kind.JAVA)) {
        if (funcDef.getExpression() instanceof Context) {
            // proceed
            Context context = (Context) funcDef.getExpression();
            String clazz = null;
            String method = null;
            for (ContextEntry ce : context.getContextEntry()) {
                if (ce.getVariable() != null && ce.getVariable().getName() != null && ce.getExpression() != null && ce.getExpression() instanceof LiteralExpression) {
                    if (ce.getVariable().getName().equals("class")) {
                        clazz = stripQuotes(((LiteralExpression) ce.getExpression()).getText().trim());
                    } else if (ce.getVariable().getName().equals("method signature")) {
                        method = stripQuotes(((LiteralExpression) ce.getExpression()).getText().trim());
                    }
                }
            }
            if (clazz != null && method != null) {
                String params = funcDef.getFormalParameter().stream().map(p -> p.getName()).collect(Collectors.joining(","));
                String expr = String.format("function(%s) external { java: { class: \"%s\", method signature: \"%s\" }}", params, clazz, method);
                try {
                    FEELFunction feelFunction = feel.evaluateFunctionDef(ctx, expr, model, funcDef, Msg.FUNC_DEF_COMPILATION_ERR, functionName, node.getIdentifierString());
                    if (feelFunction != null) {
                        ((BaseFEELFunction) feelFunction).setName(functionName);
                    }
                    DMNInvocationEvaluator invoker = new DMNInvocationEvaluator(node.getName(), node.getSource(), functionName, new Invocation(), (fctx, fname) -> feelFunction, // feel can be null as anyway is hardcoded to `feelFunction`
                    null);
                    DMNFunctionDefinitionEvaluator func = new DMNFunctionDefinitionEvaluator(node.getName(), funcDef);
                    for (InformationItem p : funcDef.getFormalParameter()) {
                        DMNCompilerHelper.checkVariableName(model, p, p.getName());
                        DMNType dmnType = compiler.resolveTypeRef(model, node, p, p, p.getTypeRef());
                        func.addParameter(p.getName(), dmnType);
                        invoker.addParameter(p.getName(), dmnType, (em, dr) -> new EvaluatorResultImpl(dr.getContext().get(p.getName()), EvaluatorResult.ResultType.SUCCESS));
                    }
                    func.setEvaluator(invoker);
                    return func;
                } catch (Throwable e) {
                    MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, expression, model, e, null, Msg.FUNC_DEF_COMPILATION_ERR, functionName, node.getIdentifierString(), "Exception raised: " + e.getClass().getSimpleName());
                }
            } else {
                MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, expression, model, null, null, Msg.FUNC_DEF_MISSING_ENTRY, functionName, node.getIdentifierString());
            }
        } else {
            // error, java function definitions require a context
            MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, funcDef, model, null, null, Msg.FUNC_DEF_BODY_NOT_CONTEXT, node.getIdentifierString());
        }
    } else if (kind.equals(FunctionDefinition.Kind.PMML)) {
        MsgUtil.reportMessage(logger, DMNMessage.Severity.WARN, funcDef, model, null, null, Msg.FUNC_DEF_PMML_NOT_SUPPORTED, node.getIdentifierString());
    } else {
        MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, funcDef, model, null, null, Msg.FUNC_DEF_INVALID_KIND, kindStr, node.getIdentifierString());
    }
    return new DMNFunctionDefinitionEvaluator(node.getName(), funcDef);
}

Example 4 with DMNBaseNode

use of org.kie.dmn.core.ast.DMNBaseNode in project drools by kiegroup.

the class DMNRuntimeImpl method evaluateDecision.

private boolean evaluateDecision(DMNContext context, DMNResultImpl result, DecisionNode d, boolean typeCheck) {
    DecisionNodeImpl decision = (DecisionNodeImpl) d;
    if (result.getContext().isDefined(decision.getName())) {
        // already resolved
        return true;
    } else {
        // check if the decision was already evaluated before and returned error
        DMNDecisionResult.DecisionEvaluationStatus status = result.getDecisionResultById(decision.getId()).getEvaluationStatus();
        if (FAILED == status || SKIPPED == status || EVALUATING == status) {
            return false;
        }
    }
    try {
        DMNRuntimeEventManagerUtils.fireBeforeEvaluateDecision(eventManager, decision, result);
        boolean missingInput = false;
        DMNDecisionResultImpl dr = (DMNDecisionResultImpl) result.getDecisionResultById(decision.getId());
        dr.setEvaluationStatus(DMNDecisionResult.DecisionEvaluationStatus.EVALUATING);
        for (DMNNode dep : decision.getDependencies().values()) {
            try {
                if (typeCheck && !checkDependencyValueIsValid(dep, result)) {
                    missingInput = true;
                    DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, ((DMNBaseNode) dep).getSource(), result, null, null, Msg.ERROR_EVAL_NODE_DEP_WRONG_TYPE, getIdentifier(decision), getIdentifier(dep), MsgUtil.clipString(result.getContext().get(dep.getName()).toString(), 50), ((DMNBaseNode) dep).getType());
                    reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.SKIPPED);
                }
            } catch (Exception e) {
                MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, ((DMNBaseNode) dep).getSource(), result, e, null, Msg.ERROR_CHECKING_ALLOWED_VALUES, getIdentifier(dep), e.getMessage());
            }
            if (!result.getContext().isDefined(dep.getName())) {
                if (dep instanceof DecisionNode) {
                    if (!evaluateDecision(context, result, (DecisionNode) dep, typeCheck)) {
                        missingInput = true;
                        DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, decision.getSource(), result, null, null, Msg.UNABLE_TO_EVALUATE_DECISION_REQ_DEP, getIdentifier(decision), getIdentifier(dep));
                        reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.SKIPPED);
                    }
                } else if (dep instanceof BusinessKnowledgeModelNode) {
                    evaluateBKM(context, result, (BusinessKnowledgeModelNode) dep, typeCheck);
                } else {
                    missingInput = true;
                    DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, decision.getSource(), result, null, null, Msg.REQ_DEP_NOT_FOUND_FOR_NODE, getIdentifier(dep), getIdentifier(decision));
                    reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.SKIPPED);
                }
            }
        }
        if (missingInput) {
            return false;
        }
        if (decision.getEvaluator() == null) {
            DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.WARN, decision.getSource(), result, null, null, Msg.MISSING_EXPRESSION_FOR_DECISION, getIdentifier(decision));
            reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.SKIPPED);
            return false;
        }
        try {
            EvaluatorResult er = decision.getEvaluator().evaluate(this, result);
            if (er.getResultType() == EvaluatorResult.ResultType.SUCCESS) {
                Object value = er.getResult();
                if (!decision.getResultType().isCollection() && value instanceof Collection && ((Collection) value).size() == 1) {
                    // spec defines that "a=[a]", i.e., singleton collections should be treated as the single element
                    // and vice-versa
                    value = ((Collection) value).toArray()[0];
                }
                try {
                    if (typeCheck && !d.getResultType().isAssignableValue(value)) {
                        DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, decision.getSource(), result, null, null, Msg.ERROR_EVAL_NODE_RESULT_WRONG_TYPE, getIdentifier(decision), decision.getResultType(), value);
                        reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.FAILED);
                        return false;
                    }
                } catch (Exception e) {
                    MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, decision.getSource(), result, e, null, Msg.ERROR_CHECKING_ALLOWED_VALUES, getIdentifier(decision), e.getMessage());
                    return false;
                }
                result.getContext().set(decision.getDecision().getVariable().getName(), value);
                dr.setResult(value);
                dr.setEvaluationStatus(DMNDecisionResult.DecisionEvaluationStatus.SUCCEEDED);
            } else {
                dr.setEvaluationStatus(DMNDecisionResult.DecisionEvaluationStatus.FAILED);
                return false;
            }
        } catch (Throwable t) {
            DMNMessage message = MsgUtil.reportMessage(logger, DMNMessage.Severity.ERROR, decision.getSource(), result, t, null, Msg.ERROR_EVAL_DECISION_NODE, getIdentifier(decision), t.getMessage());
            reportFailure(dr, message, DMNDecisionResult.DecisionEvaluationStatus.FAILED);
        }
        return true;
    } finally {
        DMNRuntimeEventManagerUtils.fireAfterEvaluateDecision(eventManager, decision, result);
    }
}