use of org.kie.dmn.feel.FEEL 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;
}
use of org.kie.dmn.feel.FEEL in project drools by kiegroup.
the class FEELErrorMessagesTest method unknownVariable.
@Test
public void unknownVariable() {
FEEL feel = FEEL.newInstance();
FEELEventListener fel = Mockito.mock(FEELEventListener.class);
feel.addListener(fel);
CompilerContext ctx = feel.newCompilerContext();
// ctx.addInputVariableType( "a variable name", BuiltInType.STRING );
feel.compile("a variable name", ctx);
ArgumentCaptor<FEELEvent> captor = ArgumentCaptor.forClass(FEELEvent.class);
verify(fel, times(2)).onEvent(captor.capture());
Assert.assertThat(captor.getAllValues().size(), is(2));
Assert.assertThat(captor.getAllValues().get(1), is(instanceOf(UnknownVariableErrorEvent.class)));
Assert.assertThat(((UnknownVariableErrorEvent) captor.getAllValues().get(1)).getOffendingSymbol(), is("a variable name"));
}
use of org.kie.dmn.feel.FEEL 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);
}
use of org.kie.dmn.feel.FEEL in project drools by kiegroup.
the class DMNFEELHelper method createFEELInstance.
private FEEL createFEELInstance() {
FEEL feel = FEEL.newInstance(feelProfiles);
feel.addListener(listener);
return feel;
}
use of org.kie.dmn.feel.FEEL in project drools by kiegroup.
the class DecisionTableFunction method invoke.
/**
* @param inputExpressionList a list of the N>=0 input expressions in display order
* @param inputValuesList * a list of N input values, corresponding to the input expressions. Each
* list element is a unary tests literal (see below).
* @param outputs * a name (a string matching grammar rule 27) or a list of M>0 names
* @param outputValues * if outputs is a list, then output values is a list of lists of values, one list
* per output; else output values is a list of values for the one output.
* Each value is a string.
* @param ruleList a list of R>0 rules. A rule is a list of N input entries followed by M
* output entries. An input entry is a unary tests literal. An output entry is
* an expression represented as a string.
* @param hitPolicy * one of: "U", "A", “P”, “F”, "R", "O", "C", "C+", "C#", "C<", “C>”
* (default is "U")
* @param defaultOutputValue * if outputs is a list, then default output value is a context with entries
* composed of outputs and output values; else default output value is one
* of the output values.
*/
public Object invoke(@ParameterName("ctx") EvaluationContext ctx, @ParameterName("outputs") Object outputs, @ParameterName("input expression list") Object inputExpressionList, @ParameterName("input values list") List<?> inputValuesList, @ParameterName("output values") Object outputValues, @ParameterName("rule list") List<List> ruleList, @ParameterName("hit policy") String hitPolicy, @ParameterName("default output value") Object defaultOutputValue) {
// input expression list can have a single element or be a list
// TODO isn't ^ conflicting with the specs page 136 "input expression list: a LIST of the"
List<String> inputExpressions = inputExpressionList instanceof List ? (List) inputExpressionList : Collections.singletonList((String) inputExpressionList);
List<DTInputClause> inputs;
if (inputValuesList != null) {
List<UnaryTest> inputValues = inputValuesList.stream().map(o -> toUnaryTest(ctx, o)).collect(Collectors.toList());
if (inputValues.size() != inputExpressions.size()) {
// TODO handle compilation error
}
// zip inputExpression with its inputValue
inputs = IntStream.range(0, inputExpressions.size()).mapToObj(i -> new DTInputClause(inputExpressions.get(i), inputValuesList.toString(), Collections.singletonList(inputValues.get(i)), null)).collect(Collectors.toList());
} else {
inputs = inputExpressions.stream().map(ie -> new DTInputClause(ie, null, null, null)).collect(Collectors.toList());
}
List<String> parseOutputs = outputs instanceof List ? (List) outputs : Collections.singletonList((String) outputs);
List<DTOutputClause> outputClauses;
if (outputValues != null) {
if (parseOutputs.size() == 1) {
outputClauses = new ArrayList<>();
List<UnaryTest> outputValuesCompiled = objectToUnaryTestList(ctx, Collections.singletonList((List<Object>) outputValues)).get(0);
outputClauses.add(new DTOutputClause(parseOutputs.get(0), outputValuesCompiled));
} else {
List<List<UnaryTest>> listOfList = objectToUnaryTestList(ctx, (List<List<Object>>) outputValues);
// zip inputExpression with its inputValue
outputClauses = IntStream.range(0, parseOutputs.size()).mapToObj(i -> new DTOutputClause(parseOutputs.get(i), listOfList.get(i))).collect(Collectors.toList());
}
} else {
outputClauses = parseOutputs.stream().map(out -> new DTOutputClause(out, null)).collect(Collectors.toList());
}
// TODO parse default output value.
FEEL feel = FEEL.newInstance();
List<DTDecisionRule> decisionRules = IntStream.range(0, ruleList.size()).mapToObj(index -> toDecisionRule(ctx, feel, index, ruleList.get(index), inputExpressions.size())).collect(Collectors.toList());
// TODO is there a way to avoid UUID and get from _evaluation_ ctx the name of the wrapping context?
// TODO also in this case it is using an ad-hoc created FEEL instance instead of the "hosted" one.
DecisionTableImpl dti = new DecisionTableImpl(UUID.randomUUID().toString(), inputExpressions, inputs, outputClauses, decisionRules, HitPolicy.fromString(hitPolicy), FEEL.newInstance());
return new DTInvokerFunction(dti);
}
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