Examples with UnaryTest org.kie.dmn.feel.runtime.UnaryTest used on opensource projects

Example 6 with UnaryTest

use of org.kie.dmn.feel.runtime.UnaryTest 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);
}

Example 7 with UnaryTest

use of org.kie.dmn.feel.runtime.UnaryTest in project drools by kiegroup.

the class FEELImpl method evaluateUnaryTests.

@Override
public List<UnaryTest> evaluateUnaryTests(String expression, Map<String, Type> variableTypes) {
    // DMN defines a special case where, unless the expressions are unary tests
    // or ranges, they need to be converted into an equality test unary expression.
    // This way, we have to compile and check the low level AST nodes to properly
    // deal with this case
    CompilerContext ctx = newCompilerContext();
    for (Map.Entry<String, Type> e : variableTypes.entrySet()) {
        ctx.addInputVariableType(e.getKey(), e.getValue());
    }
    CompiledExpressionImpl compiledExpression = (CompiledExpressionImpl) compileExpressionList(expression, ctx);
    if (compiledExpression != null) {
        ListNode listNode = (ListNode) compiledExpression.getExpression();
        List<BaseNode> tests = new ArrayList<>();
        for (BaseNode o : listNode.getElements()) {
            if (o == null) {
                // not much we can do, so just skip it. Error was reported somewhere else
                continue;
            } else if (o instanceof UnaryTestNode || o instanceof DashNode) {
                tests.add(o);
            } else if (o instanceof RangeNode || o instanceof ListNode) {
                tests.add(new UnaryTestNode("in", o));
            } else {
                tests.add(new UnaryTestNode("=", o));
            }
        }
        listNode.setElements(tests);
        compiledExpression.setExpression(listNode);
        // now we can evaluate the expression to build the list of unary tests
        List<UnaryTest> uts = (List<UnaryTest>) evaluate(compiledExpression, FEELImpl.EMPTY_INPUT);
        return uts;
    }
    return Collections.emptyList();
}