Examples with NameExpr org.drools.javaparser.ast.expr.NameExpr used on opensource projects

Example 21 with NameExpr

use of org.drools.javaparser.ast.expr.NameExpr in project drools by kiegroup.

the class ExpressionTyper method nameExpr.

private Optional<TypedExpressionCursor> nameExpr(Expression drlxExpr, NameExpr firstNode, boolean isInLineCast, Class<?> originalTypeCursor) {
    Optional<TypedExpressionCursor> teCursor;
    String firstName = firstNode.getName().getIdentifier();
    Optional<DeclarationSpec> declarationById = ruleContext.getDeclarationById(firstName);
    if (declarationById.isPresent()) {
        // do NOT append any reactOnProperties.
        // because reactOnProperties is referring only to the properties of the type of the pattern, not other declarations properites.
        context.addUsedDeclarations(firstName);
        final Class<?> typeCursor;
        if (!isInLineCast) {
            typeCursor = declarationById.get().getDeclarationClass();
        } else {
            typeCursor = originalTypeCursor;
        }
        teCursor = of(new TypedExpressionCursor(new NameExpr(firstName), typeCursor));
    } else if (packageModel.getGlobals().containsKey(firstName)) {
        context.addUsedDeclarations(firstName);
        return of(new TypedExpressionCursor(new NameExpr(firstName), packageModel.getGlobals().get(firstName)));
    } else {
        final Class<?> typeCursor;
        // In OOPath a declaration is based on a position rather than a name.
        // Only an OOPath chunk can have a backreference expression
        Optional<DeclarationSpec> backReference = Optional.empty();
        if (firstNode.getBackReferencesCount() > 0) {
            List<DeclarationSpec> ooPathDeclarations = ruleContext.getOOPathDeclarations();
            DeclarationSpec backReferenceDeclaration = ooPathDeclarations.get(ooPathDeclarations.size() - 1 - firstNode.getBackReferencesCount());
            typeCursor = backReferenceDeclaration.getDeclarationClass();
            backReference = of(backReferenceDeclaration);
            context.addUsedDeclarations(backReferenceDeclaration.getBindingId());
        } else {
            typeCursor = originalTypeCursor;
        }
        Method firstAccessor = ClassUtils.getAccessor((!isInLineCast) ? typeCursor : patternType, firstName);
        if (firstAccessor != null) {
            // Hack to review - if a property is upper case it's probably not a react on property
            if (!"".equals(firstName) && Character.isLowerCase(firstName.charAt(0))) {
                context.addReactOnProperties(firstName);
            }
            final Class<?> typeOfFirstAccessor;
            if (!isInLineCast) {
                typeOfFirstAccessor = firstAccessor.getReturnType();
            } else {
                typeOfFirstAccessor = typeCursor;
            }
            NameExpr thisAccessor = new NameExpr("_this");
            final NameExpr scope = backReference.map(d -> new NameExpr(d.getBindingId())).orElse(thisAccessor);
            teCursor = of(new TypedExpressionCursor(new MethodCallExpr(scope, firstAccessor.getName()), typeOfFirstAccessor));
        } else {
            try {
                Class<?> resolvedType = ruleContext.getTypeResolver().resolveType(firstName);
                return of(new TypedExpressionCursor(null, resolvedType));
            } catch (ClassNotFoundException e) {
            // ignore
            }
            final Optional<Node> rootNode = findRootNodeViaParent(drlxExpr);
            rootNode.ifPresent(n -> {
                // In the error messages HalfBinary are transformed to Binary
                Node withHalfBinaryReplaced = replaceAllHalfBinaryChildren(n);
                ruleContext.addCompilationError(new ParseExpressionErrorResult((Expression) withHalfBinaryReplaced));
            });
            teCursor = Optional.empty();
        }
    }
    return teCursor;
}

Example 22 with NameExpr

use of org.drools.javaparser.ast.expr.NameExpr in project drools by kiegroup.

the class AccumulateVisitor method visit.

protected Optional<AccumulateVisitorPatternDSL.NewBinding> visit(RuleContext context, AccumulateDescr.AccumulateFunctionCallDescr function, MethodCallExpr accumulateDSL, PatternDescr basePattern, boolean inputPatternHasConstraints) {
    context.pushExprPointer(accumulateDSL::addArgument);
    final MethodCallExpr functionDSL = new MethodCallExpr(null, "accFunction");
    final String expression = function.getParams()[0];
    final Expression expr = DrlxParseUtil.parseExpression(expression).getExpr();
    final String bindingId = Optional.ofNullable(function.getBind()).orElse(basePattern.getIdentifier());
    Optional<AccumulateVisitorPatternDSL.NewBinding> newBinding = Optional.empty();
    if (expr instanceof BinaryExpr) {
        final DrlxParseResult parseResult = new ConstraintParser(context, packageModel).drlxParse(Object.class, bindingId, expression);
        newBinding = parseResult.acceptWithReturnValue(new ParseResultVisitor<Optional<AccumulateVisitorPatternDSL.NewBinding>>() {

            @Override
            public Optional<AccumulateVisitorPatternDSL.NewBinding> onSuccess(DrlxParseSuccess drlxParseResult) {
                final AccumulateFunction accumulateFunction = AccumulateVisitor.this.getAccumulateFunction(function, drlxParseResult.getExprType());
                final String bindExpressionVariable = context.getExprId(accumulateFunction.getResultType(), drlxParseResult.getLeft().toString());
                drlxParseResult.setExprBinding(bindExpressionVariable);
                context.addDeclarationReplacing(new DeclarationSpec(drlxParseResult.getPatternBinding(), drlxParseResult.getExprType()));
                functionDSL.addArgument(new ClassExpr(toType(accumulateFunction.getClass())));
                final MethodCallExpr newBindingFromBinary = AccumulateVisitor.this.buildBinding(bindExpressionVariable, drlxParseResult.getUsedDeclarations(), drlxParseResult.getExpr());
                context.addDeclarationReplacing(new DeclarationSpec(bindExpressionVariable, drlxParseResult.getExprType()));
                functionDSL.addArgument(new NameExpr(toVar(bindExpressionVariable)));
                return Optional.of(new AccumulateVisitorPatternDSL.NewBinding(Optional.empty(), newBindingFromBinary));
            }

            @Override
            public Optional<AccumulateVisitorPatternDSL.NewBinding> onFail(DrlxParseFail failure) {
                return Optional.empty();
            }
        });
    } else if (expr instanceof MethodCallExpr) {
        final DrlxParseUtil.RemoveRootNodeResult methodCallWithoutRootNode = DrlxParseUtil.removeRootNode(expr);
        final String rootNodeName = getRootNodeName(methodCallWithoutRootNode);
        final TypedExpression typedExpression = parseMethodCallType(context, rootNodeName, methodCallWithoutRootNode.getWithoutRootNode());
        final Class<?> methodCallExprType = typedExpression.getType();
        final AccumulateFunction accumulateFunction = getAccumulateFunction(function, methodCallExprType);
        final Class accumulateFunctionResultType = accumulateFunction.getResultType();
        functionDSL.addArgument(new ClassExpr(toType(accumulateFunction.getClass())));
        // Every expression in an accumulate function gets transformed in a bind expression with a generated id
        // Then the accumulate function will have that binding expression as a source
        final String bindExpressionVariable = context.getExprId(accumulateFunctionResultType, typedExpression.toString());
        Expression withThis = DrlxParseUtil.prepend(DrlxParseUtil._THIS_EXPR, typedExpression.getExpression());
        DrlxParseSuccess result = new DrlxParseSuccess(accumulateFunctionResultType, "", rootNodeName, withThis, accumulateFunctionResultType).setLeft(typedExpression).setExprBinding(bindExpressionVariable);
        final MethodCallExpr binding = expressionBuilder.buildBinding(result);
        newBinding = Optional.of(new AccumulateVisitorPatternDSL.NewBinding(Optional.of(result.getPatternBinding()), binding));
        context.addDeclarationReplacing(new DeclarationSpec(bindExpressionVariable, methodCallExprType));
        functionDSL.addArgument(new NameExpr(toVar(bindExpressionVariable)));
        context.addDeclarationReplacing(new DeclarationSpec(bindingId, accumulateFunctionResultType));
    } else if (expr instanceof NameExpr) {
        final Class<?> declarationClass = context.getDeclarationById(expr.toString()).orElseThrow(RuntimeException::new).getDeclarationClass();
        final String nameExpr = ((NameExpr) expr).getName().asString();
        final AccumulateFunction accumulateFunction = getAccumulateFunction(function, declarationClass);
        functionDSL.addArgument(new ClassExpr(toType(accumulateFunction.getClass())));
        functionDSL.addArgument(new NameExpr(toVar(nameExpr)));
        Class accumulateFunctionResultType = accumulateFunction.getResultType();
        if (accumulateFunctionResultType == Comparable.class && (Comparable.class.isAssignableFrom(declarationClass) || declarationClass.isPrimitive())) {
            accumulateFunctionResultType = declarationClass;
        }
        context.addDeclarationReplacing(new DeclarationSpec(bindingId, accumulateFunctionResultType));
    } else {
        throw new UnsupportedOperationException("Unsupported expression " + expr);
    }
    final MethodCallExpr asDSL = new MethodCallExpr(functionDSL, "as");
    asDSL.addArgument(new NameExpr(toVar(bindingId)));
    accumulateDSL.addArgument(asDSL);
    context.popExprPointer();
    return newBinding;
}

Example 23 with NameExpr

use of org.drools.javaparser.ast.expr.NameExpr in project drools by kiegroup.

the class AccumulateVisitorFlowDSL method buildBinding.

@Override
protected MethodCallExpr buildBinding(String bindingName, Collection<String> usedDeclaration, Expression expression) {
    MethodCallExpr bindDSL = new MethodCallExpr(null, BIND_CALL);
    bindDSL.addArgument(toVar(bindingName));
    MethodCallExpr bindAsDSL = new MethodCallExpr(bindDSL, BIND_AS_CALL);
    usedDeclaration.stream().map(d -> new NameExpr(toVar(d))).forEach(bindAsDSL::addArgument);
    bindAsDSL.addArgument(buildConstraintExpression(expression, usedDeclaration));
    return bindAsDSL;
}

Example 24 with NameExpr

use of org.drools.javaparser.ast.expr.NameExpr in project drools by kiegroup.

the class FlowDSLPattern method createInputExpression.

private MethodCallExpr createInputExpression(PatternDescr pattern) {
    MethodCallExpr exprDSL = new MethodCallExpr(null, INPUT_CALL);
    exprDSL.addArgument(new NameExpr(toVar(pattern.getIdentifier())));
    Set<String> watchedProperties = new HashSet<>();
    watchedProperties.addAll(context.getRuleDescr().lookAheadFieldsOfIdentifier(pattern));
    watchedProperties.addAll(getPatternListenedProperties(pattern));
    if (!watchedProperties.isEmpty()) {
        exprDSL = new MethodCallExpr(exprDSL, "watch");
        watchedProperties.stream().map(StringLiteralExpr::new).forEach(exprDSL::addArgument);
    }
    return exprDSL;
}