Examples with Expression com.github.javaparser.ast.expr.Expression used on opensource projects

Example 96 with Expression

use of com.github.javaparser.ast.expr.Expression in project drools by kiegroup.

the class ConstraintParser method parseFunctionInEval.

private DrlxParseResult parseFunctionInEval(MethodCallExpr methodCallExpr, Class<?> patternType, String bindingId, boolean isPositional, Optional<MethodDeclaration> functionCall) {
    // when the methodCallExpr will be placed in the model/DSL, any parameter being a "this" need to be implemented as _this by convention.
    List<ThisExpr> rewriteThisExprs = recurseCollectArguments(methodCallExpr).stream().filter(ThisExpr.class::isInstance).map(ThisExpr.class::cast).collect(Collectors.toList());
    for (ThisExpr t : rewriteThisExprs) {
        methodCallExpr.replace(t, new NameExpr(THIS_PLACEHOLDER));
    }
    if (functionCall.isPresent()) {
        Class<?> returnType = DrlxParseUtil.getClassFromContext(context.getTypeResolver(), functionCall.get().getType().asString());
        NodeList<Expression> arguments = methodCallExpr.getArguments();
        List<String> usedDeclarations = new ArrayList<>();
        for (Expression arg : arguments) {
            String argString = printNode(arg);
            if (arg instanceof DrlNameExpr && !argString.equals(THIS_PLACEHOLDER)) {
                usedDeclarations.add(argString);
            } else if (arg instanceof CastExpr) {
                String s = printNode(((CastExpr) arg).getExpression());
                usedDeclarations.add(s);
            } else if (arg instanceof MethodCallExpr) {
                TypedExpressionResult typedExpressionResult = new ExpressionTyper(context, null, bindingId, isPositional).toTypedExpression(arg);
                usedDeclarations.addAll(typedExpressionResult.getUsedDeclarations());
            }
        }
        return new SingleDrlxParseSuccess(patternType, bindingId, methodCallExpr, returnType).setUsedDeclarations(usedDeclarations).setIsPredicate(isBooleanBoxedUnboxed(returnType));
    } else {
        throw new IllegalArgumentException("Specified function call is not present!");
    }
}

Example 97 with Expression

use of com.github.javaparser.ast.expr.Expression in project drools by kiegroup.

the class ConstraintParser method combineExpressions.

private Expression combineExpressions(List<Expression> leftPrefixExpresssions, List<Expression> rightPrefixExpresssions, Expression combo) {
    Expression inner = combo;
    if (combo.isEnclosedExpr()) {
        EnclosedExpr enclosedExpr = combo.asEnclosedExpr();
        inner = stripEnclosedExpr(enclosedExpr);
    }
    BinaryExpr binaryExpr;
    if (inner.isBinaryExpr()) {
        binaryExpr = inner.asBinaryExpr();
    } else {
        throw new RuntimeException(combo + " is not nor contains BinaryExpr");
    }
    Expression left = binaryExpr.getLeft();
    for (Expression prefixExpression : leftPrefixExpresssions) {
        left = new BinaryExpr(prefixExpression, left, BinaryExpr.Operator.AND);
    }
    binaryExpr.setLeft(left);
    Expression right = binaryExpr.getRight();
    for (Expression prefixExpression : rightPrefixExpresssions) {
        right = new BinaryExpr(prefixExpression, right, BinaryExpr.Operator.AND);
    }
    binaryExpr.setRight(right);
    return combo;
}

Example 98 with Expression

use of com.github.javaparser.ast.expr.Expression in project drools by kiegroup.

the class ConstraintParser method getEqualityExpression.

private SpecialComparisonResult getEqualityExpression(TypedExpression left, TypedExpression right, BinaryExpr.Operator operator) {
    if ((isAnyOperandBigDecimal(left, right) || isAnyOperandBigInteger(left, right)) && !isAnyOperandNullLiteral(left, right)) {
        return compareBigDecimal(operator, left, right);
    }
    boolean isLeftNumber = isNumber(left);
    boolean isRightNumber = isNumber(right);
    String equalsMethod = isLeftNumber && isRightNumber ? "org.drools.modelcompiler.util.EvaluationUtil.areNumbersNullSafeEquals" : "org.drools.modelcompiler.util.EvaluationUtil.areNullSafeEquals";
    Expression leftExpr = left.uncastExpression();
    Expression rightExpr = right.uncastExpression();
    if (isLeftNumber) {
        if (isString(right)) {
            leftExpr = new BinaryExpr(new StringLiteralExpr(""), leftExpr, PLUS);
        }
    } else if (isRightNumber && isString(left)) {
        rightExpr = new BinaryExpr(new StringLiteralExpr(""), rightExpr, PLUS);
    }
    MethodCallExpr methodCallExpr = new MethodCallExpr(null, equalsMethod);
    // Avoid casts, by using an helper method we leverage autoboxing and equals
    methodCallExpr.addArgument(leftExpr);
    methodCallExpr.addArgument(rightExpr);
    Expression expression = operator == BinaryExpr.Operator.EQUALS ? methodCallExpr : new UnaryExpr(methodCallExpr, UnaryExpr.Operator.LOGICAL_COMPLEMENT);
    return new SpecialComparisonResult(expression, left, right);
}

Example 99 with Expression

use of com.github.javaparser.ast.expr.Expression in project drools by kiegroup.

the class ConstraintParser method compileToJavaRecursive.

private DrlxParseResult compileToJavaRecursive(Class<?> patternType, String bindingId, ConstraintExpression constraint, Expression drlxExpr, boolean hasBind, boolean isPositional) {
    boolean isEnclosed = false;
    SimpleName bind = null;
    if (drlxExpr instanceof FullyQualifiedInlineCastExpr) {
        drlxExpr = transformFullyQualifiedInlineCastExpr(context.getTypeResolver(), (FullyQualifiedInlineCastExpr) drlxExpr);
    }
    while (drlxExpr instanceof EnclosedExpr) {
        drlxExpr = ((EnclosedExpr) drlxExpr).getInner();
        isEnclosed = true;
    }
    if (drlxExpr instanceof DrlxExpression) {
        bind = ((DrlxExpression) drlxExpr).getBind();
        drlxExpr = ((DrlxExpression) drlxExpr).getExpr();
    }
    if (drlxExpr instanceof MethodCallExpr && !((MethodCallExpr) drlxExpr).getScope().isPresent() && ((MethodCallExpr) drlxExpr).getNameAsString().equals("eval")) {
        drlxExpr = ((MethodCallExpr) drlxExpr).getArgument(0);
    }
    if (drlxExpr instanceof BinaryExpr) {
        DrlxParseResult result = parseBinaryExpr((BinaryExpr) drlxExpr, patternType, bindingId, constraint, drlxExpr, hasBind, isPositional, isEnclosed);
        if (result instanceof SingleDrlxParseSuccess && bind != null) {
            ((SingleDrlxParseSuccess) result).setExprBinding(bind.asString());
        }
        return result;
    }
    if (drlxExpr instanceof UnaryExpr) {
        return parseUnaryExpr((UnaryExpr) drlxExpr, patternType, bindingId, constraint, drlxExpr, hasBind, isPositional);
    }
    if (drlxExpr instanceof PointFreeExpr) {
        return parsePointFreeExpr((PointFreeExpr) drlxExpr, patternType, bindingId, isPositional);
    }
    if (patternType == null && drlxExpr instanceof MethodCallExpr) {
        MethodCallExpr methodCallExpr = (MethodCallExpr) drlxExpr;
        Optional<MethodDeclaration> functionCall = packageModel.getFunctions().stream().filter(m -> m.getName().equals(methodCallExpr.getName())).findFirst();
        if (functionCall.isPresent()) {
            return parseFunctionInEval(methodCallExpr, patternType, bindingId, isPositional, functionCall);
        }
    }
    if (drlxExpr instanceof FieldAccessExpr) {
        return parseFieldAccessExpr((FieldAccessExpr) drlxExpr, patternType, bindingId);
    }
    String expression = constraint.getExpression();
    if (drlxExpr instanceof DrlNameExpr) {
        return parseNameExpr((DrlNameExpr) drlxExpr, patternType, bindingId, drlxExpr, hasBind, expression);
    }
    if (drlxExpr instanceof OOPathExpr) {
        return parseOOPathExpr((OOPathExpr) drlxExpr, patternType, bindingId, drlxExpr, hasBind, expression);
    }
    if (drlxExpr instanceof LiteralExpr) {
        Class<?> literalExpressionType = getLiteralExpressionType(((LiteralExpr) drlxExpr));
        return new SingleDrlxParseSuccess(patternType, bindingId, drlxExpr, literalExpressionType).setIsPredicate(isBooleanBoxedUnboxed(literalExpressionType));
    }
    if (patternType != null) {
        ExpressionTyperContext expressionTyperContext = new ExpressionTyperContext();
        ExpressionTyper expressionTyper = new ExpressionTyper(context, patternType, bindingId, isPositional, expressionTyperContext);
        TypedExpressionResult leftTypedExpressionResult = expressionTyper.toTypedExpression(drlxExpr);
        Optional<TypedExpression> optLeft = leftTypedExpressionResult.getTypedExpression();
        if (!optLeft.isPresent()) {
            return new DrlxParseFail();
        }
        TypedExpression left = optLeft.get();
        Expression combo = left.getExpression();
        Type exprType = left.getType();
        boolean isPredicate = isBooleanBoxedUnboxed(exprType);
        if (isPredicate) {
            combo = combineExpressions(leftTypedExpressionResult, combo);
        }
        return new SingleDrlxParseSuccess(patternType, bindingId, combo, exprType).setReactOnProperties(expressionTyperContext.getReactOnProperties()).setUsedDeclarations(expressionTyperContext.getUsedDeclarations()).setImplicitCastExpression(expressionTyperContext.getInlineCastExpression()).setNullSafeExpressions(expressionTyperContext.getNullSafeExpressions()).setIsPredicate(isPredicate);
    } else {
        final ExpressionTyperContext expressionTyperContext = new ExpressionTyperContext();
        final ExpressionTyper expressionTyper = new ExpressionTyper(context, null, bindingId, isPositional, expressionTyperContext);
        TypedExpressionResult leftTypedExpressionResult = expressionTyper.toTypedExpression(drlxExpr);
        Optional<TypedExpression> optLeft = leftTypedExpressionResult.getTypedExpression();
        if (!optLeft.isPresent()) {
            return new DrlxParseFail();
        }
        TypedExpression left = optLeft.get();
        return new SingleDrlxParseSuccess(null, bindingId, drlxExpr, left.getType()).setUsedDeclarations(expressionTyperContext.getUsedDeclarations()).setIsPredicate(true);
    }
}

Example 100 with Expression

use of com.github.javaparser.ast.expr.Expression in project drools by kiegroup.

the class Consequence method findModifiedPropertiesFromAssignment.

private Set<String> findModifiedPropertiesFromAssignment(List<AssignExpr> assignExprs, MethodCallExpr updateExpr, String updatedVar, Class<?> updatedClass) {
    Set<String> modifiedProps = new HashSet<>();
    for (AssignExpr assignExpr : assignExprs) {
        Expression target = assignExpr.getTarget();
        if (target instanceof FieldAccessExpr) {
            FieldAccessExpr fieldAccessExpr = (FieldAccessExpr) target;
            Expression scope = fieldAccessExpr.getScope();
            if (scope instanceof NameExpr && ((NameExpr) scope).getNameAsString().equals(updatedVar)) {
                modifiedProps.add(fieldAccessExpr.getNameAsString());
            }
        }
    }
    return modifiedProps;
}