Examples with DrlxExpression org.drools.mvel.parser.ast.expr.DrlxExpression used on opensource projects

Example 1 with DrlxExpression

use of org.drools.mvel.parser.ast.expr.DrlxExpression in project drools by kiegroup.

the class FromVisitor method fromFieldOrName.

private Optional<Expression> fromFieldOrName(String expression) {
    Optional<String> optContainsBinding = DrlxParseUtil.findBindingIdFromDotExpression(expression);
    final String bindingId = optContainsBinding.orElse(expression);
    final DrlxExpression drlxExpression = DrlxParseUtil.parseExpression(expression);
    final Expression parsedExpression = drlxExpression.getExpr();
    Optional<TypedExpression> staticField = parsedExpression instanceof FieldAccessExpr ? ExpressionTyper.tryParseAsConstantField(context.getTypeResolver(), ((FieldAccessExpr) parsedExpression).getScope(), ((FieldAccessExpr) parsedExpression).getNameAsString()) : Optional.empty();
    if (staticField.isPresent()) {
        return of(createSupplier(parsedExpression));
    }
    if (packageModel.hasEntryPoint(bindingId)) {
        return of(createEntryPointCall(bindingId));
    }
    if (contextHasDeclaration(bindingId)) {
        return of(createFromCall(expression, bindingId, optContainsBinding.isPresent(), null));
    }
    return of(createUnitDataCall(bindingId));
}

Example 2 with DrlxExpression

use of org.drools.mvel.parser.ast.expr.DrlxExpression in project drools by kiegroup.

the class ExpressionTyperTest method transformMethodExpressionToMethodCallWithInlineCast.

@Test
public void transformMethodExpressionToMethodCallWithInlineCast() {
    typeResolver.addImport("org.drools.modelcompiler.domain.InternationalAddress");
    final DrlxExpression expr = DrlxParseUtil.parseExpression("address#InternationalAddress.state");
    final MethodCallExpr expected = StaticJavaParser.parseExpression("((org.drools.modelcompiler.domain.InternationalAddress)_this.getAddress()).getState()");
    assertEquals(PrintUtil.printNode(expected), toTypedExpression(PrintUtil.printNode(expr.getExpr()), Person.class).getExpression().toString());
}

Example 3 with DrlxExpression

use of org.drools.mvel.parser.ast.expr.DrlxExpression in project drools by kiegroup.

the class ConstraintParser method drlxParse.

public DrlxParseResult drlxParse(Class<?> patternType, String bindingId, ConstraintExpression constraint, boolean isPositional) {
    String constraintExpressionString = constraint.getExpression();
    DrlxExpression drlx = DrlxParseUtil.parseExpression(constraintExpressionString);
    boolean hasBind = drlx.getBind() != null;
    DrlxParseResult drlxParseResult = compileStart(patternType, bindingId, constraint, drlx.getExpr(), hasBind, isPositional).setOriginalDrlConstraint(constraintExpressionString);
    drlxParseResult.accept(result -> {
        if (hasBind) {
            SingleDrlxParseSuccess singleResult = (SingleDrlxParseSuccess) result;
            String bindId = drlx.getBind().asString();
            addDeclaration(drlx, singleResult, bindId);
        } else if (result instanceof SingleDrlxParseSuccess) {
            SingleDrlxParseSuccess singleResult = (SingleDrlxParseSuccess) result;
            // a constraint has a binding inside its expression (not in top level DrlxExpression)
            String bindId = singleResult.getExprBinding();
            if (bindId != null) {
                addDeclaration(drlx, singleResult, bindId);
            }
        }
    });
    return drlxParseResult;
}

Example 4 with DrlxExpression

use of org.drools.mvel.parser.ast.expr.DrlxExpression 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 5 with DrlxExpression

use of org.drools.mvel.parser.ast.expr.DrlxExpression in project drools by kiegroup.

the class DroolsMvelParserTest method testOOPathExprWithBackReference.

@Test
public void testOOPathExprWithBackReference() {
    String expr = "$toy : /wife/children/toys[name.length == ../../name.length]";
    DrlxExpression drlx = parseExpression(parser, expr);
    assertEquals("$toy", drlx.getBind().asString());
    Expression expression = drlx.getExpr();
    assertTrue(expression instanceof OOPathExpr);
    final OOPathChunk secondChunk = ((OOPathExpr) expression).getChunks().get(2);
    final BinaryExpr secondChunkFirstCondition = (BinaryExpr) secondChunk.getConditions().get(0).getExpr();
    final DrlNameExpr rightName = (DrlNameExpr) ((FieldAccessExpr) secondChunkFirstCondition.getRight()).getScope();
    assertEquals(2, rightName.getBackReferencesCount());
    assertEquals(expr, printNode(drlx));
}