Examples with JavaExpressionParseException org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException used on opensource projects

Example 6 with JavaExpressionParseException

use of org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException in project checker-framework by typetools.

the class LessThanAnnotatedTypeFactory method getMinValueFromString.

/**
 * Returns the minimum value of {@code expression} at {@code tree}.
 *
 * @param expression the expression whose minimum value to retrieve
 * @param tree where to determine the value
 * @param path the path to {@code tree}
 * @return the minimum value of {@code expression} at {@code tree}
 */
private long getMinValueFromString(String expression, Tree tree, TreePath path) {
    ValueAnnotatedTypeFactory valueAtypeFactory = getValueAnnotatedTypeFactory();
    JavaExpression expressionJe;
    try {
        expressionJe = valueAtypeFactory.parseJavaExpressionString(expression, path);
    } catch (JavaExpressionParseException e) {
        return Long.MIN_VALUE;
    }
    AnnotationMirror intRange = valueAtypeFactory.getAnnotationFromJavaExpression(expressionJe, tree, IntRange.class);
    if (intRange != null) {
        return valueAtypeFactory.getRange(intRange).from;
    }
    AnnotationMirror intValue = valueAtypeFactory.getAnnotationFromJavaExpression(expressionJe, tree, IntVal.class);
    if (intValue != null) {
        List<Long> possibleValues = valueAtypeFactory.getIntValues(intValue);
        return Collections.min(possibleValues);
    }
    if (expressionJe instanceof FieldAccess) {
        FieldAccess fieldAccess = ((FieldAccess) expressionJe);
        if (fieldAccess.getReceiver().getType().getKind() == TypeKind.ARRAY) {
            // array.length might not be in the store, so check for the length of the array.
            AnnotationMirror arrayRange = valueAtypeFactory.getAnnotationFromJavaExpression(fieldAccess.getReceiver(), tree, ArrayLenRange.class);
            if (arrayRange != null) {
                return valueAtypeFactory.getRange(arrayRange).from;
            }
            AnnotationMirror arrayLen = valueAtypeFactory.getAnnotationFromJavaExpression(expressionJe, tree, ArrayLen.class);
            if (arrayLen != null) {
                List<Integer> possibleValues = valueAtypeFactory.getArrayLength(arrayLen);
                return Collections.min(possibleValues);
            }
            // Even arrays that we know nothing about must have at least zero length.
            return 0;
        }
    }
    return Long.MIN_VALUE;
}

Example 7 with JavaExpressionParseException

use of org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException in project checker-framework by typetools.

the class CFAbstractTransfer method addInformationFromPreconditions.

/**
 * Add the information from all the preconditions of a method to the initial store in the method
 * body.
 *
 * @param initialStore the initial store for the method body
 * @param factory the type factory
 * @param methodAst the AST for a method declaration
 * @param methodDeclTree the declaration of the method; is a field of {@code methodAst}
 * @param methodElement the element for the method
 */
protected void addInformationFromPreconditions(S initialStore, AnnotatedTypeFactory factory, CFGMethod methodAst, MethodTree methodDeclTree, ExecutableElement methodElement) {
    ContractsFromMethod contractsUtils = analysis.atypeFactory.getContractsFromMethod();
    Set<Precondition> preconditions = contractsUtils.getPreconditions(methodElement);
    StringToJavaExpression stringToJavaExpr = stringExpr -> StringToJavaExpression.atMethodBody(stringExpr, methodDeclTree, analysis.checker);
    for (Precondition p : preconditions) {
        String stringExpr = p.expressionString;
        AnnotationMirror annotation = p.viewpointAdaptDependentTypeAnnotation(analysis.atypeFactory, stringToJavaExpr, /*errorTree=*/
        null);
        JavaExpression exprJe;
        try {
            // TODO: currently, these expressions are parsed at the declaration (i.e. here) and for
            // every use. this could be optimized to store the result the first time.
            // (same for other annotations)
            exprJe = StringToJavaExpression.atMethodBody(stringExpr, methodDeclTree, analysis.checker);
        } catch (JavaExpressionParseException e) {
            // Errors are reported by BaseTypeVisitor.checkContractsAtMethodDeclaration().
            continue;
        }
        initialStore.insertValuePermitNondeterministic(exprJe, annotation);
    }
}

Example 8 with JavaExpressionParseException

use of org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException in project checker-framework by typetools.

the class CFAbstractTransfer method processPostconditionsAndConditionalPostconditions.

/**
 * Add information from the postconditions and conditional postconditions of a method to the
 * stores after an invocation.
 *
 * @param invocationNode a method call
 * @param invocationTree the tree for the method call
 * @param thenStore the "then" store; is side-effected by this method
 * @param elseStore the "else" store; is side-effected by this method
 * @param postconditions the postconditions
 */
private void processPostconditionsAndConditionalPostconditions(MethodInvocationNode invocationNode, Tree invocationTree, S thenStore, S elseStore, Set<? extends Contract> postconditions) {
    StringToJavaExpression stringToJavaExpr = stringExpr -> StringToJavaExpression.atMethodInvocation(stringExpr, invocationNode, analysis.checker);
    for (Contract p : postconditions) {
        // Viewpoint-adapt to the method use (the call site).
        AnnotationMirror anno = p.viewpointAdaptDependentTypeAnnotation(analysis.atypeFactory, stringToJavaExpr, /*errorTree=*/
        null);
        String expressionString = p.expressionString;
        try {
            JavaExpression je = stringToJavaExpr.toJavaExpression(expressionString);
            // are removed from the store before this method is called.
            if (p.kind == Contract.Kind.CONDITIONALPOSTCONDITION) {
                if (((ConditionalPostcondition) p).resultValue) {
                    thenStore.insertOrRefinePermitNondeterministic(je, anno);
                } else {
                    elseStore.insertOrRefinePermitNondeterministic(je, anno);
                }
            } else {
                thenStore.insertOrRefinePermitNondeterministic(je, anno);
            }
        } catch (JavaExpressionParseException e) {
            // report errors here
            if (e.isFlowParseError()) {
                Object[] args = new Object[e.args.length + 1];
                args[0] = ElementUtils.getSimpleSignature(TreeUtils.elementFromUse(invocationNode.getTree()));
                System.arraycopy(e.args, 0, args, 1, e.args.length);
                analysis.checker.reportError(invocationTree, "flowexpr.parse.error.postcondition", args);
            } else {
                analysis.checker.report(invocationTree, e.getDiagMessage());
            }
        }
    }
}

Example 9 with JavaExpressionParseException

use of org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException in project checker-framework by typetools.

the class BaseTypeVisitor method checkPreconditions.

/**
 * Checks that all the given {@code preconditions} hold true immediately prior to the method
 * invocation or variable access at {@code tree}.
 *
 * @param tree the method invocation; immediately prior to it, the preconditions must hold true
 * @param preconditions the preconditions to be checked
 */
protected void checkPreconditions(MethodInvocationTree tree, Set<Precondition> preconditions) {
    // TODO: Remove this check and investigate the root cause.
    if (preconditions.isEmpty()) {
        return;
    }
    StringToJavaExpression stringToJavaExpr = stringExpr -> StringToJavaExpression.atMethodInvocation(stringExpr, tree, checker);
    for (Contract c : preconditions) {
        Precondition p = (Precondition) c;
        String expressionString = p.expressionString;
        AnnotationMirror anno = c.viewpointAdaptDependentTypeAnnotation(atypeFactory, stringToJavaExpr, tree);
        JavaExpression exprJe;
        try {
            exprJe = StringToJavaExpression.atMethodInvocation(expressionString, tree, checker);
        } catch (JavaExpressionParseException e) {
            // report errors here
            checker.report(tree, e.getDiagMessage());
            return;
        }
        CFAbstractStore<?, ?> store = atypeFactory.getStoreBefore(tree);
        CFAbstractValue<?> value = null;
        if (CFAbstractStore.canInsertJavaExpression(exprJe)) {
            value = store.getValue(exprJe);
        }
        AnnotationMirror inferredAnno = null;
        if (value != null) {
            QualifierHierarchy hierarchy = atypeFactory.getQualifierHierarchy();
            Set<AnnotationMirror> annos = value.getAnnotations();
            inferredAnno = hierarchy.findAnnotationInSameHierarchy(annos, anno);
        }
        if (!checkContract(exprJe, anno, inferredAnno, store)) {
            if (exprJe != null) {
                expressionString = exprJe.toString();
            }
            checker.reportError(tree, "contracts.precondition", tree.getMethodSelect().toString(), contractExpressionAndType(expressionString, inferredAnno), contractExpressionAndType(expressionString, anno));
        }
    }
}

Example 10 with JavaExpressionParseException

use of org.checkerframework.framework.util.JavaExpressionParseUtil.JavaExpressionParseException in project checker-framework by typetools.

the class DependentTypesHelper method delocalize.

/**
 * Viewpoint-adapt all dependent type annotations to the method declaration, {@code
 * methodDeclTree}. This method changes occurrences of formal parameter names to the "#2" syntax,
 * and it removes expressions that contain other local variables.
 *
 * <p>If a Java expression in {@code atm} references local variables (other than formal
 * parameters), the expression is removed from the annotation. This could result in dependent type
 * annotations with empty lists of expressions. If this is a problem, a subclass can override
 * {@link #buildAnnotation(AnnotationMirror, Map)} to do something besides creating an annotation
 * with a empty list.
 *
 * @param atm type to viewpoint-adapt; is side-effected by this method
 * @param methodDeclTree the method declaration to which the annotations are viewpoint-adapted
 */
public void delocalize(AnnotatedTypeMirror atm, MethodTree methodDeclTree) {
    if (!hasDependentType(atm)) {
        return;
    }
    TreePath pathToMethodDecl = factory.getPath(methodDeclTree);
    ExecutableElement methodElement = TreeUtils.elementFromDeclaration(methodDeclTree);
    List<FormalParameter> parameters = JavaExpression.getFormalParameters(methodElement);
    List<JavaExpression> paramsAsLocals = JavaExpression.getParametersAsLocalVariables(methodElement);
    StringToJavaExpression stringToJavaExpr = expression -> {
        JavaExpression javaExpr;
        try {
            javaExpr = StringToJavaExpression.atPath(expression, pathToMethodDecl, factory.getChecker());
        } catch (JavaExpressionParseException ex) {
            return null;
        }
        JavaExpressionConverter jec = new JavaExpressionConverter() {

            @Override
            protected JavaExpression visitLocalVariable(LocalVariable localVarExpr, Void unused) {
                int index = paramsAsLocals.indexOf(localVarExpr);
                if (index == -1) {
                    throw new FoundLocalException();
                }
                return parameters.get(index);
            }
        };
        try {
            return jec.convert(javaExpr);
        } catch (FoundLocalException ex) {
            return null;
        }
    };
    if (debugStringToJavaExpression) {
        System.out.printf("delocalize(%s, %s) created %s%n", atm, TreeUtils.toStringTruncated(methodDeclTree, 65), stringToJavaExpr);
    }
    convertAnnotatedTypeMirror(stringToJavaExpr, atm);
}