Examples with StringToJavaExpression org.checkerframework.framework.util.StringToJavaExpression used on opensource projects

Example 6 with StringToJavaExpression

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

the class DependentTypesHelper method atTypeDecl.

/**
 * Standardizes the Java expressions in annotations to a type declaration.
 *
 * @param type the type of the type declaration; is side-effected by this method
 * @param typeElt the element of the type declaration
 */
public void atTypeDecl(AnnotatedTypeMirror type, TypeElement typeElt) {
    if (!hasDependentType(type)) {
        return;
    }
    StringToJavaExpression stringToJavaExpr = stringExpr -> StringToJavaExpression.atTypeDecl(stringExpr, typeElt, factory.getChecker());
    if (debugStringToJavaExpression) {
        System.out.printf("atTypeDecl(%s, %s) created %s%n", type, typeElt, stringToJavaExpr);
    }
    convertAnnotatedTypeMirror(stringToJavaExpr, type);
}

Example 7 with StringToJavaExpression

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

the class BaseTypeVisitor method parseAndLocalizeContracts.

/**
 * Localizes some contracts -- that is, viewpoint-adapts them to some method body, according to
 * the value of {@link #methodTree}.
 *
 * <p>The input is a set of {@link Contract}s, each of which contains an expression string and an
 * annotation. In a {@link Contract}, Java expressions are exactly as written in source code, not
 * standardized or viewpoint-adapted.
 *
 * <p>The output is a set of pairs of {@link JavaExpression} (parsed expression string) and
 * standardized annotation (with respect to the path of {@link #methodTree}. This method discards
 * any contract whose expression cannot be parsed into a JavaExpression.
 *
 * @param contractSet a set of contracts
 * @param methodType the type of the method that the contracts are for
 * @return pairs of (expression, AnnotationMirror), which are localized contracts
 */
private Set<Pair<JavaExpression, AnnotationMirror>> parseAndLocalizeContracts(Set<? extends Contract> contractSet, AnnotatedExecutableType methodType) {
    if (contractSet.isEmpty()) {
        return Collections.emptySet();
    }
    // This is the path to a place where the contract is being used, which might or might not be
    // where the contract was defined.  For example, methodTree might be an overriding
    // definition, and the contract might be for a superclass.
    MethodTree methodTree = this.methodTree;
    StringToJavaExpression stringToJavaExpr = expression -> {
        JavaExpression javaExpr = StringToJavaExpression.atMethodDecl(expression, methodType.getElement(), checker);
        // viewpoint-adapt it to methodTree.
        return javaExpr.atMethodBody(methodTree);
    };
    Set<Pair<JavaExpression, AnnotationMirror>> result = new HashSet<>(contractSet.size());
    for (Contract p : contractSet) {
        String expressionString = p.expressionString;
        AnnotationMirror annotation = p.viewpointAdaptDependentTypeAnnotation(atypeFactory, stringToJavaExpr, methodTree);
        JavaExpression exprJe;
        try {
            // TODO: currently, these expressions are parsed many times.
            // This could be optimized to store the result the first time.
            // (same for other annotations)
            exprJe = stringToJavaExpr.toJavaExpression(expressionString);
        } catch (JavaExpressionParseException e) {
            // report errors here
            checker.report(methodTree, e.getDiagMessage());
            continue;
        }
        result.add(Pair.of(exprJe, annotation));
    }
    return result;
}

Example 8 with StringToJavaExpression

use of org.checkerframework.framework.util.StringToJavaExpression 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 9 with StringToJavaExpression

use of org.checkerframework.framework.util.StringToJavaExpression 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 10 with StringToJavaExpression

use of org.checkerframework.framework.util.StringToJavaExpression 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));
        }
    }
}