use of org.checkerframework.dataflow.cfg.node.BooleanLiteralNode in project checker-framework by typetools.
the class BaseTypeVisitor method checkConditionalPostcondition.
/**
* Check that the expression's type is annotated with {@code annotation} at every regular exit
* that returns {@code result}
*
* @param node tree of method with the postcondition
* @param annotation expression's type must have this annotation
* @param expression the expression that the postcondition concerns
* @param result result for which the postcondition is valid
*/
protected void checkConditionalPostcondition(MethodTree node, AnnotationMirror annotation, Receiver expression, boolean result) {
boolean booleanReturnType = TypesUtils.isBooleanType(TreeUtils.typeOf(node.getReturnType()));
if (!booleanReturnType) {
checker.report(Result.failure("contracts.conditional.postcondition.invalid.returntype"), node);
// annotation is invalid.
return;
}
for (Pair<ReturnNode, ?> pair : atypeFactory.getReturnStatementStores(node)) {
ReturnNode returnStmt = pair.first;
Node retValNode = returnStmt.getResult();
Boolean retVal = retValNode instanceof BooleanLiteralNode ? ((BooleanLiteralNode) retValNode).getValue() : null;
TransferResult<?, ?> transferResult = (TransferResult<?, ?>) pair.second;
if (transferResult == null) {
// Unreachable return statements have no stores, but there is no need to check them.
continue;
}
CFAbstractStore<?, ?> exitStore = (CFAbstractStore<?, ?>) (result ? transferResult.getThenStore() : transferResult.getElseStore());
CFAbstractValue<?> value = exitStore.getValue(expression);
// this means the result is a boolean literal
if (!(retVal == null || retVal == result)) {
continue;
}
AnnotationMirror inferredAnno = null;
if (value != null) {
QualifierHierarchy hierarchy = atypeFactory.getQualifierHierarchy();
Set<AnnotationMirror> annos = value.getAnnotations();
inferredAnno = hierarchy.findAnnotationInSameHierarchy(annos, annotation);
}
if (!checkContract(expression, annotation, inferredAnno, exitStore)) {
checker.report(Result.failure("contracts.conditional.postcondition.not.satisfied", expression.toString()), returnStmt.getTree());
}
}
}
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