private static boolean isValueOfInvocation(ExpressionTree abstractTypedTree) {
if (!abstractTypedTree.is(Kind.METHOD_INVOCATION)) {
return false;
}
Type type = abstractTypedTree.symbolType();
MethodMatcher valueOfMatcher =
MethodMatcher.create()
.typeDefinition(type.fullyQualifiedName())
.name("valueOf")
.addParameter(((JavaType) type).primitiveType().fullyQualifiedName());
return valueOfMatcher.matches((MethodInvocationTree) abstractTypedTree);
}
@Override
public void visitNode(Tree tree) {
ListTree<TypeTree> thrownList = ((MethodTree) tree).throwsClauses();
Set<String> reported = new HashSet<>();
for (TypeTree typeTree : thrownList) {
Type symbolType = typeTree.symbolType();
String fullyQualifiedName = symbolType.fullyQualifiedName();
if (!reported.contains(fullyQualifiedName)) {
String superTypeName = isSubclassOfAny(symbolType, thrownList);
if (superTypeName != null) {
addIssue(
typeTree,
"Remove the declaration of thrown exception '"
+ fullyQualifiedName
+ "' which is a subclass of '"
+ superTypeName
+ "'.");
} else if (symbolType.isSubtypeOf("java.lang.RuntimeException")) {
addIssue(
typeTree,
"Remove the declaration of thrown exception '"
+ fullyQualifiedName
+ "' which is a runtime exception.");
} else if (declaredMoreThanOnce(fullyQualifiedName, thrownList)) {
addIssue(
typeTree,
"Remove the redundant '" + fullyQualifiedName + "' thrown exception declaration(s).");
}
reported.add(fullyQualifiedName);
}
}
}
private static boolean superClassHasOnlyStaticMethods(Symbol.TypeSymbol newClassTypeSymbol) {
Type superClass = newClassTypeSymbol.superClass();
if (superClass != null && !superClass.is("java.lang.Object")) {
return hasOnlyStaticMethods(superClass.symbol());
}
return true;
}
@Override
protected void onMethodInvocationFound(MethodInvocationTree mit) {
Type symbolType = mit.arguments().get(0).symbolType();
if (!(symbolType.is("long") || symbolType.is("java.lang.Long"))) {
reportIssue(MethodsHelper.methodName(mit), "Remove this \"Double.longBitsToDouble\" call.");
}
}
private static String isSubclassOfAny(Type type, ListTree<TypeTree> thrownList) {
for (TypeTree thrown : thrownList) {
String name = thrown.symbolType().fullyQualifiedName();
if (!type.is(name) && type.isSubtypeOf(name)) {
return name;
}
}
return null;
}
private static boolean isNanTest(BinaryExpressionTree tree) {
Type leftOperandType = tree.leftOperand().symbolType();
if (tree.is(Tree.Kind.NOT_EQUAL_TO)
&& (leftOperandType.isPrimitive(Type.Primitives.FLOAT)
|| leftOperandType.isPrimitive(Type.Primitives.DOUBLE))) {
return true;
}
return false;
}
@Override
public void visitAssignmentExpression(AssignmentExpressionTree tree) {
Type wrapper = ((JavaType) tree.expression().symbolType()).primitiveWrapperType();
if (tree.is(Kind.PLUS_ASSIGNMENT)
&& tree.variable().symbolType().is("java.lang.String")
&& wrapper != null) {
createIssue(tree, wrapper.name());
}
super.visitAssignmentExpression(tree);
}
private SymbolicValue createIdentifierSymbolicValue(IdentifierTree identifier) {
final Type type = identifier.symbol().type();
if (type != null && type.is("java.lang.Boolean")) {
if ("TRUE".equals(identifier.name())) {
return SymbolicValue.TRUE_LITERAL;
} else if ("FALSE".equals(identifier.name())) {
return SymbolicValue.FALSE_LITERAL;
}
}
return createDefaultSymbolicValue();
}
private void checkConcatenation(
Tree tree, ExpressionTree leftOperand, ExpressionTree rightOperand) {
Type wrapper = null;
if (isEmptyString(leftOperand)) {
wrapper = ((JavaType) rightOperand.symbolType()).primitiveWrapperType();
} else if (isEmptyString(rightOperand)) {
wrapper = ((JavaType) leftOperand.symbolType()).primitiveWrapperType();
}
if (wrapper != null) {
createIssue(tree, wrapper.name());
}
}
private static List<Symbol> retrieveMembers(Symbol.TypeSymbol classSymbol) {
List<Symbol> results = Lists.newLinkedList();
results.addAll(extractMembers(classSymbol, false));
for (Type parentInterface : classSymbol.interfaces()) {
results.addAll(extractMembers(parentInterface.symbol(), true));
}
Type superClass = classSymbol.superClass();
if (superClass != null) {
results.addAll(extractMembers(superClass.symbol(), true));
}
return results;
}
private void checkExpression(ExpressionTree expression, Type implicitType) {
if (implicitType.isPrimitive()) {
checkForBoxing(expression);
} else {
checkForUnboxing(expression);
}
}
@Override
protected void onMethodInvocationFound(MethodInvocationTree tree) {
Type argumentType = tree.arguments().get(0).symbolType();
Type collectionType = getMethodOwner(tree);
// can be null when using raw types
Type collectionParameterType = getTypeParameter(collectionType);
if (collectionParameterType != null
&& !collectionParameterType.isUnknown()
&& !isArgumentCompatible(argumentType, collectionParameterType)) {
addIssue(
tree,
MessageFormat.format(
"A \"{0}<{1}>\" cannot contain a \"{2}\"",
collectionType, collectionParameterType, argumentType));
}
}
private static boolean needsClosing(Type type) {
for (String ignoredTypes : IGNORED_CLOSEABLE_SUBTYPES) {
if (type.is(ignoredTypes)) {
return false;
}
}
return isCloseable(type);
}
private static boolean hasOneAbstractMethod(ClassTree classTree) {
TypeSymbol symbol = classTree.symbol();
if (symbol != null) {
List<Type> types = symbol.interfaces();
for (Type type : types) {
if (!type.symbol().memberSymbols().isEmpty()) {
return false;
}
}
}
int methods = 0;
for (Tree member : classTree.members()) {
boolean isMethod = member.is(Tree.Kind.METHOD);
if (!isMethod) {
return false;
}
if (isNotObjectMethod((MethodTree) member) && isNonStaticNonDefaultMethod(member)) {
methods++;
}
}
return methods == 1;
}
private static boolean autoboxing(Type argumentType, Type collectionParameterType) {
return argumentType.isPrimitive()
&& ((JavaType) collectionParameterType).isPrimitiveWrapper()
&& isSubtypeOf(((JavaType) argumentType).primitiveWrapperType(), collectionParameterType);
}
private static boolean isSubtypeOf(Type type, Type superType) {
return type.isSubtypeOf(superType);
}
private static boolean isArgumentCompatible(Type argumentType, Type collectionParameterType) {
return isSubtypeOf(argumentType.erasure(), collectionParameterType.erasure())
|| isSubtypeOf(collectionParameterType.erasure(), argumentType.erasure())
|| autoboxing(argumentType, collectionParameterType);
}
private static boolean isCloseable(Type type) {
return type.isSubtypeOf(JAVA_IO_AUTO_CLOSEABLE) || type.isSubtypeOf(JAVA_IO_CLOSEABLE);
}
private boolean instantiateOwnClass(Tree identifier, Symbol.TypeSymbol newClassTypeSymbol) {
Type enclosingClassType = getSemanticModel().getEnclosingClass(identifier).type();
return enclosingClassType.equals(newClassTypeSymbol.type());
}
private static Type getRootElementType(Type type) {
return type.isArray() ? getRootElementType(((ArrayType) type).elementType()) : type;
}
private static boolean isIntegerOrLongExpected(Type type) {
return type.isPrimitive(Primitives.INT) || type.isPrimitive(Primitives.LONG);
}
private static boolean dissimilarPrimitiveTypeWrappers(Type trueExprType, Type falseExprType) {
return isPrimitiveWrapper(trueExprType)
&& isPrimitiveWrapper(falseExprType)
&& !trueExprType.equals(falseExprType);
}