@Override
public List<ErrorDescription> run(CompilationInfo info, TreePath treePath) {
Tree t = treePath.getLeaf();
JTextComponent editor = EditorRegistry.lastFocusedComponent();
Document doc = editor.getDocument();
SourcePositions sp = info.getTrees().getSourcePositions();
int start = (int) sp.getStartPosition(info.getCompilationUnit(), t);
int end = (int) sp.getEndPosition(info.getCompilationUnit(), t);
int endLine = info.getText().indexOf("\n", start);
String line = info.getText().substring(start, endLine).trim();
if (!Suppression.isSuppressed(line)) {
return Collections.<ErrorDescription>singletonList(
ErrorDescriptionFactory.createErrorDescription(
Severity.HINT,
ERROR_DESCRIPTION,
createFixes(doc, start, endLine),
info.getFileObject(),
start,
end));
} else {
return null;
}
}
private static List<? extends TypeMirror> computeReturn(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ReturnTree rt = (ReturnTree) parent.getLeaf();
if (rt.getExpression() == error) {
TreePath method = findMethod(parent);
if (method == null) {
return null;
}
Element el = info.getTrees().getElement(method);
if (el == null || el.getKind() != ElementKind.METHOD) {
return null;
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(((ExecutableElement) el).getReturnType());
}
return null;
}
private static List<? extends TypeMirror> computeVariableDeclaration(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
VariableTree vt = (VariableTree) parent.getLeaf();
if (vt.getInitializer() == error) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(
info.getTrees().getTypeMirror(new TreePath(parent, vt.getType())));
}
TreePath context = parent.getParentPath();
if (vt.getType() != error || context == null) {
return null;
}
switch (context.getLeaf().getKind()) {
case ENHANCED_FOR_LOOP:
ExpressionTree iterableTree = ((EnhancedForLoopTree) context.getLeaf()).getExpression();
TreePath iterablePath = new TreePath(context, iterableTree);
TypeMirror type = getIterableGenericType(info, iterablePath);
types.add(ElementKind.LOCAL_VARIABLE);
return Collections.singletonList(type);
default:
types.add(ElementKind.CLASS);
return Collections.<TypeMirror>emptyList();
}
}
private static List<? extends TypeMirror> computeEnhancedForLoop(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
EnhancedForLoopTree efl = (EnhancedForLoopTree) parent.getLeaf();
if (efl.getExpression() != error) {
return null;
}
TypeMirror argument =
info.getTrees()
.getTypeMirror(
new TreePath(new TreePath(parent, efl.getVariable()), efl.getVariable().getType()));
if (argument == null) return null;
if (argument.getKind().isPrimitive()) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getArrayType(argument));
}
TypeElement iterable = info.getElements().getTypeElement("java.lang.Iterable"); // NOI18N
if (iterable == null) {
return null;
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getDeclaredType(iterable, argument));
}
private static List<? extends TypeMirror> computeParametrizedType(
Set<ElementKind> types,
CompilationInfo info,
TreePath parent,
Tree error,
int offset,
TypeMirror[] typeParameterBound,
int[] numTypeParameters) {
ParameterizedTypeTree ptt = (ParameterizedTypeTree) parent.getLeaf();
if (ptt.getType() == error) {
Tree gpt = parent.getParentPath().getLeaf();
if (TreeUtilities.CLASS_TREE_KINDS.contains(gpt.getKind())
&& ((ClassTree) gpt).getExtendsClause() == ptt) {
types.add(ElementKind.CLASS);
} else if (TreeUtilities.CLASS_TREE_KINDS.contains(gpt.getKind())
&& ((ClassTree) gpt).getImplementsClause().contains(ptt)) {
types.add(ElementKind.INTERFACE);
} else {
types.add(ElementKind.CLASS);
types.add(ElementKind.INTERFACE);
}
if (numTypeParameters != null) {
numTypeParameters[0] = ptt.getTypeArguments().size();
}
return null;
}
TypeMirror resolved = info.getTrees().getTypeMirror(parent);
DeclaredType resolvedDT = null;
if (resolved != null && resolved.getKind() == TypeKind.DECLARED) {
resolvedDT = (DeclaredType) resolved;
}
int index = 0;
for (Tree t : ptt.getTypeArguments()) {
if (t == error) {
if (resolvedDT != null && typeParameterBound != null) {
List<? extends TypeMirror> typeArguments =
((DeclaredType) resolvedDT.asElement().asType()).getTypeArguments();
if (typeArguments.size() > index) {
typeParameterBound[0] = ((TypeVariable) typeArguments.get(index)).getUpperBound();
}
}
types.add(ElementKind.CLASS); // XXX: class/interface/enum/annotation?
return null;
}
index++;
}
return null;
}
/* (non-Javadoc)
* @see com.sun.source.util.TreeScanner#visitClass(com.sun.source.tree.ClassTree, java.lang.Object)
*/
@Override
public Void visitClass(ClassTree t, Void v) {
Element el = info.getTrees().getElement(getCurrentPath());
if (el == null) {
StatusDisplayer.getDefault().setStatusText("Cannot resolve class!");
} else {
typeElement = (TypeElement) el;
}
return null;
}
private static List<? extends TypeMirror> computeAssignment(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
AssignmentTree at = (AssignmentTree) parent.getLeaf();
TypeMirror type = null;
if (at.getVariable() == error) {
type = info.getTrees().getTypeMirror(new TreePath(parent, at.getExpression()));
if (type != null) {
// anonymous class?
type = org.netbeans.modules.java.hints.errors.Utilities.convertIfAnonymous(type);
if (type.getKind() == TypeKind.EXECUTABLE) {
// TODO: does not actualy work, attempt to solve situations like:
// t = Collections.emptyList()
// t = Collections.<String>emptyList();
// see also testCreateFieldMethod1 and testCreateFieldMethod2 tests:
type = ((ExecutableType) type).getReturnType();
}
}
}
if (at.getExpression() == error) {
type = info.getTrees().getTypeMirror(new TreePath(parent, at.getVariable()));
}
// class or field:
if (type == null) {
if (ErrorHintsProvider.ERR.isLoggable(ErrorManager.INFORMATIONAL)) {
ErrorHintsProvider.ERR.log(ErrorManager.INFORMATIONAL, "offset=" + offset);
ErrorHintsProvider.ERR.log(ErrorManager.INFORMATIONAL, "errorTree=" + error);
ErrorHintsProvider.ERR.log(ErrorManager.INFORMATIONAL, "type=null");
}
return null;
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(type);
}
private static List<? extends TypeMirror> computeBinaryOperator(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
BinaryTree bt = (BinaryTree) parent.getLeaf();
TreePath typeToResolve = null;
if (bt.getLeftOperand() == error) {
typeToResolve = new TreePath(parent, bt.getRightOperand());
}
if (bt.getRightOperand() == error) {
typeToResolve = new TreePath(parent, bt.getLeftOperand());
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return typeToResolve != null
? Collections.singletonList(info.getTrees().getTypeMirror(typeToResolve))
: null;
}
private static List<? extends TypeMirror> computeNewArray(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
NewArrayTree nat = (NewArrayTree) parent.getLeaf();
if (nat.getType() == error) {
types.add(ElementKind.CLASS);
types.add(ElementKind.ENUM);
types.add(ElementKind.INTERFACE);
return null;
}
for (Tree dimension : nat.getDimensions()) {
if (dimension == error) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getPrimitiveType(TypeKind.INT));
}
}
for (Tree init : nat.getInitializers()) {
if (init == error) {
TypeMirror whole = info.getTrees().getTypeMirror(parent);
if (whole == null || whole.getKind() != TypeKind.ARRAY) return null;
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(((ArrayType) whole).getComponentType());
}
}
return null;
}
private static List<? extends TypeMirror> computeMethod(
Set<ElementKind> types,
CompilationInfo info,
TreePath parent,
TypeMirror[] typeParameterBound,
Tree error,
int offset) {
// class or field:
// check the error is in the body:
// #92419: check for abstract method/method without body:
MethodTree mt = (MethodTree) parent.getLeaf();
if (mt.getReturnType() == error) {
types.add(ElementKind.CLASS);
types.add(ElementKind.INTERFACE);
types.add(ElementKind.ENUM);
}
List<? extends ExpressionTree> throwList = mt.getThrows();
if (throwList != null && !throwList.isEmpty()) {
for (ExpressionTree t : throwList) {
if (t == error) {
types.add(ElementKind.CLASS);
typeParameterBound[0] = info.getElements().getTypeElement("java.lang.Exception").asType();
break;
}
}
}
if (mt.getBody() == null) {
return null;
}
try {
Document doc = info.getDocument();
if (doc != null) { // XXX
int bodyStart =
Utilities.findBodyStart(
parent.getLeaf(),
info.getCompilationUnit(),
info.getTrees().getSourcePositions(),
doc);
int bodyEnd =
(int)
info.getTrees()
.getSourcePositions()
.getEndPosition(info.getCompilationUnit(), parent.getLeaf());
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
if (bodyStart <= offset && offset <= bodyEnd)
return Collections.singletonList(
info.getElements().getTypeElement("java.lang.Object").asType());
}
} catch (IOException ex) {
Logger.getLogger("global").log(Level.INFO, ex.getMessage(), ex);
}
return null;
}