private static List<? extends TypeMirror> computeUnary(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
UnaryTree tree = (UnaryTree) parent.getLeaf();
if (tree.getExpression() == error) {
List<? extends TypeMirror> parentTypes =
resolveType(types, info, parent.getParentPath(), tree, offset, null, null);
if (parentTypes != null) {
// may contain only "void", ignore:
if (parentTypes.size() != 1) {
return parentTypes;
}
if (parentTypes.get(0).getKind() != TypeKind.VOID) {
return parentTypes;
}
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getPrimitiveType(TypeKind.INT));
}
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> 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;
}
private static TreePath findMethod(TreePath tp) {
while (!STOP_LOOKING_FOR_METHOD.contains(tp.getLeaf().getKind())) {
tp = tp.getParentPath();
}
if (tp.getLeaf().getKind() == Kind.METHOD) {
return tp;
}
return null;
}
/**
* Search up the hierarchy of elements for one of the given kind.
*
* @param kind the element's kind to search for
* @param path the starting element
* @return {@code null} if no element was found.
*/
static TreePath getParentElementOfKind(Tree.Kind kind, TreePath path) {
if (path != null) {
TreePath tpath = path;
while (tpath != null) {
if (kind == tpath.getLeaf().getKind()) {
return tpath;
}
tpath = tpath.getParentPath();
}
}
return null;
}
/** {@inheritDoc} */
@Override
public boolean isSatisfiedBy(TreePath path) {
do {
Tree.Kind kind = path.getLeaf().getKind();
if (kind == Tree.Kind.METHOD) return false;
if (ASTPath.isClassEquiv(kind)) {
return true;
}
path = path.getParentPath();
} while (path != null && path.getLeaf() != null);
return true;
}
@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> computeMethodInvocation(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
MethodInvocationTree nat = (MethodInvocationTree) parent.getLeaf();
boolean errorInRealArguments = false;
for (Tree param : nat.getArguments()) {
errorInRealArguments |= param == error;
}
if (errorInRealArguments) {
TypeMirror[] proposedType = new TypeMirror[1];
int[] proposedIndex = new int[1];
ExecutableElement ee =
org.netbeans.modules.editor.java.Utilities.fuzzyResolveMethodInvocation(
info, parent, proposedType, proposedIndex);
if (ee == null) { // cannot be resolved
return null;
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(proposedType[0]);
}
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> 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> computeParenthesis(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ParenthesizedTree pt = (ParenthesizedTree) parent.getLeaf();
if (pt.getExpression() != error) {
return null;
}
TreePath parentParent = parent.getParentPath();
List<? extends TypeMirror> upperTypes =
resolveType(types, info, parentParent, pt, offset, null, null);
if (upperTypes == null) {
return null;
}
return upperTypes;
}
private static List<? extends TypeMirror> computeArrayAccess(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ArrayAccessTree aat = (ArrayAccessTree) parent.getLeaf();
if (aat.getExpression() == error) {
TreePath parentParent = parent.getParentPath();
List<? extends TypeMirror> upperTypes =
resolveType(types, info, parentParent, aat, offset, null, null);
if (upperTypes == null) {
return null;
}
List<TypeMirror> arrayTypes = new ArrayList<TypeMirror>();
for (TypeMirror tm : upperTypes) {
if (tm == null) continue;
switch (tm.getKind()) {
case VOID:
case EXECUTABLE:
case WILDCARD:
case PACKAGE:
continue;
}
arrayTypes.add(info.getTypes().getArrayType(tm));
}
if (arrayTypes.isEmpty()) return null;
return arrayTypes;
}
if (aat.getIndex() == error) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getPrimitiveType(TypeKind.INT));
}
return null;
}
private static List<? extends TypeMirror> computeNewClass(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
NewClassTree nct = (NewClassTree) parent.getLeaf();
boolean errorInRealArguments = false;
for (Tree param : nct.getArguments()) {
errorInRealArguments |= param == error;
}
if (errorInRealArguments) {
TypeMirror[] proposedType = new TypeMirror[1];
int[] proposedIndex = new int[1];
ExecutableElement ee =
org.netbeans.modules.editor.java.Utilities.fuzzyResolveMethodInvocation(
info, parent, proposedType, proposedIndex);
if (ee == null) { // cannot be resolved
return null;
}
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(proposedType[0]);
}
Tree id = nct.getIdentifier();
if (id.getKind() == Kind.PARAMETERIZED_TYPE) {
id = ((ParameterizedTypeTree) id).getType();
}
if (id == error) {
return resolveType(
EnumSet.noneOf(ElementKind.class), info, parent.getParentPath(), nct, offset, null, null);
}
return null;
}
private static List<? extends TypeMirror> computeTypeParameter(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
TypeParameterTree tpt = (TypeParameterTree) parent.getLeaf();
for (Tree t : tpt.getBounds()) {
if (t == error) {
types.add(ElementKind.CLASS); // XXX: class/interface/enum/annotation?
return null;
}
}
return null;
}
private static List<? extends TypeMirror> computeConditionalExpression(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ConditionalExpressionTree cet = (ConditionalExpressionTree) parent.getLeaf();
if (cet.getCondition() == error) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return Collections.singletonList(info.getTypes().getPrimitiveType(TypeKind.BOOLEAN));
}
if (cet.getTrueExpression() == error || cet.getFalseExpression() == error) {
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
return resolveType(types, info, parent.getParentPath(), cet, offset, null, null);
}
return null;
}
private static List<? extends TypeMirror> computeImport(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ImportTree tree = (ImportTree) parent.getLeaf();
if (tree.getQualifiedIdentifier() == error) {
types.add(ElementKind.ANNOTATION_TYPE);
types.add(ElementKind.CLASS);
types.add(ElementKind.ENUM);
types.add(ElementKind.INTERFACE);
return Collections.singletonList(
info.getElements().getTypeElement("java.lang.Object").asType());
}
return null;
}
private static List<? extends TypeMirror> computeAssert(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
AssertTree at = (AssertTree) parent.getLeaf();
types.add(ElementKind.PARAMETER);
types.add(ElementKind.LOCAL_VARIABLE);
types.add(ElementKind.FIELD);
if (at.getCondition() == error) {
return Collections.singletonList(info.getTypes().getPrimitiveType(TypeKind.BOOLEAN));
}
if (at.getDetail() == error) {
return Collections.singletonList(
info.getElements().getTypeElement("java.lang.Object").asType());
}
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> computeMemberSelect(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
// class or field:
MemberSelectTree ms = (MemberSelectTree) parent.getLeaf();
final TypeElement jlObject = info.getElements().getTypeElement("java.lang.Object");
if (jlObject != null // may happen if the platform is broken
&& !"class"
.equals(
ms.getIdentifier()
.toString())) { // we obviously should not propose "Create Field" for
// unknown.class:
types.add(ElementKind.FIELD);
types.add(ElementKind.CLASS);
return Collections.singletonList(jlObject.asType());
}
return null;
}
private static List<? extends TypeMirror> computeClass(
Set<ElementKind> types, CompilationInfo info, TreePath parent, Tree error, int offset) {
ClassTree ct = (ClassTree) parent.getLeaf();
if (ct.getExtendsClause() == error) {
types.add(ElementKind.CLASS);
return null;
}
for (Tree t : ct.getImplementsClause()) {
if (t == error) {
types.add(ElementKind.INTERFACE);
return null;
}
}
// XXX: annotation types...
return null;
}
/**
* In the first enclosing class, find the top-level member that contains tree. TODO: should we
* look whether these elements are enclosed within another class that is itself under
* construction.
*
* <p>Are there any other type of top level objects?
*/
private Tree findTopLevelClassMemberForTree(TreePath path) {
ClassTree enclosingClass = TreeUtils.enclosingClass(path);
if (enclosingClass != null) {
List<? extends Tree> classMembers = enclosingClass.getMembers();
TreePath searchPath = path;
while (searchPath.getParentPath() != null && searchPath.getParentPath() != enclosingClass) {
searchPath = searchPath.getParentPath();
if (classMembers.contains(searchPath.getLeaf())) {
return searchPath.getLeaf();
}
}
}
return null;
}
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 JCCompilationUnit toUnit(Element element) {
TreePath path = trees == null ? null : trees.getPath(element);
if (path == null) return null;
return (JCCompilationUnit) path.getCompilationUnit();
}
@Override
public void apply(TreePath path, Context context, DescriptionListener listener) {
RefasterScanner.create(this, listener)
.scan(path, prepareContext(context, (JCCompilationUnit) path.getCompilationUnit()));
}
public static List<? extends TypeMirror> resolveType(
Set<ElementKind> types,
CompilationInfo info,
TreePath currentPath,
Tree unresolved,
int offset,
TypeMirror[] typeParameterBound,
int[] numTypeParameters) {
switch (currentPath.getLeaf().getKind()) {
case METHOD:
return computeMethod(types, info, currentPath, typeParameterBound, unresolved, offset);
case MEMBER_SELECT:
return computeMemberSelect(types, info, currentPath, unresolved, offset);
case ASSIGNMENT:
return computeAssignment(types, info, currentPath, unresolved, offset);
case ENHANCED_FOR_LOOP:
return computeEnhancedForLoop(types, info, currentPath, unresolved, offset);
case ARRAY_ACCESS:
return computeArrayAccess(types, info, currentPath, unresolved, offset);
case VARIABLE:
return computeVariableDeclaration(types, info, currentPath, unresolved, offset);
case ASSERT:
return computeAssert(types, info, currentPath, unresolved, offset);
case PARENTHESIZED:
return computeParenthesis(types, info, currentPath, unresolved, offset);
case DO_WHILE_LOOP:
return computePrimitiveType(
types,
info,
((DoWhileLoopTree) currentPath.getLeaf()).getCondition(),
unresolved,
TypeKind.BOOLEAN);
case FOR_LOOP:
return computePrimitiveType(
types,
info,
((ForLoopTree) currentPath.getLeaf()).getCondition(),
unresolved,
TypeKind.BOOLEAN);
case IF:
return computePrimitiveType(
types,
info,
((IfTree) currentPath.getLeaf()).getCondition(),
unresolved,
TypeKind.BOOLEAN);
case WHILE_LOOP:
return computePrimitiveType(
types,
info,
((WhileLoopTree) currentPath.getLeaf()).getCondition(),
unresolved,
TypeKind.BOOLEAN);
case SYNCHRONIZED:
return computeReferenceType(
types,
info,
((SynchronizedTree) currentPath.getLeaf()).getExpression(),
unresolved,
"java.lang.Object");
case THROW:
return computeReferenceType(
types,
info,
((ThrowTree) currentPath.getLeaf()).getExpression(),
unresolved,
"java.lang.Exception");
case INSTANCE_OF:
return computeReferenceType(
types,
info,
((InstanceOfTree) currentPath.getLeaf()).getExpression(),
unresolved,
"java.lang.Object");
case SWITCH:
// TODO: should consider also values in the cases?:
return computePrimitiveType(
types,
info,
((SwitchTree) currentPath.getLeaf()).getExpression(),
unresolved,
TypeKind.INT);
case EXPRESSION_STATEMENT:
return Collections.singletonList(info.getTypes().getNoType(TypeKind.VOID));
case RETURN:
return computeReturn(types, info, currentPath, unresolved, offset);
case TYPE_PARAMETER:
return computeTypeParameter(types, info, currentPath, unresolved, offset);
case PARAMETERIZED_TYPE:
return computeParametrizedType(
types, info, currentPath, unresolved, offset, typeParameterBound, numTypeParameters);
case ANNOTATION_TYPE:
case CLASS:
case ENUM:
case INTERFACE:
return computeClass(types, info, currentPath, unresolved, offset);
case CONDITIONAL_EXPRESSION:
return computeConditionalExpression(types, info, currentPath, unresolved, offset);
case NEW_ARRAY:
return computeNewArray(types, info, currentPath, unresolved, offset);
case METHOD_INVOCATION:
return computeMethodInvocation(types, info, currentPath, unresolved, offset);
case NEW_CLASS:
return computeNewClass(types, info, currentPath, unresolved, offset);
case POSTFIX_INCREMENT:
case POSTFIX_DECREMENT:
case PREFIX_INCREMENT:
case PREFIX_DECREMENT:
case UNARY_PLUS:
case UNARY_MINUS:
case BITWISE_COMPLEMENT:
case LOGICAL_COMPLEMENT:
return computeUnary(types, info, currentPath, unresolved, offset);
case MULTIPLY:
case DIVIDE:
case REMAINDER:
case PLUS:
case MINUS:
case LEFT_SHIFT:
case RIGHT_SHIFT:
case UNSIGNED_RIGHT_SHIFT:
case LESS_THAN:
case GREATER_THAN:
case LESS_THAN_EQUAL:
case GREATER_THAN_EQUAL:
case EQUAL_TO:
case NOT_EQUAL_TO:
case AND:
case XOR:
case OR:
case CONDITIONAL_AND:
case CONDITIONAL_OR:
return computeBinaryOperator(types, info, currentPath, unresolved, offset);
case MULTIPLY_ASSIGNMENT:
case DIVIDE_ASSIGNMENT:
case REMAINDER_ASSIGNMENT:
case PLUS_ASSIGNMENT:
case MINUS_ASSIGNMENT:
case LEFT_SHIFT_ASSIGNMENT:
case RIGHT_SHIFT_ASSIGNMENT:
case UNSIGNED_RIGHT_SHIFT_ASSIGNMENT:
case AND_ASSIGNMENT:
case XOR_ASSIGNMENT:
case OR_ASSIGNMENT:
// XXX: return computeCompoundAssignment(types, info, currentPath, unresolved, offset);
return null;
case ARRAY_TYPE:
return computeArrayType(types, info, currentPath, unresolved, offset);
case IMPORT:
return computeImport(types, info, currentPath, unresolved, offset);
case BLOCK:
case BREAK:
case CATCH:
case COMPILATION_UNIT:
case CONTINUE:
case IDENTIFIER:
case TYPE_CAST:
case TRY:
case EMPTY_STATEMENT:
case PRIMITIVE_TYPE:
case LABELED_STATEMENT:
case MODIFIERS:
case ERRONEOUS:
case OTHER:
case INT_LITERAL:
case LONG_LITERAL:
case FLOAT_LITERAL:
case DOUBLE_LITERAL:
case BOOLEAN_LITERAL:
case CHAR_LITERAL:
case STRING_LITERAL:
case NULL_LITERAL:
// ignored:
return null;
case CASE:
case ANNOTATION:
case UNBOUNDED_WILDCARD:
case EXTENDS_WILDCARD:
case SUPER_WILDCARD:
// XXX: currently unhandled
return null;
default:
// should not happen unless set of Tree.Kind changes:
return null;
}
}
/**
* Given a TreePath, walks up the tree until it finds a node of the given type and returns the
* path from that node to the top-level node in the path (typically a {@code
* CompilationUnitTree}).
*/
public static <T> TreePath findPathFromEnclosingNodeToTopLevel(TreePath path, Class<T> klass) {
while (path != null && !(klass.isInstance(path.getLeaf()))) {
path = path.getParentPath();
}
return path;
}
/** {@inheritDoc} */
@Override
public boolean isSatisfiedBy(TreePath path, Tree leaf) {
assert path == null || path.getLeaf() == leaf;
return isSatisfiedBy(path);
}
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;
}
/** Given a TreePath, walks up the tree until it finds a node of the given type. */
public static <T> T findEnclosingNode(TreePath path, Class<T> klass) {
path = findPathFromEnclosingNodeToTopLevel(path, klass);
return (path == null) ? null : klass.cast(path.getLeaf());
}